0.763 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.241 * * * [progress]: [2/2] Setting up program.
0.245 * [progress]: [Phase 2 of 3] Improving.
0.247 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* 0.5 (- (* x x) y))
0.680 * * [simplify]: iteration  0 :  228  enodes  (cost  7 )
0.680 * * [simplify]: iteration  1 :  228  enodes  (cost  7 )
0.681 * [simplify]: Simplified to:
   (* 0.5 (- (* x x) y))
0.683 * * [progress]: iteration 1 / 4
0.683 * * * [progress]: picking best candidate
0.685 * * * * [pick]: Picked  #<alt (λ (x y) (* 0.5 (- (* x x) y)))>
0.685 * * * [progress]: localizing error
0.692 * * * [progress]: generating rewritten candidates
0.692 * * * * [progress]: [ 1 / 1 ] rewriting at (2 2)
0.699 * * * [progress]: generating series expansions
0.699 * * * * [progress]: [ 1 / 1 ] generating series at (2 2)
0.714 * [approximate]: Taking taylor expansion of (- (pow x 2) y) in (x y) around 0
0.715 * [taylor]: Taking taylor expansion of (- (pow x 2) y) in y
0.715 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.715 * [taylor]: Taking taylor expansion of x in y
0.715 * [taylor]: Taking taylor expansion of y in y
0.715 * [taylor]: Taking taylor expansion of (- (pow x 2) y) in x
0.715 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.715 * [taylor]: Taking taylor expansion of x in x
0.715 * [taylor]: Taking taylor expansion of y in x
0.715 * [taylor]: Taking taylor expansion of (- (pow x 2) y) in x
0.715 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.715 * [taylor]: Taking taylor expansion of x in x
0.715 * [taylor]: Taking taylor expansion of y in x
0.716 * [taylor]: Taking taylor expansion of (neg y) in y
0.716 * [taylor]: Taking taylor expansion of y in y
0.716 * [taylor]: Taking taylor expansion of 0 in y
0.716 * [taylor]: Taking taylor expansion of 1 in y
0.717 * [taylor]: Taking taylor expansion of 0 in y
0.717 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in (x y) around 0
0.717 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in y
0.717 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.717 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.717 * [taylor]: Taking taylor expansion of x in y
0.717 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.717 * [taylor]: Taking taylor expansion of y in y
0.717 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in x
0.717 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.718 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.718 * [taylor]: Taking taylor expansion of x in x
0.718 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.718 * [taylor]: Taking taylor expansion of y in x
0.718 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in x
0.718 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.718 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.718 * [taylor]: Taking taylor expansion of x in x
0.718 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.718 * [taylor]: Taking taylor expansion of y in x
0.718 * [taylor]: Taking taylor expansion of 1 in y
0.718 * [taylor]: Taking taylor expansion of 0 in y
0.718 * [taylor]: Taking taylor expansion of (neg (/ 1 y)) in y
0.718 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.718 * [taylor]: Taking taylor expansion of y in y
0.719 * [taylor]: Taking taylor expansion of 0 in y
0.719 * [taylor]: Taking taylor expansion of 0 in y
0.720 * [approximate]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in (x y) around 0
0.720 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in y
0.720 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.720 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.720 * [taylor]: Taking taylor expansion of x in y
0.720 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.720 * [taylor]: Taking taylor expansion of y in y
0.720 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in x
0.720 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.720 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.720 * [taylor]: Taking taylor expansion of x in x
0.720 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.720 * [taylor]: Taking taylor expansion of y in x
0.720 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in x
0.720 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.720 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.720 * [taylor]: Taking taylor expansion of x in x
0.720 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.720 * [taylor]: Taking taylor expansion of y in x
0.720 * [taylor]: Taking taylor expansion of 1 in y
0.720 * [taylor]: Taking taylor expansion of 0 in y
0.720 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.720 * [taylor]: Taking taylor expansion of y in y
0.721 * [taylor]: Taking taylor expansion of 0 in y
0.721 * [taylor]: Taking taylor expansion of 0 in y
0.721 * * * [progress]: simplifying candidates
0.722 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (/ (exp (* x x)) (exp y))
  (log (- (* x x) y))
  (exp (- (* x x) y))
  (* (cbrt (- (* x x) y)) (cbrt (- (* x x) y)))
  (cbrt (- (* x x) y))
  (* (* (- (* x x) y) (- (* x x) y)) (- (* x x) y))
  (sqrt (- (* x x) y))
  (sqrt (- (* x x) y))
  (- (pow (* x x) 3) (pow y 3))
  (+ (* (* x x) (* x x)) (+ (* y y) (* (* x x) y)))
  (neg y)
  (- (* (* x x) (* x x)) (* y y))
  (+ (* x x) y)
  (+ x (sqrt y))
  (- x (sqrt y))
  (- (pow x 2) y)
  (- (pow x 2) y)
  (- (pow x 2) y)
0.768 * * [simplify]: iteration  0 :  4808  enodes  (cost  111 )
0.768 * * [simplify]: iteration  1 :  4808  enodes  (cost  111 )
0.770 * [simplify]: Simplified to:
   (exp (- (* x x) y))
  (log (- (* x x) y))
  (exp (- (* x x) y))
  (* (cbrt (- (* x x) y)) (cbrt (- (* x x) y)))
  (cbrt (- (* x x) y))
  (pow (- (* x x) y) 3)
  (sqrt (- (* x x) y))
  (sqrt (- (* x x) y))
  (- (pow x 6) (pow y 3))
  (+ (pow x 4) (* y (+ (* x x) y)))
  (neg y)
  (- (pow x 4) (* y y))
  (+ (* x x) y)
  (+ x (sqrt y))
  (- x (sqrt y))
  (- (* x x) y)
  (- (* x x) y)
  (- (* x x) y)
0.770 * * * [progress]: adding candidates to table
0.787 * * [progress]: iteration 2 / 4
0.787 * * * [progress]: picking best candidate
0.790 * * * * [pick]: Picked  #<alt (λ (x y) (* 0.5 (/ (- (pow x 4) (* y y)) (+ (* x x) y))))>
0.790 * * * [progress]: localizing error
0.800 * * * [progress]: generating rewritten candidates
0.800 * * * * [progress]: [ 1 / 2 ] rewriting at (2 2)
0.809 * * * * [progress]: [ 2 / 2 ] rewriting at (2 2 1)
0.815 * * * [progress]: generating series expansions
0.815 * * * * [progress]: [ 1 / 2 ] generating series at (2 2)
0.816 * [approximate]: Taking taylor expansion of (/ (- (pow x 4) (pow y 2)) (+ (pow x 2) y)) in (x y) around 0
0.816 * [taylor]: Taking taylor expansion of (/ (- (pow x 4) (pow y 2)) (+ (pow x 2) y)) in y
0.816 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in y
0.816 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.816 * [taylor]: Taking taylor expansion of x in y
0.816 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.816 * [taylor]: Taking taylor expansion of y in y
0.816 * [taylor]: Taking taylor expansion of (+ (pow x 2) y) in y
0.816 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.816 * [taylor]: Taking taylor expansion of x in y
0.816 * [taylor]: Taking taylor expansion of y in y
0.816 * [taylor]: Taking taylor expansion of (/ (- (pow x 4) (pow y 2)) (+ (pow x 2) y)) in x
0.816 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in x
0.816 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.816 * [taylor]: Taking taylor expansion of x in x
0.816 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.816 * [taylor]: Taking taylor expansion of y in x
0.816 * [taylor]: Taking taylor expansion of (+ (pow x 2) y) in x
0.816 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.816 * [taylor]: Taking taylor expansion of x in x
0.817 * [taylor]: Taking taylor expansion of y in x
0.817 * [taylor]: Taking taylor expansion of (/ (- (pow x 4) (pow y 2)) (+ (pow x 2) y)) in x
0.817 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in x
0.817 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.817 * [taylor]: Taking taylor expansion of x in x
0.817 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.817 * [taylor]: Taking taylor expansion of y in x
0.817 * [taylor]: Taking taylor expansion of (+ (pow x 2) y) in x
0.817 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.817 * [taylor]: Taking taylor expansion of x in x
0.817 * [taylor]: Taking taylor expansion of y in x
0.817 * [taylor]: Taking taylor expansion of (* -1 y) in y
0.817 * [taylor]: Taking taylor expansion of -1 in y
0.817 * [taylor]: Taking taylor expansion of y in y
0.818 * [taylor]: Taking taylor expansion of 0 in y
0.818 * [taylor]: Taking taylor expansion of 1 in y
0.818 * [taylor]: Taking taylor expansion of 0 in y
0.819 * [approximate]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (+ (/ 1 (pow x 2)) (/ 1 y))) in (x y) around 0
0.819 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (+ (/ 1 (pow x 2)) (/ 1 y))) in y
0.819 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.819 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.819 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.819 * [taylor]: Taking taylor expansion of x in y
0.819 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.819 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.819 * [taylor]: Taking taylor expansion of y in y
0.819 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in y
0.819 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.819 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.819 * [taylor]: Taking taylor expansion of x in y
0.819 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.819 * [taylor]: Taking taylor expansion of y in y
0.819 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (+ (/ 1 (pow x 2)) (/ 1 y))) in x
0.819 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.819 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.819 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.819 * [taylor]: Taking taylor expansion of x in x
0.819 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.819 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.819 * [taylor]: Taking taylor expansion of y in x
0.819 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in x
0.819 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.819 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.819 * [taylor]: Taking taylor expansion of x in x
0.820 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.820 * [taylor]: Taking taylor expansion of y in x
0.820 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (+ (/ 1 (pow x 2)) (/ 1 y))) in x
0.820 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.820 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.820 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.820 * [taylor]: Taking taylor expansion of x in x
0.820 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.820 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.820 * [taylor]: Taking taylor expansion of y in x
0.820 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in x
0.820 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.820 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.820 * [taylor]: Taking taylor expansion of x in x
0.820 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.820 * [taylor]: Taking taylor expansion of y in x
0.820 * [taylor]: Taking taylor expansion of 1 in y
0.820 * [taylor]: Taking taylor expansion of 0 in y
0.821 * [taylor]: Taking taylor expansion of (neg (/ 1 y)) in y
0.821 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.821 * [taylor]: Taking taylor expansion of y in y
0.821 * [taylor]: Taking taylor expansion of 0 in y
0.822 * [taylor]: Taking taylor expansion of 0 in y
0.822 * [approximate]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (- (/ 1 (pow x 2)) (/ 1 y))) in (x y) around 0
0.822 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (- (/ 1 (pow x 2)) (/ 1 y))) in y
0.822 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.822 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.822 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.822 * [taylor]: Taking taylor expansion of x in y
0.822 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.822 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.822 * [taylor]: Taking taylor expansion of y in y
0.822 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in y
0.822 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.822 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.822 * [taylor]: Taking taylor expansion of x in y
0.823 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.823 * [taylor]: Taking taylor expansion of y in y
0.823 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (- (/ 1 (pow x 2)) (/ 1 y))) in x
0.823 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.823 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.823 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.823 * [taylor]: Taking taylor expansion of x in x
0.823 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.823 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.823 * [taylor]: Taking taylor expansion of y in x
0.823 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in x
0.823 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.823 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.823 * [taylor]: Taking taylor expansion of x in x
0.823 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.823 * [taylor]: Taking taylor expansion of y in x
0.823 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (- (/ 1 (pow x 2)) (/ 1 y))) in x
0.823 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.823 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.823 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.823 * [taylor]: Taking taylor expansion of x in x
0.823 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.823 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.823 * [taylor]: Taking taylor expansion of y in x
0.823 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in x
0.823 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.823 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.823 * [taylor]: Taking taylor expansion of x in x
0.823 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.823 * [taylor]: Taking taylor expansion of y in x
0.823 * [taylor]: Taking taylor expansion of 1 in y
0.824 * [taylor]: Taking taylor expansion of 0 in y
0.824 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.824 * [taylor]: Taking taylor expansion of y in y
0.824 * [taylor]: Taking taylor expansion of 0 in y
0.825 * [taylor]: Taking taylor expansion of 0 in y
0.825 * * * * [progress]: [ 2 / 2 ] generating series at (2 2 1)
0.825 * [approximate]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in (x y) around 0
0.825 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in y
0.825 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.825 * [taylor]: Taking taylor expansion of x in y
0.825 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.825 * [taylor]: Taking taylor expansion of y in y
0.825 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in x
0.825 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.825 * [taylor]: Taking taylor expansion of x in x
0.826 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.826 * [taylor]: Taking taylor expansion of y in x
0.826 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in x
0.826 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.826 * [taylor]: Taking taylor expansion of x in x
0.826 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.826 * [taylor]: Taking taylor expansion of y in x
0.826 * [taylor]: Taking taylor expansion of (neg (pow y 2)) in y
0.826 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.826 * [taylor]: Taking taylor expansion of y in y
0.826 * [taylor]: Taking taylor expansion of 0 in y
0.826 * [taylor]: Taking taylor expansion of 0 in y
0.826 * [taylor]: Taking taylor expansion of 0 in y
0.826 * [taylor]: Taking taylor expansion of 1 in y
0.826 * [taylor]: Taking taylor expansion of 0 in y
0.827 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in (x y) around 0
0.827 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.827 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.827 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.827 * [taylor]: Taking taylor expansion of x in y
0.827 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.827 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.827 * [taylor]: Taking taylor expansion of y in y
0.827 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.827 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.827 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.827 * [taylor]: Taking taylor expansion of x in x
0.827 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.827 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.827 * [taylor]: Taking taylor expansion of y in x
0.827 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.827 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.827 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.827 * [taylor]: Taking taylor expansion of x in x
0.827 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.827 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.827 * [taylor]: Taking taylor expansion of y in x
0.827 * [taylor]: Taking taylor expansion of 1 in y
0.828 * [taylor]: Taking taylor expansion of 0 in y
0.828 * [taylor]: Taking taylor expansion of 0 in y
0.828 * [taylor]: Taking taylor expansion of 0 in y
0.828 * [taylor]: Taking taylor expansion of (neg (/ 1 (pow y 2))) in y
0.828 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.828 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.828 * [taylor]: Taking taylor expansion of y in y
0.829 * [taylor]: Taking taylor expansion of 0 in y
0.829 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in (x y) around 0
0.829 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.829 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.829 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.829 * [taylor]: Taking taylor expansion of x in y
0.829 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.829 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.829 * [taylor]: Taking taylor expansion of y in y
0.829 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.829 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.829 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.829 * [taylor]: Taking taylor expansion of x in x
0.829 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.829 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.830 * [taylor]: Taking taylor expansion of y in x
0.830 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.830 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.830 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.830 * [taylor]: Taking taylor expansion of x in x
0.830 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.830 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.830 * [taylor]: Taking taylor expansion of y in x
0.830 * [taylor]: Taking taylor expansion of 1 in y
0.830 * [taylor]: Taking taylor expansion of 0 in y
0.830 * [taylor]: Taking taylor expansion of 0 in y
0.830 * [taylor]: Taking taylor expansion of 0 in y
0.831 * [taylor]: Taking taylor expansion of (neg (/ 1 (pow y 2))) in y
0.831 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.831 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.831 * [taylor]: Taking taylor expansion of y in y
0.831 * [taylor]: Taking taylor expansion of 0 in y
0.831 * * * [progress]: simplifying candidates
0.832 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (log (- (pow x 4) (* y y))) (log (+ (* x x) y)))
  (log (/ (- (pow x 4) (* y y)) (+ (* x x) y)))
  (exp (/ (- (pow x 4) (* y y)) (+ (* x x) y)))
  (/ (* (* (- (pow x 4) (* y y)) (- (pow x 4) (* y y))) (- (pow x 4) (* y y))) (* (* (+ (* x x) y) (+ (* x x) y)) (+ (* x x) y)))
  (* (cbrt (/ (- (pow x 4) (* y y)) (+ (* x x) y))) (cbrt (/ (- (pow x 4) (* y y)) (+ (* x x) y))))
  (cbrt (/ (- (pow x 4) (* y y)) (+ (* x x) y)))
  (* (* (/ (- (pow x 4) (* y y)) (+ (* x x) y)) (/ (- (pow x 4) (* y y)) (+ (* x x) y))) (/ (- (pow x 4) (* y y)) (+ (* x x) y)))
  (sqrt (/ (- (pow x 4) (* y y)) (+ (* x x) y)))
  (sqrt (/ (- (pow x 4) (* y y)) (+ (* x x) y)))
  (neg (- (pow x 4) (* y y)))
  (neg (+ (* x x) y))
  (/ (pow x 4) (+ (* x x) y))
  (/ (* y y) (+ (* x x) y))
  (/ (* (cbrt (- (pow x 4) (* y y))) (cbrt (- (pow x 4) (* y y)))) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (cbrt (- (pow x 4) (* y y))) (cbrt (+ (* x x) y)))
  (/ (* (cbrt (- (pow x 4) (* y y))) (cbrt (- (pow x 4) (* y y)))) (sqrt (+ (* x x) y)))
  (/ (cbrt (- (pow x 4) (* y y))) (sqrt (+ (* x x) y)))
  (/ (* (cbrt (- (pow x 4) (* y y))) (cbrt (- (pow x 4) (* y y)))) 1)
  (/ (cbrt (- (pow x 4) (* y y))) (+ (* x x) y))
  (/ (sqrt (- (pow x 4) (* y y))) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (sqrt (- (pow x 4) (* y y))) (cbrt (+ (* x x) y)))
  (/ (sqrt (- (pow x 4) (* y y))) (sqrt (+ (* x x) y)))
  (/ (sqrt (- (pow x 4) (* y y))) (sqrt (+ (* x x) y)))
  (/ (sqrt (- (pow x 4) (* y y))) 1)
  (/ (sqrt (- (pow x 4) (* y y))) (+ (* x x) y))
  (/ 1 (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (- (pow x 4) (* y y)) (cbrt (+ (* x x) y)))
  (/ 1 (sqrt (+ (* x x) y)))
  (/ (- (pow x 4) (* y y)) (sqrt (+ (* x x) y)))
  (/ 1 1)
  (/ (- (pow x 4) (* y y)) (+ (* x x) y))
  (/ (+ (pow (sqrt x) 4) y) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (- (pow (sqrt x) 4) y) (cbrt (+ (* x x) y)))
  (/ (+ (pow (sqrt x) 4) y) (sqrt (+ (* x x) y)))
  (/ (- (pow (sqrt x) 4) y) (sqrt (+ (* x x) y)))
  (/ (+ (pow (sqrt x) 4) y) 1)
  (/ (- (pow (sqrt x) 4) y) (+ (* x x) y))
  (/ (+ (sqrt (pow x 4)) y) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (- (sqrt (pow x 4)) y) (cbrt (+ (* x x) y)))
  (/ (+ (sqrt (pow x 4)) y) (sqrt (+ (* x x) y)))
  (/ (- (sqrt (pow x 4)) y) (sqrt (+ (* x x) y)))
  (/ (+ (sqrt (pow x 4)) y) 1)
  (/ (- (sqrt (pow x 4)) y) (+ (* x x) y))
  (/ (+ (pow x (/ 4 2)) y) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (- (pow x (/ 4 2)) y) (cbrt (+ (* x x) y)))
  (/ (+ (pow x (/ 4 2)) y) (sqrt (+ (* x x) y)))
  (/ (- (pow x (/ 4 2)) y) (sqrt (+ (* x x) y)))
  (/ (+ (pow x (/ 4 2)) y) 1)
  (/ (- (pow x (/ 4 2)) y) (+ (* x x) y))
  (/ 1 (+ (* x x) y))
  (/ (+ (* x x) y) (- (pow x 4) (* y y)))
  (/ (- (pow x 4) (* y y)) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (- (pow x 4) (* y y)) (sqrt (+ (* x x) y)))
  (/ (- (pow x 4) (* y y)) 1)
  (/ (+ (* x x) y) (cbrt (- (pow x 4) (* y y))))
  (/ (+ (* x x) y) (sqrt (- (pow x 4) (* y y))))
  (/ (+ (* x x) y) (- (pow x 4) (* y y)))
  (/ (+ (* x x) y) (- (pow (sqrt x) 4) y))
  (/ (+ (* x x) y) (- (sqrt (pow x 4)) y))
  (/ (+ (* x x) y) (- (pow x (/ 4 2)) y))
  (/ (- (pow x 4) (* y y)) (+ (pow (* x x) 3) (pow y 3)))
  (/ (- (pow x 4) (* y y)) (- (* (* x x) (* x x)) (* y y)))
  (* (+ (* x x) y) (+ (* (pow x 4) (pow x 4)) (+ (* (* y y) (* y y)) (* (pow x 4) (* y y)))))
  (* (+ (* x x) y) (+ (pow x 4) (* y y)))
  (/ (exp (pow x 4)) (exp (* y y)))
  (log (- (pow x 4) (* y y)))
  (exp (- (pow x 4) (* y y)))
  (* (cbrt (- (pow x 4) (* y y))) (cbrt (- (pow x 4) (* y y))))
  (cbrt (- (pow x 4) (* y y)))
  (* (* (- (pow x 4) (* y y)) (- (pow x 4) (* y y))) (- (pow x 4) (* y y)))
  (sqrt (- (pow x 4) (* y y)))
  (sqrt (- (pow x 4) (* y y)))
  (- (pow (pow x 4) 3) (pow (* y y) 3))
  (+ (* (pow x 4) (pow x 4)) (+ (* (* y y) (* y y)) (* (pow x 4) (* y y))))
  (neg (* y y))
  (- (* (pow x 4) (pow x 4)) (* (* y y) (* y y)))
  (+ (pow x 4) (* y y))
  (+ (pow (sqrt x) 4) y)
  (- (pow (sqrt x) 4) y)
  (+ (sqrt (pow x 4)) y)
  (- (sqrt (pow x 4)) y)
  (+ (pow x (/ 4 2)) y)
  (- (pow x (/ 4 2)) y)
  (- (pow x 2) y)
  (- (pow x 2) y)
  (- (pow x 2) y)
  (- (pow x 4) (pow y 2))
  (- (pow x 4) (pow y 2))
  (- (pow x 4) (pow y 2))
0.877 * * [simplify]: iteration  0 :  4917  enodes  (cost  932 )
0.877 * * [simplify]: iteration  1 :  4917  enodes  (cost  932 )
0.880 * [simplify]: Simplified to:
   (log (- (* x x) y))
  (log (- (* x x) y))
  (exp (- (* x x) y))
  (pow (- (* x x) y) 3)
  (* (cbrt (- (* x x) y)) (cbrt (- (* x x) y)))
  (cbrt (- (* x x) y))
  (pow (- (* x x) y) 3)
  (sqrt (- (* x x) y))
  (sqrt (- (* x x) y))
  (- (* y y) (pow x 4))
  (- (neg y) (* x x))
  (/ (pow x 4) (+ y (* x x)))
  (* y (/ y (+ y (* x x))))
  (* (cbrt (- (pow x 4) (* y y))) (/ (cbrt (- (pow x 4) (* y y))) (* (cbrt (+ y (* x x))) (cbrt (+ y (* x x))))))
  (/ (cbrt (- (pow x 4) (* y y))) (cbrt (+ y (* x x))))
  (* (cbrt (- (pow x 4) (* y y))) (/ (cbrt (- (pow x 4) (* y y))) (sqrt (+ y (* x x)))))
  (/ (cbrt (- (pow x 4) (* y y))) (sqrt (+ y (* x x))))
  (* (cbrt (- (pow x 4) (* y y))) (cbrt (- (pow x 4) (* y y))))
  (/ (cbrt (- (pow x 4) (* y y))) (+ y (* x x)))
  (/ (sqrt (- (pow x 4) (* y y))) (* (cbrt (+ y (* x x))) (cbrt (+ y (* x x)))))
  (/ (sqrt (- (pow x 4) (* y y))) (cbrt (+ y (* x x))))
  (/ (sqrt (- (pow x 4) (* y y))) (sqrt (+ y (* x x))))
  (/ (sqrt (- (pow x 4) (* y y))) (sqrt (+ y (* x x))))
  (sqrt (- (pow x 4) (* y y)))
  (/ (sqrt (- (pow x 4) (* y y))) (+ y (* x x)))
  (/ 1 (* (cbrt (+ y (* x x))) (cbrt (+ y (* x x)))))
  (/ (- (pow x 4) (* y y)) (cbrt (+ y (* x x))))
  (/ 1 (sqrt (+ y (* x x))))
  (/ (- (pow x 4) (* y y)) (sqrt (+ y (* x x))))
  1
  (- (* x x) y)
  (/ (+ y (* x x)) (* (cbrt (+ y (* x x))) (cbrt (+ y (* x x)))))
  (/ (- (* x x) y) (cbrt (+ y (* x x))))
  (/ (+ y (* x x)) (sqrt (+ y (* x x))))
  (/ (- (* x x) y) (sqrt (+ y (* x x))))
  (+ y (* x x))
  (/ (- (* x x) y) (+ y (* x x)))
  (/ (+ y (sqrt (pow x 4))) (* (cbrt (+ y (* x x))) (cbrt (+ y (* x x)))))
  (/ (- (sqrt (pow x 4)) y) (cbrt (+ y (* x x))))
  (/ (+ y (sqrt (pow x 4))) (sqrt (+ y (* x x))))
  (/ (- (sqrt (pow x 4)) y) (sqrt (+ y (* x x))))
  (+ y (sqrt (pow x 4)))
  (/ (- (sqrt (pow x 4)) y) (+ y (* x x)))
  (/ (+ y (* x x)) (* (cbrt (+ y (* x x))) (cbrt (+ y (* x x)))))
  (/ (- (* x x) y) (cbrt (+ y (* x x))))
  (/ (+ y (* x x)) (sqrt (+ y (* x x))))
  (/ (- (* x x) y) (sqrt (+ y (* x x))))
  (+ y (* x x))
  (/ (- (* x x) y) (+ y (* x x)))
  (/ 1 (+ y (* x x)))
  (/ 1 (- (* x x) y))
  (/ (- (pow x 4) (* y y)) (* (cbrt (+ y (* x x))) (cbrt (+ y (* x x)))))
  (/ (- (pow x 4) (* y y)) (sqrt (+ y (* x x))))
  (- (pow x 4) (* y y))
  (/ (+ y (* x x)) (cbrt (- (pow x 4) (* y y))))
  (/ (+ y (* x x)) (sqrt (- (pow x 4) (* y y))))
  (/ 1 (- (* x x) y))
  (/ (+ y (* x x)) (- (* x x) y))
  (/ (+ y (* x x)) (- (sqrt (pow x 4)) y))
  (/ (+ y (* x x)) (- (* x x) y))
  (/ (- (pow x 4) (* y y)) (+ (pow x 6) (pow y 3)))
  1
  (* (+ y (* x x)) (+ (pow x 8) (+ (pow y 4) (* (pow x 4) (* y y)))))
  (* (+ y (* x x)) (+ (pow x 4) (* y y)))
  (exp (- (pow x 4) (* y y)))
  (log (- (pow x 4) (* y y)))
  (exp (- (pow x 4) (* y y)))
  (* (cbrt (- (pow x 4) (* y y))) (cbrt (- (pow x 4) (* y y))))
  (cbrt (- (pow x 4) (* y y)))
  (pow (- (pow x 4) (* y y)) 3)
  (sqrt (- (pow x 4) (* y y)))
  (sqrt (- (pow x 4) (* y y)))
  (- (pow x 12) (pow y 6))
  (+ (pow x 8) (+ (pow y 4) (* (pow x 4) (* y y))))
  (* y (neg y))
  (- (pow x 8) (pow y 4))
  (+ (pow x 4) (* y y))
  (+ y (* x x))
  (- (* x x) y)
  (+ y (sqrt (pow x 4)))
  (- (sqrt (pow x 4)) y)
  (+ y (* x x))
  (- (* x x) y)
  (- (* x x) y)
  (- (* x x) y)
  (- (* x x) y)
  (- (pow x 4) (* y y))
  (- (pow x 4) (* y y))
  (- (pow x 4) (* y y))
0.881 * * * [progress]: adding candidates to table
0.962 * [progress]: [Phase 3 of 3] Extracting.
0.962 * * [regime]: Finding splitpoints for: (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (- (pow x 4) (* y y)) (+ (* x x) y))))>)
0.963 * * * [regime-changes]: Trying 5 branch expressions: ((* x x) (- (* x x) y) (* 0.5 (- (* x x) y)) y x)
0.963 * * * * [regimes]: Trying to branch on (* x x) from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (- (pow x 4) (* y y)) (+ (* x x) y))))>)
0.995 * * * * [regimes]: Trying to branch on (- (* x x) y) from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (- (pow x 4) (* y y)) (+ (* x x) y))))>)
1.028 * * * * [regimes]: Trying to branch on (* 0.5 (- (* x x) y)) from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (- (pow x 4) (* y y)) (+ (* x x) y))))>)
1.061 * * * * [regimes]: Trying to branch on y from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (- (pow x 4) (* y y)) (+ (* x x) y))))>)
1.091 * * * * [regimes]: Trying to branch on x from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (- (pow x 4) (* y y)) (+ (* x x) y))))>)
1.123 * * * [regime]: Found split indices: #<option (#s(si 0 255))>
1.124 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* 0.5 (- (* x x) y))
1.125 * * [simplify]: iteration  0 :  17  enodes  (cost  7 )
1.125 * * [simplify]: iteration  1 :  17  enodes  (cost  7 )
1.125 * [simplify]: Simplified to:
   (* 0.5 (- (* x x) y))
1.703 * [regime-testing]: End program error score: 0.021377672209026127