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The dataset generation failed
Error code: DatasetGenerationError
Exception: ArrowInvalid
Message: JSON parse error: Column(/src/[]) changed from string to number in row 0
Traceback: Traceback (most recent call last):
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/packaged_modules/json/json.py", line 174, in _generate_tables
df = pandas_read_json(f)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/packaged_modules/json/json.py", line 38, in pandas_read_json
return pd.read_json(path_or_buf, **kwargs)
File "/src/services/worker/.venv/lib/python3.9/site-packages/pandas/io/json/_json.py", line 815, in read_json
return json_reader.read()
File "/src/services/worker/.venv/lib/python3.9/site-packages/pandas/io/json/_json.py", line 1025, in read
obj = self._get_object_parser(self.data)
File "/src/services/worker/.venv/lib/python3.9/site-packages/pandas/io/json/_json.py", line 1051, in _get_object_parser
obj = FrameParser(json, **kwargs).parse()
File "/src/services/worker/.venv/lib/python3.9/site-packages/pandas/io/json/_json.py", line 1187, in parse
self._parse()
File "/src/services/worker/.venv/lib/python3.9/site-packages/pandas/io/json/_json.py", line 1403, in _parse
ujson_loads(json, precise_float=self.precise_float), dtype=None
ValueError: Trailing data
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 1815, in _prepare_split_single
for _, table in generator:
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/packaged_modules/json/json.py", line 177, in _generate_tables
raise e
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/packaged_modules/json/json.py", line 151, in _generate_tables
pa_table = paj.read_json(
File "pyarrow/_json.pyx", line 308, in pyarrow._json.read_json
File "pyarrow/error.pxi", line 154, in pyarrow.lib.pyarrow_internal_check_status
File "pyarrow/error.pxi", line 91, in pyarrow.lib.check_status
pyarrow.lib.ArrowInvalid: JSON parse error: Column(/src/[]) changed from string to number in row 0
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1456, in compute_config_parquet_and_info_response
parquet_operations = convert_to_parquet(builder)
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1055, in convert_to_parquet
builder.download_and_prepare(
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 894, in download_and_prepare
self._download_and_prepare(
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 970, in _download_and_prepare
self._prepare_split(split_generator, **prepare_split_kwargs)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 1702, in _prepare_split
for job_id, done, content in self._prepare_split_single(
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 1858, in _prepare_split_single
raise DatasetGenerationError("An error occurred while generating the dataset") from e
datasets.exceptions.DatasetGenerationError: An error occurred while generating the datasetNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
label_file
string | code_file
string | pid
string | sid
string | funname
string | start
int64 | end
int64 | dataset
string | language
string | src
int64 | dst
int64 | groundtruth
bool | task_id
string | prompt
string | category
string | src_transformed
dict | dst_transformed
dict |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
codenet_p00496_s700056700_main_12_40.yaml
|
codenet_p00496_s700056700_main_12_40.c
|
p00496
|
s700056700
|
main
| 12 | 40 |
codenet
|
C
| 30 | 33 | true |
control_codenet_p00496_s700056700_main_12_40_k_33_1
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include <stdio.h>
2 #include <string.h>
3 #define max(a,b) ((a)>=(b)?(a):(b))
4 int dp[3001][3001];
5 char buf[30], *p;
6 int getint()
7 {
8 int n = 0;
9 while (*p >= '0') n = (n<<3) + (n<<1) + (*p++ & 0xf);
10 return n;
11 }
12 int main()
13 {
14 int a[3001];
15 int b[3001];
16 int n, t, s, i, j, k, ans;
17 fgets(p=buf, 30, stdin);
18 n = getint();
19 p++;
20 t = getint();
21 p++;
22 s = getint();
23 for (i = 1; i <= n; i++) {
24 fgets(p=buf, 30, stdin);
25 a[i] = getint();
26 p++;
27 b[i] = getint();
28 }
29 ans = 0;
30 for (i = 1; i <= n; i++)
31 for (j = 1; j <= t; j++) {
32 dp[i][j] = max(dp[i-1][j], dp[i][j-1]);
33 k = j-b[i];
34 if (k >= 0 && (s <= k || j <= s))
35 dp[i][j] = max(dp[i][j], dp[i-1][k] + a[i]);
36 ans = max(ans, dp[i][j]);
37 }
38 printf("%d\n", ans);
39 return 0;
40 }
```
**Question**: Does line `30` have control dependence over line `33` in function `main`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 30
}
|
{
"line": 33
}
|
codenet_p00496_s700056700_main_12_40.yaml
|
codenet_p00496_s700056700_main_12_40.c
|
p00496
|
s700056700
|
main
| 12 | 40 |
codenet
|
C
| 31 | 33 | true |
control_codenet_p00496_s700056700_main_12_40_k_33_2
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include <stdio.h>
2 #include <string.h>
3 #define max(a,b) ((a)>=(b)?(a):(b))
4 int dp[3001][3001];
5 char buf[30], *p;
6 int getint()
7 {
8 int n = 0;
9 while (*p >= '0') n = (n<<3) + (n<<1) + (*p++ & 0xf);
10 return n;
11 }
12 int main()
13 {
14 int a[3001];
15 int b[3001];
16 int n, t, s, i, j, k, ans;
17 fgets(p=buf, 30, stdin);
18 n = getint();
19 p++;
20 t = getint();
21 p++;
22 s = getint();
23 for (i = 1; i <= n; i++) {
24 fgets(p=buf, 30, stdin);
25 a[i] = getint();
26 p++;
27 b[i] = getint();
28 }
29 ans = 0;
30 for (i = 1; i <= n; i++)
31 for (j = 1; j <= t; j++) {
32 dp[i][j] = max(dp[i-1][j], dp[i][j-1]);
33 k = j-b[i];
34 if (k >= 0 && (s <= k || j <= s))
35 dp[i][j] = max(dp[i][j], dp[i-1][k] + a[i]);
36 ans = max(ans, dp[i][j]);
37 }
38 printf("%d\n", ans);
39 return 0;
40 }
```
**Question**: Does line `31` have control dependence over line `33` in function `main`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 31
}
|
{
"line": 33
}
|
codenet_p00496_s700056700_main_12_40.yaml
|
codenet_p00496_s700056700_main_12_40.c
|
p00496
|
s700056700
|
main
| 12 | 40 |
codenet
|
C
| 23 | 33 | false |
control_codenet_p00496_s700056700_main_12_40_k_33_3
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include <stdio.h>
2 #include <string.h>
3 #define max(a,b) ((a)>=(b)?(a):(b))
4 int dp[3001][3001];
5 char buf[30], *p;
6 int getint()
7 {
8 int n = 0;
9 while (*p >= '0') n = (n<<3) + (n<<1) + (*p++ & 0xf);
10 return n;
11 }
12 int main()
13 {
14 int a[3001];
15 int b[3001];
16 int n, t, s, i, j, k, ans;
17 fgets(p=buf, 30, stdin);
18 n = getint();
19 p++;
20 t = getint();
21 p++;
22 s = getint();
23 for (i = 1; i <= n; i++) {
24 fgets(p=buf, 30, stdin);
25 a[i] = getint();
26 p++;
27 b[i] = getint();
28 }
29 ans = 0;
30 for (i = 1; i <= n; i++)
31 for (j = 1; j <= t; j++) {
32 dp[i][j] = max(dp[i-1][j], dp[i][j-1]);
33 k = j-b[i];
34 if (k >= 0 && (s <= k || j <= s))
35 dp[i][j] = max(dp[i][j], dp[i-1][k] + a[i]);
36 ans = max(ans, dp[i][j]);
37 }
38 printf("%d\n", ans);
39 return 0;
40 }
```
**Question**: Does line `23` have control dependence over line `33` in function `main`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 23
}
|
{
"line": 33
}
|
codenet_p00496_s700056700_main_12_40.yaml
|
codenet_p00496_s700056700_main_12_40.c
|
p00496
|
s700056700
|
main
| 12 | 40 |
codenet
|
C
| 34 | 33 | false |
control_codenet_p00496_s700056700_main_12_40_k_33_4
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include <stdio.h>
2 #include <string.h>
3 #define max(a,b) ((a)>=(b)?(a):(b))
4 int dp[3001][3001];
5 char buf[30], *p;
6 int getint()
7 {
8 int n = 0;
9 while (*p >= '0') n = (n<<3) + (n<<1) + (*p++ & 0xf);
10 return n;
11 }
12 int main()
13 {
14 int a[3001];
15 int b[3001];
16 int n, t, s, i, j, k, ans;
17 fgets(p=buf, 30, stdin);
18 n = getint();
19 p++;
20 t = getint();
21 p++;
22 s = getint();
23 for (i = 1; i <= n; i++) {
24 fgets(p=buf, 30, stdin);
25 a[i] = getint();
26 p++;
27 b[i] = getint();
28 }
29 ans = 0;
30 for (i = 1; i <= n; i++)
31 for (j = 1; j <= t; j++) {
32 dp[i][j] = max(dp[i-1][j], dp[i][j-1]);
33 k = j-b[i];
34 if (k >= 0 && (s <= k || j <= s))
35 dp[i][j] = max(dp[i][j], dp[i-1][k] + a[i]);
36 ans = max(ans, dp[i][j]);
37 }
38 printf("%d\n", ans);
39 return 0;
40 }
```
**Question**: Does line `34` have control dependence over line `33` in function `main`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 34
}
|
{
"line": 33
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 42 | 50 | true |
control_codenet_p00736_s631138606_F_3_85_fit_50_1
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `42` have control dependence over line `50` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 42
}
|
{
"line": 50
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 41 | 50 | true |
control_codenet_p00736_s631138606_F_3_85_fit_50_2
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `41` have control dependence over line `50` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 41
}
|
{
"line": 50
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 43 | 50 | true |
control_codenet_p00736_s631138606_F_3_85_fit_50_3
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `43` have control dependence over line `50` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 43
}
|
{
"line": 50
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 46 | 50 | true |
control_codenet_p00736_s631138606_F_3_85_fit_50_4
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `46` have control dependence over line `50` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 46
}
|
{
"line": 50
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 34 | 50 | false |
control_codenet_p00736_s631138606_F_3_85_fit_50_5
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `34` have control dependence over line `50` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 34
}
|
{
"line": 50
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 28 | 50 | false |
control_codenet_p00736_s631138606_F_3_85_fit_50_6
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `28` have control dependence over line `50` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 28
}
|
{
"line": 50
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 9 | 50 | false |
control_codenet_p00736_s631138606_F_3_85_fit_50_7
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `9` have control dependence over line `50` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 9
}
|
{
"line": 50
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 19 | 50 | false |
control_codenet_p00736_s631138606_F_3_85_fit_50_8
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `19` have control dependence over line `50` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 19
}
|
{
"line": 50
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 6 | 50 | false |
control_codenet_p00736_s631138606_F_3_85_fit_50_9
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `6` have control dependence over line `50` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 6
}
|
{
"line": 50
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 77 | 78 | true |
control_codenet_p00736_s631138606_F_3_85_fit_78_1
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `77` have control dependence over line `78` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 77
}
|
{
"line": 78
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 66 | 78 | true |
control_codenet_p00736_s631138606_F_3_85_fit_78_2
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `66` have control dependence over line `78` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 66
}
|
{
"line": 78
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 41 | 78 | true |
control_codenet_p00736_s631138606_F_3_85_fit_78_3
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `41` have control dependence over line `78` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 41
}
|
{
"line": 78
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 22 | 78 | false |
control_codenet_p00736_s631138606_F_3_85_fit_78_4
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `22` have control dependence over line `78` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 22
}
|
{
"line": 78
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 43 | 78 | false |
control_codenet_p00736_s631138606_F_3_85_fit_78_5
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `43` have control dependence over line `78` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 43
}
|
{
"line": 78
}
|
codenet_p00736_s631138606_F_3_85.yaml
|
codenet_p00736_s631138606_F_3_85.c
|
p00736
|
s631138606
|
F
| 3 | 85 |
codenet
|
C
| 70 | 78 | false |
control_codenet_p00736_s631138606_F_3_85_fit_78_6
|
[INSTRUCTIONS]
You are a program-analysis assistant. Your task is to statically analyze the control dependence of a given code snippet.
## 1. Control Dependence Definition
Control dependence captures the influence of control-flow decisions on the execution of statements.
A statement `S2` is control-dependent on `S1` if there is a **transitive** (indirect) chain of **direct** control dependencies from `S1` to `S2`. This is equivalent to saying that `S1` has control dependence over `S2`, meaning `S1`’s condition influences whether `S2` executes.
**Direct Control Dependence**:
A statement `S2` is **directly** control-dependent on a statement `S1` if:
1. `S1` is a conditional control statement (e.g., an `if`, `while`, `for`, `switch`, etc.).
2. `S1` directly determines whether `S2` executes. That is, `S1` has multiple successor branches,
- there exists **at least one branch** in which `S2` **always executes**, and
- there exists **at least one other branch** in which `S2` does **not necessarily execute**.
“Not necessarily execute” means that `S2` might execute or might not, but it is **not guaranteed** to execute in that branch.
`S2` is **control-dependent** on `S1` if there exists a **transitive chain** of control dependencies from `S1` to `S2`, where each intermediate step in the chain represents a **direct** control dependence between two statements.
## 2. Output Format
When asked, “Does line `S1` have control dependence over line `S2`? If so, provide a trace.” You should respond in JSON format as follows:
- If there is a control dependence:
```json
{
"ControlDependence": true,
"Trace": [S1, ..., S2]
}
```
- If there is no control dependence:
```json
{
"ControlDependence": false
}
```
A **trace** represents a **transitive control flow**, where each adjacent pair in the list reflects a **direct** control dependence. The trace must starts with `S1` and ends with `S2`.
## 3. Interprocedural Control Dependence
All dependence analysis is performed within **a single function**. We do not track dependencies across function boundaries. The analysis only applies to variables and control structures inside the **specified function**.
## 4. Example Code Snippet
### Example 1
```python
1 if x > 0:
2 y = 10 # this line is directly control-dependent on line 1 (x>0)
3 if y > 5:
4 z = 20 # this line is directly control-dependent on line 3 (y>5)
5 w = 30 # this line is directly control-dependent on line 3 (y>5)
6 v = 40 # this line is NOT control-dependent on any line
```
**Analysis**:
- Line 2 is directly control-dependent on line 1 (`x>0`)
- Lines 4 and 5 are directly control-dependent on line 3 (`y>5`).
- Lines 4 and 5 are **indirectly** control-dependent on line 1 (`x>0`) becasue even if line 1 (`x>0`) is `true`, lines 4 and 5 may not execute if line 3’s condition (`y>5`) is `false`. However, since control dependence is transitive, lines 4 and 5 are **indirectly** control-dependent on line 1.
- Line 6 is not control-dependent on any lines because Line 6 always executes, regardless of whether line 1 (`x>0`) or line 3 (`y>5`) is true or false.
#### Example Question 1.1:
Does line `1` have control dependence over line `5`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [1, 3, 5]
}
```
#### Example Question 1.2:
Does line `3` have control dependence over line `6`? If so, provide a trace.
**Output**:
```json
{
"ControlDependence": false
}
```
### Example 2
```python
1 count = 0
2 if count < 5:
3 count += 1
4 print("Step 1 done")
5 while count < 10:
6 if count == 7:
7 break
8 if count % 2 == 0:
9 continue
10 count += 2
11 if count > 9:
12 count = 9
13 print("Iteration done")
14 print("End of program")
```
#### Example Question 2.1:
Does line `5` have control dependence over line `13`? If so, provide a trace.
**Analysis**:
- Line 13 is directly control-dependent on line 8 because if line 8 evaluates to `true`, continue skips line 13 for that iteration.
- Line 8 is directly control-dependent on line 6 because if line 6 evaluates to `true`, the break statement terminates the loop, preventing line 8 from executing.
- Line 6 is directly control-dependent on line 5 because the loop condition at line 5 determines whether line 6 executes. If line 5 evaluates to `false`, execution skips the loop entirely.
Since control dependence is transitive, line 5 indirectly controls line 13 through lines 6 and 8. The trace is `5->6->8->13`.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [5, 6, 8, 13]
}
```
#### Example Question 2.2:
Does line `8` have control dependence over line `10`? If so, provide a trace.
**Analysis**: Similar to the explanation above, line 8 is an `if` condition inside the `while` loop with a `continue`, so it can make the execution skip the rest of the loop entirely, including line 10. Therefore, line 10 directly control-dependent on 8.
**Output**:
```json
{
"ControlDependence": true,
"Trace": [8, 10]
}
```
#### Example Question 2.3:
Does line `5` have control dependence over line `14`? If so, provide a trace.
**Analysis**: Line 5 doesn't affect whether line 14 is reached. Line 14 is outside the while loop (lines 5 -- 13) and will be executed regardless of the condition.
**Output**:
```json
{
"ControlDependence": false
}
```
#### Example Question 2.4:
Does line `2` have control dependence over line `12`? If so, provide a trace.
**Analysis**: Line 2 doesn't affect whether line 12 is reached. The condition in line 2 only controls whether line 3 is executed. Line 12 is in while loop (line 5 -- 13) and will or will not be executed regardless of the condition in line 2.
**Output**:
```json
{
"ControlDependence": false
}
```
---
[YOUR TURN]
Below is **your target snippet**.
```C
1 #include<stdio.h>
2 #include<string.h>
3 int F(int p,int q,int r,char ft[100],int fc){
4 int fit[100],ic,x,t;
5 ic=1;
6 for(t=0;t<100;t++){
7 fit[t]=0;
8 }
9 while(ic<fc){
10 if(ft[ic]=='P'){
11 fit[ic]=p;
12 }
13 if(ft[ic]=='Q'){
14 fit[ic]=q;
15 }
16 if(ft[ic]=='R'){
17 fit[ic]=r;
18 }
19 if(ft[ic]=='0'){
20 fit[ic]=0;
21 }
22 if(ft[ic]=='1'){
23 fit[ic]=1;
24 }
25 if(ft[ic]=='2'){
26 fit[ic]=2;
27 }
28 if(ft[ic]=='+'){
29 fit[ic]=3;
30 }
31 if(ft[ic]=='-'){
32 fit[ic]=4;
33 }
34 if(ft[ic]=='*'){
35 fit[ic]=5;
36 }
37 ic++;
38 }
39 ic--;
40 x=1;
41 while(x<ic){
42 if(fit[x]==3){
43 if(fit[x-1]==0&&fit[x-2]==0){
44 fit[x-2]=0;
45 }
46 else if(fit[x-1]==2||fit[x-2]==2){
47 fit[x-2]=2;
48 }
49 else{
50 fit[x-2]=1;
51 }
52 ic-=2;
53 for(t=x-1;t<=ic;t++){
54 fit[t]=fit[t+2];
55 }
56 x-=2;
57 }
58 if(fit[x]==4){
59 fit[x-1]=2-fit[x-1];
60 ic--;
61 for(t=x;t<=ic;t++){
62 fit[t]=fit[t+1];
63 }
64 x--;
65 }
66 if(fit[x]==5){
67 if(fit[x-1]==0||fit[x-2]==0){
68 fit[x-2]=0;
69 }
70 else if(fit[x-1]==2&&fit[x-2]==2){
71 fit[x-2]=2;
72 }
73 else{
74 fit[x-2]=1;
75 }
76 ic-=2;
77 for(t=x-1;t<=ic;t++){
78 fit[t]=fit[t+2];
79 }
80 x-=2;
81 }
82 x++;
83 }
84 return fit[1];
85 }
86 int main(void){
87 int c,nc,oc,fc;
88 char txt[100],ng[100],op[100],ft[100];
89 while(1){
90 scanf("%s",&txt);
91 if(txt[0]=='.'){
92 break;
93 }
94 nc=oc=fc=0;
95 for(c=0;c<strlen(txt);c++){
96 if(txt[c]==0||txt[c]==1||txt[c]==2||txt[c]=='P'||txt[c]=='Q'||txt[c]=='R'){
97 fc++;
98 ft[fc]=txt[c];
99 if(nc!=0){
100 while(nc!=0){
101 fc++;
102 ft[fc]=ng[nc];
103 nc--;
104 }
105 }
106 }
107 if(txt[c]=='+'){
108 if(oc==0||op[oc]=='('){
109 oc++;
110 op[oc]=txt[c];
111 }
112 else{
113 while(oc!=0){
114 fc++;
115 ft[fc]=op[oc];
116 oc--;
117 }
118 oc++;
119 op[oc]=txt[c];
120 }
121 }
122 if(txt[c]=='*'){
123 if(oc==0||op[oc]=='+'||op[oc]=='('){
124 oc++;
125 op[oc]=txt[c];
126 }
127 else{
128 while(oc!=0){
129 fc++;
130 ft[fc]=op[oc];
131 oc--;
132 }
133 oc++;
134 op[oc]=txt[c];
135 }
136 }
137 if(txt[c]=='('){
138 oc++;
139 op[oc]=txt[c];
140 }
141 if(txt[c]==')'){
142 while(op[oc]!='('){
143 fc++;
144 ft[fc]=op[oc];
145 oc--;
146 }
147 op[oc]=0;
148 oc--;
149 }
150 if(txt[c]=='-'){
151 nc++;
152 ng[nc]=txt[c];
153 }
154 }
155 if(oc!=0){
156 while(oc!=0){
157 fc++;
158 ft[fc]=op[oc];
159 oc--;
160 }
161 }
162 for(c=1;c<=fc;c++){
163 printf("%c",ft[c]);
164 }
165 printf("\n");
166 for(c=0;c<100;c++){
167 ng[c]=op[c]=0;
168 }
169 int p,q,r,ans;
170 ans=0;
171 for(p=0;p<3;p++){
172 for(q=0;q<3;q++){
173 for(r=0;r<3;r++){
174 if(F(p,q,r,ft,fc)==2){
175 ans++;
176 }
177 }
178 }
179 }
180 printf("%d\n",ans);
181 }
182 return 0;
183 }
```
**Question**: Does line `70` have control dependence over line `78` in function `F`? If so, provide a trace.
**Output**:
|
trace
|
{
"line": 70
}
|
{
"line": 78
}
|
End of preview.
CoRe: Benchmarking LLMs’ Code Reasoning Capabilities through Static Analysis Tasks
This repository hosts the CoRe benchmark, designed to evaluate the reasoning capabilities of large language models on program analysis tasks including data dependency, control dependency, and information flow. Each task instance is represented as a structured JSON object with detailed metadata for evaluation and reproduction.
It contains 25k data points (last update: Sep. 24th, 2025).
Each example is a JSON object with the following fields:
{
"label_file": "codenet_p00496_s700056700_main_12_40.yaml",
"code_file": "codenet_p00496_s700056700_main_12_40.c",
"pid": "p00496",
"sid": "s700056700",
"funname": "main",
"start": 12,
"end": 40,
"dataset": "codenet",
"language": "C",
"src": 30,
"dst": 33,
"groundtruth": true,
"task_id": "control_codenet_p00496_s700056700_main_12_40_k_33_1",
"prompt": "..."
"category": trace/all_source
}
🏷 Category Field
The category field specifies the type of prompt associated with each task instance:
- trace: The prompt asks the model to produce a dependency trace if the answer is
yes(e.g., the control or data dependency exists). - all_source: The prompt asks the model to enumerate all source elements involved in the dependency.
🧩 Field Descriptions
| Field | Description |
|---|---|
label_file |
Path to the YAML file containing ground truth annotations for the current task instance. |
code_file |
Path to the corresponding C/Java/Python source code file. |
pid |
Problem ID from the original source dataset (e.g., CodeNet or GCJ). |
sid |
Solution ID identifying the specific program implementation. |
funname |
Name of the target function in which the analysis is conducted. |
start, end |
Line numbers defining the start and end of the target function. |
dataset |
Original dataset source (codenet or gcj). |
language |
Programming language of the source file (C, Java, Python). |
src, dst |
Defines the two program elements queried in this task. In control dependency, these are line numbers. In data dependency and information flow, they are structured as ["varname", line_no], representing variable instances. |
groundtruth |
Boolean indicating whether the specified dependency relationship holds (i.e., true if src has the given dependency on dst). |
task_id |
A unique ID for the task instance. The prefix (control_, data_, infoflow_) identifies the task type. |
prompt |
The prompt string used in the experiment for this task instance. It includes the instruction, examples, query, and code context provided to the LLM. Content-specific fields (e.g., source/target names, line numbers) are filled into a standardized prompt template. |
📚 Task Types
The benchmark contains three types of program reasoning tasks:
control: Control dependency between lines.data: Data dependency between variables.infoflow: Information flow (explicit or implicit) between variables.
Each instance is designed to assess whether an LLM can understand and reason over static semantics in real-world source code.
🛠 Scripts and Usage
For scripts, evaluation tools, and detailed instructions on running inference over CoRe, please check out our companion GitHub repository:
🔗 Website: https://corebench.github.io/
🔗 Source code: https://github.com/CoReBench/CoRe
🔗 Paper: https://arxiv.org/abs/2507.05269
The github repo includes:
- Raw annotation data that could be used to generate various static analysis tasks
- Predefined prompts for each task and language
- Scripts for invoking models and parsing responses
- Evaluation scripts for dependency classification, trace generation, and dependency source enumeration
📄 License
Apache License 2.0
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