DM Object: 1 MPI process
  type: network
  NSubnets: 2; NEdges: 6; NVertices: 6; NSharedVertices: 2.
  [0] nEdges: 6; nVertices: 8; nSharedVertices: 2
     Subnet 0: nEdges 3, nVertices(include shared vertices) 4
       edge 0: 0 ----> 1
       edge 1: 1 ----> 2
       edge 2: 2 ----> 3
     Subnet 1: nEdges 3, nVertices(include shared vertices) 4
       edge 3: 0 ----> 1
       edge 4: 1 ----> 4
       edge 5: 4 ----> 5
     SharedVertices:
       svtx 0: global index 0, subnet[0].0 ---->
                                           ----> subnet[1].0
       svtx 1: global index 1, subnet[0].1 ---->
                                           ----> subnet[1].1
Vec Object: 1 MPI process
  type: seq
  Vertex 0:
    1.
    1.
    2.
  Vertex 1:
    1.
    1.
    2.
  Vertex 2:
    0.
    0.
  Vertex 3:
    0.
    0.
  Vertex 4:
    0.
  Vertex 5:
    0.
