petsc-3.6.1 2015-08-06iter = 0, Function value: 1, Residual: 2 iter = 1, Function value: 0.773446, Residual: 6.07754 iter = 2, Function value: 0.648599, Residual: 3.22619 iter = 3, Function value: 0.560405, Residual: 5.47111 iter = 4, Function value: 0.379185, Residual: 3.01163 iter = 5, Function value: 0.280758, Residual: 2.6864 iter = 6, Function value: 0.187322, Residual: 3.78999 iter = 7, Function value: 0.129225, Residual: 6.25728 iter = 8, Function value: 0.10936, Residual: 0.457052 iter = 9, Function value: 0.0850793, Residual: 0.9475 iter = 10, Function value: 0.0601238, Residual: 3.23463 iter = 11, Function value: 0.0405988, Residual: 3.6698 iter = 12, Function value: 0.0184967, Residual: 1.7436 iter = 13, Function value: 0.00898914, Residual: 0.107259 iter = 14, Function value: 0.00553533, Residual: 1.48455 iter = 15, Function value: 0.00353862, Residual: 1.42651 iter = 16, Function value: 0.000594656, Residual: 0.176892 iter = 17, Function value: 0.000129296, Residual: 0.425951 iter = 18, Function value: 5.17587e-06, Residual: 0.0681965 iter = 19, Function value: 3.43742e-08, Residual: 0.00754746 Tao Object: 1 MPI processes type: lmvm BFGS steps: 37 Scaled gradient steps: 1 Gradient steps: 0 TaoLineSearch Object: 1 MPI processes type: more-thuente convergence tolerances: fatol=0.0001, frtol=0.0001 convergence tolerances: gatol=1e-08, steptol=0, gttol=0 Residual in Function/Gradient:=0.00754746 Objective value=3.43742e-08 total number of iterations=19, (max: 2000) total number of function/gradient evaluations=26, (max: 4000) Solution converged: estimated f(x)-f(X*) <= fatol