830   PetscInt    *idx2;  in main()  local
847   PetscCall(PetscMalloc1(7 * ngen, &idx2));  in main()
849     idx2[7 * i]     = 9 * i;  in main()
850     idx2[7 * i + 1] = 9 * i + 1;  in main()
851     idx2[7 * i + 2] = 9 * i + 2;  in main()
852     idx2[7 * i + 3] = 9 * i + 3;  in main()
853     idx2[7 * i + 4] = 9 * i + 6;  in main()
854     idx2[7 * i + 5] = 9 * i + 7;  in main()
855     idx2[7 * i + 6] = 9 * i + 8;  in main()
857   PetscCall(ISCreateGeneral(PETSC_COMM_WORLD, 7 * ngen, idx2, PETSC_COPY_VALUES, &user.is_diff));  in main()
859   PetscCall(PetscFree(idx2));  in main()