3.612 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.050 * * * [progress]: [2/2] Setting up program.
0.053 * [progress]: [Phase 2 of 3] Improving.
0.053 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (+ (- (+ (+ x y) z) (* z (log t))) (* (- a 0.5) b))
0.054 * * [simplify]: iteration  0 :  15  enodes  (cost  16 )
0.056 * * [simplify]: iteration  1 :  30  enodes  (cost  16 )
0.060 * * [simplify]: iteration  2 :  87  enodes  (cost  15 )
0.076 * * [simplify]: iteration  3 :  243  enodes  (cost  15 )
0.118 * * [simplify]: iteration  4 :  725  enodes  (cost  15 )