20.664 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.024 * * * [progress]: [2/2] Setting up program.
0.027 * [progress]: [Phase 2 of 3] Improving.
0.027 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (* 4.0 (- (- x y) (* z 0.5))) z)
0.027 * * [simplify]: iteration  0 :  10  enodes  (cost  11 )
0.029 * * [simplify]: iteration  1 :  20  enodes  (cost  11 )
0.031 * * [simplify]: iteration  2 :  47  enodes  (cost  11 )
0.038 * * [simplify]: iteration  3 :  129  enodes  (cost  11 )
0.067 * * [simplify]: iteration  4 :  270  enodes  (cost  11 )
0.146 * * [simplify]: iteration  5 :  501  enodes  (cost  11 )
0.287 * * [simplify]: iteration  6 :  764  enodes  (cost  11 )
0.689 * * [simplify]: iteration  7 :  1120  enodes  (cost  9 )
2.297 * * [simplify]: iteration  8 :  2853  enodes  (cost  9 )
4.618 * * [simplify]: iteration  done :  5000  enodes  (cost  9 )
4.618 * [simplify]: Simplified to:
   (* 4.0 (- (/ (- x y) z) 0.5))
4.622 * * [progress]: iteration 1 / 4
4.622 * * * [progress]: picking best candidate
4.625 * * * * [pick]: Picked  #<alt (λ (x y z) (* 4.0 (- (/ (- x y) z) 0.5)))>
4.625 * * * [progress]: localizing error
4.636 * * * [progress]: generating rewritten candidates
4.636 * * * * [progress]: [ 1 / 1 ] rewriting at (2 2 1)
4.644 * * * [progress]: generating series expansions
4.644 * * * * [progress]: [ 1 / 1 ] generating series at (2 2 1)
4.644 * [approximate]: Taking taylor expansion of (/ (- x y) z) in (x y z) around 0
4.644 * [taylor]: Taking taylor expansion of (/ (- x y) z) in z
4.644 * [taylor]: Taking taylor expansion of (- x y) in z
4.644 * [taylor]: Taking taylor expansion of x in z
4.644 * [taylor]: Taking taylor expansion of y in z
4.644 * [taylor]: Taking taylor expansion of z in z
4.644 * [taylor]: Taking taylor expansion of (/ (- x y) z) in y
4.644 * [taylor]: Taking taylor expansion of (- x y) in y
4.644 * [taylor]: Taking taylor expansion of x in y
4.644 * [taylor]: Taking taylor expansion of y in y
4.644 * [taylor]: Taking taylor expansion of z in y
4.644 * [taylor]: Taking taylor expansion of (/ (- x y) z) in x
4.644 * [taylor]: Taking taylor expansion of (- x y) in x
4.644 * [taylor]: Taking taylor expansion of x in x
4.644 * [taylor]: Taking taylor expansion of y in x
4.644 * [taylor]: Taking taylor expansion of z in x
4.644 * [taylor]: Taking taylor expansion of (/ (- x y) z) in x
4.644 * [taylor]: Taking taylor expansion of (- x y) in x
4.644 * [taylor]: Taking taylor expansion of x in x
4.644 * [taylor]: Taking taylor expansion of y in x
4.644 * [taylor]: Taking taylor expansion of z in x
4.645 * [taylor]: Taking taylor expansion of (* -1 (/ y z)) in y
4.645 * [taylor]: Taking taylor expansion of -1 in y
4.645 * [taylor]: Taking taylor expansion of (/ y z) in y
4.645 * [taylor]: Taking taylor expansion of y in y
4.645 * [taylor]: Taking taylor expansion of z in y
4.645 * [taylor]: Taking taylor expansion of (/ 1 z) in y
4.645 * [taylor]: Taking taylor expansion of z in y
4.645 * [taylor]: Taking taylor expansion of (/ 1 z) in z
4.645 * [taylor]: Taking taylor expansion of z in z
4.645 * [taylor]: Taking taylor expansion of (/ -1 z) in z
4.645 * [taylor]: Taking taylor expansion of -1 in z
4.645 * [taylor]: Taking taylor expansion of z in z
4.645 * [taylor]: Taking taylor expansion of 0 in y
4.645 * [taylor]: Taking taylor expansion of 0 in z
4.645 * [taylor]: Taking taylor expansion of 0 in z
4.645 * [taylor]: Taking taylor expansion of 0 in z
4.646 * [taylor]: Taking taylor expansion of 0 in y
4.646 * [taylor]: Taking taylor expansion of 0 in z
4.646 * [taylor]: Taking taylor expansion of 0 in z
4.646 * [taylor]: Taking taylor expansion of 0 in z
4.646 * [taylor]: Taking taylor expansion of 0 in z
4.646 * [approximate]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in (x y z) around 0
4.646 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in z
4.646 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in z
4.646 * [taylor]: Taking taylor expansion of (/ 1 x) in z
4.646 * [taylor]: Taking taylor expansion of x in z
4.646 * [taylor]: Taking taylor expansion of (/ 1 y) in z
4.646 * [taylor]: Taking taylor expansion of y in z
4.646 * [taylor]: Taking taylor expansion of z in z
4.646 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in y
4.646 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in y
4.646 * [taylor]: Taking taylor expansion of (/ 1 x) in y
4.646 * [taylor]: Taking taylor expansion of x in y
4.646 * [taylor]: Taking taylor expansion of (/ 1 y) in y
4.646 * [taylor]: Taking taylor expansion of y in y
4.646 * [taylor]: Taking taylor expansion of z in y
4.646 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in x
4.646 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
4.646 * [taylor]: Taking taylor expansion of (/ 1 x) in x
4.646 * [taylor]: Taking taylor expansion of x in x
4.647 * [taylor]: Taking taylor expansion of (/ 1 y) in x
4.647 * [taylor]: Taking taylor expansion of y in x
4.647 * [taylor]: Taking taylor expansion of z in x
4.647 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in x
4.647 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
4.647 * [taylor]: Taking taylor expansion of (/ 1 x) in x
4.647 * [taylor]: Taking taylor expansion of x in x
4.647 * [taylor]: Taking taylor expansion of (/ 1 y) in x
4.647 * [taylor]: Taking taylor expansion of y in x
4.647 * [taylor]: Taking taylor expansion of z in x
4.647 * [taylor]: Taking taylor expansion of z in y
4.647 * [taylor]: Taking taylor expansion of (neg (/ z y)) in y
4.647 * [taylor]: Taking taylor expansion of (/ z y) in y
4.647 * [taylor]: Taking taylor expansion of z in y
4.647 * [taylor]: Taking taylor expansion of y in y
4.647 * [taylor]: Taking taylor expansion of (neg z) in z
4.647 * [taylor]: Taking taylor expansion of z in z
4.647 * [taylor]: Taking taylor expansion of z in z
4.647 * [taylor]: Taking taylor expansion of 0 in y
4.647 * [taylor]: Taking taylor expansion of 0 in z
4.647 * [taylor]: Taking taylor expansion of 0 in z
4.648 * [taylor]: Taking taylor expansion of 0 in y
4.648 * [taylor]: Taking taylor expansion of 0 in z
4.648 * [taylor]: Taking taylor expansion of 0 in z
4.648 * [taylor]: Taking taylor expansion of 0 in z
4.648 * [approximate]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in (x y z) around 0
4.648 * [taylor]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in z
4.648 * [taylor]: Taking taylor expansion of -1 in z
4.648 * [taylor]: Taking taylor expansion of (* (- (/ 1 y) (/ 1 x)) z) in z
4.648 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in z
4.648 * [taylor]: Taking taylor expansion of (/ 1 y) in z
4.648 * [taylor]: Taking taylor expansion of y in z
4.649 * [taylor]: Taking taylor expansion of (/ 1 x) in z
4.649 * [taylor]: Taking taylor expansion of x in z
4.649 * [taylor]: Taking taylor expansion of z in z
4.649 * [taylor]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in y
4.649 * [taylor]: Taking taylor expansion of -1 in y
4.649 * [taylor]: Taking taylor expansion of (* (- (/ 1 y) (/ 1 x)) z) in y
4.649 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in y
4.649 * [taylor]: Taking taylor expansion of (/ 1 y) in y
4.649 * [taylor]: Taking taylor expansion of y in y
4.649 * [taylor]: Taking taylor expansion of (/ 1 x) in y
4.649 * [taylor]: Taking taylor expansion of x in y
4.649 * [taylor]: Taking taylor expansion of z in y
4.649 * [taylor]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in x
4.649 * [taylor]: Taking taylor expansion of -1 in x
4.649 * [taylor]: Taking taylor expansion of (* (- (/ 1 y) (/ 1 x)) z) in x
4.649 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
4.649 * [taylor]: Taking taylor expansion of (/ 1 y) in x
4.649 * [taylor]: Taking taylor expansion of y in x
4.649 * [taylor]: Taking taylor expansion of (/ 1 x) in x
4.649 * [taylor]: Taking taylor expansion of x in x
4.649 * [taylor]: Taking taylor expansion of z in x
4.649 * [taylor]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in x
4.649 * [taylor]: Taking taylor expansion of -1 in x
4.649 * [taylor]: Taking taylor expansion of (* (- (/ 1 y) (/ 1 x)) z) in x
4.649 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
4.649 * [taylor]: Taking taylor expansion of (/ 1 y) in x
4.649 * [taylor]: Taking taylor expansion of y in x
4.649 * [taylor]: Taking taylor expansion of (/ 1 x) in x
4.649 * [taylor]: Taking taylor expansion of x in x
4.649 * [taylor]: Taking taylor expansion of z in x
4.649 * [taylor]: Taking taylor expansion of z in y
4.650 * [taylor]: Taking taylor expansion of (neg (/ z y)) in y
4.650 * [taylor]: Taking taylor expansion of (/ z y) in y
4.650 * [taylor]: Taking taylor expansion of z in y
4.650 * [taylor]: Taking taylor expansion of y in y
4.650 * [taylor]: Taking taylor expansion of (neg z) in z
4.650 * [taylor]: Taking taylor expansion of z in z
4.650 * [taylor]: Taking taylor expansion of z in z
4.650 * [taylor]: Taking taylor expansion of 0 in y
4.650 * [taylor]: Taking taylor expansion of 0 in z
4.650 * [taylor]: Taking taylor expansion of 0 in z
4.650 * [taylor]: Taking taylor expansion of 0 in y
4.650 * [taylor]: Taking taylor expansion of 0 in z
4.650 * [taylor]: Taking taylor expansion of 0 in z
4.651 * [taylor]: Taking taylor expansion of 0 in z
4.651 * * * [progress]: simplifying candidates
4.651 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (log (- x y)) (log z))
  (log (/ (- x y) z))
  (exp (/ (- x y) z))
  (/ (* (* (- x y) (- x y)) (- x y)) (* (* z z) z))
  (* (cbrt (/ (- x y) z)) (cbrt (/ (- x y) z)))
  (cbrt (/ (- x y) z))
  (* (* (/ (- x y) z) (/ (- x y) z)) (/ (- x y) z))
  (sqrt (/ (- x y) z))
  (sqrt (/ (- x y) z))
  (neg (- x y))
  (neg z)
  (/ x z)
  (/ y z)
  (/ (* (cbrt (- x y)) (cbrt (- x y))) (* (cbrt z) (cbrt z)))
  (/ (cbrt (- x y)) (cbrt z))
  (/ (* (cbrt (- x y)) (cbrt (- x y))) (sqrt z))
  (/ (cbrt (- x y)) (sqrt z))
  (/ (* (cbrt (- x y)) (cbrt (- x y))) 1)
  (/ (cbrt (- x y)) z)
  (/ (sqrt (- x y)) (* (cbrt z) (cbrt z)))
  (/ (sqrt (- x y)) (cbrt z))
  (/ (sqrt (- x y)) (sqrt z))
  (/ (sqrt (- x y)) (sqrt z))
  (/ (sqrt (- x y)) 1)
  (/ (sqrt (- x y)) z)
  (/ 1 (* (cbrt z) (cbrt z)))
  (/ (- x y) (cbrt z))
  (/ 1 (sqrt z))
  (/ (- x y) (sqrt z))
  (/ 1 1)
  (/ (- x y) z)
  (/ (+ (sqrt x) (sqrt y)) (* (cbrt z) (cbrt z)))
  (/ (- (sqrt x) (sqrt y)) (cbrt z))
  (/ (+ (sqrt x) (sqrt y)) (sqrt z))
  (/ (- (sqrt x) (sqrt y)) (sqrt z))
  (/ (+ (sqrt x) (sqrt y)) 1)
  (/ (- (sqrt x) (sqrt y)) z)
  (/ 1 (* (cbrt z) (cbrt z)))
  (/ (- x y) (cbrt z))
  (/ 1 (sqrt z))
  (/ (- x y) (sqrt z))
  (/ 1 1)
  (/ (- x y) z)
  (/ 1 z)
  (/ z (- x y))
  (/ (- x y) (* (cbrt z) (cbrt z)))
  (/ (- x y) (sqrt z))
  (/ (- x y) 1)
  (/ z (cbrt (- x y)))
  (/ z (sqrt (- x y)))
  (/ z (- x y))
  (/ z (- (sqrt x) (sqrt y)))
  (/ z (- x y))
  (* z (+ (* x x) (+ (* y y) (* x y))))
  (* z (+ x y))
  (- (/ x z) (/ y z))
  (- (/ x z) (/ y z))
  (- (/ x z) (/ y z))
4.653 * * [simplify]: iteration  0 :  73  enodes  (cost  404 )
4.663 * * [simplify]: iteration  1 :  156  enodes  (cost  383 )
4.693 * * [simplify]: iteration  2 :  344  enodes  (cost  363 )
4.815 * * [simplify]: iteration  3 :  840  enodes  (cost  363 )
5.152 * * [simplify]: iteration  4 :  1960  enodes  (cost  362 )
6.728 * * [simplify]: iteration  done :  5000  enodes  (cost  362 )
6.728 * [simplify]: Simplified to:
   (log (/ (- x y) z))
  (log (/ (- x y) z))
  (exp (/ (- x y) z))
  (pow (/ (- x y) z) 3)
  (* (cbrt (/ (- x y) z)) (cbrt (/ (- x y) z)))
  (cbrt (/ (- x y) z))
  (pow (/ (- x y) z) 3)
  (sqrt (/ (- x y) z))
  (sqrt (/ (- x y) z))
  (- y x)
  (neg z)
  (/ x z)
  (/ y z)
  (/ (* (cbrt (- x y)) (cbrt (- x y))) (* (cbrt z) (cbrt z)))
  (/ (cbrt (- x y)) (cbrt z))
  (/ (* (cbrt (- x y)) (cbrt (- x y))) (sqrt z))
  (/ (cbrt (- x y)) (sqrt z))
  (* (cbrt (- x y)) (cbrt (- x y)))
  (/ (cbrt (- x y)) z)
  (/ (sqrt (- x y)) (* (cbrt z) (cbrt z)))
  (/ (sqrt (- x y)) (cbrt z))
  (/ (sqrt (- x y)) (sqrt z))
  (/ (sqrt (- x y)) (sqrt z))
  (sqrt (- x y))
  (/ (sqrt (- x y)) z)
  (/ 1 (* (cbrt z) (cbrt z)))
  (/ (- x y) (cbrt z))
  (/ 1 (sqrt z))
  (/ (- x y) (sqrt z))
  1
  (/ (- x y) z)
  (/ (+ (sqrt x) (sqrt y)) (* (cbrt z) (cbrt z)))
  (/ (- (sqrt x) (sqrt y)) (cbrt z))
  (/ (+ (sqrt x) (sqrt y)) (sqrt z))
  (/ (- (sqrt x) (sqrt y)) (sqrt z))
  (+ (sqrt y) (sqrt x))
  (/ (- (sqrt x) (sqrt y)) z)
  (/ 1 (* (cbrt z) (cbrt z)))
  (/ (- x y) (cbrt z))
  (/ 1 (sqrt z))
  (/ (- x y) (sqrt z))
  1
  (/ (- x y) z)
  (/ 1 z)
  (/ z (- x y))
  (/ (- x y) (* (cbrt z) (cbrt z)))
  (/ (- x y) (sqrt z))
  (- x y)
  (/ z (cbrt (- x y)))
  (/ z (sqrt (- x y)))
  (/ z (- x y))
  (/ z (- (sqrt x) (sqrt y)))
  (/ z (- x y))
  (* (+ (* x x) (* y (+ x y))) z)
  (* z (+ x y))
  (/ (- x y) z)
  (/ (- x y) z)
  (/ (- x y) z)
6.729 * * * [progress]: adding candidates to table
6.763 * [progress]: [Phase 3 of 3] Extracting.
6.765 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* 4.0 (- (/ (- x y) z) 0.5))
6.766 * * [simplify]: iteration  0 :  9  enodes  (cost  9 )
6.766 * * [simplify]: iteration  1 :  10  enodes  (cost  9 )
6.766 * * [simplify]: iteration  done :  10  enodes  (cost  9 )
6.766 * [simplify]: Simplified to:
   (* 4.0 (- (/ (- x y) z) 0.5))
7.740 * [regime-testing]: End program error score: 0.007875984498062257
7.822 * [regime-testing]: Target error score: 0.009824348356134662