petsc-3.6.1 2015-08-06iter = 0, Function value: 1, Residual: 2 iter = 1, Function value: 0.773447, Residual: 6.07756 iter = 2, Function value: 0.722796, Residual: 10.3789 iter = 3, Function value: 0.523703, Residual: 2.09909 iter = 4, Function value: 0.510953, Residual: 1.34212 iter = 5, Function value: 0.000545219, Residual: 0.386411 iter = 6, Function value: 0.000472329, Residual: 0.0219345 iter = 7, Function value: 0.000471362, Residual: 0.0387358 iter = 8, Function value: 2.82969e-05, Residual: 0.139079 iter = 9, Function value: 1.86055e-05, Residual: 0.0038741 Tao Object: 1 MPI processes type: cg CG Type: prp Gradient steps: 0 Reset 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:=0.0038741 Objective value=1.86055e-05 total number of iterations=9, (max: 2000) total number of function/gradient evaluations=128, (max: 4000) Solution converged: estimated f(x)-f(X*) <= fatol