0.112 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.023 * * * [progress]: [2/2] Setting up program.
0.026 * [progress]: [Phase 2 of 3] Improving.
0.026 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (+ (* x y) (* z (- t a))) (+ y (* z (- b y))))
0.028 * * [simplify]: iteration  0 :  14  enodes  (cost  17 )
0.029 * * [simplify]: iteration  1 :  24  enodes  (cost  16 )
0.032 * * [simplify]: iteration  2 :  43  enodes  (cost  15 )
0.037 * * [simplify]: iteration  3 :  66  enodes  (cost  15 )
0.045 * * [simplify]: iteration  4 :  97  enodes  (cost  15 )
0.056 * * [simplify]: iteration  5 :  131  enodes  (cost  15 )
0.074 * * [simplify]: iteration  6 :  164  enodes  (cost  15 )
0.092 * * [simplify]: iteration  7 :  240  enodes  (cost  15 )
0.130 * * [simplify]: iteration  8 :  473  enodes  (cost  15 )
0.214 * * [simplify]: iteration  9 :  861  enodes  (cost  15 )