8.368 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.023 * * * [progress]: [2/2] Setting up program.
0.025 * [progress]: [Phase 2 of 3] Improving.
0.025 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (/ (* (- x y) (+ x y)) (+ (* x x) (* y y)))
0.027 * * [simplify]: iteration  0 :  22  enodes  (cost  7 )
0.029 * * [simplify]: iteration  1 :  48  enodes  (cost  7 )
0.030 * * [simplify]: iteration  2 :  104  enodes  (cost  7 )
0.033 * * [simplify]: iteration  3 :  196  enodes  (cost  7 )
0.036 * * [simplify]: iteration  4 :  359  enodes  (cost  7 )
0.042 * * [simplify]: iteration  5 :  686  enodes  (cost  7 )
0.052 * * [simplify]: iteration  6 :  1355  enodes  (cost  7 )
0.086 * * [simplify]: iteration  7 :  5001  enodes  (cost  7 )
0.086 * [simplify]: Simplified to:
   (/ (* (- x y) (+ x y)) (+ (* x x) (* y y)))
0.087 * * [progress]: iteration 1 / 4
0.087 * * * [progress]: picking best candidate
0.088 * * * * [pick]: Picked  #<alt (λ (x y) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))>
0.089 * * * [progress]: localizing error
0.097 * * * [progress]: generating rewritten candidates
0.097 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.110 * * * [progress]: generating series expansions
0.110 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.110 * [approximate]: Taking taylor expansion of (/ (* (+ x y) (- x y)) (+ (pow x 2) (pow y 2))) in (x y) around 0
0.110 * [taylor]: Taking taylor expansion of (/ (* (+ x y) (- x y)) (+ (pow x 2) (pow y 2))) in y
0.110 * [taylor]: Taking taylor expansion of (* (+ x y) (- x y)) in y
0.110 * [taylor]: Taking taylor expansion of (+ x y) in y
0.110 * [taylor]: Taking taylor expansion of x in y
0.110 * [taylor]: Taking taylor expansion of y in y
0.110 * [taylor]: Taking taylor expansion of (- x y) in y
0.110 * [taylor]: Taking taylor expansion of x in y
0.110 * [taylor]: Taking taylor expansion of y in y
0.110 * [taylor]: Taking taylor expansion of (+ (pow x 2) (pow y 2)) in y
0.110 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.110 * [taylor]: Taking taylor expansion of x in y
0.110 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.110 * [taylor]: Taking taylor expansion of y in y
0.111 * [taylor]: Taking taylor expansion of (/ (* (+ x y) (- x y)) (+ (pow x 2) (pow y 2))) in x
0.111 * [taylor]: Taking taylor expansion of (* (+ x y) (- x y)) in x
0.111 * [taylor]: Taking taylor expansion of (+ x y) in x
0.111 * [taylor]: Taking taylor expansion of x in x
0.111 * [taylor]: Taking taylor expansion of y in x
0.111 * [taylor]: Taking taylor expansion of (- x y) in x
0.111 * [taylor]: Taking taylor expansion of x in x
0.111 * [taylor]: Taking taylor expansion of y in x
0.111 * [taylor]: Taking taylor expansion of (+ (pow x 2) (pow y 2)) in x
0.111 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.111 * [taylor]: Taking taylor expansion of x in x
0.111 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.111 * [taylor]: Taking taylor expansion of y in x
0.112 * [taylor]: Taking taylor expansion of (/ (* (+ x y) (- x y)) (+ (pow x 2) (pow y 2))) in x
0.112 * [taylor]: Taking taylor expansion of (* (+ x y) (- x y)) in x
0.112 * [taylor]: Taking taylor expansion of (+ x y) in x
0.112 * [taylor]: Taking taylor expansion of x in x
0.112 * [taylor]: Taking taylor expansion of y in x
0.112 * [taylor]: Taking taylor expansion of (- x y) in x
0.112 * [taylor]: Taking taylor expansion of x in x
0.112 * [taylor]: Taking taylor expansion of y in x
0.112 * [taylor]: Taking taylor expansion of (+ (pow x 2) (pow y 2)) in x
0.112 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.112 * [taylor]: Taking taylor expansion of x in x
0.112 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.112 * [taylor]: Taking taylor expansion of y in x
0.112 * [taylor]: Taking taylor expansion of -1 in y
0.113 * [taylor]: Taking taylor expansion of 0 in y
0.115 * [taylor]: Taking taylor expansion of (* 2 (/ 1 (pow y 2))) in y
0.115 * [taylor]: Taking taylor expansion of 2 in y
0.115 * [taylor]: Taking taylor expansion of (/ 1 (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
0.121 * [taylor]: Taking taylor expansion of 0 in y
0.121 * [approximate]: Taking taylor expansion of (/ (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2)))) in (x y) around 0
0.121 * [taylor]: Taking taylor expansion of (/ (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2)))) in y
0.121 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in y
0.121 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in y
0.121 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.121 * [taylor]: Taking taylor expansion of x in y
0.121 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.121 * [taylor]: Taking taylor expansion of y in y
0.122 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in y
0.122 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.122 * [taylor]: Taking taylor expansion of y in y
0.122 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.122 * [taylor]: Taking taylor expansion of x in y
0.122 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
0.122 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.122 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.122 * [taylor]: Taking taylor expansion of x in y
0.122 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.122 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.122 * [taylor]: Taking taylor expansion of y in y
0.128 * [taylor]: Taking taylor expansion of (/ (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2)))) in x
0.128 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in x
0.128 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
0.128 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.128 * [taylor]: Taking taylor expansion of x in x
0.129 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.129 * [taylor]: Taking taylor expansion of y in x
0.129 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
0.129 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.129 * [taylor]: Taking taylor expansion of y in x
0.129 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.129 * [taylor]: Taking taylor expansion of x in x
0.129 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.129 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.129 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.129 * [taylor]: Taking taylor expansion of x in x
0.130 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.130 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.130 * [taylor]: Taking taylor expansion of y in x
0.131 * [taylor]: Taking taylor expansion of (/ (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2)))) in x
0.131 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in x
0.131 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
0.131 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.131 * [taylor]: Taking taylor expansion of x in x
0.132 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.132 * [taylor]: Taking taylor expansion of y in x
0.132 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
0.132 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.132 * [taylor]: Taking taylor expansion of y in x
0.132 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.132 * [taylor]: Taking taylor expansion of x in x
0.132 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.132 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.132 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.132 * [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
0.134 * [taylor]: Taking taylor expansion of 1 in y
0.137 * [taylor]: Taking taylor expansion of 0 in y
0.141 * [taylor]: Taking taylor expansion of (- (* 2 (/ 1 (pow y 2)))) in y
0.141 * [taylor]: Taking taylor expansion of (* 2 (/ 1 (pow y 2))) in y
0.141 * [taylor]: Taking taylor expansion of 2 in y
0.141 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.141 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.141 * [taylor]: Taking taylor expansion of y in y
0.149 * [taylor]: Taking taylor expansion of 0 in y
0.150 * [approximate]: Taking taylor expansion of (* -1 (/ (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))))) in (x y) around 0
0.150 * [taylor]: Taking taylor expansion of (* -1 (/ (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))))) in y
0.150 * [taylor]: Taking taylor expansion of -1 in y
0.150 * [taylor]: Taking taylor expansion of (/ (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2)))) in y
0.150 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) in y
0.150 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in y
0.150 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.150 * [taylor]: Taking taylor expansion of y in y
0.150 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.150 * [taylor]: Taking taylor expansion of x in y
0.150 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in y
0.150 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.150 * [taylor]: Taking taylor expansion of y in y
0.151 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.151 * [taylor]: Taking taylor expansion of x in y
0.151 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
0.151 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.151 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.151 * [taylor]: Taking taylor expansion of x in y
0.151 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.151 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.151 * [taylor]: Taking taylor expansion of y in y
0.153 * [taylor]: Taking taylor expansion of (* -1 (/ (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))))) in x
0.153 * [taylor]: Taking taylor expansion of -1 in x
0.153 * [taylor]: Taking taylor expansion of (/ (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2)))) in x
0.153 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) in x
0.153 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
0.153 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.153 * [taylor]: Taking taylor expansion of y in x
0.153 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.153 * [taylor]: Taking taylor expansion of x in x
0.153 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
0.153 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.153 * [taylor]: Taking taylor expansion of y in x
0.153 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.153 * [taylor]: Taking taylor expansion of x in x
0.153 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.153 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.153 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.153 * [taylor]: Taking taylor expansion of x in x
0.154 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.154 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.154 * [taylor]: Taking taylor expansion of y in x
0.156 * [taylor]: Taking taylor expansion of (* -1 (/ (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))))) in x
0.156 * [taylor]: Taking taylor expansion of -1 in x
0.156 * [taylor]: Taking taylor expansion of (/ (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) (+ (/ 1 (pow x 2)) (/ 1 (pow y 2)))) in x
0.156 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) in x
0.156 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
0.156 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.156 * [taylor]: Taking taylor expansion of y in x
0.156 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.156 * [taylor]: Taking taylor expansion of x in x
0.156 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
0.156 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.156 * [taylor]: Taking taylor expansion of y in x
0.156 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.156 * [taylor]: Taking taylor expansion of x in x
0.156 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
0.156 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.156 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.156 * [taylor]: Taking taylor expansion of x in x
0.157 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.157 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.157 * [taylor]: Taking taylor expansion of y in x
0.159 * [taylor]: Taking taylor expansion of 1 in y
0.162 * [taylor]: Taking taylor expansion of 0 in y
0.167 * [taylor]: Taking taylor expansion of (- (* 2 (/ 1 (pow y 2)))) in y
0.167 * [taylor]: Taking taylor expansion of (* 2 (/ 1 (pow y 2))) in y
0.167 * [taylor]: Taking taylor expansion of 2 in y
0.167 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.167 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.167 * [taylor]: Taking taylor expansion of y in y
0.176 * [taylor]: Taking taylor expansion of 0 in y
0.176 * * * [progress]: simplifying candidates
0.177 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (+ (log (- x y)) (log (+ x y))) (log (+ (* x x) (* y y))))
  (- (log (* (- x y) (+ x y))) (log (+ (* x x) (* y y))))
  (log (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (exp (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (/ (* (* (* (- x y) (- x y)) (- x y)) (* (* (+ x y) (+ x y)) (+ x y))) (* (* (+ (* x x) (* y y)) (+ (* x x) (* y y))) (+ (* x x) (* y y))))
  (/ (* (* (* (- x y) (+ x y)) (* (- x y) (+ x y))) (* (- x y) (+ x y))) (* (* (+ (* x x) (* y y)) (+ (* x x) (* y y))) (+ (* x x) (* y y))))
  (* (cbrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y)))) (cbrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y)))))
  (cbrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (* (* (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y)))) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (sqrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (sqrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (- (* (- x y) (+ x y)))
  (- (+ (* x x) (* y y)))
  (/ (- x y) (* (cbrt (+ (* x x) (* y y))) (cbrt (+ (* x x) (* y y)))))
  (/ (+ x y) (cbrt (+ (* x x) (* y y))))
  (/ (- x y) (sqrt (+ (* x x) (* y y))))
  (/ (+ x y) (sqrt (+ (* x x) (* y y))))
  (/ (- x y) 1)
  (/ (+ x y) (+ (* x x) (* y y)))
  (/ 1 (+ (* x x) (* y y)))
  (/ (+ (* x x) (* y y)) (* (- x y) (+ x y)))
  (/ (* (- x y) (+ x y)) (* (cbrt (+ (* x x) (* y y))) (cbrt (+ (* x x) (* y y)))))
  (/ (* (- x y) (+ x y)) (sqrt (+ (* x x) (* y y))))
  (/ (* (- x y) (+ x y)) 1)
  (/ (+ (* x x) (* y y)) (+ x y))
  (/ (* (- x y) (+ x y)) (+ (pow (* x x) 3) (pow (* y y) 3)))
  (/ (* (- x y) (+ x y)) (- (* (* x x) (* x x)) (* (* y y) (* y y))))
  (* (+ (* x x) (* y y)) (* (+ (* x x) (+ (* y y) (* x y))) (+ (* x x) (- (* y y) (* x y)))))
  (* (+ (* x x) (* y y)) (* (+ (* x x) (+ (* y y) (* x y))) (- x y)))
  (* (+ (* x x) (* y y)) (* (+ x y) (+ (* x x) (- (* y y) (* x y)))))
  (* (+ (* x x) (* y y)) (* (+ x y) (- x y)))
  (* (+ (* x x) (* y y)) (+ (* x x) (- (* y y) (* x y))))
  (* (+ (* x x) (* y y)) (- x y))
  (* (+ (* x x) (* y y)) (+ (* x x) (+ (* y y) (* x y))))
  (* (+ (* x x) (* y y)) (+ x y))
  -1
  1
  1
0.181 * * [simplify]: iteration  0 :  270  enodes  (cost  311 )
0.186 * * [simplify]: iteration  1 :  1434  enodes  (cost  265 )
0.211 * * [simplify]: iteration  2 :  5001  enodes  (cost  261 )
0.213 * [simplify]: Simplified to:
   (log (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (log (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (log (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (exp (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (pow (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))) 3)
  (pow (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))) 3)
  (* (cbrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y)))) (cbrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y)))))
  (cbrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (pow (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))) 3)
  (sqrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (sqrt (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))
  (* (- y x) (+ x y))
  (- (+ (* x x) (* y y)))
  (/ (- x y) (* (cbrt (+ (* x x) (* y y))) (cbrt (+ (* x x) (* y y)))))
  (/ (+ x y) (cbrt (+ (* x x) (* y y))))
  (/ (- x y) (sqrt (+ (* x x) (* y y))))
  (/ (+ x y) (sqrt (+ (* x x) (* y y))))
  (- x y)
  (/ (+ x y) (+ (* x x) (* y y)))
  (/ 1 (+ (* x x) (* y y)))
  (/ (+ (* x x) (* y y)) (* (- x y) (+ x y)))
  (/ (* (- x y) (+ x y)) (* (cbrt (+ (* x x) (* y y))) (cbrt (+ (* x x) (* y y)))))
  (/ (* (- x y) (+ x y)) (sqrt (+ (* x x) (* y y))))
  (* (- x y) (+ x y))
  (/ (+ (* x x) (* y y)) (+ x y))
  (/ (* (- x y) (+ x y)) (+ (pow (* x x) 3) (pow (* y y) 3)))
  (* (/ (+ x y) (- (/ (pow x 4) 1) (/ (pow y 4) 1))) (- x y))
  (* (* (+ (* y (- y x)) (* x x)) (+ (* y (+ y x)) (* x x))) (+ (* x x) (* y y)))
  (* (* (- x y) (+ (* y (+ y x)) (* x x))) (+ (* x x) (* y y)))
  (* (* (+ (* y (- y x)) (* x x)) (+ x y)) (+ (* x x) (* y y)))
  (- (/ (pow x 4) 1) (/ (pow y 4) 1))
  (* (+ (* y (- y x)) (* x x)) (+ (* x x) (* y y)))
  (* (+ (* x x) (* y y)) (- x y))
  (* (+ (* y (+ y x)) (* x x)) (+ (* x x) (* y y)))
  (* (+ (* x x) (* y y)) (+ x y))
  -1
  1
  1
0.213 * * * [progress]: adding candidates to table
0.276 * * [progress]: iteration 2 / 4
0.277 * * * [progress]: picking best candidate
0.278 * * * * [pick]: Picked  #<alt (λ (x y) -1)>
0.278 * * * [progress]: localizing error
0.279 * * * [progress]: generating rewritten candidates
0.279 * * * [progress]: generating series expansions
0.279 * * * [progress]: simplifying candidates
0.279 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   
0.281 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
0.281 * [simplify]: Simplified to:
   
0.281 * * * [progress]: adding candidates to table
0.281 * * [progress]: iteration 3 / 4
0.281 * * * [progress]: picking best candidate
0.282 * * * * [pick]: Picked  #<alt (λ (x y) 1)>
0.282 * * * [progress]: localizing error
0.282 * * * [progress]: generating rewritten candidates
0.282 * * * [progress]: generating series expansions
0.282 * * * [progress]: simplifying candidates
0.282 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   
0.284 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
0.284 * [simplify]: Simplified to:
   
0.285 * * * [progress]: adding candidates to table
0.285 * [progress]: [Phase 3 of 3] Extracting.
0.285 * * [regime]: Finding splitpoints for: (#<alt (λ (x y) 1)> #<alt (λ (x y) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))> #<alt (λ (x y) -1)>)
0.285 * * * [regime-changes]: Trying 3 branch expressions: ((/ (* (- x y) (+ x y)) (+ (* x x) (* y y))) y x)
0.285 * * * * [regimes]: Trying to branch on (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))) from (#<alt (λ (x y) 1)> #<alt (λ (x y) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))> #<alt (λ (x y) -1)>)
0.300 * * * * [regimes]: Trying to branch on y from (#<alt (λ (x y) 1)> #<alt (λ (x y) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))> #<alt (λ (x y) -1)>)
0.325 * * * * [regimes]: Trying to branch on x from (#<alt (λ (x y) 1)> #<alt (λ (x y) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))> #<alt (λ (x y) -1)>)
0.348 * * * [regime]: Found split indices: #<option (#s(si 2 39) #s(si 1 131) #s(si 0 212) #s(si 1 255))>
0.348 * [binary-search]: Improving bounds with binary search for y and (#<alt (λ (x y) 1)> #<alt (λ (x y) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))> #<alt (λ (x y) -1)>)
0.443 * [regimes]: Found splitpoints: (#s(sp 2 y -3.2036592240457095e+152) #s(sp 1 y -6.987457183095222e-161) #s(sp 0 y 1.7735426966161355e-162) #s(sp 1 y +nan.0)) , with alts (#<alt (λ (x y) 1)> #<alt (λ (x y) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))> #<alt (λ (x y) -1)>)
0.443 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (if (<= y -3.2036592240457095e+152) -1 (if (<= y -6.987457183095222e-161) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))) (if (<= y 1.7735426966161355e-162) 1 (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))))
0.444 * * [simplify]: iteration  0 :  28  enodes  (cost  14 )
0.444 * * [simplify]: iteration  1 :  28  enodes  (cost  14 )
0.444 * [simplify]: Simplified to:
   (if (<= y -3.2036592240457095e+152) -1 (if (<= y -6.987457183095222e-161) (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))) (if (<= y 1.7735426966161355e-162) 1 (/ (* (- x y) (+ x y)) (+ (* x x) (* y y))))))
1.121 * [regime-testing]: Baseline error score: 20.65314796951641
1.122 * [regime-testing]: Oracle error score: 0.4805667200810799
1.123 * [regime-testing]: End program error score: 5.249336975785925
1.153 * [regime-testing]: Target error score: 0.057807038383403675