0 SNES Function norm 2.16768
      Linear solve converged due to CONVERGED_RTOL iterations 5
      1 SNES Function norm 5.24514e-06
      Linear solve converged due to CONVERGED_RTOL iterations 5
      2 SNES Function norm 1.899e-11
    0 SNES Function norm 1.18058
    Linear solve converged due to CONVERGED_RTOL iterations 4
    1 SNES Function norm 2.75972e-05
    Linear solve converged due to CONVERGED_RTOL iterations 5
    2 SNES Function norm 3.046e-11
  0 SNES Function norm 0.386707
  Linear solve converged due to CONVERGED_RTOL iterations 5
  1 SNES Function norm 0.0637671
  Linear solve converged due to CONVERGED_RTOL iterations 5
  2 SNES Function norm 3.02347e-07
  Linear solve converged due to CONVERGED_RTOL iterations 5
  3 SNES Function norm < 1.e-11
errors on 17 x 17 grid:  av |u-uexact|  = 2.707e-03,  |u-uexact|_inf = 1.428e-02