[petsc-users] TS generating inconsistent data

[Zhang, Hong]

Zane,

Stefano’s suggestion should have fixed your code. I just want to let you know that it is not a requirement to call TSResetTrajectory() and there are other ways to fix your problem.

Based on my experience, you might have called TSSaveTrajectory() in an unnecessary place, for example,
  TSSaveTrajectory()
  TSSolve() /* generate a reference solution or for some other purpose */
  { /* optimization loop */
    TSSolve() /* forward run for sensitivity calculation */
    TSAdjointSolve() /* backward run for sensitivity calculation */
  }
Here, the first call to TSSolve() actually does not need the trajectory data. You can easily fix the ‘inconsistent data’ error by doing
  TSSolve() /* generate a reference solution or for some other purpose */
  TSSaveTrajectory()
  { /* optimization loop */
    TSSolve() /* forward run for sensitivity calculation */
    TSAdjointSolve() /* backward run for sensitivity calculation */
  }

Alternatively, you can use the command line option -ts_trajectory_use_history 0 (you need to call TSSetFromOptions() after TSSaveTrajectory() to receive the TSTrajectory options).

Hong (Mr.)

On Mar 14, 2020, at 10:54 AM, Zane Charles Jakobs <Zane.Jakobs at colorado.edu<mailto:Zane.Jakobs at colorado.edu>> wrote:

Hi PETSc devs,

I have some code that implements (essentially) 4D-VAR with PETSc, and the results of both my forward and adjoint integrations look correct to me (i.e. calling TSSolve() and then TSAdjointSolve() works correctly as far as I can tell). However, when I try to use a TaoSolve() to optimize my initial condition, I get this error message:

[0]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------
[0]PETSC ERROR: Petsc has generated inconsistent data
[0]PETSC ERROR: History id should be unique
[0]PETSC ERROR: See https://www.mcs.anl.gov/petsc/documentation/faq.html for trouble shooting.
[0]PETSC ERROR: Petsc Development GIT revision: v3.12.4-783-g88ddbcab12  GIT Date: 2020-02-21 16:53:25 -0600
[0]PETSC ERROR: ./var_ic_test on a arch-linux2-c-debug named DiffeoInvariant by diffeoinvariant Sat Mar 14 09:39:05 2020
[0]PETSC ERROR: Configure options CFLAGS="-O3 -march=native -mtune=native -fPIE" --with-shared-libraries=1 --with-openmp=1 --with-threads=1 --with-fortran=0 --with-avx2=1 CXXOPTFLAGS="-O3 -march=native -mtune=native -fPIE" --with-cc=clang --with-cxx=clang++ --download-mpich
[0]PETSC ERROR: #1 TSHistoryUpdate() line 82 in /usr/local/petsc/src/ts/interface/tshistory.c
[0]PETSC ERROR: #2 TSTrajectorySet() line 73 in /usr/local/petsc/src/ts/trajectory/interface/traj.c
[0]PETSC ERROR: #3 TSSolve() line 4005 in /usr/local/petsc/src/ts/interface/ts.c
[0]PETSC ERROR: #4 MixedModelFormVARICFunctionGradient() line 301 in mixed.c
[0]PETSC ERROR: #5 TaoComputeObjectiveAndGradient() line 261 in /usr/local/petsc/src/tao/interface/taosolver_fg.c
[0]PETSC ERROR: #6 TaoSolve_LMVM() line 23 in /usr/local/petsc/src/tao/unconstrained/impls/lmvm/lmvm.c
[0]PETSC ERROR: #7 TaoSolve() line 219 in /usr/local/petsc/src/tao/interface/taosolver.c
[0]PETSC ERROR: #8 MixedModelOptimize() line 639 in mixed.c
[0]PETSC ERROR: #9 MixedModelOptimizeInitialCondition() line 648 in mixed.c
[0]PETSC ERROR: #10 main() line 76 in var_ic_test.c
[0]PETSC ERROR: No PETSc Option Table entries
[0]PETSC ERROR: ----------------End of Error Message -------send entire error message to petsc-maint at mcs.anl.gov<mailto:petsc-maint at mcs.anl.gov>----------

In the function MixedModelFormVARICFunctionGradient(), I do

ierr = TSSetTime(model->ts, 0.0);CHKERRQ(ierr);
ierr = TSSetStepNumber(model->ts, 0);CHKERRQ(ierr);
ierr = TSSetFromOptions(model->ts);CHKERRQ(ierr);
ierr = TSSetMaxTime(model->ts, model->obs->t);CHKERRQ(ierr);
ierr = TSSolve(model->ts, model->X);CHKERRQ(ierr);
... [allocating and setting cost gradient vec]
ierr = TSSetCostGradients(model->ts, 1, model->lambda, NULL);CHKERRQ(ierr);
ierr = TSAdjointSolve(model->ts);CHKERRQ(ierr);
ierr = VecCopy(model->lambda[0], G);CHKERRQ(ierr);

What might be causing the above error? Am I using a deprecated version of the Tao interface? (I'm using TaoSetObjectiveAndGradientRoutine, as done in ex20_opt_ic.c)

Thanks!

-Zane Jakobs


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