||_infty = 1.76e-01
Iter   110, f(x) = 3.932266e+01, ||grad||_infty = 1.61e-01
Iter   120, f(x) = 3.931633e+01, ||grad||_infty = 2.04e-01
Iter   130, f(x) = 3.931059e+01, ||grad||_infty = 2.72e-01
Iter   140, f(x) = 3.930927e+01, ||grad||_infty = 2.68e-01
Iter   150, f(x) = 3.930873e+01, ||grad||_infty = 2.33e-01
Iter   160, f(x) = 3.930837e+01, ||grad||_infty = 1.91e-01
Iter   170, f(x) = 3.930823e+01, ||grad||_infty = 1.91e-01
Iter   180, f(x) = 3.930818e+01, ||grad||_infty = 1.87e-01
Iter   190, f(x) = 3