What does this output really mean? Why does a converged Newton iteration still lead to a diverged SNES solve?
C:\cygwin\home\rabbit\pGFEM-test>pgfem -ksp_monitor atol=1e-050, rtol=1e-008, stol=1e-008, maxit=50, maxf=10000 0 KSP Residual norm 1.526322665926e-001 1 KSP Residual norm 1.664108108313e-003 2 KSP Residual norm 9.234526593231e-006 3 KSP Residual norm 7.035003988413e-008 0 KSP Residual norm 1.372225675693e-001 1 KSP Residual norm 1.955889208728e-003 2 KSP Residual norm 6.925412512315e-006 3 KSP Residual norm 1.652845110783e-008 0 KSP Residual norm 1.233183603661e-001 1 KSP Residual norm 1.751093239951e-003 2 KSP Residual norm 6.124066396591e-006 3 KSP Residual norm 1.431288831469e-008 C:\cygwin\home\rabbit\pGFEM-test>pgfem -ksp_monitor -snes_monitor atol=1e-050, rtol=1e-008, stol=1e-008, maxit=50, maxf=10000 0 SNES Function norm 1.000000000000e+002 0 KSP Residual norm 1.526322665926e-001 1 KSP Residual norm 1.664108108313e-003 2 KSP Residual norm 9.234526593231e-006 3 KSP Residual norm 7.035003988413e-008 1 SNES Function norm 9.112654908737e+001 0 KSP Residual norm 1.372225675693e-001 1 KSP Residual norm 1.955889208728e-003 2 KSP Residual norm 6.925412512315e-006 3 KSP Residual norm 1.652845110783e-008 2 SNES Function norm 8.914492398201e+001 0 KSP Residual norm 1.233183603661e-001 1 KSP Residual norm 1.751093239951e-003 2 KSP Residual norm 6.124066396591e-006 3 KSP Residual norm 1.431288831469e-008 3 SNES Function norm 8.937681381791e+001 STEP 0 (Newton iterations: 3) diverged reason: -6 --Rong
