0.585 * [progress]: [Phase 1 of 3] Setting up.
0.003 * * * [progress]: [1/2] Preparing points
0.109 * * * [progress]: [2/2] Setting up program.
0.112 * [progress]: [Phase 2 of 3] Improving.
0.113 * * * * [progress]: [ 1 / 1 ] simplifiying candidate #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
0.115 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
0.116 * * [simplify]: iteration 0: 6 enodes
0.123 * * [simplify]: iteration 1: 14 enodes
0.128 * * [simplify]: iteration 2: 35 enodes
0.136 * * [simplify]: iteration 3: 78 enodes
0.196 * * [simplify]: iteration 4: 238 enodes
0.351 * * [simplify]: iteration 5: 645 enodes
0.885 * * [simplify]: iteration 6: 1930 enodes
4.449 * * [simplify]: iteration complete: 5001 enodes
4.450 * * [simplify]: Extracting #0: cost 1 inf + 0
4.452 * * [simplify]: Extracting #1: cost 209 inf + 0
4.461 * * [simplify]: Extracting #2: cost 717 inf + 2625
4.493 * * [simplify]: Extracting #3: cost 395 inf + 58590
4.573 * * [simplify]: Extracting #4: cost 27 inf + 119891
4.654 * * [simplify]: Extracting #5: cost 6 inf + 122918
4.736 * * [simplify]: Extracting #6: cost 0 inf + 124436
4.813 * [simplify]: Simplified to:
  (- (* (* x x) (* x x)) (* (* y y) (* y y)))
4.823 * * [progress]: iteration 1 / 4
4.823 * * * [progress]: picking best candidate
4.826 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
4.826 * * * [progress]: localizing error
4.838 * * * [progress]: generating rewritten candidates
4.840 * * * [progress]: generating series expansions
4.840 * * * [progress]: simplifying candidates
4.840 * [simplify]: Simplifying:
  
4.840 * * [simplify]: iteration 0: 0 enodes
4.840 * * [simplify]: iteration complete: 0 enodes
4.840 * * [simplify]: Extracting #0: cost 0 inf + 0
4.840 * [simplify]: Simplified to:
  
4.840 * * * [progress]: adding candidates to table
4.841 * [progress]: [Phase 3 of 3] Extracting.
4.847 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
4.847 * * [simplify]: iteration 0: 6 enodes
4.847 * * [simplify]: iteration complete: 6 enodes
4.847 * * [simplify]: Extracting #0: cost 1 inf + 0
4.847 * * [simplify]: Extracting #1: cost 3 inf + 0
4.847 * * [simplify]: Extracting #2: cost 6 inf + 0
4.847 * * [simplify]: Extracting #3: cost 2 inf + 215
4.847 * * [simplify]: Extracting #4: cost 0 inf + 890
4.848 * [simplify]: Simplified to:
  (- (pow x 4) (pow y 4))
7.265 * [regime-testing]: Baseline error score: 0.002000250031253907
7.270 * [regime-testing]: Oracle error score: 0.002000250031253907
7.270 * [regime-testing]: End program error score: 0.002000250031253907