20.333 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.018 * * * [progress]: [2/2] Setting up program.
0.020 * [progress]: [Phase 2 of 3] Improving.
0.021 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (* 4.0 (- (- x y) (* z 0.5))) z)
0.021 * * [simplify]: iteration  0 :  10  enodes  (cost  11 )
0.023 * * [simplify]: iteration  1 :  20  enodes  (cost  11 )
0.025 * * [simplify]: iteration  2 :  47  enodes  (cost  11 )
0.032 * * [simplify]: iteration  3 :  129  enodes  (cost  11 )
0.056 * * [simplify]: iteration  4 :  270  enodes  (cost  11 )
0.121 * * [simplify]: iteration  5 :  497  enodes  (cost  11 )
0.226 * * [simplify]: iteration  6 :  762  enodes  (cost  11 )
0.474 * * [simplify]: iteration  7 :  1122  enodes  (cost  9 )
1.037 * * [simplify]: iteration  8 :  2855  enodes  (cost  9 )
3.038 * * [simplify]: iteration  done :  5000  enodes  (cost  9 )
3.038 * [simplify]: Simplified to:
   (* (- (/ (- x y) z) 0.5) 4.0)
3.047 * * [progress]: iteration 1 / 4
3.048 * * * [progress]: picking best candidate
3.049 * * * * [pick]: Picked  #<alt (λ (x y z) (* (- (/ (- x y) z) 0.5) 4.0))>
3.049 * * * [progress]: localizing error
3.055 * * * [progress]: generating rewritten candidates
3.055 * * * * [progress]: [ 1 / 1 ] rewriting at (2 1 1)
3.064 * * * [progress]: generating series expansions
3.064 * * * * [progress]: [ 1 / 1 ] generating series at (2 1 1)
3.065 * [approximate]: Taking taylor expansion of (/ (- x y) z) in (x y z) around 0
3.065 * [taylor]: Taking taylor expansion of (/ (- x y) z) in z
3.065 * [taylor]: Taking taylor expansion of (- x y) in z
3.065 * [taylor]: Taking taylor expansion of x in z
3.065 * [taylor]: Taking taylor expansion of y in z
3.065 * [taylor]: Taking taylor expansion of z in z
3.065 * [taylor]: Taking taylor expansion of (/ (- x y) z) in y
3.065 * [taylor]: Taking taylor expansion of (- x y) in y
3.065 * [taylor]: Taking taylor expansion of x in y
3.065 * [taylor]: Taking taylor expansion of y in y
3.065 * [taylor]: Taking taylor expansion of z in y
3.065 * [taylor]: Taking taylor expansion of (/ (- x y) z) in x
3.065 * [taylor]: Taking taylor expansion of (- x y) in x
3.065 * [taylor]: Taking taylor expansion of x in x
3.065 * [taylor]: Taking taylor expansion of y in x
3.065 * [taylor]: Taking taylor expansion of z in x
3.065 * [taylor]: Taking taylor expansion of (/ (- x y) z) in x
3.065 * [taylor]: Taking taylor expansion of (- x y) in x
3.065 * [taylor]: Taking taylor expansion of x in x
3.066 * [taylor]: Taking taylor expansion of y in x
3.066 * [taylor]: Taking taylor expansion of z in x
3.066 * [taylor]: Taking taylor expansion of (* -1 (/ y z)) in y
3.066 * [taylor]: Taking taylor expansion of -1 in y
3.066 * [taylor]: Taking taylor expansion of (/ y z) in y
3.066 * [taylor]: Taking taylor expansion of y in y
3.066 * [taylor]: Taking taylor expansion of z in y
3.066 * [taylor]: Taking taylor expansion of (/ 1 z) in y
3.066 * [taylor]: Taking taylor expansion of z in y
3.066 * [taylor]: Taking taylor expansion of (/ 1 z) in z
3.066 * [taylor]: Taking taylor expansion of z in z
3.067 * [taylor]: Taking taylor expansion of (/ -1 z) in z
3.067 * [taylor]: Taking taylor expansion of -1 in z
3.067 * [taylor]: Taking taylor expansion of z in z
3.068 * [taylor]: Taking taylor expansion of 0 in y
3.068 * [taylor]: Taking taylor expansion of 0 in z
3.068 * [taylor]: Taking taylor expansion of 0 in z
3.068 * [taylor]: Taking taylor expansion of 0 in z
3.070 * [taylor]: Taking taylor expansion of 0 in y
3.070 * [taylor]: Taking taylor expansion of 0 in z
3.070 * [taylor]: Taking taylor expansion of 0 in z
3.070 * [taylor]: Taking taylor expansion of 0 in z
3.070 * [taylor]: Taking taylor expansion of 0 in z
3.071 * [approximate]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in (x y z) around 0
3.071 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in z
3.071 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in z
3.071 * [taylor]: Taking taylor expansion of (/ 1 x) in z
3.071 * [taylor]: Taking taylor expansion of x in z
3.071 * [taylor]: Taking taylor expansion of (/ 1 y) in z
3.071 * [taylor]: Taking taylor expansion of y in z
3.071 * [taylor]: Taking taylor expansion of z in z
3.071 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in y
3.072 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in y
3.072 * [taylor]: Taking taylor expansion of (/ 1 x) in y
3.072 * [taylor]: Taking taylor expansion of x in y
3.072 * [taylor]: Taking taylor expansion of (/ 1 y) in y
3.072 * [taylor]: Taking taylor expansion of y in y
3.072 * [taylor]: Taking taylor expansion of z in y
3.072 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in x
3.072 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
3.072 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.072 * [taylor]: Taking taylor expansion of x in x
3.072 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.072 * [taylor]: Taking taylor expansion of y in x
3.072 * [taylor]: Taking taylor expansion of z in x
3.072 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in x
3.072 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
3.072 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.072 * [taylor]: Taking taylor expansion of x in x
3.073 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.073 * [taylor]: Taking taylor expansion of y in x
3.073 * [taylor]: Taking taylor expansion of z in x
3.073 * [taylor]: Taking taylor expansion of z in y
3.074 * [taylor]: Taking taylor expansion of (- (/ z y)) in y
3.074 * [taylor]: Taking taylor expansion of (/ z y) in y
3.074 * [taylor]: Taking taylor expansion of z in y
3.074 * [taylor]: Taking taylor expansion of y in y
3.074 * [taylor]: Taking taylor expansion of (- z) in z
3.074 * [taylor]: Taking taylor expansion of z in z
3.074 * [taylor]: Taking taylor expansion of z in z
3.076 * [taylor]: Taking taylor expansion of 0 in y
3.076 * [taylor]: Taking taylor expansion of 0 in z
3.076 * [taylor]: Taking taylor expansion of 0 in z
3.078 * [taylor]: Taking taylor expansion of 0 in y
3.078 * [taylor]: Taking taylor expansion of 0 in z
3.079 * [taylor]: Taking taylor expansion of 0 in z
3.079 * [taylor]: Taking taylor expansion of 0 in z
3.080 * [approximate]: Taking taylor expansion of (* -1 (* z (- (/ 1 y) (/ 1 x)))) in (x y z) around 0
3.080 * [taylor]: Taking taylor expansion of (* -1 (* z (- (/ 1 y) (/ 1 x)))) in z
3.080 * [taylor]: Taking taylor expansion of -1 in z
3.080 * [taylor]: Taking taylor expansion of (* z (- (/ 1 y) (/ 1 x))) in z
3.080 * [taylor]: Taking taylor expansion of z in z
3.080 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in z
3.080 * [taylor]: Taking taylor expansion of (/ 1 y) in z
3.080 * [taylor]: Taking taylor expansion of y in z
3.080 * [taylor]: Taking taylor expansion of (/ 1 x) in z
3.080 * [taylor]: Taking taylor expansion of x in z
3.080 * [taylor]: Taking taylor expansion of (* -1 (* z (- (/ 1 y) (/ 1 x)))) in y
3.080 * [taylor]: Taking taylor expansion of -1 in y
3.080 * [taylor]: Taking taylor expansion of (* z (- (/ 1 y) (/ 1 x))) in y
3.080 * [taylor]: Taking taylor expansion of z in y
3.080 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in y
3.080 * [taylor]: Taking taylor expansion of (/ 1 y) in y
3.080 * [taylor]: Taking taylor expansion of y in y
3.080 * [taylor]: Taking taylor expansion of (/ 1 x) in y
3.080 * [taylor]: Taking taylor expansion of x in y
3.080 * [taylor]: Taking taylor expansion of (* -1 (* z (- (/ 1 y) (/ 1 x)))) in x
3.080 * [taylor]: Taking taylor expansion of -1 in x
3.081 * [taylor]: Taking taylor expansion of (* z (- (/ 1 y) (/ 1 x))) in x
3.081 * [taylor]: Taking taylor expansion of z in x
3.081 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
3.081 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.081 * [taylor]: Taking taylor expansion of y in x
3.081 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.081 * [taylor]: Taking taylor expansion of x in x
3.081 * [taylor]: Taking taylor expansion of (* -1 (* z (- (/ 1 y) (/ 1 x)))) in x
3.081 * [taylor]: Taking taylor expansion of -1 in x
3.081 * [taylor]: Taking taylor expansion of (* z (- (/ 1 y) (/ 1 x))) in x
3.081 * [taylor]: Taking taylor expansion of z in x
3.081 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
3.081 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.081 * [taylor]: Taking taylor expansion of y in x
3.081 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.081 * [taylor]: Taking taylor expansion of x in x
3.082 * [taylor]: Taking taylor expansion of z in y
3.083 * [taylor]: Taking taylor expansion of (- (/ z y)) in y
3.083 * [taylor]: Taking taylor expansion of (/ z y) in y
3.083 * [taylor]: Taking taylor expansion of z in y
3.083 * [taylor]: Taking taylor expansion of y in y
3.083 * [taylor]: Taking taylor expansion of (- z) in z
3.083 * [taylor]: Taking taylor expansion of z in z
3.083 * [taylor]: Taking taylor expansion of z in z
3.085 * [taylor]: Taking taylor expansion of 0 in y
3.086 * [taylor]: Taking taylor expansion of 0 in z
3.086 * [taylor]: Taking taylor expansion of 0 in z
3.088 * [taylor]: Taking taylor expansion of 0 in y
3.088 * [taylor]: Taking taylor expansion of 0 in z
3.089 * [taylor]: Taking taylor expansion of 0 in z
3.089 * [taylor]: Taking taylor expansion of 0 in z
3.090 * * * [progress]: simplifying candidates
3.091 * [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))
  (- (- x y))
  (- 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))
3.093 * * [simplify]: iteration  0 :  73  enodes  (cost  404 )
3.103 * * [simplify]: iteration  1 :  156  enodes  (cost  383 )
3.135 * * [simplify]: iteration  2 :  344  enodes  (cost  363 )
3.234 * * [simplify]: iteration  3 :  840  enodes  (cost  363 )
3.504 * * [simplify]: iteration  4 :  1964  enodes  (cost  362 )
4.439 * * [simplify]: iteration  done :  5000  enodes  (cost  362 )
4.440 * [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)
  (- 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 x) (sqrt y))
  (/ (- (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))
  (* (+ (* y (+ x y)) (* x x)) z)
  (* z (+ x y))
  (/ (- x y) z)
  (/ (- x y) z)
  (/ (- x y) z)
4.440 * * * [progress]: adding candidates to table
4.520 * [progress]: [Phase 3 of 3] Extracting.
4.524 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* (- (/ (- x y) z) 0.5) 4.0)
4.524 * * [simplify]: iteration  0 :  9  enodes  (cost  9 )
4.524 * * [simplify]: iteration  1 :  10  enodes  (cost  9 )
4.524 * * [simplify]: iteration  done :  10  enodes  (cost  9 )
4.524 * [simplify]: Simplified to:
   (* (- (/ (- x y) z) 0.5) 4.0)
5.063 * [regime-testing]: End program error score: 0.007416168032865028
5.085 * [regime-testing]: Target error score: 0.008489422502263847