11.510 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.025 * * * [progress]: [2/2] Setting up program.
0.027 * [progress]: [Phase 2 of 3] Improving.
0.027 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* (+ x y) (- x y))
0.028 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
0.028 * * [simplify]: iteration  1 :  9  enodes  (cost  7 )
0.030 * * [simplify]: iteration  2 :  24  enodes  (cost  7 )
0.034 * * [simplify]: iteration  3 :  52  enodes  (cost  7 )
0.043 * * [simplify]: iteration  4 :  93  enodes  (cost  7 )
0.071 * * [simplify]: iteration  5 :  146  enodes  (cost  7 )
0.113 * * [simplify]: iteration  6 :  211  enodes  (cost  7 )
0.184 * * [simplify]: iteration  7 :  323  enodes  (cost  7 )
0.589 * * [simplify]: iteration  8 :  942  enodes  (cost  7 )
4.364 * * [simplify]: iteration  9 :  3249  enodes  (cost  7 )
7.171 * * [simplify]: iteration  done :  5000  enodes  (cost  7 )
7.171 * [simplify]: Simplified to:
   (- (* x x) (* y y))
7.182 * * [progress]: iteration 1 / 4
7.182 * * * [progress]: picking best candidate
7.184 * * * * [pick]: Picked  #<alt (λ (x y) (- (* x x) (* y y)))>
7.184 * * * [progress]: localizing error
7.189 * * * [progress]: generating rewritten candidates
7.189 * * * [progress]: generating series expansions
7.189 * * * [progress]: simplifying candidates
7.189 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   
7.189 * [simplify]: Simplified to:
   
7.189 * * * [progress]: adding candidates to table
7.189 * [progress]: [Phase 3 of 3] Extracting.
7.192 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (* x x) (* y y))
7.192 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
7.192 * * [simplify]: iteration  done :  5  enodes  (cost  7 )
7.192 * [simplify]: Simplified to:
   (- (* x x) (* y y))
8.170 * [regime-testing]: End program error score: 0.0075009376172021506