15.109 * [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 (- 1.0 (* x 0.5)))
0.015 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
0.016 * * [simplify]: iteration  1 :  10  enodes  (cost  7 )
0.017 * * [simplify]: iteration  2 :  23  enodes  (cost  7 )
0.020 * * [simplify]: iteration  3 :  43  enodes  (cost  7 )
0.026 * * [simplify]: iteration  4 :  55  enodes  (cost  7 )
0.033 * * [simplify]: iteration  done :  55  enodes  (cost  7 )
0.033 * [simplify]: Simplified to:
   (* x (- 1.0 (* x 0.5)))
0.033 * * [progress]: iteration 1 / 4
0.033 * * * [progress]: picking best candidate
0.034 * * * * [pick]: Picked  #<alt (λ (x) (* x (- 1.0 (* x 0.5))))>
0.034 * * * [progress]: localizing error
0.038 * * * [progress]: generating rewritten candidates
0.038 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.048 * * * [progress]: generating series expansions
0.048 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.048 * [approximate]: Taking taylor expansion of (* x (- 1.0 (* 0.5 x))) in (x) around 0
0.048 * [taylor]: Taking taylor expansion of (* x (- 1.0 (* 0.5 x))) in x
0.048 * [taylor]: Taking taylor expansion of x in x
0.048 * [taylor]: Taking taylor expansion of (- 1.0 (* 0.5 x)) in x
0.048 * [taylor]: Taking taylor expansion of 1.0 in x
0.048 * [taylor]: Taking taylor expansion of (* 0.5 x) in x
0.048 * [taylor]: Taking taylor expansion of 0.5 in x
0.048 * [taylor]: Taking taylor expansion of x in x
0.048 * [taylor]: Taking taylor expansion of (* x (- 1.0 (* 0.5 x))) in x
0.048 * [taylor]: Taking taylor expansion of x in x
0.048 * [taylor]: Taking taylor expansion of (- 1.0 (* 0.5 x)) in x
0.048 * [taylor]: Taking taylor expansion of 1.0 in x
0.048 * [taylor]: Taking taylor expansion of (* 0.5 x) in x
0.048 * [taylor]: Taking taylor expansion of 0.5 in x
0.048 * [taylor]: Taking taylor expansion of x in x
0.073 * [approximate]: Taking taylor expansion of (/ (- 1.0 (* 0.5 (/ 1 x))) x) in (x) around 0
0.073 * [taylor]: Taking taylor expansion of (/ (- 1.0 (* 0.5 (/ 1 x))) x) in x
0.073 * [taylor]: Taking taylor expansion of (- 1.0 (* 0.5 (/ 1 x))) in x
0.073 * [taylor]: Taking taylor expansion of 1.0 in x
0.073 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 x)) in x
0.073 * [taylor]: Taking taylor expansion of 0.5 in x
0.073 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.073 * [taylor]: Taking taylor expansion of x in x
0.073 * [taylor]: Taking taylor expansion of x in x
0.075 * [taylor]: Taking taylor expansion of (/ (- 1.0 (* 0.5 (/ 1 x))) x) in x
0.075 * [taylor]: Taking taylor expansion of (- 1.0 (* 0.5 (/ 1 x))) in x
0.075 * [taylor]: Taking taylor expansion of 1.0 in x
0.075 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 x)) in x
0.075 * [taylor]: Taking taylor expansion of 0.5 in x
0.075 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.075 * [taylor]: Taking taylor expansion of x in x
0.075 * [taylor]: Taking taylor expansion of x in x
0.093 * [approximate]: Taking taylor expansion of (* -1 (/ (+ (* 0.5 (/ 1 x)) 1.0) x)) in (x) around 0
0.093 * [taylor]: Taking taylor expansion of (* -1 (/ (+ (* 0.5 (/ 1 x)) 1.0) x)) in x
0.093 * [taylor]: Taking taylor expansion of -1 in x
0.093 * [taylor]: Taking taylor expansion of (/ (+ (* 0.5 (/ 1 x)) 1.0) x) in x
0.093 * [taylor]: Taking taylor expansion of (+ (* 0.5 (/ 1 x)) 1.0) in x
0.093 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 x)) in x
0.093 * [taylor]: Taking taylor expansion of 0.5 in x
0.093 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.093 * [taylor]: Taking taylor expansion of x in x
0.094 * [taylor]: Taking taylor expansion of 1.0 in x
0.094 * [taylor]: Taking taylor expansion of x in x
0.095 * [taylor]: Taking taylor expansion of (* -1 (/ (+ (* 0.5 (/ 1 x)) 1.0) x)) in x
0.095 * [taylor]: Taking taylor expansion of -1 in x
0.095 * [taylor]: Taking taylor expansion of (/ (+ (* 0.5 (/ 1 x)) 1.0) x) in x
0.095 * [taylor]: Taking taylor expansion of (+ (* 0.5 (/ 1 x)) 1.0) in x
0.095 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 x)) in x
0.095 * [taylor]: Taking taylor expansion of 0.5 in x
0.095 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.095 * [taylor]: Taking taylor expansion of x in x
0.095 * [taylor]: Taking taylor expansion of 1.0 in x
0.095 * [taylor]: Taking taylor expansion of x in x
0.117 * * * [progress]: simplifying candidates
0.118 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (expm1 (* x (- 1.0 (* x 0.5))))
  (log1p (* x (- 1.0 (* x 0.5))))
  (* x (- 1.0 (* x 0.5)))
  (+ (log x) (log (- 1.0 (* x 0.5))))
  (log (* x (- 1.0 (* x 0.5))))
  (exp (* x (- 1.0 (* x 0.5))))
  (* (* (* x x) x) (* (* (- 1.0 (* x 0.5)) (- 1.0 (* x 0.5))) (- 1.0 (* x 0.5))))
  (* (cbrt (* x (- 1.0 (* x 0.5)))) (cbrt (* x (- 1.0 (* x 0.5)))))
  (cbrt (* x (- 1.0 (* x 0.5))))
  (* (* (* x (- 1.0 (* x 0.5))) (* x (- 1.0 (* x 0.5)))) (* x (- 1.0 (* x 0.5))))
  (sqrt (* x (- 1.0 (* x 0.5))))
  (sqrt (* x (- 1.0 (* x 0.5))))
  (* (sqrt x) (sqrt (- 1.0 (* x 0.5))))
  (* (sqrt x) (sqrt (- 1.0 (* x 0.5))))
  (* x (fma (* (cbrt 1.0) (cbrt 1.0)) (cbrt 1.0) (- (* 0.5 x))))
  (* x (fma (- 0.5) x (* 0.5 x)))
  (* x (fma (sqrt 1.0) (sqrt 1.0) (- (* 0.5 x))))
  (* x (fma (- 0.5) x (* 0.5 x)))
  (* x (fma 1 1.0 (- (* 0.5 x))))
  (* x (fma (- 0.5) x (* 0.5 x)))
  (* x 1.0)
  (* x (- (* x 0.5)))
  (* x 1.0)
  (* x (- (* x 0.5)))
  (* (fma (* (cbrt 1.0) (cbrt 1.0)) (cbrt 1.0) (- (* 0.5 x))) x)
  (* (fma (- 0.5) x (* 0.5 x)) x)
  (* (fma (sqrt 1.0) (sqrt 1.0) (- (* 0.5 x))) x)
  (* (fma (- 0.5) x (* 0.5 x)) x)
  (* (fma 1 1.0 (- (* 0.5 x))) x)
  (* (fma (- 0.5) x (* 0.5 x)) x)
  (* 1.0 x)
  (* (- (* x 0.5)) x)
  (* 1.0 x)
  (* (- (* x 0.5)) x)
  (* x (* (cbrt (- 1.0 (* x 0.5))) (cbrt (- 1.0 (* x 0.5)))))
  (* x (sqrt (- 1.0 (* x 0.5))))
  (* x 1)
  (* (cbrt x) (- 1.0 (* x 0.5)))
  (* (sqrt x) (- 1.0 (* x 0.5)))
  (* x (- 1.0 (* x 0.5)))
  (* x (- (pow 1.0 3) (pow (* x 0.5) 3)))
  (* x (- (* 1.0 1.0) (* (* x 0.5) (* x 0.5))))
  (- (* 1.0 x) (* 0.5 (pow x 2)))
  (- (* 1.0 x) (* 0.5 (pow x 2)))
  (- (* 1.0 x) (* 0.5 (pow x 2)))
0.120 * * [simplify]: iteration  0 :  71  enodes  (cost  411 )
0.138 * * [simplify]: iteration  1 :  151  enodes  (cost  408 )
0.172 * * [simplify]: iteration  2 :  401  enodes  (cost  356 )
0.316 * * [simplify]: iteration  3 :  1387  enodes  (cost  347 )
1.491 * * [simplify]: iteration  done :  5000  enodes  (cost  341 )
1.492 * [simplify]: Simplified to:
   (expm1 (* x (- 1.0 (* x 0.5))))
  (log1p (* x (- 1.0 (* x 0.5))))
  (* x (- 1.0 (* x 0.5)))
  (log (* x (- 1.0 (* x 0.5))))
  (log (* x (- 1.0 (* x 0.5))))
  (exp (* x (- 1.0 (* x 0.5))))
  (pow (* x (- 1.0 (* x 0.5))) 3)
  (* (cbrt (* x (- 1.0 (* x 0.5)))) (cbrt (* x (- 1.0 (* x 0.5)))))
  (cbrt (* x (- 1.0 (* x 0.5))))
  (pow (* x (- 1.0 (* x 0.5))) 3)
  (sqrt (* x (- 1.0 (* x 0.5))))
  (sqrt (* x (- 1.0 (* x 0.5))))
  (* (sqrt x) (sqrt (- 1.0 (* x 0.5))))
  (* (sqrt x) (sqrt (- 1.0 (* x 0.5))))
  (* (fma (- x) 0.5 (pow (cbrt 1.0) 3)) x)
  (* (* x (- x x)) 0.5)
  (* x (- 1.0 (* x 0.5)))
  (* (* x (- x x)) 0.5)
  (* x (- 1.0 (* x 0.5)))
  (* (* x (- x x)) 0.5)
  (* 1.0 x)
  (* (* x 0.5) (- x))
  (* 1.0 x)
  (* (* x 0.5) (- x))
  (* (fma (- x) 0.5 (pow (cbrt 1.0) 3)) x)
  (* (* x (- x x)) 0.5)
  (* x (- 1.0 (* x 0.5)))
  (* (* x (- x x)) 0.5)
  (* x (- 1.0 (* x 0.5)))
  (* (* x (- x x)) 0.5)
  (* 1.0 x)
  (* (* x 0.5) (- x))
  (* 1.0 x)
  (* (* x 0.5) (- x))
  (* x (* (cbrt (- 1.0 (* x 0.5))) (cbrt (- 1.0 (* x 0.5)))))
  (* x (sqrt (- 1.0 (* x 0.5))))
  x
  (* (cbrt x) (- 1.0 (* x 0.5)))
  (* (sqrt x) (- 1.0 (* x 0.5)))
  (* x (- 1.0 (* x 0.5)))
  (* x (- (pow 1.0 3) (pow (* x 0.5) 3)))
  (* (fma x 0.5 1.0) (* x (- 1.0 (* x 0.5))))
  (* x (- 1.0 (* x 0.5)))
  (* x (- 1.0 (* x 0.5)))
  (* x (- 1.0 (* x 0.5)))
1.492 * * * [progress]: adding candidates to table
1.538 * * [progress]: iteration 2 / 4
1.538 * * * [progress]: picking best candidate
1.539 * * * * [pick]: Picked  #<alt (λ (x) (+ (* 1.0 x) (* (* x 0.5) (- x))))>
1.539 * * * [progress]: localizing error
1.545 * * * [progress]: generating rewritten candidates
1.545 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
1.549 * * * [progress]: generating series expansions
1.549 * * * * [progress]: [ 1 / 1 ] generating series at (2)
1.549 * [approximate]: Taking taylor expansion of (- (* 1.0 x) (* 0.5 (pow x 2))) in (x) around 0
1.549 * [taylor]: Taking taylor expansion of (- (* 1.0 x) (* 0.5 (pow x 2))) in x
1.549 * [taylor]: Taking taylor expansion of (* 1.0 x) in x
1.549 * [taylor]: Taking taylor expansion of 1.0 in x
1.549 * [taylor]: Taking taylor expansion of x in x
1.549 * [taylor]: Taking taylor expansion of (* 0.5 (pow x 2)) in x
1.549 * [taylor]: Taking taylor expansion of 0.5 in x
1.549 * [taylor]: Taking taylor expansion of (pow x 2) in x
1.549 * [taylor]: Taking taylor expansion of x in x
1.549 * [taylor]: Taking taylor expansion of (- (* 1.0 x) (* 0.5 (pow x 2))) in x
1.549 * [taylor]: Taking taylor expansion of (* 1.0 x) in x
1.549 * [taylor]: Taking taylor expansion of 1.0 in x
1.549 * [taylor]: Taking taylor expansion of x in x
1.550 * [taylor]: Taking taylor expansion of (* 0.5 (pow x 2)) in x
1.550 * [taylor]: Taking taylor expansion of 0.5 in x
1.550 * [taylor]: Taking taylor expansion of (pow x 2) in x
1.550 * [taylor]: Taking taylor expansion of x in x
1.568 * [approximate]: Taking taylor expansion of (- (* 1.0 (/ 1 x)) (* 0.5 (/ 1 (pow x 2)))) in (x) around 0
1.568 * [taylor]: Taking taylor expansion of (- (* 1.0 (/ 1 x)) (* 0.5 (/ 1 (pow x 2)))) in x
1.568 * [taylor]: Taking taylor expansion of (* 1.0 (/ 1 x)) in x
1.568 * [taylor]: Taking taylor expansion of 1.0 in x
1.568 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.568 * [taylor]: Taking taylor expansion of x in x
1.568 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 (pow x 2))) in x
1.568 * [taylor]: Taking taylor expansion of 0.5 in x
1.569 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
1.569 * [taylor]: Taking taylor expansion of (pow x 2) in x
1.569 * [taylor]: Taking taylor expansion of x in x
1.569 * [taylor]: Taking taylor expansion of (- (* 1.0 (/ 1 x)) (* 0.5 (/ 1 (pow x 2)))) in x
1.569 * [taylor]: Taking taylor expansion of (* 1.0 (/ 1 x)) in x
1.569 * [taylor]: Taking taylor expansion of 1.0 in x
1.569 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.569 * [taylor]: Taking taylor expansion of x in x
1.570 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 (pow x 2))) in x
1.570 * [taylor]: Taking taylor expansion of 0.5 in x
1.570 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
1.570 * [taylor]: Taking taylor expansion of (pow x 2) in x
1.570 * [taylor]: Taking taylor expansion of x in x
1.597 * [approximate]: Taking taylor expansion of (- (+ (* 0.5 (/ 1 (pow x 2))) (* 1.0 (/ 1 x)))) in (x) around 0
1.597 * [taylor]: Taking taylor expansion of (- (+ (* 0.5 (/ 1 (pow x 2))) (* 1.0 (/ 1 x)))) in x
1.597 * [taylor]: Taking taylor expansion of (+ (* 0.5 (/ 1 (pow x 2))) (* 1.0 (/ 1 x))) in x
1.597 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 (pow x 2))) in x
1.597 * [taylor]: Taking taylor expansion of 0.5 in x
1.597 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
1.597 * [taylor]: Taking taylor expansion of (pow x 2) in x
1.597 * [taylor]: Taking taylor expansion of x in x
1.598 * [taylor]: Taking taylor expansion of (* 1.0 (/ 1 x)) in x
1.598 * [taylor]: Taking taylor expansion of 1.0 in x
1.598 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.598 * [taylor]: Taking taylor expansion of x in x
1.598 * [taylor]: Taking taylor expansion of (- (+ (* 0.5 (/ 1 (pow x 2))) (* 1.0 (/ 1 x)))) in x
1.598 * [taylor]: Taking taylor expansion of (+ (* 0.5 (/ 1 (pow x 2))) (* 1.0 (/ 1 x))) in x
1.598 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 (pow x 2))) in x
1.598 * [taylor]: Taking taylor expansion of 0.5 in x
1.598 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
1.598 * [taylor]: Taking taylor expansion of (pow x 2) in x
1.598 * [taylor]: Taking taylor expansion of x in x
1.599 * [taylor]: Taking taylor expansion of (* 1.0 (/ 1 x)) in x
1.599 * [taylor]: Taking taylor expansion of 1.0 in x
1.599 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.599 * [taylor]: Taking taylor expansion of x in x
1.624 * * * [progress]: simplifying candidates
1.624 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (expm1 (+ (* 1.0 x) (* (* x 0.5) (- x))))
  (log1p (+ (* 1.0 x) (* (* x 0.5) (- x))))
  (* (exp (* 1.0 x)) (exp (* (* x 0.5) (- x))))
  (log (+ (* 1.0 x) (* (* x 0.5) (- x))))
  (exp (+ (* 1.0 x) (* (* x 0.5) (- x))))
  (* (cbrt (+ (* 1.0 x) (* (* x 0.5) (- x)))) (cbrt (+ (* 1.0 x) (* (* x 0.5) (- x)))))
  (cbrt (+ (* 1.0 x) (* (* x 0.5) (- x))))
  (* (* (+ (* 1.0 x) (* (* x 0.5) (- x))) (+ (* 1.0 x) (* (* x 0.5) (- x)))) (+ (* 1.0 x) (* (* x 0.5) (- x))))
  (sqrt (+ (* 1.0 x) (* (* x 0.5) (- x))))
  (sqrt (+ (* 1.0 x) (* (* x 0.5) (- x))))
  (+ (pow (* 1.0 x) 3) (pow (* (* x 0.5) (- x)) 3))
  (+ (* (* 1.0 x) (* 1.0 x)) (- (* (* (* x 0.5) (- x)) (* (* x 0.5) (- x))) (* (* 1.0 x) (* (* x 0.5) (- x)))))
  (- (* (* 1.0 x) (* 1.0 x)) (* (* (* x 0.5) (- x)) (* (* x 0.5) (- x))))
  (- (* 1.0 x) (* (* x 0.5) (- x)))
  (- (* 1.0 x) (* 0.5 (pow x 2)))
  (- (* 1.0 x) (* 0.5 (pow x 2)))
  (- (* 1.0 x) (* 0.5 (pow x 2)))
1.626 * * [simplify]: iteration  0 :  35  enodes  (cost  248 )
1.632 * * [simplify]: iteration  1 :  122  enodes  (cost  225 )
1.679 * * [simplify]: iteration  2 :  506  enodes  (cost  186 )
2.196 * * [simplify]: iteration  3 :  2363  enodes  (cost  164 )
3.562 * * [simplify]: iteration  done :  5000  enodes  (cost  164 )
3.563 * [simplify]: Simplified to:
   (expm1 (* (- 1.0 (* x 0.5)) x))
  (log1p (* (- 1.0 (* x 0.5)) x))
  (pow (exp x) (- 1.0 (* x 0.5)))
  (log (* (- 1.0 (* x 0.5)) x))
  (pow (exp x) (- 1.0 (* x 0.5)))
  (* (cbrt (* (- 1.0 (* x 0.5)) x)) (cbrt (* (- 1.0 (* x 0.5)) x)))
  (cbrt (* (- 1.0 (* x 0.5)) x))
  (pow (* (- 1.0 (* x 0.5)) x) 3)
  (sqrt (* (- 1.0 (* x 0.5)) x))
  (sqrt (* (- 1.0 (* x 0.5)) x))
  (- (pow (* 1.0 x) 3) (pow (* (* x 0.5) x) 3))
  (fma (* 1.0 (pow x 2)) 1.0 (* (* (pow x 3) 0.5) (+ 1.0 (* x 0.5))))
  (* (* (pow x 2) (- 1.0 (* x 0.5))) (+ 1.0 (* x 0.5)))
  (* (+ 1.0 (* x 0.5)) x)
  (* (- 1.0 (* x 0.5)) x)
  (* (- 1.0 (* x 0.5)) x)
  (* (- 1.0 (* x 0.5)) x)
3.563 * * * [progress]: adding candidates to table
3.599 * [progress]: [Phase 3 of 3] Extracting.
3.599 * * [regime]: Finding splitpoints for: (#<alt (λ (x) (+ (* 1.0 x) (* (* x 0.5) (- x))))> #<alt (λ (x) (* x (- 1.0 (* x 0.5))))>)
3.600 * * * [regime-changes]: Trying 2 branch expressions: ((* x (- 1.0 (* x 0.5))) x)
3.600 * * * * [regimes]: Trying to branch on (* x (- 1.0 (* x 0.5))) from (#<alt (λ (x) (+ (* 1.0 x) (* (* x 0.5) (- x))))> #<alt (λ (x) (* x (- 1.0 (* x 0.5))))>)
3.609 * * * * [regimes]: Trying to branch on x from (#<alt (λ (x) (+ (* 1.0 x) (* (* x 0.5) (- x))))> #<alt (λ (x) (* x (- 1.0 (* x 0.5))))>)
3.618 * * * [regime]: Found split indices: #<option (#s(si 0 255))>
3.618 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (+ (* 1.0 x) (* (* x 0.5) (- x)))
3.619 * * [simplify]: iteration  0 :  8  enodes  (cost  10 )
3.619 * * [simplify]: iteration  1 :  14  enodes  (cost  10 )
3.620 * * [simplify]: iteration  2 :  17  enodes  (cost  10 )
3.620 * * [simplify]: iteration  3 :  23  enodes  (cost  10 )
3.621 * * [simplify]: iteration  done :  23  enodes  (cost  10 )
3.621 * [simplify]: Simplified to:
   (+ (* 1.0 x) (* (* x 0.5) (- x)))
3.955 * [regime-testing]: Baseline error score: 0.008876109513689211
3.956 * [regime-testing]: Oracle error score: 0.00025003125390673836
3.956 * [regime-testing]: End program error score: 0.008876109513689211