13.894 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.016 * * * [progress]: [2/2] Setting up program.
0.018 * [progress]: [Phase 2 of 3] Improving.
0.018 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* (+ x y) (- x y))
0.019 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
0.019 * * [simplify]: iteration  1 :  9  enodes  (cost  7 )
0.021 * * [simplify]: iteration  2 :  24  enodes  (cost  7 )
0.024 * * [simplify]: iteration  3 :  59  enodes  (cost  7 )
0.032 * * [simplify]: iteration  4 :  118  enodes  (cost  7 )
0.053 * * [simplify]: iteration  5 :  224  enodes  (cost  7 )
0.087 * * [simplify]: iteration  6 :  319  enodes  (cost  7 )
0.141 * * [simplify]: iteration  7 :  499  enodes  (cost  7 )