0 TAO,  Function value: 14.6462,  Residual: 14.2702 
    Residual norms for tao_nls_ solve.
    0 KSP Residual norm 1.427015511678e+01 
    1 KSP Residual norm 1.396273990439e+00 
    2 KSP Residual norm 2.213188246184e-01 
    3 KSP Residual norm 2.647735033262e-02 
    4 KSP Residual norm 3.359440493040e-03 
    5 KSP Residual norm 4.722075176094e-04 
    6 KSP Residual norm 5.297131808121e-05 
  1 TAO,  Function value: 4.22724,  Residual: 5.29713e-05 
    Residual norms for tao_nls_ solve.
    0 KSP Residual norm 5.297131808148e-05 
    1 KSP Residual norm 1.309917707050e-05 
    2 KSP Residual norm 1.593114810411e-06 
    3 KSP Residual norm 1.978114251259e-07 
    4 KSP Residual norm 3.337904061389e-08 
    5 KSP Residual norm 4.448881619430e-09 
    6 KSP Residual norm 1.038506813766e-09 
    7 KSP Residual norm 1.330913676293e-10 
  2 TAO,  Function value: 4.22724,  Residual: 1.33091e-10 
J(xhat): 98.3926, predicted: 4.22724, diff 94.1653
J(xhat): 27.7686, predicted: 4.22724, diff 23.5413
J(xhat): 10.1126, predicted: 4.22724, diff 5.88533
J(xhat): 5.69858, predicted: 4.22724, diff 1.47133
J(xhat): 4.59508, predicted: 4.22724, diff 0.367833
J(xhat): 4.3192, predicted: 4.22724, diff 0.0919583
J(xhat): 4.25023, predicted: 4.22724, diff 0.0229896
J(xhat): 4.23299, predicted: 4.22724, diff 0.0057474
J(xhat): 4.22868, predicted: 4.22724, diff 0.00143685
J(xhat): 4.2276, predicted: 4.22724, diff 0.000359212
Convergence rate step 0: 2.
Convergence rate step 1: 2.
Convergence rate step 2: 2.
Convergence rate step 3: 2.
Convergence rate step 4: 2.
Convergence rate step 5: 2.
Convergence rate step 6: 2.
Convergence rate step 7: 2.
Convergence rate step 8: 2.