KSP Object: 8 MPI processes
  type: cg
  maximum iterations=10000, initial guess is zero
  tolerances: relative=1e-05, absolute=1e-50, divergence=10000.
  left preconditioning
  using PRECONDITIONED norm type for convergence test
PC Object: 8 MPI processes
  type: bddc
    Use verbose output: 0
    Use user-defined CSR: 0
    Use local mat graph: 1
    Connectivity graph topological dimension: 3
    Corner selection: 1 (selected 1)
    Use vertices: 1 (vertex size 3)
    Use edges: 1
    Use faces: 0
    Use true near null space: 0
    Use QR for single constraints on cc: 0
    Use change of basis on local edge nodes: 0
    Use change of basis on local face nodes: 0
    User defined change of basis matrix: 0
    Has change of basis matrix: 0
    Eliminate dirichlet boundary dofs: 0
    Switch on static condensation ops around the interface preconditioner: 0
    Use exact dirichlet trick: 1
    Interface extension: DIRICHLET
    Multilevel max levels: 0
    Multilevel coarsening ratio: 8
    Use estimated eigs for coarse problem: 0
    Use deluxe scaling: 0
    Use deluxe zerorows: 0
    Use deluxe singlemat: 0
    Rebuild interface graph for Schur principal minors: 0
    Number of dofs' layers for the computation of principal minors: -1
    Use user CSR graph to compute successive layers: 0
    Adaptive constraint selection threshold (active 0, userdefined 0): 0.
    Min constraints / connected component: 0
    Max constraints / connected component: 0
    Invert exact Schur complement for adaptive selection: 0
    Symmetric computation of primal basis functions: 1
    Num. Procs. to map coarse adjacency list: 0
    Coarse eqs per proc (significant at the coarsest level): 1
    Detect disconnected: 0 (filter 0)
    Benign subspace trick: 0 (change explicit 0)
    Benign subspace trick is active: 0
    Algebraic computation of no-net-flux: 0
  ********************************** STATISTICS AT LEVEL 0 **********************************
    Global dofs sizes: all 2160 interface 648 coarse 87
    Coarsening ratios: all/coarse 24 interface/coarse 7
    Active processes : 8
    Total subdomains : 8
    Dofs type        :	MIN	MAX	MEAN
    Interior  dofs   :	144	240	189
    Interface dofs   :	156	210	182
    Primal    dofs   :	36	36	36
    Local     dofs   :	300	450	371
    Local     subs   :	1	1
  --- Interior solver (rank 0)
    KSP Object: (pc_bddc_dirichlet_) 1 MPI process
      type: preonly
      maximum iterations=10000, initial guess is zero
      tolerances: relative=1e-05, absolute=1e-50, divergence=10000.
      left preconditioning
      not checking for convergence
    PC Object: (pc_bddc_dirichlet_) 1 MPI process
      type: lu
        out-of-place factorization
        tolerance for zero pivot 2.22045e-14
        matrix ordering: nd
        factor fill ratio given 5., needed 1.55143
          Factored matrix:
            Mat Object: (pc_bddc_dirichlet_) 1 MPI process
              type: seqaij
              rows=144, cols=144, bs=3
              package used to perform factorization: petsc
              total: nonzeros=9774, allocated nonzeros=9774
                using I-node routines: found 45 nodes, limit used is 5
      linear system matrix, which is also used to construct the preconditioner:
      Mat Object: (pc_bddc_dirichlet_) 1 MPI process
        type: seqaij
        rows=144, cols=144, bs=3
        total: nonzeros=6300, allocated nonzeros=6300
        total number of mallocs used during MatSetValues calls=0
          using I-node routines: found 48 nodes, limit used is 5
  --- Correction solver (rank 0)
    KSP Object: (pc_bddc_neumann_) 1 MPI process
      type: preonly
      maximum iterations=10000, initial guess is zero
      tolerances: relative=1e-05, absolute=1e-50, divergence=10000.
      left preconditioning
      not checking for convergence
    PC Object: (pc_bddc_neumann_) 1 MPI process
      type: lu
        out-of-place factorization
        tolerance for zero pivot 2.22045e-14
        matrix ordering: nd
        factor fill ratio given 5., needed 2.16719
          Factored matrix:
            Mat Object: (pc_bddc_neumann_) 1 MPI process
              type: seqaij
              rows=279, cols=279, bs=3
              package used to perform factorization: petsc
              total: nonzeros=30915, allocated nonzeros=30915
                using I-node routines: found 85 nodes, limit used is 5
      linear system matrix, which is also used to construct the preconditioner:
      Mat Object: (pc_bddc_neumann_) 1 MPI process
        type: seqaij
        rows=279, cols=279, bs=3
        total: nonzeros=14265, allocated nonzeros=14265
        total number of mallocs used during MatSetValues calls=0
          using I-node routines: found 93 nodes, limit used is 5
  --- Coarse solver
    KSP Object: (pc_bddc_coarse_) 8 MPI processes
      type: preonly
      maximum iterations=1, initial guess is zero
      tolerances: relative=1e-05, absolute=1e-50, divergence=10000.
      left preconditioning
      not checking for convergence
    PC Object: (pc_bddc_coarse_) 8 MPI processes
      type: redundant
        First (color=0) of 8 PCs follows
        KSP Object: (pc_bddc_coarse_redundant_) 1 MPI process
          type: preonly
          maximum iterations=10000, initial guess is zero
          tolerances: relative=1e-05, absolute=1e-50, divergence=10000.
          left preconditioning
          not checking for convergence
        PC Object: (pc_bddc_coarse_redundant_) 1 MPI process
          type: svd
            All singular values smaller than 1e-12 treated as zero
            Provided essential rank of the matrix 0 (all other eigenvalues are zeroed)
          linear system matrix, which is also used to construct the preconditioner:
          Mat Object: 1 MPI process
            type: seqaij
            rows=87, cols=87
            total: nonzeros=5277, allocated nonzeros=5277
            total number of mallocs used during MatSetValues calls=0
              using I-node routines: found 25 nodes, limit used is 5
      linear system matrix, which is also used to construct the preconditioner:
      Mat Object: (pc_bddc_coarse_) 8 MPI processes
        type: mpiaij
        rows=87, cols=87
        total: nonzeros=5277, allocated nonzeros=5277
        total number of mallocs used during MatSetValues calls=0
          using I-node (on process 0) routines: found 3 nodes, limit used is 5
  linear system matrix, which is also used to construct the preconditioner:
  Mat Object: 8 MPI processes
    type: is
    rows=2160, cols=2160, bs=3
    total: nonzeros=156078, allocated nonzeros=156078
    total number of mallocs used during MatSetValues calls=0
      has attached near null space
