0.876 * [progress]: [Phase 1 of 3] Setting up.
0.002 * * * [progress]: [1/2] Preparing points
0.162 * * * [progress]: [2/2] Setting up program.
0.168 * [progress]: [Phase 2 of 3] Improving.
0.168 * * * * [progress]: [ 1 / 1 ] simplifiying candidate #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
0.170 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
0.171 * * [simplify]: iteration 0: 6 enodes
0.177 * * [simplify]: iteration 1: 14 enodes
0.181 * * [simplify]: iteration 2: 34 enodes
0.187 * * [simplify]: iteration 3: 72 enodes
0.213 * * [simplify]: iteration 4: 233 enodes
0.356 * * [simplify]: iteration 5: 638 enodes
0.716 * * [simplify]: iteration 6: 1743 enodes
1.235 * * [simplify]: iteration complete: 5023 enodes
1.236 * * [simplify]: Extracting #0: cost 1 inf + 0
1.237 * * [simplify]: Extracting #1: cost 204 inf + 0
1.242 * * [simplify]: Extracting #2: cost 1167 inf + 0
1.255 * * [simplify]: Extracting #3: cost 1937 inf + 1186
1.284 * * [simplify]: Extracting #4: cost 1197 inf + 85691
1.354 * * [simplify]: Extracting #5: cost 130 inf + 245851
1.423 * * [simplify]: Extracting #6: cost 3 inf + 268216
1.508 * * [simplify]: Extracting #7: cost 0 inf + 268975
1.580 * [simplify]: Simplified to:
  (* (+ (* y y) (* x x)) (- (* x x) (* y y)))
1.586 * * [progress]: iteration 1 / 4
1.586 * * * [progress]: picking best candidate
1.589 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
1.589 * * * [progress]: localizing error
1.606 * * * [progress]: generating rewritten candidates
1.607 * * * [progress]: generating series expansions
1.607 * * * [progress]: simplifying candidates
1.607 * [simplify]: Simplifying:
  
1.607 * * [simplify]: iteration 0: 0 enodes
1.607 * * [simplify]: iteration complete: 0 enodes
1.607 * * [simplify]: Extracting #0: cost 0 inf + 0
1.607 * [simplify]: Simplified to:
  
1.607 * * * [progress]: adding candidates to table
1.608 * [progress]: [Phase 3 of 3] Extracting.
1.611 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
1.611 * * [simplify]: iteration 0: 6 enodes
1.611 * * [simplify]: iteration complete: 6 enodes
1.611 * * [simplify]: Extracting #0: cost 1 inf + 0
1.611 * * [simplify]: Extracting #1: cost 3 inf + 0
1.611 * * [simplify]: Extracting #2: cost 6 inf + 0
1.611 * * [simplify]: Extracting #3: cost 2 inf + 215
1.612 * * [simplify]: Extracting #4: cost 0 inf + 890
1.612 * [simplify]: Simplified to:
  (- (pow x 4) (pow y 4))
3.675 * [regime-testing]: Baseline error score: 0.002000250031253907
3.678 * [regime-testing]: Oracle error score: 0.002000250031253907
3.679 * [regime-testing]: End program error score: 0.002000250031253907