0.797 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.011 * * * [progress]: [2/2] Setting up program.
0.012 * [progress]: [Phase 2 of 3] Improving.
0.013 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (+ x y) (* x y))
0.013 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
0.014 * * [simplify]: iteration  1 :  11  enodes  (cost  7 )
0.015 * * [simplify]: iteration  2 :  24  enodes  (cost  7 )
0.018 * * [simplify]: iteration  3 :  35  enodes  (cost  7 )
0.027 * * [simplify]: iteration  4 :  46  enodes  (cost  7 )
0.033 * * [simplify]: iteration  5 :  68  enodes  (cost  7 )