0.004 * [progress]: [Phase 1 of 3] Setting up.
0.005 * * * [progress]: [1/2] Preparing points
0.873 * * * [progress]: [2/2] Setting up program.
0.883 * [progress]: [Phase 2 of 3] Improving.
0.883 * * * * [progress]: [ 1 / 1 ] simplifiying candidate #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
0.886 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
0.887 * * [simplify]: iteration 1: (6 enodes)
0.898 * * [simplify]: iteration 2: (26 enodes)
0.910 * * [simplify]: iteration 3: (52 enodes)
0.928 * * [simplify]: iteration 4: (83 enodes)
0.958 * * [simplify]: iteration 5: (135 enodes)
1.021 * * [simplify]: iteration 6: (262 enodes)
1.140 * * [simplify]: iteration 7: (775 enodes)
1.665 * * [simplify]: Extracting #0: cost 1 inf + 0
1.666 * * [simplify]: Extracting #1: cost 88 inf + 0
1.668 * * [simplify]: Extracting #2: cost 388 inf + 0
1.673 * * [simplify]: Extracting #3: cost 397 inf + 14513
1.698 * * [simplify]: Extracting #4: cost 128 inf + 66599
1.735 * * [simplify]: Extracting #5: cost 4 inf + 94731
1.774 * * [simplify]: Extracting #6: cost 0 inf + 96372
1.825 * [simplify]: Simplified to:
  (* (- (* x x) (* y y)) (+ (* y y) (* x x)))
1.838 * * [progress]: iteration 1 / 4
1.838 * * * [progress]: picking best candidate
1.844 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 4) (pow y 4)))>
1.844 * * * [progress]: localizing error
1.867 * * * [progress]: generating rewritten candidates
1.868 * * * [progress]: generating series expansions
1.869 * * * [progress]: simplifying candidates
1.869 * [simplify]: Simplifying:
  
1.869 * * [simplify]: iteration 1: (0 enodes)
1.869 * * [simplify]: Extracting #0: cost 0 inf + 0
1.869 * [simplify]: Simplified to:
  
1.869 * * * [progress]: adding candidates to table
1.870 * [progress]: [Phase 3 of 3] Extracting.
1.875 * [simplify]: Simplifying:
  (- (pow x 4) (pow y 4))
1.875 * * [simplify]: iteration 1: (6 enodes)
1.876 * * [simplify]: Extracting #0: cost 1 inf + 0
1.876 * * [simplify]: Extracting #1: cost 3 inf + 0
1.876 * * [simplify]: Extracting #2: cost 6 inf + 0
1.876 * * [simplify]: Extracting #3: cost 2 inf + 215
1.876 * * [simplify]: Extracting #4: cost 0 inf + 890
1.876 * [simplify]: Simplified to:
  (- (pow x 4) (pow y 4))
4.522 * [regime-testing]: Baseline error score: 0.002125265658207276
4.526 * [regime-testing]: Oracle error score: 0.002125265658207276
4.527 * [regime-testing]: End program error score: 0.002125265658207276