1 0 TAO, Function value: 0.155766, Residual: 1.23421 2 0 TAO, Function value: 0.0322952, Residual: 0.727598 3 1 TAO, Function value: 0.0139605, Residual: 0.773901 4 2 TAO, Function value: 0.00073508, Residual: 0.151866 5 3 TAO, Function value: 2.37601e-06, Residual: 0.00829695 6 4 TAO, Function value: 3.36305e-11, Residual: 3.1135e-05 7 5 TAO, Function value: 6.78053e-21, Residual: 4.42089e-10 8Tao Object: 1 MPI process 9 type: bntr 10 Tao Object: (tao_bnk_cg_) 1 MPI process 11 type: bncg 12 CG Type: ssml_bfgs 13 Skipped Stepdirection Updates: 0 14 Scaled gradient steps: 0 15 Pure gradient steps: 0 16 Not a descent direction: 0 17 Line search fails: 0 18 Matrix has not been preallocated yet 19 TaoLineSearch Object: (tao_bnk_cg_) 1 MPI process 20 type: more-thuente 21 maximum function evaluations=30 22 tolerances: ftol=0.0001, rtol=1e-10, gtol=0.9 23 total number of function evaluations=0 24 total number of gradient evaluations=0 25 total number of function/gradient evaluations=0 26 Termination reason: CONTINUE_ITERATING 27 convergence tolerances: gatol=1e-08, grtol=1e-08, steptol=0., gttol=0. 28 Residual in Function/Gradient:=0. 29 Objective value=0. 30 total number of iterations=0, (max: 2000) 31 Solver never run 32 CG steps: 0 33 Newton steps: 5 34 Scaled gradient steps: 0 35 Gradient steps: 0 36 KSP termination reasons: 37 atol: 0 38 rtol: 2 39 ctol: 1 40 negc: 2 41 dtol: 0 42 iter: 0 43 othr: 0 44 TaoLineSearch Object: 1 MPI process 45 type: more-thuente 46 maximum function evaluations=30 47 tolerances: ftol=0.0001, rtol=1e-10, gtol=0.9 48 total number of function evaluations=0 49 total number of gradient evaluations=0 50 total number of function/gradient evaluations=0 51 Termination reason: CONTINUE_ITERATING 52 KSP Object: (tao_bnk_) 1 MPI process 53 type: stcg 54 maximum iterations=10000, initial guess is zero 55 tolerances: relative=1e-05, absolute=1e-50, divergence=10000. 56 left preconditioning 57 using UNPRECONDITIONED norm type for convergence test 58 PC Object: (tao_bnk_) 1 MPI process 59 type: none 60 linear system matrix, which is also used to construct the preconditioner: 61 Mat Object: 1 MPI process 62 type: shell 63 rows=2, cols=2 64 total KSP iterations: 8 65 convergence tolerances: gatol=1e-08, grtol=1e-08, steptol=0., gttol=0. 66 Residual in Function/Gradient:=4.42089e-10 67 Objective value=6.78053e-21 68 total number of iterations=5, (max: 50) 69 total number of function/gradient evaluations=17, (max: unlimited) 70 total number of Hessian evaluations=6 71 Solution converged: ||g(X)|| <= gatol 72