25.199 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.021 * * * [progress]: [2/2] Setting up program.
0.022 * [progress]: [Phase 2 of 3] Improving.
0.022 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (* x x) (* y y))
0.025 * * [simplify]: iteration  0 :  11  enodes  (cost  3 )
0.026 * * [simplify]: iteration  1 :  18  enodes  (cost  3 )
0.027 * * [simplify]: iteration  2 :  35  enodes  (cost  3 )
0.029 * * [simplify]: iteration  3 :  67  enodes  (cost  3 )
0.031 * * [simplify]: iteration  4 :  163  enodes  (cost  3 )
0.033 * * [simplify]: iteration  5 :  294  enodes  (cost  3 )
0.037 * * [simplify]: iteration  6 :  541  enodes  (cost  3 )
0.047 * * [simplify]: iteration  7 :  2138  enodes  (cost  3 )
0.104 * * [simplify]: iteration  8 :  5001  enodes  (cost  3 )
0.104 * [simplify]: Simplified to:
   (- (* x x) (* y y))
0.105 * * [progress]: iteration 1 / 4
0.105 * * * [progress]: picking best candidate
0.106 * * * * [pick]: Picked  #<alt (λ (x y) (- (* x x) (* y y)))>
0.106 * * * [progress]: localizing error
0.110 * * * [progress]: generating rewritten candidates
0.110 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.114 * * * [progress]: generating series expansions
0.114 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.114 * [approximate]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in (x y) around 0
0.114 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in y
0.114 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.114 * [taylor]: Taking taylor expansion of x in y
0.114 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.114 * [taylor]: Taking taylor expansion of y in y
0.114 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
0.114 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.114 * [taylor]: Taking taylor expansion of x in x
0.114 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.114 * [taylor]: Taking taylor expansion of y in x
0.114 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
0.114 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.114 * [taylor]: Taking taylor expansion of x in x
0.114 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.114 * [taylor]: Taking taylor expansion of y in x
0.115 * [taylor]: Taking taylor expansion of (- (pow y 2)) in y
0.115 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.115 * [taylor]: Taking taylor expansion of y in y
0.115 * [taylor]: Taking taylor expansion of 0 in y
0.116 * [taylor]: Taking taylor expansion of 1 in y
0.118 * [taylor]: Taking taylor expansion of 0 in y
0.120 * [taylor]: Taking taylor expansion of 0 in y
0.121 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in (x y) around 0
0.121 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
0.121 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.121 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.121 * [taylor]: Taking taylor expansion of x in y
0.121 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.121 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.121 * [taylor]: Taking taylor expansion of y in y
0.121 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.121 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.121 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.121 * [taylor]: Taking taylor expansion of x in x
0.122 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.122 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.122 * [taylor]: Taking taylor expansion of y in x
0.122 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.122 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.122 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.122 * [taylor]: Taking taylor expansion of x in x
0.123 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.123 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.123 * [taylor]: Taking taylor expansion of y in x
0.123 * [taylor]: Taking taylor expansion of 1 in y
0.124 * [taylor]: Taking taylor expansion of 0 in y
0.125 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
0.125 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.125 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.125 * [taylor]: Taking taylor expansion of y in y
0.128 * [taylor]: Taking taylor expansion of 0 in y
0.130 * [taylor]: Taking taylor expansion of 0 in y
0.132 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in (x y) around 0
0.132 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
0.132 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.132 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.132 * [taylor]: Taking taylor expansion of x in y
0.132 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.132 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.132 * [taylor]: Taking taylor expansion of y in y
0.133 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.133 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.133 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.133 * [taylor]: Taking taylor expansion of x in x
0.133 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.133 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.133 * [taylor]: Taking taylor expansion of y in x
0.133 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.133 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.133 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.133 * [taylor]: Taking taylor expansion of x in x
0.134 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.134 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.134 * [taylor]: Taking taylor expansion of y in x
0.134 * [taylor]: Taking taylor expansion of 1 in y
0.135 * [taylor]: Taking taylor expansion of 0 in y
0.136 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
0.136 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.137 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.137 * [taylor]: Taking taylor expansion of y in y
0.139 * [taylor]: Taking taylor expansion of 0 in y
0.142 * [taylor]: Taking taylor expansion of 0 in y
0.143 * * * [progress]: simplifying candidates
0.144 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (fma x x (- (* y y)))
  (fma (- y) y (* y y))
  (expm1 (- (* x x) (* y y)))
  (log1p (- (* x x) (* y y)))
  (- (* y y))
  (/ (exp (* x x)) (exp (* y y)))
  (log (- (* x x) (* y y)))
  (exp (- (* x x) (* y y)))
  (* (cbrt (- (* x x) (* y y))) (cbrt (- (* x x) (* y y))))
  (cbrt (- (* x x) (* y y)))
  (* (* (- (* x x) (* y y)) (- (* x x) (* y y))) (- (* x x) (* y y)))
  (sqrt (- (* x x) (* y y)))
  (sqrt (- (* x x) (* y y)))
  (- (pow (* x x) 3) (pow (* y y) 3))
  (+ (* (* x x) (* x x)) (+ (* (* y y) (* y y)) (* (* x x) (* y y))))
  (- (* y y))
  (- (* (* x x) (* x x)) (* (* y y) (* y y)))
  (+ (* x x) (* y y))
  (+ x y)
  (- x y)
  (- (* y y))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
0.146 * * [simplify]: iteration  0 :  102  enodes  (cost  97 )
0.149 * * [simplify]: iteration  1 :  416  enodes  (cost  87 )
0.156 * * [simplify]: iteration  2 :  1403  enodes  (cost  84 )
0.182 * * [simplify]: iteration  3 :  5002  enodes  (cost  80 )
0.183 * [simplify]: Simplified to:
   (- (* x x) (* y y))
  0
  (expm1 (- (* x x) (* y y)))
  (log1p (- (* x x) (* y y)))
  (- (* y y))
  (exp (- (* x x) (* y y)))
  (log (- (* x x) (* y y)))
  (exp (- (* x x) (* y y)))
  (* (cbrt (- (* x x) (* y y))) (cbrt (- (* x x) (* y y))))
  (cbrt (- (* x x) (* y y)))
  (pow (- (* x x) (* y y)) 3)
  (sqrt (- (* x x) (* y y)))
  (sqrt (- (* x x) (* y y)))
  (fma (- (pow y 5)) y (pow x 6))
  (fma y (* y (fma x x (* y y))) (pow x 4))
  (- (* y y))
  (fma (- (pow y 3)) y (pow x 4))
  (fma x x (* y y))
  (+ x y)
  (- x y)
  (- (* y y))
  (- (* x x) (* y y))
  (- (* x x) (* y y))
  (- (* x x) (* y y))
0.183 * * * [progress]: adding candidates to table
0.213 * * [progress]: iteration 2 / 4
0.213 * * * [progress]: picking best candidate
0.214 * * * * [pick]: Picked  #<alt (λ (x y) (* (+ x y) (- x y)))>
0.214 * * * [progress]: localizing error
0.218 * * * [progress]: generating rewritten candidates
0.218 * * * [progress]: generating series expansions
0.218 * * * [progress]: simplifying candidates
0.218 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   
0.220 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
0.220 * [simplify]: Simplified to:
   
0.220 * * * [progress]: adding candidates to table
0.220 * [progress]: [Phase 3 of 3] Extracting.
0.221 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* (+ x y) (- x y))
0.222 * * [simplify]: iteration  0 :  7  enodes  (cost  3 )
0.222 * * [simplify]: iteration  1 :  7  enodes  (cost  3 )
0.222 * [simplify]: Simplified to:
   (* (+ x y) (- x y))
0.791 * [regime-testing]: End program error score: 0.001375171896487061