0.516 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.037 * * * [progress]: [2/2] Setting up program.
0.039 * [progress]: [Phase 2 of 3] Improving.
0.039 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (/ 2.0 (+ 1.0 (exp (* -2.0 x)))) 1.0)
0.040 * * [simplify]: iteration  0 :  9  enodes  (cost  10 )
0.041 * * [simplify]: iteration  1 :  15  enodes  (cost  10 )
0.043 * * [simplify]: iteration  2 :  22  enodes  (cost  10 )
0.045 * * [simplify]: iteration  3 :  30  enodes  (cost  10 )
0.049 * * [simplify]: iteration  4 :  53  enodes  (cost  10 )
0.056 * * [simplify]: iteration  5 :  111  enodes  (cost  10 )
0.077 * * [simplify]: iteration  6 :  270  enodes  (cost  10 )