1.710 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.025 * * * [progress]: [2/2] Setting up program.
0.028 * [progress]: [Phase 2 of 3] Improving.
0.028 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (+ x y) (/ (* (- z t) y) (- a t)))
0.029 * * [simplify]: iteration  0 :  11  enodes  (cost  13 )
0.030 * * [simplify]: iteration  1 :  22  enodes  (cost  13 )
0.033 * * [simplify]: iteration  2 :  51  enodes  (cost  13 )
0.039 * * [simplify]: iteration  3 :  104  enodes  (cost  13 )
0.059 * * [simplify]: iteration  4 :  214  enodes  (cost  12 )
0.093 * * [simplify]: iteration  5 :  463  enodes  (cost  12 )