iter = 0, Function value -0.330579, Residual: 0.728961 
iter = 1, Function value -0.391218, Residual: 0.386209 
iter = 2, Function value -0.416588, Residual: 0.230730 
iter = 3, Function value -0.42493, Residual: 0.115781 
iter = 4, Function value -0.426883, Residual: 0.043859 
iter = 5, Function value -0.427697, Residual: 0.014313 
iter = 6, Function value -0.427738, Residual: 0.005545 
