0.624 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.029 * * * [progress]: [2/2] Setting up program.
0.032 * [progress]: [Phase 2 of 3] Improving.
0.032 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (- (+ (* x x) (* y y)) (* z z)) (* y 2.0))
0.033 * * [simplify]: iteration  0 :  11  enodes  (cost  15 )
0.034 * * [simplify]: iteration  1 :  22  enodes  (cost  15 )
0.037 * * [simplify]: iteration  2 :  54  enodes  (cost  15 )
0.044 * * [simplify]: iteration  3 :  97  enodes  (cost  15 )
0.056 * * [simplify]: iteration  4 :  170  enodes  (cost  15 )
0.080 * * [simplify]: iteration  5 :  310  enodes  (cost  15 )
0.127 * * [simplify]: iteration  6 :  624  enodes  (cost  15 )