13.269 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.018 * * * [progress]: [2/2] Setting up program.
0.019 * [progress]: [Phase 2 of 3] Improving.
0.019 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (* x x) (* y y))
0.021 * * [simplify]: iteration  0 :  10  enodes  (cost  3 )
0.023 * * [simplify]: iteration  1 :  17  enodes  (cost  3 )
0.024 * * [simplify]: iteration  2 :  32  enodes  (cost  3 )
0.025 * * [simplify]: iteration  3 :  58  enodes  (cost  3 )
0.027 * * [simplify]: iteration  4 :  129  enodes  (cost  3 )
0.029 * * [simplify]: iteration  5 :  207  enodes  (cost  3 )
0.032 * * [simplify]: iteration  6 :  393  enodes  (cost  3 )
0.041 * * [simplify]: iteration  7 :  1794  enodes  (cost  3 )
0.091 * * [simplify]: iteration  8 :  5001  enodes  (cost  3 )
0.092 * [simplify]: Simplified to:
   (- (* x x) (* y y))
0.092 * * [progress]: iteration 1 / 4
0.092 * * * [progress]: picking best candidate
0.093 * * * * [pick]: Picked  #<alt (λ (x y) (- (* x x) (* y y)))>
0.093 * * * [progress]: localizing error
0.097 * * * [progress]: generating rewritten candidates
0.097 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.100 * * * [progress]: generating series expansions
0.100 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.100 * [approximate]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in (x y) around 0
0.100 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in y
0.100 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.100 * [taylor]: Taking taylor expansion of x in y
0.100 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.100 * [taylor]: Taking taylor expansion of y in y
0.100 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
0.100 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.100 * [taylor]: Taking taylor expansion of x in x
0.100 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.100 * [taylor]: Taking taylor expansion of y in x
0.100 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
0.100 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.100 * [taylor]: Taking taylor expansion of x in x
0.100 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.100 * [taylor]: Taking taylor expansion of y in x
0.101 * [taylor]: Taking taylor expansion of (- (pow y 2)) in y
0.101 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.101 * [taylor]: Taking taylor expansion of y in y
0.102 * [taylor]: Taking taylor expansion of 0 in y
0.102 * [taylor]: Taking taylor expansion of 1 in y
0.104 * [taylor]: Taking taylor expansion of 0 in y
0.106 * [taylor]: Taking taylor expansion of 0 in y
0.107 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in (x y) around 0
0.107 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
0.107 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.107 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.107 * [taylor]: Taking taylor expansion of x in y
0.107 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.107 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.107 * [taylor]: Taking taylor expansion of y in y
0.107 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.107 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.107 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.107 * [taylor]: Taking taylor expansion of x in x
0.108 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.108 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.108 * [taylor]: Taking taylor expansion of y in x
0.108 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.108 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.108 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.108 * [taylor]: Taking taylor expansion of x in x
0.109 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.109 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.109 * [taylor]: Taking taylor expansion of y in x
0.109 * [taylor]: Taking taylor expansion of 1 in y
0.110 * [taylor]: Taking taylor expansion of 0 in y
0.114 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
0.114 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.114 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.114 * [taylor]: Taking taylor expansion of y in y
0.116 * [taylor]: Taking taylor expansion of 0 in y
0.119 * [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
0.122 * [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
0.122 * [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
0.131 * [taylor]: Taking taylor expansion of 0 in y
0.132 * * * [progress]: simplifying candidates
0.132 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (/ (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))
0.135 * * [simplify]: iteration  0 :  93  enodes  (cost  83 )
0.137 * * [simplify]: iteration  1 :  375  enodes  (cost  72 )
0.144 * * [simplify]: iteration  2 :  1243  enodes  (cost  72 )
0.168 * * [simplify]: iteration  3 :  5001  enodes  (cost  72 )
0.169 * [simplify]: Simplified to:
   (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)))
  (- (pow (* x x) 3) (pow (* y y) 3))
  (+ (+ (pow x 4) (* (* x x) (* y y))) (pow y 4))
  (- (* y y))
  (+ (* (- (pow y 3)) y) (pow x 4))
  (+ (* x x) (* y y))
  (+ x y)
  (- x y)
  (- (* y y))
  (- (* x x) (* y y))
  (- (* x x) (* y y))
  (- (* x x) (* y y))
0.169 * * * [progress]: adding candidates to table
0.192 * * [progress]: iteration 2 / 4
0.192 * * * [progress]: picking best candidate
0.193 * * * * [pick]: Picked  #<alt (λ (x y) (* (+ x y) (- x y)))>
0.193 * * * [progress]: localizing error
0.197 * * * [progress]: generating rewritten candidates
0.197 * * * [progress]: generating series expansions
0.197 * * * [progress]: simplifying candidates
0.197 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   
0.200 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
0.200 * [simplify]: Simplified to:
   
0.200 * * * [progress]: adding candidates to table
0.200 * [progress]: [Phase 3 of 3] Extracting.
0.201 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* (+ x y) (- x y))
0.201 * * [simplify]: iteration  0 :  7  enodes  (cost  3 )
0.202 * * [simplify]: iteration  1 :  7  enodes  (cost  3 )
0.202 * [simplify]: Simplified to:
   (* (+ x y) (- x y))
0.736 * [regime-testing]: End program error score: 0.001375171896487061