0 KSP Residual norm < 1.e-11 Linear solve converged due to CONVERGED_ATOL iterations 0 KSP Object: 1 MPI process type: cg maximum iterations=10, nonzero initial guess tolerances: relative=1e-05, absolute=1e-50, divergence=10000. left preconditioning using PRECONDITIONED norm type for convergence test PC Object: 1 MPI process type: none linear system matrix, followed by the matrix used to construct the preconditioner: Mat Object: A 1 MPI process type: seqaij rows=4, cols=4 total: nonzeros=10, allocated nonzeros=10 total number of mallocs used during MatSetValues calls=0 not using I-node routines Mat Object: 1 MPI process type: normalh rows=4, cols=4 KSP type: cg Number of iterations = 0 Residual norm 0.