15.301 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.043 * * * [progress]: [2/2] Setting up program.
0.050 * [progress]: [Phase 2 of 3] Improving.
0.050 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (/ 1.0 (+ 1.0 (exp (neg (+ (+ (+ (* x1 y1) (* x2 y2)) (* x3 y3)) (* x4 y4))))))
0.053 * * [simplify]: iteration  0 :  38  enodes  (cost  11 )
0.055 * * [simplify]: iteration  1 :  89  enodes  (cost  11 )
0.057 * * [simplify]: iteration  2 :  235  enodes  (cost  11 )
0.061 * * [simplify]: iteration  3 :  577  enodes  (cost  11 )
0.071 * * [simplify]: iteration  4 :  1747  enodes  (cost  11 )
0.099 * * [simplify]: iteration  5 :  5001  enodes  (cost  11 )
0.100 * [simplify]: Simplified to:
   (/ 1.0 (+ 1.0 (exp (neg (+ (+ (+ (* x1 y1) (* x2 y2)) (* x3 y3)) (* x4 y4))))))
0.100 * [progress]: [Phase 3 of 3] Extracting.
0.106 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (/ 1.0 (+ 1.0 (exp (neg (+ (+ (+ (* x1 y1) (* x2 y2)) (* x3 y3)) (* x4 y4))))))
0.107 * * [simplify]: iteration  0 :  31  enodes  (cost  11 )
0.107 * * [simplify]: iteration  1 :  42  enodes  (cost  11 )
0.107 * * [simplify]: iteration  2 :  52  enodes  (cost  11 )
0.108 * * [simplify]: iteration  3 :  64  enodes  (cost  11 )
0.108 * * [simplify]: iteration  4 :  64  enodes  (cost  11 )
0.108 * [simplify]: Simplified to:
   (/ 1.0 (+ 1.0 (exp (neg (+ (+ (+ (* x1 y1) (* x2 y2)) (* x3 y3)) (* x4 y4))))))
1.760 * [regime-testing]: End program error score: 2.610272409526252