Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Variability Fault Localization Approach for Software Product Lines   Software fault localization is one of the most expensive, tedious, and
time-consuming activities in program debugging. This activity becomes even much
more challenging in Software Product Line (SPL) systems due to variability of
failures. These unexpected behaviors are induced by variability faults which
can only be exposed under some combinations of system features. The interaction
among these features causes the failures of the system. Although localizing
bugs in single-system engineering has been studied in-depth, variability fault
localization in SPL systems still remains mostly unexplored. In this article,
we present VarCop, a novel and effective variability fault localization
approach. For an SPL system failed by variability bugs, VarCop isolates
suspicious code statements by analyzing the overall test results of the sampled
products and their source code. The isolated suspicious statements are the
statements related to the interaction among the features which are necessary
for the visibility of the bugs in the system. The suspiciousness of each
isolated statement is assessed based on both the overall test results of the
products containing the statement as well as the detailed results of the test
cases executed by the statement in these products. On a large dataset of buggy
SPL systems, empirical evaluation shows that VarCop significantly improves two
state-of-the-art fault localization techniques by 33% and 50% in ranking the
incorrect statements in the systems containing a single bug each. In about
two-thirds of the cases, VarCop ranks the buggy statements at the top-3
positions in the resulting lists. For multiple-bug cases, VarCop outperforms
the state-of-the-art approaches 2 times and 10 times in the proportion of bugs
localized at the top-1 positions. In 22% and 65% of the buggy versions, VarCop
correctly ranks at least one bug in a system at the top-1 and top-5 positions.

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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: cond-mat