6.905 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.045 * * * [progress]: [2/2] Setting up program.
0.048 * [progress]: [Phase 2 of 3] Improving.
0.049 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (+ (- (* (* x 9.0) y) (* (* (* z 4.0) t) a)) b) (* z c))
0.050 * * [simplify]: iteration  0 :  18  enodes  (cost  19 )
0.052 * * [simplify]: iteration  1 :  38  enodes  (cost  19 )
0.058 * * [simplify]: iteration  2 :  100  enodes  (cost  19 )
0.075 * * [simplify]: iteration  3 :  308  enodes  (cost  18 )
0.139 * * [simplify]: iteration  4 :  859  enodes  (cost  18 )
0.330 * * [simplify]: iteration  5 :  1856  enodes  (cost  18 )