3.410 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.023 * * * [progress]: [2/2] Setting up program.
0.025 * [progress]: [Phase 2 of 3] Improving.
0.025 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (+ x (/ (* (- y x) (- z t)) (- a t)))
0.026 * * [simplify]: iteration  0 :  11  enodes  (cost  13 )
0.028 * * [simplify]: iteration  1 :  20  enodes  (cost  13 )
0.034 * * [simplify]: iteration  2 :  45  enodes  (cost  13 )
0.040 * * [simplify]: iteration  3 :  111  enodes  (cost  13 )
0.056 * * [simplify]: iteration  4 :  250  enodes  (cost  13 )
0.099 * * [simplify]: iteration  5 :  525  enodes  (cost  13 )
0.215 * * [simplify]: iteration  6 :  1110  enodes  (cost  13 )
0.540 * * [simplify]: iteration  7 :  1780  enodes  (cost  13 )
1.207 * * [simplify]: iteration  8 :  3030  enodes  (cost  13 )