20.158 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.025 * * * [progress]: [2/2] Setting up program.
0.028 * [progress]: [Phase 2 of 3] Improving.
0.028 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (* 4.0 (- (- x y) (* z 0.5))) z)
0.029 * * [simplify]: iteration  0 :  10  enodes  (cost  11 )
0.030 * * [simplify]: iteration  1 :  20  enodes  (cost  11 )
0.033 * * [simplify]: iteration  2 :  47  enodes  (cost  11 )
0.039 * * [simplify]: iteration  3 :  130  enodes  (cost  11 )
0.063 * * [simplify]: iteration  4 :  280  enodes  (cost  11 )
0.106 * * [simplify]: iteration  5 :  533  enodes  (cost  11 )
0.178 * * [simplify]: iteration  6 :  1018  enodes  (cost  11 )
0.350 * * [simplify]: iteration  7 :  1823  enodes  (cost  9 )
0.642 * * [simplify]: iteration  8 :  4735  enodes  (cost  9 )
1.159 * * [simplify]: iteration  done :  5000  enodes  (cost  9 )
1.159 * [simplify]: Simplified to:
   (* 4.0 (- (/ (- x y) z) 0.5))
1.163 * * [progress]: iteration 1 / 4
1.163 * * * [progress]: picking best candidate
1.166 * * * * [pick]: Picked  #<alt (λ (x y z) (* 4.0 (- (/ (- x y) z) 0.5)))>
1.166 * * * [progress]: localizing error
1.180 * * * [progress]: generating rewritten candidates
1.180 * * * * [progress]: [ 1 / 1 ] rewriting at (2 2 1)
1.189 * * * [progress]: generating series expansions
1.189 * * * * [progress]: [ 1 / 1 ] generating series at (2 2 1)
1.189 * [approximate]: Taking taylor expansion of (/ (- x y) z) in (x y z) around 0
1.189 * [taylor]: Taking taylor expansion of (/ (- x y) z) in z
1.189 * [taylor]: Taking taylor expansion of (- x y) in z
1.189 * [taylor]: Taking taylor expansion of x in z
1.189 * [taylor]: Taking taylor expansion of y in z
1.189 * [taylor]: Taking taylor expansion of z in z
1.189 * [taylor]: Taking taylor expansion of (/ (- x y) z) in y
1.189 * [taylor]: Taking taylor expansion of (- x y) in y
1.189 * [taylor]: Taking taylor expansion of x in y
1.189 * [taylor]: Taking taylor expansion of y in y
1.189 * [taylor]: Taking taylor expansion of z in y
1.189 * [taylor]: Taking taylor expansion of (/ (- x y) z) in x
1.189 * [taylor]: Taking taylor expansion of (- x y) in x
1.189 * [taylor]: Taking taylor expansion of x in x
1.189 * [taylor]: Taking taylor expansion of y in x
1.189 * [taylor]: Taking taylor expansion of z in x
1.189 * [taylor]: Taking taylor expansion of (/ (- x y) z) in x
1.189 * [taylor]: Taking taylor expansion of (- x y) in x
1.189 * [taylor]: Taking taylor expansion of x in x
1.189 * [taylor]: Taking taylor expansion of y in x
1.189 * [taylor]: Taking taylor expansion of z in x
1.189 * [taylor]: Taking taylor expansion of (* -1 (/ y z)) in y
1.189 * [taylor]: Taking taylor expansion of -1 in y
1.189 * [taylor]: Taking taylor expansion of (/ y z) in y
1.189 * [taylor]: Taking taylor expansion of y in y
1.189 * [taylor]: Taking taylor expansion of z in y
1.190 * [taylor]: Taking taylor expansion of (/ 1 z) in y
1.190 * [taylor]: Taking taylor expansion of z in y
1.190 * [taylor]: Taking taylor expansion of (/ 1 z) in z
1.190 * [taylor]: Taking taylor expansion of z in z
1.190 * [taylor]: Taking taylor expansion of (/ -1 z) in z
1.190 * [taylor]: Taking taylor expansion of -1 in z
1.190 * [taylor]: Taking taylor expansion of z in z
1.190 * [taylor]: Taking taylor expansion of 0 in y
1.190 * [taylor]: Taking taylor expansion of 0 in z
1.190 * [taylor]: Taking taylor expansion of 0 in z
1.190 * [taylor]: Taking taylor expansion of 0 in z
1.190 * [taylor]: Taking taylor expansion of 0 in y
1.190 * [taylor]: Taking taylor expansion of 0 in z
1.190 * [taylor]: Taking taylor expansion of 0 in z
1.191 * [taylor]: Taking taylor expansion of 0 in z
1.191 * [taylor]: Taking taylor expansion of 0 in z
1.191 * [approximate]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in (x y z) around 0
1.191 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in z
1.191 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in z
1.191 * [taylor]: Taking taylor expansion of (/ 1 x) in z
1.191 * [taylor]: Taking taylor expansion of x in z
1.191 * [taylor]: Taking taylor expansion of (/ 1 y) in z
1.191 * [taylor]: Taking taylor expansion of y in z
1.191 * [taylor]: Taking taylor expansion of z in z
1.191 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in y
1.191 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in y
1.191 * [taylor]: Taking taylor expansion of (/ 1 x) in y
1.191 * [taylor]: Taking taylor expansion of x in y
1.191 * [taylor]: Taking taylor expansion of (/ 1 y) in y
1.191 * [taylor]: Taking taylor expansion of y in y
1.191 * [taylor]: Taking taylor expansion of z in y
1.191 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in x
1.191 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
1.191 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.191 * [taylor]: Taking taylor expansion of x in x
1.191 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.191 * [taylor]: Taking taylor expansion of y in x
1.191 * [taylor]: Taking taylor expansion of z in x
1.191 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) z) in x
1.192 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
1.192 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.192 * [taylor]: Taking taylor expansion of x in x
1.192 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.192 * [taylor]: Taking taylor expansion of y in x
1.192 * [taylor]: Taking taylor expansion of z in x
1.192 * [taylor]: Taking taylor expansion of z in y
1.192 * [taylor]: Taking taylor expansion of (neg (/ z y)) in y
1.192 * [taylor]: Taking taylor expansion of (/ z y) in y
1.192 * [taylor]: Taking taylor expansion of z in y
1.192 * [taylor]: Taking taylor expansion of y in y
1.192 * [taylor]: Taking taylor expansion of (neg z) in z
1.192 * [taylor]: Taking taylor expansion of z in z
1.192 * [taylor]: Taking taylor expansion of z in z
1.192 * [taylor]: Taking taylor expansion of 0 in y
1.192 * [taylor]: Taking taylor expansion of 0 in z
1.192 * [taylor]: Taking taylor expansion of 0 in z
1.193 * [taylor]: Taking taylor expansion of 0 in y
1.193 * [taylor]: Taking taylor expansion of 0 in z
1.193 * [taylor]: Taking taylor expansion of 0 in z
1.193 * [taylor]: Taking taylor expansion of 0 in z
1.193 * [approximate]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in (x y z) around 0
1.193 * [taylor]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in z
1.193 * [taylor]: Taking taylor expansion of -1 in z
1.193 * [taylor]: Taking taylor expansion of (* (- (/ 1 y) (/ 1 x)) z) in z
1.193 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in z
1.193 * [taylor]: Taking taylor expansion of (/ 1 y) in z
1.193 * [taylor]: Taking taylor expansion of y in z
1.193 * [taylor]: Taking taylor expansion of (/ 1 x) in z
1.193 * [taylor]: Taking taylor expansion of x in z
1.193 * [taylor]: Taking taylor expansion of z in z
1.193 * [taylor]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in y
1.193 * [taylor]: Taking taylor expansion of -1 in y
1.193 * [taylor]: Taking taylor expansion of (* (- (/ 1 y) (/ 1 x)) z) in y
1.193 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in y
1.193 * [taylor]: Taking taylor expansion of (/ 1 y) in y
1.193 * [taylor]: Taking taylor expansion of y in y
1.193 * [taylor]: Taking taylor expansion of (/ 1 x) in y
1.193 * [taylor]: Taking taylor expansion of x in y
1.194 * [taylor]: Taking taylor expansion of z in y
1.194 * [taylor]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in x
1.194 * [taylor]: Taking taylor expansion of -1 in x
1.194 * [taylor]: Taking taylor expansion of (* (- (/ 1 y) (/ 1 x)) z) in x
1.194 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
1.194 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.194 * [taylor]: Taking taylor expansion of y in x
1.194 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.194 * [taylor]: Taking taylor expansion of x in x
1.194 * [taylor]: Taking taylor expansion of z in x
1.194 * [taylor]: Taking taylor expansion of (* -1 (* (- (/ 1 y) (/ 1 x)) z)) in x
1.194 * [taylor]: Taking taylor expansion of -1 in x
1.194 * [taylor]: Taking taylor expansion of (* (- (/ 1 y) (/ 1 x)) z) in x
1.194 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
1.194 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.194 * [taylor]: Taking taylor expansion of y in x
1.194 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.194 * [taylor]: Taking taylor expansion of x in x
1.194 * [taylor]: Taking taylor expansion of z in x
1.194 * [taylor]: Taking taylor expansion of z in y
1.194 * [taylor]: Taking taylor expansion of (neg (/ z y)) in y
1.194 * [taylor]: Taking taylor expansion of (/ z y) in y
1.194 * [taylor]: Taking taylor expansion of z in y
1.194 * [taylor]: Taking taylor expansion of y in y
1.194 * [taylor]: Taking taylor expansion of (neg z) in z
1.194 * [taylor]: Taking taylor expansion of z in z
1.194 * [taylor]: Taking taylor expansion of z in z
1.195 * [taylor]: Taking taylor expansion of 0 in y
1.195 * [taylor]: Taking taylor expansion of 0 in z
1.195 * [taylor]: Taking taylor expansion of 0 in z
1.195 * [taylor]: Taking taylor expansion of 0 in y
1.195 * [taylor]: Taking taylor expansion of 0 in z
1.195 * [taylor]: Taking taylor expansion of 0 in z
1.195 * [taylor]: Taking taylor expansion of 0 in z
1.195 * * * [progress]: simplifying candidates
1.196 * [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))
1.198 * * [simplify]: iteration  0 :  73  enodes  (cost  404 )
1.207 * * [simplify]: iteration  1 :  156  enodes  (cost  383 )
1.230 * * [simplify]: iteration  2 :  372  enodes  (cost  363 )
1.300 * * [simplify]: iteration  3 :  1009  enodes  (cost  363 )
1.496 * * [simplify]: iteration  4 :  2664  enodes  (cost  362 )
1.946 * * [simplify]: iteration  done :  5000  enodes  (cost  362 )
1.947 * [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)
1.947 * * * [progress]: adding candidates to table
1.989 * [progress]: [Phase 3 of 3] Extracting.
1.992 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* 4.0 (- (/ (- x y) z) 0.5))
1.992 * * [simplify]: iteration  0 :  9  enodes  (cost  9 )
1.993 * * [simplify]: iteration  1 :  10  enodes  (cost  9 )
1.993 * * [simplify]: iteration  done :  10  enodes  (cost  9 )
1.993 * [simplify]: Simplified to:
   (* 4.0 (- (/ (- x y) z) 0.5))
3.004 * [regime-testing]: End program error score: 0.007875984498062257
3.092 * [regime-testing]: Target error score: 0.009824348356134662