IS Object: 4 MPI processes
  type: general
[0] Number of indices in set 3
[0] 0 0
[0] 1 0
[0] 2 0
[1] Number of indices in set 3
[1] 0 1
[1] 1 1
[1] 2 2
[2] Number of indices in set 2
[2] 0 2
[2] 1 2
[3] Number of indices in set 2
[3] 0 3
[3] 1 3
