*** PetscViewer[write] using MPI-IO ***
*** PetscViewer[write] skipping header ***
*** PetscViewer[load] skipping header ***
*** PetscViewer[load] using MPI-IO ***
VecCompare
  min(a)   = +8.40e-04 [loc 8]
  max(a)   = +9.95e+03 [loc 3]
  min(b)   = +8.40e-04 [loc 8]
  max(b)   = +9.95e+03 [loc 3]
  min(a-b) < 1.0e-10
Headerless read of data verified