IS Object: 2 MPI processes
  type: general
[0] Number of indices in set 0
[1] Number of indices in set 4
[1] 0 8
[1] 1 9
[1] 2 10
[1] 3 11
Vec Object: 2 MPI processes
  type: mpi
Process [0]
Process [1]
-8.
-4.
0.
4.