13.721 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.011 * * * [progress]: [2/2] Setting up program.
0.013 * [progress]: [Phase 2 of 3] Improving.
0.013 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (+ x y) (+ y y))
0.014 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
0.015 * * [simplify]: iteration  1 :  8  enodes  (cost  7 )
0.016 * * [simplify]: iteration  2 :  11  enodes  (cost  7 )
0.017 * * [simplify]: iteration  3 :  13  enodes  (cost  7 )
0.019 * * [simplify]: iteration  done :  13  enodes  (cost  7 )
0.019 * [simplify]: Simplified to:
   (/ (+ x y) (+ y y))
0.019 * * [progress]: iteration 1 / 4
0.019 * * * [progress]: picking best candidate
0.020 * * * * [pick]: Picked  #<alt (λ (x y) (/ (+ x y) (+ y y)))>
0.020 * * * [progress]: localizing error
0.025 * * * [progress]: generating rewritten candidates
0.025 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.042 * * * [progress]: generating series expansions
0.042 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.042 * [approximate]: Taking taylor expansion of (* 1/2 (/ (+ x y) y)) in (x y) around 0
0.042 * [taylor]: Taking taylor expansion of (* 1/2 (/ (+ x y) y)) in y
0.042 * [taylor]: Taking taylor expansion of 1/2 in y
0.042 * [taylor]: Taking taylor expansion of (/ (+ x y) y) in y
0.042 * [taylor]: Taking taylor expansion of (+ x y) in y
0.042 * [taylor]: Taking taylor expansion of x in y
0.042 * [taylor]: Taking taylor expansion of y in y
0.042 * [taylor]: Taking taylor expansion of y in y
0.042 * [taylor]: Taking taylor expansion of (* 1/2 (/ (+ x y) y)) in x
0.042 * [taylor]: Taking taylor expansion of 1/2 in x
0.042 * [taylor]: Taking taylor expansion of (/ (+ x y) y) in x
0.042 * [taylor]: Taking taylor expansion of (+ x y) in x
0.043 * [taylor]: Taking taylor expansion of x in x
0.043 * [taylor]: Taking taylor expansion of y in x
0.043 * [taylor]: Taking taylor expansion of y in x
0.043 * [taylor]: Taking taylor expansion of (* 1/2 (/ (+ x y) y)) in x
0.043 * [taylor]: Taking taylor expansion of 1/2 in x
0.043 * [taylor]: Taking taylor expansion of (/ (+ x y) y) in x
0.043 * [taylor]: Taking taylor expansion of (+ x y) in x
0.043 * [taylor]: Taking taylor expansion of x in x
0.043 * [taylor]: Taking taylor expansion of y in x
0.043 * [taylor]: Taking taylor expansion of y in x
0.043 * [taylor]: Taking taylor expansion of 1/2 in y
0.044 * [taylor]: Taking taylor expansion of (* 1/2 (/ 1 y)) in y
0.044 * [taylor]: Taking taylor expansion of 1/2 in y
0.044 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.044 * [taylor]: Taking taylor expansion of y in y
0.046 * [taylor]: Taking taylor expansion of 0 in y
0.048 * [taylor]: Taking taylor expansion of 0 in y
0.051 * [taylor]: Taking taylor expansion of 0 in y
0.051 * [approximate]: Taking taylor expansion of (* 1/2 (* (+ (/ 1 y) (/ 1 x)) y)) in (x y) around 0
0.051 * [taylor]: Taking taylor expansion of (* 1/2 (* (+ (/ 1 y) (/ 1 x)) y)) in y
0.051 * [taylor]: Taking taylor expansion of 1/2 in y
0.051 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) y) in y
0.051 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in y
0.051 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.051 * [taylor]: Taking taylor expansion of y in y
0.052 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.052 * [taylor]: Taking taylor expansion of x in y
0.052 * [taylor]: Taking taylor expansion of y in y
0.052 * [taylor]: Taking taylor expansion of (* 1/2 (* (+ (/ 1 y) (/ 1 x)) y)) in x
0.052 * [taylor]: Taking taylor expansion of 1/2 in x
0.052 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) y) in x
0.052 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
0.052 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.052 * [taylor]: Taking taylor expansion of y in x
0.052 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.052 * [taylor]: Taking taylor expansion of x in x
0.052 * [taylor]: Taking taylor expansion of y in x
0.052 * [taylor]: Taking taylor expansion of (* 1/2 (* (+ (/ 1 y) (/ 1 x)) y)) in x
0.052 * [taylor]: Taking taylor expansion of 1/2 in x
0.052 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) y) in x
0.052 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
0.052 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.052 * [taylor]: Taking taylor expansion of y in x
0.052 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.052 * [taylor]: Taking taylor expansion of x in x
0.053 * [taylor]: Taking taylor expansion of y in x
0.053 * [taylor]: Taking taylor expansion of (* 1/2 y) in y
0.053 * [taylor]: Taking taylor expansion of 1/2 in y
0.053 * [taylor]: Taking taylor expansion of y in y
0.054 * [taylor]: Taking taylor expansion of 1/2 in y
0.056 * [taylor]: Taking taylor expansion of 0 in y
0.059 * [taylor]: Taking taylor expansion of 0 in y
0.062 * [taylor]: Taking taylor expansion of 0 in y
0.063 * [approximate]: Taking taylor expansion of (* 1/2 (* (+ (/ 1 y) (/ 1 x)) y)) in (x y) around 0
0.063 * [taylor]: Taking taylor expansion of (* 1/2 (* (+ (/ 1 y) (/ 1 x)) y)) in y
0.063 * [taylor]: Taking taylor expansion of 1/2 in y
0.063 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) y) in y
0.063 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in y
0.063 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.063 * [taylor]: Taking taylor expansion of y in y
0.063 * [taylor]: Taking taylor expansion of (/ 1 x) in y
0.063 * [taylor]: Taking taylor expansion of x in y
0.063 * [taylor]: Taking taylor expansion of y in y
0.063 * [taylor]: Taking taylor expansion of (* 1/2 (* (+ (/ 1 y) (/ 1 x)) y)) in x
0.063 * [taylor]: Taking taylor expansion of 1/2 in x
0.063 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) y) in x
0.063 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
0.063 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.063 * [taylor]: Taking taylor expansion of y in x
0.063 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.063 * [taylor]: Taking taylor expansion of x in x
0.064 * [taylor]: Taking taylor expansion of y in x
0.064 * [taylor]: Taking taylor expansion of (* 1/2 (* (+ (/ 1 y) (/ 1 x)) y)) in x
0.064 * [taylor]: Taking taylor expansion of 1/2 in x
0.064 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) y) in x
0.064 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
0.064 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.064 * [taylor]: Taking taylor expansion of y in x
0.064 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.064 * [taylor]: Taking taylor expansion of x in x
0.064 * [taylor]: Taking taylor expansion of y in x
0.065 * [taylor]: Taking taylor expansion of (* 1/2 y) in y
0.065 * [taylor]: Taking taylor expansion of 1/2 in y
0.065 * [taylor]: Taking taylor expansion of y in y
0.069 * [taylor]: Taking taylor expansion of 1/2 in y
0.072 * [taylor]: Taking taylor expansion of 0 in y
0.075 * [taylor]: Taking taylor expansion of 0 in y
0.078 * [taylor]: Taking taylor expansion of 0 in y
0.078 * * * [progress]: simplifying candidates
0.080 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (expm1 (/ (+ x y) (+ y y)))
  (log1p (/ (+ x y) (+ y y)))
  (- (log (+ x y)) (log (+ y y)))
  (log (/ (+ x y) (+ y y)))
  (exp (/ (+ x y) (+ y y)))
  (/ (* (* (+ x y) (+ x y)) (+ x y)) (* (* (+ y y) (+ y y)) (+ y y)))
  (* (cbrt (/ (+ x y) (+ y y))) (cbrt (/ (+ x y) (+ y y))))
  (cbrt (/ (+ x y) (+ y y)))
  (* (* (/ (+ x y) (+ y y)) (/ (+ x y) (+ y y))) (/ (+ x y) (+ y y)))
  (sqrt (/ (+ x y) (+ y y)))
  (sqrt (/ (+ x y) (+ y y)))
  (- (+ x y))
  (- (+ y y))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (cbrt (+ x y)) (cbrt (+ y y)))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (sqrt (+ y y)))
  (/ (cbrt (+ x y)) (sqrt (+ y y)))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) 1)
  (/ (cbrt (+ x y)) (+ y y))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (* (cbrt y) (cbrt y)))
  (/ (cbrt (+ x y)) (+ (cbrt y) (cbrt y)))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (sqrt y))
  (/ (cbrt (+ x y)) (+ (sqrt y) (sqrt y)))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) 1)
  (/ (cbrt (+ x y)) (+ y y))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (cbrt y))
  (/ (cbrt (+ x y)) (+ (* (cbrt y) (cbrt y)) (* (cbrt y) (cbrt y))))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (sqrt y))
  (/ (cbrt (+ x y)) (+ (sqrt y) (sqrt y)))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) y)
  (/ (cbrt (+ x y)) (+ 1 1))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (+ 1 1))
  (/ (cbrt (+ x y)) y)
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (+ 1 1))
  (/ (cbrt (+ x y)) y)
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) 2)
  (/ (cbrt (+ x y)) y)
  (/ (sqrt (+ x y)) (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (sqrt (+ x y)) (cbrt (+ y y)))
  (/ (sqrt (+ x y)) (sqrt (+ y y)))
  (/ (sqrt (+ x y)) (sqrt (+ y y)))
  (/ (sqrt (+ x y)) 1)
  (/ (sqrt (+ x y)) (+ y y))
  (/ (sqrt (+ x y)) (* (cbrt y) (cbrt y)))
  (/ (sqrt (+ x y)) (+ (cbrt y) (cbrt y)))
  (/ (sqrt (+ x y)) (sqrt y))
  (/ (sqrt (+ x y)) (+ (sqrt y) (sqrt y)))
  (/ (sqrt (+ x y)) 1)
  (/ (sqrt (+ x y)) (+ y y))
  (/ (sqrt (+ x y)) (cbrt y))
  (/ (sqrt (+ x y)) (+ (* (cbrt y) (cbrt y)) (* (cbrt y) (cbrt y))))
  (/ (sqrt (+ x y)) (sqrt y))
  (/ (sqrt (+ x y)) (+ (sqrt y) (sqrt y)))
  (/ (sqrt (+ x y)) y)
  (/ (sqrt (+ x y)) (+ 1 1))
  (/ (sqrt (+ x y)) (+ 1 1))
  (/ (sqrt (+ x y)) y)
  (/ (sqrt (+ x y)) (+ 1 1))
  (/ (sqrt (+ x y)) y)
  (/ (sqrt (+ x y)) 2)
  (/ (sqrt (+ x y)) y)
  (/ 1 (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (+ x y) (cbrt (+ y y)))
  (/ 1 (sqrt (+ y y)))
  (/ (+ x y) (sqrt (+ y y)))
  (/ 1 1)
  (/ (+ x y) (+ y y))
  (/ 1 (* (cbrt y) (cbrt y)))
  (/ (+ x y) (+ (cbrt y) (cbrt y)))
  (/ 1 (sqrt y))
  (/ (+ x y) (+ (sqrt y) (sqrt y)))
  (/ 1 1)
  (/ (+ x y) (+ y y))
  (/ 1 (cbrt y))
  (/ (+ x y) (+ (* (cbrt y) (cbrt y)) (* (cbrt y) (cbrt y))))
  (/ 1 (sqrt y))
  (/ (+ x y) (+ (sqrt y) (sqrt y)))
  (/ 1 y)
  (/ (+ x y) (+ 1 1))
  (/ 1 (+ 1 1))
  (/ (+ x y) y)
  (/ 1 (+ 1 1))
  (/ (+ x y) y)
  (/ 1 2)
  (/ (+ x y) y)
  (/ 1 (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (+ x y) (cbrt (+ y y)))
  (/ 1 (sqrt (+ y y)))
  (/ (+ x y) (sqrt (+ y y)))
  (/ 1 1)
  (/ (+ x y) (+ y y))
  (/ 1 (* (cbrt y) (cbrt y)))
  (/ (+ x y) (+ (cbrt y) (cbrt y)))
  (/ 1 (sqrt y))
  (/ (+ x y) (+ (sqrt y) (sqrt y)))
  (/ 1 1)
  (/ (+ x y) (+ y y))
  (/ 1 (cbrt y))
  (/ (+ x y) (+ (* (cbrt y) (cbrt y)) (* (cbrt y) (cbrt y))))
  (/ 1 (sqrt y))
  (/ (+ x y) (+ (sqrt y) (sqrt y)))
  (/ 1 y)
  (/ (+ x y) (+ 1 1))
  (/ 1 (+ 1 1))
  (/ (+ x y) y)
  (/ 1 (+ 1 1))
  (/ (+ x y) y)
  (/ 1 2)
  (/ (+ x y) y)
  (/ 1 (+ y y))
  (/ (+ y y) (+ x y))
  (/ (+ x y) (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (+ x y) (sqrt (+ y y)))
  (/ (+ x y) 1)
  (/ (+ x y) (* (cbrt y) (cbrt y)))
  (/ (+ x y) (sqrt y))
  (/ (+ x y) 1)
  (/ (+ x y) (cbrt y))
  (/ (+ x y) (sqrt y))
  (/ (+ x y) y)
  (/ (+ x y) (+ 1 1))
  (/ (+ x y) (+ 1 1))
  (/ (+ x y) 2)
  (/ (+ y y) (cbrt (+ x y)))
  (/ (+ y y) (sqrt (+ x y)))
  (/ (+ y y) (+ x y))
  (/ (+ y y) (+ x y))
  (/ (+ x y) (+ (pow y 3) (pow y 3)))
  (/ (+ x y) (- (* y y) (* y y)))
  (* (+ y y) (+ (* x x) (- (* y y) (* x y))))
  (* (+ y y) (- x y))
  (+ (* 1/2 (/ x y)) 1/2)
  (+ (* 1/2 (/ x y)) 1/2)
  (+ (* 1/2 (/ x y)) 1/2)
0.083 * * [simplify]: iteration  0 :  114  enodes  (cost  1089 )
0.105 * * [simplify]: iteration  1 :  233  enodes  (cost  986 )
0.155 * * [simplify]: iteration  2 :  574  enodes  (cost  955 )
0.522 * * [simplify]: iteration  3 :  1667  enodes  (cost  955 )
2.085 * * [simplify]: iteration  done :  5000  enodes  (cost  955 )
2.086 * [simplify]: Simplified to:
   (expm1 (/ (+ x y) (+ y y)))
  (log1p (/ (+ x y) (+ y y)))
  (log (/ (+ x y) (+ y y)))
  (log (/ (+ x y) (+ y y)))
  (exp (/ (+ x y) (+ y y)))
  (pow (/ (+ x y) (+ y y)) 3)
  (* (cbrt (/ (+ x y) (+ y y))) (cbrt (/ (+ x y) (+ y y))))
  (cbrt (/ (+ x y) (+ y y)))
  (pow (/ (+ x y) (+ y y)) 3)
  (sqrt (/ (+ x y) (+ y y)))
  (sqrt (/ (+ x y) (+ y y)))
  (- (+ x y))
  (* -2 y)
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (cbrt (+ x y)) (cbrt (+ y y)))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (sqrt (+ y y)))
  (/ (cbrt (+ x y)) (sqrt (+ y y)))
  (* (cbrt (+ x y)) (cbrt (+ x y)))
  (/ (cbrt (+ x y)) (+ y y))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (* (cbrt y) (cbrt y)))
  (/ (cbrt (+ x y)) (* 2 (cbrt y)))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (sqrt y))
  (/ (cbrt (+ x y)) (* 2 (sqrt y)))
  (* (cbrt (+ x y)) (cbrt (+ x y)))
  (/ (cbrt (+ x y)) (+ y y))
  (* (cbrt (+ x y)) (/ (cbrt (+ x y)) (cbrt y)))
  (/ (cbrt (+ x y)) (* 2 (* (cbrt y) (cbrt y))))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) (sqrt y))
  (/ (cbrt (+ x y)) (* 2 (sqrt y)))
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) y)
  (/ (cbrt (+ x y)) 2)
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) 2)
  (/ (cbrt (+ x y)) y)
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) 2)
  (/ (cbrt (+ x y)) y)
  (/ (* (cbrt (+ x y)) (cbrt (+ x y))) 2)
  (/ (cbrt (+ x y)) y)
  (/ (sqrt (+ x y)) (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (sqrt (+ x y)) (cbrt (+ y y)))
  (/ (sqrt (+ x y)) (sqrt (+ y y)))
  (/ (sqrt (+ x y)) (sqrt (+ y y)))
  (sqrt (+ x y))
  (/ (sqrt (+ x y)) (+ y y))
  (/ (sqrt (+ x y)) (* (cbrt y) (cbrt y)))
  (/ (sqrt (+ x y)) (* 2 (cbrt y)))
  (/ (sqrt (+ x y)) (sqrt y))
  (/ (sqrt (+ x y)) (* 2 (sqrt y)))
  (sqrt (+ x y))
  (/ (sqrt (+ x y)) (+ y y))
  (/ (sqrt (+ x y)) (cbrt y))
  (/ (sqrt (+ x y)) (* 2 (* (cbrt y) (cbrt y))))
  (/ (sqrt (+ x y)) (sqrt y))
  (/ (sqrt (+ x y)) (* 2 (sqrt y)))
  (/ (sqrt (+ x y)) y)
  (/ (sqrt (+ x y)) 2)
  (/ (sqrt (+ x y)) 2)
  (/ (sqrt (+ x y)) y)
  (/ (sqrt (+ x y)) 2)
  (/ (sqrt (+ x y)) y)
  (/ (sqrt (+ x y)) 2)
  (/ (sqrt (+ x y)) y)
  (/ 1 (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (+ x y) (cbrt (+ y y)))
  (/ 1 (sqrt (+ y y)))
  (/ (+ x y) (sqrt (+ y y)))
  1
  (/ (+ x y) (+ y y))
  (/ 1 (* (cbrt y) (cbrt y)))
  (/ (+ x y) (* 2 (cbrt y)))
  (/ 1 (sqrt y))
  (/ (+ x y) (* 2 (sqrt y)))
  1
  (/ (+ x y) (+ y y))
  (/ 1 (cbrt y))
  (/ (+ x y) (* 2 (* (cbrt y) (cbrt y))))
  (/ 1 (sqrt y))
  (/ (+ x y) (* 2 (sqrt y)))
  (/ 1 y)
  (/ (+ x y) 2)
  1/2
  (/ (+ x y) y)
  1/2
  (/ (+ x y) y)
  1/2
  (/ (+ x y) y)
  (/ 1 (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (+ x y) (cbrt (+ y y)))
  (/ 1 (sqrt (+ y y)))
  (/ (+ x y) (sqrt (+ y y)))
  1
  (/ (+ x y) (+ y y))
  (/ 1 (* (cbrt y) (cbrt y)))
  (/ (+ x y) (* 2 (cbrt y)))
  (/ 1 (sqrt y))
  (/ (+ x y) (* 2 (sqrt y)))
  1
  (/ (+ x y) (+ y y))
  (/ 1 (cbrt y))
  (/ (+ x y) (* 2 (* (cbrt y) (cbrt y))))
  (/ 1 (sqrt y))
  (/ (+ x y) (* 2 (sqrt y)))
  (/ 1 y)
  (/ (+ x y) 2)
  1/2
  (/ (+ x y) y)
  1/2
  (/ (+ x y) y)
  1/2
  (/ (+ x y) y)
  (/ 1/2 y)
  (* (/ 2 (+ x y)) y)
  (/ (+ x y) (* (cbrt (+ y y)) (cbrt (+ y y))))
  (/ (+ x y) (sqrt (+ y y)))
  (+ x y)
  (/ (+ x y) (* (cbrt y) (cbrt y)))
  (/ (+ x y) (sqrt y))
  (+ x y)
  (/ (+ x y) (cbrt y))
  (/ (+ x y) (sqrt y))
  (/ (+ x y) y)
  (/ (+ x y) 2)
  (/ (+ x y) 2)
  (/ (+ x y) 2)
  (/ (+ y y) (cbrt (+ x y)))
  (/ (+ y y) (sqrt (+ x y)))
  (* (/ 2 (+ x y)) y)
  (* (/ 2 (+ x y)) y)
  (/ (+ x y) (* 2 (pow y 3)))
  (/ (+ x y) 0)
  (* (+ y y) (fma x x (* y (- y x))))
  (* (+ y y) (- x y))
  (fma 1/2 (/ x y) 1/2)
  (fma 1/2 (/ x y) 1/2)
  (fma 1/2 (/ x y) 1/2)
2.087 * * * [progress]: adding candidates to table
2.213 * * [progress]: iteration 2 / 4
2.213 * * * [progress]: picking best candidate
2.214 * * * * [pick]: Picked  #<alt (λ (x y) (fma 1/2 (/ x y) 1/2))>
2.214 * * * [progress]: localizing error
2.219 * * * [progress]: generating rewritten candidates
2.219 * * * [progress]: generating series expansions
2.219 * * * [progress]: simplifying candidates
2.219 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   
2.220 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
2.220 * * [simplify]: iteration  done :  0  enodes  (cost  0 )
2.220 * [simplify]: Simplified to:
   
2.220 * * * [progress]: adding candidates to table
2.220 * [progress]: [Phase 3 of 3] Extracting.
2.222 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (fma 1/2 (/ x y) 1/2)
2.222 * * [simplify]: iteration  0 :  5  enodes  (cost  6 )
2.223 * * [simplify]: iteration  done :  5  enodes  (cost  6 )
2.223 * [simplify]: Simplified to:
   (fma 1/2 (/ x y) 1/2)
2.606 * [regime-testing]: End program error score: 0.02674170403745575
2.623 * [regime-testing]: Target error score: 0.02674170403745575