setup done: square       side length = 4.000
            grid               Mx,My = 21,21
            spacing            dx,dy = 0.200,0.200
  0 SNES Function norm 25.4417 
  1 SNES Function norm 22.8975 
  2 SNES Function norm 20.6078 
  3 SNES Function norm 18.547 
  4 SNES Function norm 16.6923 
  5 SNES Function norm 15.0231 
  6 SNES Function norm 13.5208 
  7 SNES Function norm 4.51122 
  8 SNES Function norm 2.14075 
  9 SNES Function norm 1.67019e-05 
 10 SNES Function norm 9.632e-11 
number of Newton iterations = 10; result = CONVERGED_FNORM_RELATIVE
errors:    av |u-uexact|  = 1.287e-03
           |u-uexact|_inf = 7.882e-03
