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