 1.94e-01
Iter   390, f(x) = 5.862826e+02, ||grad||_infty = 2.97e-01
Iter   400, f(x) = 5.862708e+02, ||grad||_infty = 1.20e-01
Iter   410, f(x) = 5.862519e+02, ||grad||_infty = 4.23e-01
Iter   420, f(x) = 5.862373e+02, ||grad||_infty = 1.72e-01
Iter   430, f(x) = 5.862314e+02, ||grad||_infty = 4.63e-01
Iter   440, f(x) = 5.862213e+02, ||grad||_infty = 9.90e-02
Iter   450, f(x) = 5.862163e+02, ||grad||_infty = 6.01e-01
Iter   460, f(x) = 5.862098e+02, ||grad||_infty = 1.04e-01
Iter   470, f(x) = 5.862055e+0