1.022 * [progress]: [Phase 1 of 3] Setting up.
0.002 * * * [progress]: [1/2] Preparing points
0.118 * * * [progress]: [2/2] Setting up program.
0.123 * [progress]: [Phase 2 of 3] Improving.
0.123 * * * * [progress]: [ 1 / 1 ] simplifiying candidate #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
0.125 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
0.126 * * [simplify]: iteration 0: 6 enodes
0.130 * * [simplify]: iteration 1: 14 enodes
0.135 * * [simplify]: iteration 2: 35 enodes
0.142 * * [simplify]: iteration 3: 78 enodes
0.158 * * [simplify]: iteration 4: 238 enodes
0.338 * * [simplify]: iteration 5: 645 enodes
0.704 * * [simplify]: iteration 6: 1930 enodes
3.927 * * [simplify]: iteration complete: 5001 enodes
3.927 * * [simplify]: Extracting #0: cost 1 inf + 0
3.928 * * [simplify]: Extracting #1: cost 209 inf + 0
3.933 * * [simplify]: Extracting #2: cost 717 inf + 2625
3.960 * * [simplify]: Extracting #3: cost 395 inf + 58590
4.002 * * [simplify]: Extracting #4: cost 27 inf + 119891
4.072 * * [simplify]: Extracting #5: cost 6 inf + 122918
4.125 * * [simplify]: Extracting #6: cost 0 inf + 124436
4.183 * [simplify]: Simplified to:
  (- (* (* x x) (* x x)) (* (* y y) (* y y)))
4.189 * * [progress]: iteration 1 / 4
4.189 * * * [progress]: picking best candidate
4.192 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
4.192 * * * [progress]: localizing error
4.208 * * * [progress]: generating rewritten candidates
4.209 * * * [progress]: generating series expansions
4.210 * * * [progress]: simplifying candidates
4.210 * [simplify]: Simplifying:
  
4.210 * * [simplify]: iteration 0: 0 enodes
4.210 * * [simplify]: iteration complete: 0 enodes
4.210 * * [simplify]: Extracting #0: cost 0 inf + 0
4.210 * [simplify]: Simplified to:
  
4.210 * * * [progress]: adding candidates to table
4.211 * [progress]: [Phase 3 of 3] Extracting.
4.216 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
4.217 * * [simplify]: iteration 0: 6 enodes
4.217 * * [simplify]: iteration complete: 6 enodes
4.217 * * [simplify]: Extracting #0: cost 1 inf + 0
4.217 * * [simplify]: Extracting #1: cost 3 inf + 0
4.217 * * [simplify]: Extracting #2: cost 6 inf + 0
4.217 * * [simplify]: Extracting #3: cost 2 inf + 215
4.217 * * [simplify]: Extracting #4: cost 0 inf + 890
4.217 * [simplify]: Simplified to:
  (- (pow x 4) (pow y 4))
6.273 * [regime-testing]: Baseline error score: 0.002000250031253907
6.276 * [regime-testing]: Oracle error score: 0.002000250031253907
6.276 * [regime-testing]: End program error score: 0.002000250031253907