1Failed to load initial guess, so use a vector of all zeros. 2 0 KSP Residual norm 7.07107 3 1 KSP Residual norm 0.392837 4 2 KSP Residual norm < 1.e-11 5Linear solve converged due to CONVERGED_RTOL iterations 2 6KSP Object: 2 MPI processes 7 type: cg 8 maximum iterations=10, initial guess is zero 9 tolerances: relative=1e-05, absolute=1e-50, divergence=10000. 10 left preconditioning 11 using PRECONDITIONED norm type for convergence test 12PC Object: 2 MPI processes 13 type: none 14 linear system matrix, followed by the matrix used to construct the preconditioner: 15 Mat Object: A 2 MPI processes 16 type: mpiaij 17 rows=4, cols=4 18 total: nonzeros=10, allocated nonzeros=10 19 total number of mallocs used during MatSetValues calls=0 20 using I-node (on process 0) routines: found 1 nodes, limit used is 5 21 Mat Object: 2 MPI processes 22 type: normalh 23 rows=4, cols=4 24KSP type: cg 25Number of iterations = 2 26Residual norm 0. 27