8.133 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.012 * * * [progress]: [2/2] Setting up program.
0.014 * [progress]: [Phase 2 of 3] Improving.
0.014 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (- x y) (* (* x 2.0) y))
0.015 * * [simplify]: iteration  0 :  7  enodes  (cost  9 )
0.016 * * [simplify]: iteration  1 :  18  enodes  (cost  9 )
0.019 * * [simplify]: iteration  2 :  47  enodes  (cost  9 )
0.026 * * [simplify]: iteration  3 :  102  enodes  (cost  9 )
0.042 * * [simplify]: iteration  4 :  159  enodes  (cost  9 )
0.062 * * [simplify]: iteration  5 :  182  enodes  (cost  9 )
0.084 * * [simplify]: iteration  6 :  190  enodes  (cost  9 )
0.106 * * [simplify]: iteration  done :  190  enodes  (cost  9 )
0.106 * [simplify]: Simplified to:
   (/ (- x y) (* (* x 2.0) y))
0.106 * * [progress]: iteration 1 / 4
0.106 * * * [progress]: picking best candidate
0.107 * * * * [pick]: Picked  #<alt (λ (x y) (/ (- x y) (* (* x 2.0) y)))>
0.107 * * * [progress]: localizing error
0.113 * * * [progress]: generating rewritten candidates
0.113 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.129 * * * [progress]: generating series expansions
0.129 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.129 * [approximate]: Taking taylor expansion of (* 0.5 (/ (- x y) (* x y))) in (x y) around 0
0.129 * [taylor]: Taking taylor expansion of (* 0.5 (/ (- x y) (* x y))) in y
0.129 * [taylor]: Taking taylor expansion of 0.5 in y
0.129 * [taylor]: Taking taylor expansion of (/ (- x y) (* x y)) in y
0.129 * [taylor]: Taking taylor expansion of (- x y) in y
0.129 * [taylor]: Taking taylor expansion of x in y
0.129 * [taylor]: Taking taylor expansion of y in y
0.129 * [taylor]: Taking taylor expansion of (* x y) in y
0.129 * [taylor]: Taking taylor expansion of x in y
0.129 * [taylor]: Taking taylor expansion of y in y
0.130 * [taylor]: Taking taylor expansion of (* 0.5 (/ (- x y) (* x y))) in x
0.130 * [taylor]: Taking taylor expansion of 0.5 in x
0.130 * [taylor]: Taking taylor expansion of (/ (- x y) (* x y)) in x
0.130 * [taylor]: Taking taylor expansion of (- x y) in x
0.130 * [taylor]: Taking taylor expansion of x in x
0.130 * [taylor]: Taking taylor expansion of y in x
0.130 * [taylor]: Taking taylor expansion of (* x y) in x
0.130 * [taylor]: Taking taylor expansion of x in x
0.130 * [taylor]: Taking taylor expansion of y in x
0.130 * [taylor]: Taking taylor expansion of (* 0.5 (/ (- x y) (* x y))) in x
0.130 * [taylor]: Taking taylor expansion of 0.5 in x
0.130 * [taylor]: Taking taylor expansion of (/ (- x y) (* x y)) in x
0.130 * [taylor]: Taking taylor expansion of (- x y) in x
0.130 * [taylor]: Taking taylor expansion of x in x
0.130 * [taylor]: Taking taylor expansion of y in x
0.130 * [taylor]: Taking taylor expansion of (* x y) in x
0.130 * [taylor]: Taking taylor expansion of x in x
0.130 * [taylor]: Taking taylor expansion of y in x
0.131 * [taylor]: Taking taylor expansion of -0.5 in y
0.132 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 y)) in y
0.132 * [taylor]: Taking taylor expansion of 0.5 in y
0.132 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.132 * [taylor]: Taking taylor expansion of y in y
0.135 * [taylor]: Taking taylor expansion of 0 in y
0.138 * [taylor]: Taking taylor expansion of 0 in y
0.141 * [taylor]: Taking taylor expansion of 0 in y
0.142 * [approximate]: Taking taylor expansion of (* 0.5 (* (- (/ 1 x) (/ 1 y)) (* x y))) in (x y) around 0
0.142 * [taylor]: Taking taylor expansion of (* 0.5 (* (- (/ 1 x) (/ 1 y)) (* x y))) in y
0.142 * [taylor]: Taking taylor expansion of 0.5 in y
0.142 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (* x y)) in y
0.142 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in y
0.142 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.142 * [taylor]: Taking taylor expansion of x in y
0.142 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.142 * [taylor]: Taking taylor expansion of y in y
0.142 * [taylor]: Taking taylor expansion of (* x y) in y
0.142 * [taylor]: Taking taylor expansion of x in y
0.142 * [taylor]: Taking taylor expansion of y in y
0.142 * [taylor]: Taking taylor expansion of (* 0.5 (* (- (/ 1 x) (/ 1 y)) (* x y))) in x
0.142 * [taylor]: Taking taylor expansion of 0.5 in x
0.142 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (* x y)) in x
0.142 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
0.142 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.142 * [taylor]: Taking taylor expansion of x in x
0.143 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.143 * [taylor]: Taking taylor expansion of y in x
0.143 * [taylor]: Taking taylor expansion of (* x y) in x
0.143 * [taylor]: Taking taylor expansion of x in x
0.143 * [taylor]: Taking taylor expansion of y in x
0.143 * [taylor]: Taking taylor expansion of (* 0.5 (* (- (/ 1 x) (/ 1 y)) (* x y))) in x
0.143 * [taylor]: Taking taylor expansion of 0.5 in x
0.143 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (* x y)) in x
0.143 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
0.143 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.143 * [taylor]: Taking taylor expansion of x in x
0.143 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.143 * [taylor]: Taking taylor expansion of y in x
0.143 * [taylor]: Taking taylor expansion of (* x y) in x
0.143 * [taylor]: Taking taylor expansion of x in x
0.143 * [taylor]: Taking taylor expansion of y in x
0.144 * [taylor]: Taking taylor expansion of 0 in y
0.145 * [taylor]: Taking taylor expansion of (* 0.5 y) in y
0.145 * [taylor]: Taking taylor expansion of 0.5 in y
0.145 * [taylor]: Taking taylor expansion of y in y
0.151 * [taylor]: Taking taylor expansion of (- 0.5) in y
0.151 * [taylor]: Taking taylor expansion of 0.5 in y
0.154 * [taylor]: Taking taylor expansion of 0 in y
0.159 * [taylor]: Taking taylor expansion of 0 in y
0.165 * [taylor]: Taking taylor expansion of 0 in y
0.165 * [approximate]: Taking taylor expansion of (* 0.5 (* x (* y (- (/ 1 y) (/ 1 x))))) in (x y) around 0
0.165 * [taylor]: Taking taylor expansion of (* 0.5 (* x (* y (- (/ 1 y) (/ 1 x))))) in y
0.165 * [taylor]: Taking taylor expansion of 0.5 in y
0.165 * [taylor]: Taking taylor expansion of (* x (* y (- (/ 1 y) (/ 1 x)))) in y
0.165 * [taylor]: Taking taylor expansion of x in y
0.165 * [taylor]: Taking taylor expansion of (* y (- (/ 1 y) (/ 1 x))) in y
0.165 * [taylor]: Taking taylor expansion of y in y
0.165 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in y
0.165 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.165 * [taylor]: Taking taylor expansion of y in y
0.166 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.166 * [taylor]: Taking taylor expansion of x in y
0.166 * [taylor]: Taking taylor expansion of (* 0.5 (* x (* y (- (/ 1 y) (/ 1 x))))) in x
0.166 * [taylor]: Taking taylor expansion of 0.5 in x
0.166 * [taylor]: Taking taylor expansion of (* x (* y (- (/ 1 y) (/ 1 x)))) in x
0.166 * [taylor]: Taking taylor expansion of x in x
0.166 * [taylor]: Taking taylor expansion of (* y (- (/ 1 y) (/ 1 x))) in x
0.166 * [taylor]: Taking taylor expansion of y in x
0.166 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
0.166 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.166 * [taylor]: Taking taylor expansion of y in x
0.166 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.166 * [taylor]: Taking taylor expansion of x in x
0.166 * [taylor]: Taking taylor expansion of (* 0.5 (* x (* y (- (/ 1 y) (/ 1 x))))) in x
0.166 * [taylor]: Taking taylor expansion of 0.5 in x
0.166 * [taylor]: Taking taylor expansion of (* x (* y (- (/ 1 y) (/ 1 x)))) in x
0.166 * [taylor]: Taking taylor expansion of x in x
0.166 * [taylor]: Taking taylor expansion of (* y (- (/ 1 y) (/ 1 x))) in x
0.166 * [taylor]: Taking taylor expansion of y in x
0.166 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
0.166 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.166 * [taylor]: Taking taylor expansion of y in x
0.167 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.167 * [taylor]: Taking taylor expansion of x in x
0.168 * [taylor]: Taking taylor expansion of 0 in y
0.169 * [taylor]: Taking taylor expansion of (- (* 0.5 y)) in y
0.169 * [taylor]: Taking taylor expansion of (* 0.5 y) in y
0.169 * [taylor]: Taking taylor expansion of 0.5 in y
0.169 * [taylor]: Taking taylor expansion of y in y
0.171 * [taylor]: Taking taylor expansion of 0.5 in y
0.175 * [taylor]: Taking taylor expansion of 0 in y
0.180 * [taylor]: Taking taylor expansion of 0 in y
0.185 * [taylor]: Taking taylor expansion of 0 in y
0.186 * * * [progress]: simplifying candidates
0.186 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (expm1 (/ (- x y) (* (* x 2.0) y)))
  (log1p (/ (- x y) (* (* x 2.0) y)))
  (- (log (- x y)) (+ (+ (log x) (log 2.0)) (log y)))
  (- (log (- x y)) (+ (log (* x 2.0)) (log y)))
  (- (log (- x y)) (log (* (* x 2.0) y)))
  (log (/ (- x y) (* (* x 2.0) y)))
  (exp (/ (- x y) (* (* x 2.0) y)))
  (/ (* (* (- x y) (- x y)) (- x y)) (* (* (* (* x x) x) (* (* 2.0 2.0) 2.0)) (* (* y y) y)))
  (/ (* (* (- x y) (- x y)) (- x y)) (* (* (* (* x 2.0) (* x 2.0)) (* x 2.0)) (* (* y y) y)))
  (/ (* (* (- x y) (- x y)) (- x y)) (* (* (* (* x 2.0) y) (* (* x 2.0) y)) (* (* x 2.0) y)))
  (* (cbrt (/ (- x y) (* (* x 2.0) y))) (cbrt (/ (- x y) (* (* x 2.0) y))))
  (cbrt (/ (- x y) (* (* x 2.0) y)))
  (* (* (/ (- x y) (* (* x 2.0) y)) (/ (- x y) (* (* x 2.0) y))) (/ (- x y) (* (* x 2.0) y)))
  (sqrt (/ (- x y) (* (* x 2.0) y)))
  (sqrt (/ (- x y) (* (* x 2.0) y)))
  (- (- x y))
  (- (* (* x 2.0) y))
  (/ x (* (* x 2.0) y))
  (/ y (* (* x 2.0) y))
  (/ (* (cbrt (- x y)) (cbrt (- x y))) (* x 2.0))
  (/ (cbrt (- x y)) y)
  (/ (sqrt (- x y)) (* x 2.0))
  (/ (sqrt (- x y)) y)
  (/ 1 (* x 2.0))
  (/ (- x y) y)
  (/ (+ (sqrt x) (sqrt y)) (* x 2.0))
  (/ (- (sqrt x) (sqrt y)) y)
  (/ 1 (* x 2.0))
  (/ (- x y) y)
  (/ 1 (* (* x 2.0) y))
  (/ (* (* x 2.0) y) (- x y))
  (/ (- x y) (* x 2.0))
  (/ (* (* x 2.0) y) (cbrt (- x y)))
  (/ (* (* x 2.0) y) (sqrt (- x y)))
  (/ (* (* x 2.0) y) (- x y))
  (/ (* (* x 2.0) y) (- (sqrt x) (sqrt y)))
  (/ (* (* x 2.0) y) (- x y))
  (* (* (* x 2.0) y) (+ (* x x) (+ (* y y) (* x y))))
  (* (* (* x 2.0) y) (+ x y))
  (- (* 0.5 (/ 1 y)) (* 0.5 (/ 1 x)))
  (- (* 0.5 (/ 1 y)) (* 0.5 (/ 1 x)))
  (- (* 0.5 (/ 1 y)) (* 0.5 (/ 1 x)))
0.189 * * [simplify]: iteration  0 :  84  enodes  (cost  467 )
0.203 * * [simplify]: iteration  1 :  241  enodes  (cost  452 )
0.253 * * [simplify]: iteration  2 :  932  enodes  (cost  372 )
0.557 * * [simplify]: iteration  done :  5000  enodes  (cost  370 )
0.557 * [simplify]: Simplified to:
   (expm1 (/ (- x y) (* (* x 2.0) y)))
  (log1p (/ (- x y) (* (* x 2.0) y)))
  (log (/ (- x y) (* (* x 2.0) y)))
  (log (/ (- x y) (* (* x 2.0) y)))
  (log (/ (- x y) (* (* x 2.0) y)))
  (log (/ (- x y) (* (* x 2.0) y)))
  (exp (/ (- x y) (* (* x 2.0) y)))
  (pow (/ (- x y) (* (* x 2.0) y)) 3)
  (pow (/ (- x y) (* (* x 2.0) y)) 3)
  (pow (/ (- x y) (* (* x 2.0) y)) 3)
  (* (cbrt (/ (- x y) (* (* x 2.0) y))) (cbrt (/ (- x y) (* (* x 2.0) y))))
  (cbrt (/ (- x y) (* (* x 2.0) y)))
  (pow (/ (- x y) (* (* x 2.0) y)) 3)
  (sqrt (/ (- x y) (* (* x 2.0) y)))
  (sqrt (/ (- x y) (* (* x 2.0) y)))
  (- (- x y))
  (- (* (* x 2.0) y))
  (/ (/ 1 2.0) y)
  (/ 1 (* x 2.0))
  (/ (* (cbrt (- x y)) (cbrt (- x y))) (* x 2.0))
  (/ (cbrt (- x y)) y)
  (/ (sqrt (- x y)) (* x 2.0))
  (/ (sqrt (- x y)) y)
  (/ 1 (* x 2.0))
  (/ (- x y) y)
  (/ (+ (sqrt x) (sqrt y)) (* x 2.0))
  (/ (- (sqrt x) (sqrt y)) y)
  (/ 1 (* x 2.0))
  (/ (- x y) y)
  (/ 1 (* (* x 2.0) y))
  (/ (* (* x 2.0) y) (- x y))
  (/ (- x y) (* x 2.0))
  (/ (* (* x 2.0) y) (cbrt (- x y)))
  (/ (* (* x 2.0) y) (sqrt (- x y)))
  (/ (* (* x 2.0) y) (- x y))
  (/ (* (* x 2.0) y) (- (sqrt x) (sqrt y)))
  (/ (* (* x 2.0) y) (- x y))
  (* (* (* x 2.0) y) (fma x x (* y (+ x y))))
  (* (* (* x 2.0) y) (+ x y))
  (- (/ 0.5 y) (/ 0.5 x))
  (- (/ 0.5 y) (/ 0.5 x))
  (- (/ 0.5 y) (/ 0.5 x))
0.557 * * * [progress]: adding candidates to table
0.615 * * [progress]: iteration 2 / 4
0.615 * * * [progress]: picking best candidate
0.616 * * * * [pick]: Picked  #<alt (λ (x y) (- (/ 0.5 y) (/ 0.5 x)))>
0.616 * * * [progress]: localizing error
0.624 * * * [progress]: generating rewritten candidates
0.624 * * * [progress]: generating series expansions
0.624 * * * [progress]: simplifying candidates
0.624 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   
0.625 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
0.625 * * [simplify]: iteration  done :  0  enodes  (cost  0 )
0.625 * [simplify]: Simplified to:
   
0.625 * * * [progress]: adding candidates to table
0.625 * [progress]: [Phase 3 of 3] Extracting.
0.627 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (/ 0.5 y) (/ 0.5 x))
0.627 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
0.627 * * [simplify]: iteration  done :  6  enodes  (cost  7 )
0.627 * [simplify]: Simplified to:
   (- (/ 0.5 y) (/ 0.5 x))
0.987 * [regime-testing]: End program error score: 0.012574692149108785
1.005 * [regime-testing]: Target error score: 0.012574692149108785