0.451 * [progress]: [Phase 1 of 3] Setting up.
0.002 * * * [progress]: [1/2] Preparing points
0.142 * * * [progress]: [2/2] Setting up program.
0.146 * [progress]: [Phase 2 of 3] Improving.
0.146 * * * * [progress]: [ 1 / 1 ] simplifiying candidate #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
0.148 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
0.148 * * [simplify]: iteration 0: 6 enodes
0.153 * * [simplify]: iteration 1: 14 enodes
0.157 * * [simplify]: iteration 2: 35 enodes
0.550 * * [simplify]: iteration 3: 78 enodes
0.565 * * [simplify]: iteration 4: 238 enodes
0.743 * * [simplify]: iteration 5: 645 enodes
1.158 * * [simplify]: iteration 6: 1930 enodes
1.516 * * [simplify]: iteration 7: 2014 enodes
1.836 * * [simplify]: iteration complete: 2014 enodes
1.836 * * [simplify]: Extracting #0: cost 1 inf + 0
1.836 * * [simplify]: Extracting #1: cost 110 inf + 0
1.838 * * [simplify]: Extracting #2: cost 350 inf + 208
1.842 * * [simplify]: Extracting #3: cost 212 inf + 15173
1.858 * * [simplify]: Extracting #4: cost 58 inf + 39743
1.882 * * [simplify]: Extracting #5: cost 7 inf + 50199
1.908 * * [simplify]: Extracting #6: cost 0 inf + 52043
1.934 * [simplify]: Simplified to:
  (- (* (* x x) (* x x)) (* (* y y) (* y y)))
1.945 * * [progress]: iteration 1 / 4
1.945 * * * [progress]: picking best candidate
1.950 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
1.950 * * * [progress]: localizing error
1.973 * * * [progress]: generating rewritten candidates
1.974 * * * [progress]: generating series expansions
1.974 * * * [progress]: simplifying candidates
1.975 * [simplify]: Simplifying:
  
1.975 * * [simplify]: iteration 0: 0 enodes
1.975 * * [simplify]: iteration complete: 0 enodes
1.975 * * [simplify]: Extracting #0: cost 0 inf + 0
1.975 * [simplify]: Simplified to:
  
1.975 * * * [progress]: adding candidates to table
1.976 * [progress]: [Phase 3 of 3] Extracting.
1.989 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
1.989 * * [simplify]: iteration 0: 6 enodes
1.990 * * [simplify]: iteration complete: 6 enodes
1.990 * * [simplify]: Extracting #0: cost 1 inf + 0
1.990 * * [simplify]: Extracting #1: cost 3 inf + 0
1.990 * * [simplify]: Extracting #2: cost 6 inf + 0
1.990 * * [simplify]: Extracting #3: cost 2 inf + 215
1.990 * * [simplify]: Extracting #4: cost 0 inf + 890
1.990 * [simplify]: Simplified to:
  (- (pow x 4) (pow y 4))
4.353 * [regime-testing]: Baseline error score: 0.0030003750468808603
4.358 * [regime-testing]: Oracle error score: 0.0030003750468808603
4.358 * [regime-testing]: End program error score: 0.0030003750468808603