On May 6, 2023, at 6:24 PM, Jorti, Zakariae via petsc-users <[email protected]> wrote:
Hello, I have a time-dependent model that I solve using TSSolve. And I am trying to adaptively change the step size (dt). I found that there are some TSAdapt schemes already available. I have tried TSADAPTBASIC and TSADAPTCFL. The former runs without any problems, whereas the latter yields the following error: " [0]PETSC ERROR: --------------------- Error Message -------------------------------------------------------------- [0]PETSC ERROR: No support for this operation for this object type [0]PETSC ERROR: Step rejection not implemented. The CFL implementation is incomplete/unusable " How/where the step rejection should be implemented? Are there any examples available? I think you need to compute the local step size based on CFL for Euler and set it with TSSetCFLTimeLocal<https://petsc.org/main/manualpages/TS/TSSetCFLTimeLocal/>(). Besides, I was also attempting to change the step size through the monitor: " SNES snes; TSGetSNES(ts, & snes); SNESConvergedReason reason = SNES_CONVERGED_ITERATING; PetscCall(SNESGetConvergedReason(snes, &reason)); if(reason < 0){ TSSetTimeStep(ts,28618.7); } else{ TSSetTimeStep(ts,57237.4); } " But when I try this solution, the TSStep seems to diverge even though the SNES solver converges (see log file below). Am I doing something wrong here by changing the value of the step size inside the monitor? TS usually checks convergence based on local truncation errors, not on whether SNES converges. It seems that a built-in TS adaptor is being used but you are overwriting the step size chosen by the adaptor. You can add -ts_adapt_type none to turn off the TS adaptor and control the step size by yourself. Alternatively, you can use the TS adaptor and tune the scaling factors with TSAdaptSetClip<https://petsc.org/main/manualpages/TS/TSAdaptSetClip/>(). Hong (Mr.) Thank you. Best, Zakariae ----------------------------------------------------------------- Timestep 0: step size = 57237.4, time = 0., 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 8.393431982129e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.985106864162e-01 1 KSP Residual norm 2.509248490095e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 1.985106864162e-01 0 KSP Residual norm 1.985106864162e-01 1 KSP Residual norm 2.739697200542e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.885623182909e-01 1 KSP Residual norm 8.784869181255e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.664114929279e-01 1 KSP Residual norm 2.277701872167e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 1.664114929279e-01 0 KSP Residual norm 1.664114929279e-01 1 KSP Residual norm 2.062369048201e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 6.155996487462e-02 1 KSP Residual norm 8.830688649637e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 3 SNES Function norm 6.155996487462e-02 0 KSP Residual norm 6.155996487462e-02 1 KSP Residual norm 6.231091742747e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.828806540636e-02 1 KSP Residual norm 3.623270770725e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 4 SNES Function norm 1.828806540636e-02 0 KSP Residual norm 1.828806540636e-02 1 KSP Residual norm 7.390325185746e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.659571588896e-02 1 KSP Residual norm 5.280284947190e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 5 SNES Function norm 1.659571588896e-02 0 KSP Residual norm 1.659571588896e-02 1 KSP Residual norm 8.311611006756e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.475636107890e-02 1 KSP Residual norm 1.890387034462e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.635129206894e-02 1 KSP Residual norm 8.192897103059e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 6 SNES Function norm 1.635129206894e-02 0 KSP Residual norm 1.635129206894e-02 1 KSP Residual norm 9.049749505225e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.634946381608e-02 1 KSP Residual norm 9.038879304284e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.635085731721e-02 1 KSP Residual norm 9.050535714933e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 7 SNES Function norm 1.635085731721e-02 0 KSP Residual norm 1.635085731721e-02 1 KSP Residual norm 1.248783858778e-03 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.635003937816e-02 1 KSP Residual norm 1.248746884526e-03 Linear solve converged due to CONVERGED_RTOL iterations 1 8 SNES Function norm 1.635003937816e-02 0 KSP Residual norm 1.635003937816e-02 1 KSP Residual norm 1.631242803481e-02 2 KSP Residual norm 1.551854905139e-02 3 KSP Residual norm 7.586491369138e-03 4 KSP Residual norm 2.304721992110e-04 Linear solve converged due to CONVERGED_RTOL iterations 4 0 KSP Residual norm 1.635003936717e-02 1 KSP Residual norm 1.631242801091e-02 2 KSP Residual norm 1.551784322549e-02 3 KSP Residual norm 7.706018759197e-03 4 KSP Residual norm 2.652435205967e-04 Linear solve converged due to CONVERGED_RTOL iterations 4 9 SNES Function norm 1.282692400720e+06 Nonlinear solve did not converge due to DIVERGED_DTOL iterations 9 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 5.698410682663e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 8.618385788411e-02 1 KSP Residual norm 9.179214337527e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 8.618385788411e-02 0 KSP Residual norm 8.618385788411e-02 1 KSP Residual norm 9.659611612697e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.763975792565e-02 1 KSP Residual norm 2.674728432525e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 2.763975792565e-02 0 KSP Residual norm 2.763975792565e-02 1 KSP Residual norm 1.836844517206e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.773540750989e-03 1 KSP Residual norm 1.340353004310e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 3 SNES Function norm 2.773540750989e-03 0 KSP Residual norm 2.773540750989e-03 1 KSP Residual norm 5.382019472069e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 3.441017533038e-04 1 KSP Residual norm 5.218147408275e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 4 SNES Function norm 3.441017533038e-04 0 KSP Residual norm 3.441017533038e-04 1 KSP Residual norm 4.811955757758e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 3.991606932979e-06 1 KSP Residual norm 8.670005394864e-09 Linear solve converged due to CONVERGED_RTOL iterations 1 5 SNES Function norm 3.991606932979e-06 0 KSP Residual norm 3.991606932979e-06 1 KSP Residual norm 8.920137762569e-09 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 7.982782045945e-10 1 KSP Residual norm 3.185856555648e-12 Linear solve converged due to CONVERGED_RTOL iterations 1 6 SNES Function norm 7.982782045945e-10 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 6 0 SNES Function norm 3.475518085003e-04 0 KSP Residual norm 3.475518085003e-04 1 KSP Residual norm 2.328087365783e-04 2 KSP Residual norm 5.062641920970e-09 Linear solve converged due to CONVERGED_RTOL iterations 2 0 KSP Residual norm 3.256441726122e-02 1 KSP Residual norm 8.957860841275e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 3.256441726122e-02 0 KSP Residual norm 3.256441726122e-02 1 KSP Residual norm 5.886144296665e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 4.876417342600e-03 1 KSP Residual norm 5.064113356579e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 4.876417342600e-03 0 KSP Residual norm 4.876417342600e-03 1 KSP Residual norm 7.010281488349e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 6.144574635801e-04 1 KSP Residual norm 9.768499579865e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 3 SNES Function norm 6.144574635801e-04 0 KSP Residual norm 6.144574635801e-04 1 KSP Residual norm 8.324370478600e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 8.721913471286e-06 1 KSP Residual norm 1.370545428753e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 4 SNES Function norm 8.721913471286e-06 0 KSP Residual norm 8.721913471286e-06 1 KSP Residual norm 1.353680905072e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 3.399977638261e-09 1 KSP Residual norm 5.989016835446e-12 Linear solve converged due to CONVERGED_RTOL iterations 1 5 SNES Function norm 3.399977638261e-09 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 5 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 1.733028652796e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 7.490800616133e-03 1 KSP Residual norm 8.231034393757e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 7.490800616133e-03 0 KSP Residual norm 7.490800616133e-03 1 KSP Residual norm 8.349300836114e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.394207859364e-04 1 KSP Residual norm 5.991798196295e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 1.394207859364e-04 0 KSP Residual norm 1.394207859364e-04 1 KSP Residual norm 5.941984242417e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.985895331367e-08 1 KSP Residual norm 1.522240176483e-11 Linear solve converged due to CONVERGED_RTOL iterations 1 3 SNES Function norm 2.985895331367e-08 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 3 0 SNES Function norm 1.026110861069e-03 0 KSP Residual norm 1.026110861069e-03 1 KSP Residual norm 1.768297003974e-04 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 7.742520550463e-03 1 KSP Residual norm 4.379214132544e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 7.742520550463e-03 0 KSP Residual norm 7.742520550463e-03 1 KSP Residual norm 4.526371657285e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.574467856482e-05 1 KSP Residual norm 2.285626422848e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 2.574467856482e-05 0 KSP Residual norm 2.574467856482e-05 1 KSP Residual norm 2.274220735999e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 4.797870687759e-09 1 KSP Residual norm 2.841037171618e-12 Linear solve converged due to CONVERGED_RTOL iterations 1 3 SNES Function norm 4.797870687759e-09 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 3 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 5.979305049211e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 8.195748548281e-04 1 KSP Residual norm 1.017772307359e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 8.195748548281e-04 0 KSP Residual norm 8.195748548281e-04 1 KSP Residual norm 1.026961867317e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.717269750886e-06 1 KSP Residual norm 4.675717893044e-10 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 1.717269750886e-06 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 1.325295461903e-03 0 KSP Residual norm 1.325295461903e-03 1 KSP Residual norm 7.421950279125e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.330639207844e-03 1 KSP Residual norm 3.764830059967e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 1.330639207844e-03 0 KSP Residual norm 1.330639207844e-03 1 KSP Residual norm 3.764587772248e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.146996236879e-07 1 KSP Residual norm 1.459926588396e-10 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 2.146996236879e-07 0 KSP Residual norm 2.146996236879e-07 1 KSP Residual norm 1.470407475325e-10 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.171052440924e-11 1 KSP Residual norm 1.397958787200e-15 Linear solve converged due to CONVERGED_RTOL iterations 1 3 SNES Function norm 2.171052440924e-11 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 3 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 3.067250018894e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.608120509564e-04 1 KSP Residual norm 2.171575389779e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 1.608120509564e-04 0 KSP Residual norm 1.608120509564e-04 1 KSP Residual norm 2.240227170220e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 9.106906778906e-08 1 KSP Residual norm 1.799636201836e-11 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 9.106906778906e-08 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 1.418151440967e-03 0 KSP Residual norm 1.418151440967e-03 1 KSP Residual norm 3.515151918636e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.938727941997e-04 1 KSP Residual norm 6.040565904176e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 2.938727941997e-04 0 KSP Residual norm 2.938727941997e-04 1 KSP Residual norm 6.089297895562e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.093551284505e-08 1 KSP Residual norm 2.891462873664e-12 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 1.093551284505e-08 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 2.050867218313e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 3.054570961709e-05 1 KSP Residual norm 4.596885059357e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 3.054570961709e-05 0 KSP Residual norm 3.054570961709e-05 1 KSP Residual norm 4.828909801995e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.248104282690e-08 1 KSP Residual norm 8.831951540120e-13 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 1.248104282690e-08 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 1.460190420374e-03 0 KSP Residual norm 1.460190420374e-03 1 KSP Residual norm 1.580519450452e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 5.884986293527e-05 1 KSP Residual norm 9.020937669734e-09 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 5.884986293527e-05 0 KSP Residual norm 5.884986293527e-05 1 KSP Residual norm 9.054367061995e-09 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.698647259662e-09 1 KSP Residual norm 1.767366286599e-13 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 1.698647259662e-09 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 1.834492501580e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 5.663374849972e-06 1 KSP Residual norm 9.752865227095e-09 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 5.663374849972e-06 0 KSP Residual norm 5.663374849972e-06 1 KSP Residual norm 1.014567990183e-08 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.600155584863e-09 1 KSP Residual norm 8.580477366667e-14 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 2.600155584863e-09 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 1.479145244919e-03 0 KSP Residual norm 1.479145244919e-03 1 KSP Residual norm 6.804553002336e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.118291636442e-05 1 KSP Residual norm 1.397149309582e-09 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 1.118291636442e-05 0 KSP Residual norm 1.118291636442e-05 1 KSP Residual norm 1.386385106529e-09 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.800461695540e-10 1 KSP Residual norm 3.217319587127e-14 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 2.800461695540e-10 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 1.776151497065e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.076105708636e-06 1 KSP Residual norm 2.155085223926e-09 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 1.076105708636e-06 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 1 0 SNES Function norm 1.489507915803e-03 0 KSP Residual norm 1.489507915803e-03 1 KSP Residual norm 2.921538148329e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.172405782412e-06 1 KSP Residual norm 2.719699969205e-10 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 2.172405782412e-06 0 KSP Residual norm 2.172405782412e-06 1 KSP Residual norm 2.731813669182e-10 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 5.323734019212e-11 1 KSP Residual norm 6.095298326433e-15 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 5.323734019212e-11 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 1.746846293829e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.376406135686e-07 1 KSP Residual norm 5.310287317591e-10 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 2.376406135686e-07 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 1 0 SNES Function norm 1.497239199277e-03 0 KSP Residual norm 1.497239199277e-03 1 KSP Residual norm 1.251830706962e-06 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 5.023668872625e-07 1 KSP Residual norm 7.656373075632e-11 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 5.023668872625e-07 0 KSP Residual norm 5.023668872625e-07 1 KSP Residual norm 7.473091471413e-11 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.003331377435e-11 1 KSP Residual norm 1.347408932811e-15 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 2.003331377435e-11 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 1.757419385096e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 7.310279661922e-08 1 KSP Residual norm 1.417918576189e-10 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 7.310279661922e-08 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 1 0 SNES Function norm 1.503392083665e-03 0 KSP Residual norm 1.503392083665e-03 1 KSP Residual norm 5.327548050375e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.611770751552e-07 1 KSP Residual norm 2.611036263545e-11 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 1.611770751552e-07 0 KSP Residual norm 1.611770751552e-07 1 KSP Residual norm 2.607692240234e-11 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 1.627978707015e-11 1 KSP Residual norm 4.254078683385e-16 Linear solve converged due to CONVERGED_RTOL iterations 1 2 SNES Function norm 1.627978707015e-11 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 2 0 SNES Function norm 2.854104379157e-02 0 KSP Residual norm 2.854104379157e-02 1 KSP Residual norm 1.747957348554e-05 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 2.999731614900e-08 1 KSP Residual norm 3.643836796648e-11 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 2.999731614900e-08 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 1 0 SNES Function norm 1.507740473908e-03 0 KSP Residual norm 1.507740473908e-03 1 KSP Residual norm 2.263876724496e-07 Linear solve converged due to CONVERGED_RTOL iterations 1 0 KSP Residual norm 6.390049329095e-08 1 KSP Residual norm 9.745723464126e-12 Linear solve converged due to CONVERGED_RTOL iterations 1 1 SNES Function norm 6.390049329095e-08 Nonlinear solve converged due to CONVERGED_FNORM_RELATIVE iterations 1 [0]PETSC ERROR: --------------------- Error Message -------------------------------------------------------------- [0]PETSC ERROR: TSStep has failed due to DIVERGED_STEP_REJECTED
