0.635 * [progress]: [Phase 1 of 3] Setting up.
0.002 * * * [progress]: [1/2] Preparing points
0.177 * * * [progress]: [2/2] Setting up program.
0.184 * [progress]: [Phase 2 of 3] Improving.
0.184 * * * * [progress]: [ 1 / 1 ] simplifiying candidate #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
0.187 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
0.188 * * [simplify]: iteration 1: (6 enodes)
0.197 * * [simplify]: iteration 2: (14 enodes)
0.206 * * [simplify]: iteration 3: (39 enodes)
0.257 * * [simplify]: iteration 4: (60 enodes)
0.265 * * [simplify]: iteration 5: (114 enodes)
0.299 * * [simplify]: iteration 6: (252 enodes)
0.372 * * [simplify]: iteration 7: (498 enodes)
0.689 * * [simplify]: iteration 8: (1074 enodes)
1.383 * * [simplify]: Extracting #0: cost 1 inf + 0
1.383 * * [simplify]: Extracting #1: cost 86 inf + 0
1.385 * * [simplify]: Extracting #2: cost 233 inf + 424
1.402 * * [simplify]: Extracting #3: cost 116 inf + 26011
1.436 * * [simplify]: Extracting #4: cost 16 inf + 46139
1.474 * * [simplify]: Extracting #5: cost 0 inf + 48411
1.512 * * [simplify]: Extracting #6: cost 0 inf + 48251
1.548 * [simplify]: Simplified to:
  (- (* (* x x) (* x x)) (* (* y y) (* y y)))
1.556 * * [progress]: iteration 1 / 4
1.556 * * * [progress]: picking best candidate
1.558 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
1.558 * * * [progress]: localizing error
1.570 * * * [progress]: generating rewritten candidates
1.570 * * * [progress]: generating series expansions
1.571 * * * [progress]: simplifying candidates
1.571 * [simplify]: Simplifying:
  
1.571 * * [simplify]: iteration 1: (0 enodes)
1.571 * * [simplify]: Extracting #0: cost 0 inf + 0
1.571 * [simplify]: Simplified to:
  
1.571 * * * [progress]: adding candidates to table
1.571 * [progress]: [Phase 3 of 3] Extracting.
1.574 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
1.574 * * [simplify]: iteration 1: (6 enodes)
1.574 * * [simplify]: Extracting #0: cost 1 inf + 0
1.574 * * [simplify]: Extracting #1: cost 3 inf + 0
1.574 * * [simplify]: Extracting #2: cost 6 inf + 0
1.574 * * [simplify]: Extracting #3: cost 2 inf + 215
1.574 * * [simplify]: Extracting #4: cost 0 inf + 890
1.574 * [simplify]: Simplified to:
  (- (pow x 4) (pow y 4))
4.451 * [regime-testing]: Baseline error score: 0.0031253906738342293
4.454 * [regime-testing]: Oracle error score: 0.0031253906738342293
4.454 * [regime-testing]: End program error score: 0.0031253906738342293