Vec Object: y_subcomm_0 3 MPI processes
  type: mpicuda
Process [0]
0.
-1.
-2.
-3.
-4.
-5.
-6.
Process [1]
-7.
-8.
-9.
-10.
-11.
-12.
-13.
Process [2]
-14.
-15.
-16.
-17.
-18.
-19.
Vec Object: x_commworld 7 MPI processes
  type: mpicuda
Process [0]
0.
-2.
-4.
Process [1]
-6.
-8.
-10.
Process [2]
-12.
-14.
-16.
Process [3]
-18.
-20.
-22.
Process [4]
-24.
-26.
-28.
Process [5]
-30.
-32.
-34.
Process [6]
-36.
-38.