4.563 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.095 * * * [progress]: [2/2] Setting up program.
0.098 * [progress]: [Phase 2 of 3] Improving.
0.098 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (pow a 4.0) (pow (- b a) 4.0))
0.100 * * [simplify]: iteration  0 :  17  enodes  (cost  4 )
0.101 * * [simplify]: iteration  1 :  33  enodes  (cost  4 )
0.102 * * [simplify]: iteration  2 :  72  enodes  (cost  4 )
0.104 * * [simplify]: iteration  3 :  208  enodes  (cost  4 )
0.108 * * [simplify]: iteration  4 :  780  enodes  (cost  4 )
0.127 * * [simplify]: iteration  5 :  3990  enodes  (cost  4 )
0.235 * * [simplify]: iteration  6 :  5002  enodes  (cost  4 )
0.235 * [simplify]: Simplified to:
   (- (pow a 4.0) (pow (- b a) 4.0))
0.235 * [progress]: [Phase 3 of 3] Extracting.
0.238 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (pow a 4.0) (pow (- b a) 4.0))
0.239 * * [simplify]: iteration  0 :  7  enodes  (cost  4 )
0.239 * [simplify]: Simplified to:
   (- (pow a 4.0) (pow (- b a) 4.0))
3.087 * [regime-testing]: End program error score: 22.810653041316023