1PetscSF Object: 2 MPI processes 2 type not yet set 3 PetscSFSetGraph() has not been called yet 4PetscSF Object: 2 MPI processes 5 type: basic 6 sort=rank-order 7 [0] Number of roots=0, leaves=0, remote ranks=0 8 [1] Number of roots=0, leaves=0, remote ranks=0 9PetscSF Object: 2 MPI processes 10 type: basic 11 sort=rank-order 12 PetscSFSetGraph() has not been called yet 13PetscSF Object: 2 MPI processes 14 type: basic 15 sort=rank-order 16 [0] Number of roots=0, leaves=0, remote ranks=0 17 [1] Number of roots=0, leaves=0, remote ranks=0 18