19.551 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.041 * * * [progress]: [2/2] Setting up program.
0.044 * [progress]: [Phase 2 of 3] Improving.
0.044 * [simplify]: Simplifying:
  (- (pow x 4.0) (pow y 4.0))
0.044 * * [simplify]: Extracting # 0 : cost  0
0.044 * * [simplify]: Extracting # 1 : cost  0
0.044 * * [simplify]: Extracting # 2 : cost  0
0.044 * * [simplify]: Extracting # 3 : cost  0
0.044 * * [simplify]: Extracting # 4 : cost  0
0.044 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
0.045 * * [simplify]: Extracting # 0 : cost  0
0.046 * * [simplify]: Extracting # 1 : cost  0
0.046 * * [simplify]: Extracting # 2 : cost  0
0.046 * * [simplify]: Extracting # 3 : cost  0
0.046 * * [simplify]: Extracting # 4 : cost  0
0.046 * * [simplify]: iteration  1 :  14  enodes  (cost  7 )
0.048 * * [simplify]: Extracting # 0 : cost  0
0.048 * * [simplify]: Extracting # 1 : cost  0
0.048 * * [simplify]: Extracting # 2 : cost  0
0.048 * * [simplify]: Extracting # 3 : cost  0
0.048 * * [simplify]: Extracting # 4 : cost  0
0.048 * * [simplify]: iteration  2 :  29  enodes  (cost  7 )
0.054 * * [simplify]: Extracting # 0 : cost  0
0.055 * * [simplify]: Extracting # 1 : cost  0
0.055 * * [simplify]: Extracting # 2 : cost  0
0.055 * * [simplify]: Extracting # 3 : cost  0
0.055 * * [simplify]: Extracting # 4 : cost  0
0.055 * * [simplify]: Extracting # 5 : cost  0
0.055 * * [simplify]: iteration  3 :  69  enodes  (cost  7 )
0.072 * * [simplify]: Extracting # 0 : cost  0
0.072 * * [simplify]: Extracting # 1 : cost  0
0.072 * * [simplify]: Extracting # 2 : cost  0
0.073 * * [simplify]: Extracting # 3 : cost  0
0.073 * * [simplify]: Extracting # 4 : cost  0
0.073 * * [simplify]: iteration  4 :  200  enodes  (cost  7 )
0.142 * * [simplify]: Extracting # 0 : cost  0
0.143 * * [simplify]: Extracting # 1 : cost  0
0.143 * * [simplify]: Extracting # 2 : cost  0
0.144 * * [simplify]: Extracting # 3 : cost  0
0.144 * * [simplify]: Extracting # 4 : cost  0
0.145 * * [simplify]: Extracting # 5 : cost  0
0.145 * * [simplify]: iteration  5 :  611  enodes  (cost  7 )
0.642 * * [simplify]: Extracting # 0 : cost  0
0.645 * * [simplify]: Extracting # 1 : cost  0
0.647 * * [simplify]: Extracting # 2 : cost  0
0.650 * * [simplify]: Extracting # 3 : cost  0
0.652 * * [simplify]: Extracting # 4 : cost  0
0.654 * * [simplify]: iteration  6 :  2916  enodes  (cost  7 )
1.684 * * [simplify]: Extracting # 0 : cost  0
1.689 * * [simplify]: Extracting # 1 : cost  0
1.694 * * [simplify]: Extracting # 2 : cost  0
1.704 * * [simplify]: Extracting # 3 : cost  0
1.708 * * [simplify]: Extracting # 4 : cost  0
1.713 * * [simplify]: iteration done:  5000  enodes  (cost  7 )
1.713 * [simplify]: Simplified to:
  (- (pow x 4.0) (pow y 4.0))
1.713 * * [progress]: iteration 1 / 4
1.713 * * * [progress]: picking best candidate
1.715 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 4.0) (pow y 4.0)))>
1.715 * * * [progress]: localizing error
1.721 * * * [progress]: generating rewritten candidates
1.721 * * * [progress]: generating series expansions
1.722 * * * [progress]: simplifying candidates
1.722 * [simplify]: Simplifying:
  
1.722 * * [simplify]: Extracting # 0 : cost  0
1.722 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
1.722 * * [simplify]: Extracting # 0 : cost  0
1.722 * * [simplify]: iteration done:  0  enodes  (cost  0 )
1.722 * [simplify]: Simplified to:
  
1.722 * * * [progress]: adding candidates to table
1.722 * [progress]: [Phase 3 of 3] Extracting.
1.725 * [simplify]: Simplifying:
  (- (pow x 4.0) (pow y 4.0))
1.725 * * [simplify]: Extracting # 0 : cost  0
1.725 * * [simplify]: Extracting # 1 : cost  0
1.725 * * [simplify]: Extracting # 2 : cost  0
1.725 * * [simplify]: Extracting # 3 : cost  0
1.725 * * [simplify]: Extracting # 4 : cost  0
1.725 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
1.725 * * [simplify]: Extracting # 0 : cost  0
1.725 * * [simplify]: iteration done:  6  enodes  (cost  7 )
1.725 * [simplify]: Simplified to:
  (- (pow x 4.0) (pow y 4.0))
2.868 * [regime-testing]: End program error score: 0.0026253281660207524