0.584 * [progress]: [Phase 1 of 3] Setting up.
0.006 * * * [progress]: [1/2] Preparing points
0.192 * * * [progress]: [2/2] Setting up program.
0.199 * [progress]: [Phase 2 of 3] Improving.
0.199 * * * * [progress]: [ 1 / 1 ] simplifiying candidate #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
0.205 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
0.206 * * [simplify]: iteration 0: 6 enodes
0.214 * * [simplify]: iteration 1: 14 enodes
0.222 * * [simplify]: iteration 2: 34 enodes
0.235 * * [simplify]: iteration 3: 72 enodes
0.284 * * [simplify]: iteration 4: 233 enodes
0.376 * * [simplify]: iteration 5: 638 enodes
0.664 * * [simplify]: iteration 6: 1743 enodes
0.962 * * [simplify]: iteration 7: 2000 enodes
1.288 * * [simplify]: iteration complete: 2000 enodes
1.288 * * [simplify]: Extracting #0: cost 1 inf + 0
1.289 * * [simplify]: Extracting #1: cost 88 inf + 0
1.290 * * [simplify]: Extracting #2: cost 315 inf + 0
1.294 * * [simplify]: Extracting #3: cost 423 inf + 2194
1.303 * * [simplify]: Extracting #4: cost 236 inf + 18489
1.329 * * [simplify]: Extracting #5: cost 22 inf + 51292
1.352 * * [simplify]: Extracting #6: cost 0 inf + 56366
1.372 * [simplify]: Simplified to:
  (- (* (* x x) (* x x)) (* (* y y) (* y y)))
1.378 * * [progress]: iteration 1 / 4
1.378 * * * [progress]: picking best candidate
1.381 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
1.381 * * * [progress]: localizing error
1.392 * * * [progress]: generating rewritten candidates
1.393 * * * [progress]: generating series expansions
1.393 * * * [progress]: simplifying candidates
1.393 * [simplify]: Simplifying:
  
1.393 * * [simplify]: iteration 0: 0 enodes
1.393 * * [simplify]: iteration complete: 0 enodes
1.393 * * [simplify]: Extracting #0: cost 0 inf + 0
1.393 * [simplify]: Simplified to:
  
1.393 * * * [progress]: adding candidates to table
1.393 * [progress]: [Phase 3 of 3] Extracting.
1.396 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
1.396 * * [simplify]: iteration 0: 6 enodes
1.397 * * [simplify]: iteration complete: 6 enodes
1.397 * * [simplify]: Extracting #0: cost 1 inf + 0
1.397 * * [simplify]: Extracting #1: cost 3 inf + 0
1.397 * * [simplify]: Extracting #2: cost 6 inf + 0
1.397 * * [simplify]: Extracting #3: cost 2 inf + 215
1.397 * * [simplify]: Extracting #4: cost 0 inf + 890
1.397 * [simplify]: Simplified to:
  (- (pow x 4) (pow y 4))
4.049 * [regime-testing]: Baseline error score: 0.0030003750468808603
4.052 * [regime-testing]: Oracle error score: 0.0030003750468808603
4.052 * [regime-testing]: End program error score: 0.0030003750468808603