9.923 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.062 * * * [progress]: [2/2] Setting up program.
0.067 * [progress]: [Phase 2 of 3] Improving.
0.067 * [simplify]: Simplifying:
  (- (pow x 4.0) (pow y 4.0))
0.067 * * [simplify]: Extracting # 0 : cost  0
0.067 * * [simplify]: Extracting # 1 : cost  0
0.067 * * [simplify]: Extracting # 2 : cost  0
0.067 * * [simplify]: Extracting # 3 : cost  0
0.067 * * [simplify]: Extracting # 4 : cost  0
0.067 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
0.070 * * [simplify]: Extracting # 0 : cost  0
0.070 * * [simplify]: Extracting # 1 : cost  0
0.070 * * [simplify]: Extracting # 2 : cost  0
0.070 * * [simplify]: Extracting # 3 : cost  0
0.070 * * [simplify]: Extracting # 4 : cost  0
0.070 * * [simplify]: iteration  1 :  14  enodes  (cost  7 )
0.075 * * [simplify]: Extracting # 0 : cost  0
0.076 * * [simplify]: Extracting # 1 : cost  0
0.076 * * [simplify]: Extracting # 2 : cost  0
0.076 * * [simplify]: Extracting # 3 : cost  0
0.076 * * [simplify]: Extracting # 4 : cost  0
0.076 * * [simplify]: iteration  2 :  30  enodes  (cost  7 )
0.084 * * [simplify]: Extracting # 0 : cost  0
0.084 * * [simplify]: Extracting # 1 : cost  0
0.084 * * [simplify]: Extracting # 2 : cost  0
0.084 * * [simplify]: Extracting # 3 : cost  0
0.084 * * [simplify]: Extracting # 4 : cost  0
0.084 * * [simplify]: iteration  3 :  74  enodes  (cost  7 )
0.102 * * [simplify]: Extracting # 0 : cost  0
0.103 * * [simplify]: Extracting # 1 : cost  0
0.103 * * [simplify]: Extracting # 2 : cost  0
0.103 * * [simplify]: Extracting # 3 : cost  0
0.103 * * [simplify]: Extracting # 4 : cost  0
0.104 * * [simplify]: iteration  4 :  218  enodes  (cost  7 )
0.242 * * [simplify]: Extracting # 0 : cost  0
0.248 * * [simplify]: Extracting # 1 : cost  0
0.249 * * [simplify]: Extracting # 2 : cost  0
0.250 * * [simplify]: Extracting # 3 : cost  0
0.251 * * [simplify]: Extracting # 4 : cost  0
0.253 * * [simplify]: Extracting # 5 : cost  0
0.254 * * [simplify]: iteration  5 :  1141  enodes  (cost  7 )
1.203 * * [simplify]: Extracting # 0 : cost  0
1.211 * * [simplify]: Extracting # 1 : cost  0
1.217 * * [simplify]: Extracting # 2 : cost  0
1.223 * * [simplify]: Extracting # 3 : cost  0
1.228 * * [simplify]: Extracting # 4 : cost  0
1.233 * * [simplify]: iteration done:  5001  enodes  (cost  7 )
1.233 * [simplify]: Simplified to:
  (- (pow x 4.0) (pow y 4.0))
1.234 * * [progress]: iteration 1 / 4
1.234 * * * [progress]: picking best candidate
1.237 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 4.0) (pow y 4.0)))>
1.237 * * * [progress]: localizing error
1.249 * * * [progress]: generating rewritten candidates
1.250 * * * [progress]: generating series expansions
1.250 * * * [progress]: simplifying candidates
1.250 * [simplify]: Simplifying:
  
1.250 * * [simplify]: Extracting # 0 : cost  0
1.250 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
1.250 * * [simplify]: Extracting # 0 : cost  0
1.250 * * [simplify]: iteration done:  0  enodes  (cost  0 )
1.250 * [simplify]: Simplified to:
  
1.250 * * * [progress]: adding candidates to table
1.251 * [progress]: [Phase 3 of 3] Extracting.
1.254 * [simplify]: Simplifying:
  (- (pow x 4.0) (pow y 4.0))
1.254 * * [simplify]: Extracting # 0 : cost  0
1.254 * * [simplify]: Extracting # 1 : cost  0
1.254 * * [simplify]: Extracting # 2 : cost  0
1.254 * * [simplify]: Extracting # 3 : cost  0
1.254 * * [simplify]: Extracting # 4 : cost  0
1.254 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
1.255 * * [simplify]: Extracting # 0 : cost  0
1.255 * * [simplify]: iteration done:  6  enodes  (cost  7 )
1.255 * [simplify]: Simplified to:
  (- (pow x 4.0) (pow y 4.0))
3.558 * [regime-testing]: Baseline error score: 0.0029484888736993568
3.560 * [regime-testing]: Oracle error score: 0.0029484888736993568
3.560 * [regime-testing]: End program error score: 0.0029484888736993568