0.232 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.024 * * * [progress]: [2/2] Setting up program.
0.027 * [progress]: [Phase 2 of 3] Improving.
0.027 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (+ x y) (/ (* (- z t) y) (- a t)))
0.028 * * [simplify]: iteration  0 :  11  enodes  (cost  13 )
0.029 * * [simplify]: iteration  1 :  22  enodes  (cost  13 )
0.036 * * [simplify]: iteration  2 :  51  enodes  (cost  13 )
0.042 * * [simplify]: iteration  3 :  102  enodes  (cost  13 )
0.056 * * [simplify]: iteration  4 :  200  enodes  (cost  13 )
0.090 * * [simplify]: iteration  5 :  398  enodes  (cost  13 )
0.171 * * [simplify]: iteration  6 :  630  enodes  (cost  13 )
0.367 * * [simplify]: iteration  7 :  798  enodes  (cost  13 )
0.630 * * [simplify]: iteration  8 :  955  enodes  (cost  13 )
0.977 * * [simplify]: iteration  9 :  1270  enodes  (cost  13 )