0.618 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.032 * * * [progress]: [2/2] Setting up program.
0.034 * [progress]: [Phase 2 of 3] Improving.
0.034 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (+ x (/ (* (- y z) (- t x)) (- a z)))
0.036 * * [simplify]: iteration  0 :  11  enodes  (cost  13 )
0.037 * * [simplify]: iteration  1 :  20  enodes  (cost  13 )
0.039 * * [simplify]: iteration  2 :  45  enodes  (cost  13 )
0.046 * * [simplify]: iteration  3 :  116  enodes  (cost  12 )
0.063 * * [simplify]: iteration  4 :  284  enodes  (cost  12 )
0.112 * * [simplify]: iteration  5 :  650  enodes  (cost  12 )