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