75.431 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.040 * * * [progress]: [2/2] Setting up program.
0.043 * [progress]: [Phase 2 of 3] Improving.
0.043 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (+ (- (* (* x 9.0) y) (* (* (* z 4.0) t) a)) b) (* z c))
0.044 * * [simplify]: iteration  0 :  18  enodes  (cost  19 )
0.049 * * [simplify]: iteration  1 :  37  enodes  (cost  19 )
0.054 * * [simplify]: iteration  2 :  91  enodes  (cost  19 )
0.068 * * [simplify]: iteration  3 :  269  enodes  (cost  19 )
0.119 * * [simplify]: iteration  4 :  717  enodes  (cost  19 )
0.279 * * [simplify]: iteration  5 :  1628  enodes  (cost  19 )