207.270 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.026 * * * [progress]: [2/2] Setting up program.
0.029 * [progress]: [Phase 2 of 3] Improving.
0.029 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (* a a) (* b b))
0.029 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
0.030 * * [simplify]: iteration  1 :  10  enodes  (cost  7 )
0.032 * * [simplify]: iteration  2 :  17  enodes  (cost  7 )
0.034 * * [simplify]: iteration  3 :  32  enodes  (cost  7 )
0.039 * * [simplify]: iteration  4 :  57  enodes  (cost  7 )
0.051 * * [simplify]: iteration  5 :  98  enodes  (cost  7 )
0.080 * * [simplify]: iteration  6 :  156  enodes  (cost  7 )
0.135 * * [simplify]: iteration  7 :  324  enodes  (cost  7 )
1.040 * * [simplify]: iteration  8 :  1576  enodes  (cost  7 )
7.375 * * [simplify]: iteration  done :  5000  enodes  (cost  7 )
7.375 * [simplify]: Simplified to:
   (* (- a b) (+ a b))
7.378 * * [progress]: iteration 1 / 4
7.378 * * * [progress]: picking best candidate
7.380 * * * * [pick]: Picked  #<alt (λ (a b) (- (* a a) (* b b)))>
7.380 * * * [progress]: localizing error
7.384 * * * [progress]: generating rewritten candidates
7.384 * * * [progress]: generating series expansions
7.384 * * * [progress]: simplifying candidates
7.385 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   
7.385 * [simplify]: Simplified to:
   
7.385 * * * [progress]: adding candidates to table
7.385 * [progress]: [Phase 3 of 3] Extracting.
7.387 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (* a a) (* b b))
7.387 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
7.388 * * [simplify]: iteration  done :  5  enodes  (cost  7 )
7.388 * [simplify]: Simplified to:
   (- (* a a) (* b b))
8.401 * [regime-testing]: End program error score: 0.0075009376172021506
8.468 * [regime-testing]: Target error score: 0.0007500937617202151