0.828 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.282 * * * [progress]: [2/2] Setting up program.
0.285 * [progress]: [Phase 2 of 3] Improving.
0.288 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* (sqrt (- x 1.0)) (sqrt x))
0.290 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
0.295 * * [simplify]: iteration  1 :  9  enodes  (cost  7 )
0.296 * * [simplify]: iteration  2 :  10  enodes  (cost  7 )
0.297 * * [simplify]: iteration  done :  10  enodes  (cost  7 )
0.297 * [simplify]: Simplified to:
   (* (sqrt (- x 1.0)) (sqrt x))
0.298 * * [progress]: iteration 1 / 4
0.298 * * * [progress]: picking best candidate
0.300 * * * * [pick]: Picked  #<alt (λ (x) (* (sqrt (- x 1.0)) (sqrt x)))>
0.300 * * * [progress]: localizing error
0.307 * * * [progress]: generating rewritten candidates
0.307 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.324 * * * [progress]: generating series expansions
0.324 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.329 * [approximate]: Taking taylor expansion of (sqrt (* (- x 1.0) x)) in (x) around 0
0.329 * [taylor]: Taking taylor expansion of (sqrt (* (- x 1.0) x)) in x
0.329 * [taylor]: Taking taylor expansion of (* (- x 1.0) x) in x
0.329 * [taylor]: Taking taylor expansion of (- x 1.0) in x
0.329 * [taylor]: Taking taylor expansion of x in x
0.329 * [taylor]: Taking taylor expansion of 1.0 in x
0.330 * [taylor]: Taking taylor expansion of x in x
0.334 * [taylor]: Taking taylor expansion of (sqrt (* (- x 1.0) x)) in x
0.334 * [taylor]: Taking taylor expansion of (* (- x 1.0) x) in x
0.334 * [taylor]: Taking taylor expansion of (- x 1.0) in x
0.334 * [taylor]: Taking taylor expansion of x in x
0.334 * [taylor]: Taking taylor expansion of 1.0 in x
0.334 * [taylor]: Taking taylor expansion of x in x
0.356 * [approximate]: Taking taylor expansion of (sqrt (/ (- (/ 1 x) 1.0) x)) in (x) around 0
0.356 * [taylor]: Taking taylor expansion of (sqrt (/ (- (/ 1 x) 1.0) x)) in x
0.356 * [taylor]: Taking taylor expansion of (/ (- (/ 1 x) 1.0) x) in x
0.356 * [taylor]: Taking taylor expansion of (- (/ 1 x) 1.0) in x
0.356 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.356 * [taylor]: Taking taylor expansion of x in x
0.357 * [taylor]: Taking taylor expansion of 1.0 in x
0.357 * [taylor]: Taking taylor expansion of x in x
0.361 * [taylor]: Taking taylor expansion of (sqrt (/ (- (/ 1 x) 1.0) x)) in x
0.361 * [taylor]: Taking taylor expansion of (/ (- (/ 1 x) 1.0) x) in x
0.361 * [taylor]: Taking taylor expansion of (- (/ 1 x) 1.0) in x
0.362 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.362 * [taylor]: Taking taylor expansion of x in x
0.362 * [taylor]: Taking taylor expansion of 1.0 in x
0.362 * [taylor]: Taking taylor expansion of x in x
0.370 * [approximate]: Taking taylor expansion of (* (sqrt (- (+ 1.0 (/ 1 x)))) (sqrt (/ -1 x))) in (x) around 0
0.370 * [taylor]: Taking taylor expansion of (* (sqrt (- (+ 1.0 (/ 1 x)))) (sqrt (/ -1 x))) in x
0.370 * [taylor]: Taking taylor expansion of (sqrt (- (+ 1.0 (/ 1 x)))) in x
0.370 * [taylor]: Taking taylor expansion of (- (+ 1.0 (/ 1 x))) in x
0.370 * [taylor]: Taking taylor expansion of (+ 1.0 (/ 1 x)) in x
0.370 * [taylor]: Taking taylor expansion of 1.0 in x
0.370 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.370 * [taylor]: Taking taylor expansion of x in x
0.372 * [taylor]: Taking taylor expansion of (sqrt (/ -1 x)) in x
0.372 * [taylor]: Taking taylor expansion of (/ -1 x) in x
0.372 * [taylor]: Taking taylor expansion of -1 in x
0.372 * [taylor]: Taking taylor expansion of x in x
0.374 * [taylor]: Taking taylor expansion of (* (sqrt (- (+ 1.0 (/ 1 x)))) (sqrt (/ -1 x))) in x
0.374 * [taylor]: Taking taylor expansion of (sqrt (- (+ 1.0 (/ 1 x)))) in x
0.374 * [taylor]: Taking taylor expansion of (- (+ 1.0 (/ 1 x))) in x
0.374 * [taylor]: Taking taylor expansion of (+ 1.0 (/ 1 x)) in x
0.374 * [taylor]: Taking taylor expansion of 1.0 in x
0.374 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.374 * [taylor]: Taking taylor expansion of x in x
0.375 * [taylor]: Taking taylor expansion of (sqrt (/ -1 x)) in x
0.376 * [taylor]: Taking taylor expansion of (/ -1 x) in x
0.376 * [taylor]: Taking taylor expansion of -1 in x
0.376 * [taylor]: Taking taylor expansion of x in x
0.403 * * * [progress]: simplifying candidates
0.404 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* (- x 1.0) x)
  (* (sqrt (- x 1.0)) (sqrt x))
  (* (- x 1.0) x)
  (+ (log (sqrt (- x 1.0))) (log (sqrt x)))
  (log (* (sqrt (- x 1.0)) (sqrt x)))
  (exp (* (sqrt (- x 1.0)) (sqrt x)))
  (* (* (* (sqrt (- x 1.0)) (sqrt (- x 1.0))) (sqrt (- x 1.0))) (* (* (sqrt x) (sqrt x)) (sqrt x)))
  (* (cbrt (* (sqrt (- x 1.0)) (sqrt x))) (cbrt (* (sqrt (- x 1.0)) (sqrt x))))
  (cbrt (* (sqrt (- x 1.0)) (sqrt x)))
  (* (* (* (sqrt (- x 1.0)) (sqrt x)) (* (sqrt (- x 1.0)) (sqrt x))) (* (sqrt (- x 1.0)) (sqrt x)))
  (* (- x 1.0) x)
  (sqrt (* (sqrt (- x 1.0)) (sqrt x)))
  (sqrt (* (sqrt (- x 1.0)) (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (- x 1.0)) (* (cbrt (sqrt x)) (cbrt (sqrt x))))
  (* (sqrt (- x 1.0)) (sqrt (* (cbrt x) (cbrt x))))
  (* (sqrt (- x 1.0)) (sqrt (sqrt x)))
  (* (sqrt (- x 1.0)) (sqrt 1))
  (* (sqrt (- x 1.0)) (sqrt (sqrt x)))
  (* (sqrt (- x 1.0)) 1)
  (* (cbrt (sqrt (- x 1.0))) (sqrt x))
  (* (sqrt (cbrt (- x 1.0))) (sqrt x))
  (* (sqrt (sqrt (- x 1.0))) (sqrt x))
  (* (sqrt (- x 1.0)) (sqrt x))
  (* (sqrt (- (sqrt x) (sqrt 1.0))) (sqrt x))
  (* (sqrt (- x 1.0)) (sqrt x))
  (* (sqrt (sqrt (- x 1.0))) (sqrt x))
  (* (sqrt (- x 1.0)) (sqrt x))
  (* (sqrt (- (pow x 3) (pow 1.0 3))) (sqrt x))
  (* (sqrt (- (* x x) (* 1.0 1.0))) (sqrt x))
  (- (+ (* +nan.0 (pow x 2)) (- (+ (* +nan.0 (pow x 3)) (- (* +nan.0 x))))))
  (- x (+ 0.5 (* 0.125 (/ 1 x))))
  (- (+ (* +nan.0 (/ 1 (pow x 2))) (- (+ (* +nan.0 (/ 1 x)) (- +nan.0)))))
0.406 * * [simplify]: iteration  0 :  83  enodes  (cost  387 )
0.421 * * [simplify]: iteration  1 :  182  enodes  (cost  354 )
0.459 * * [simplify]: iteration  2 :  497  enodes  (cost  338 )
0.702 * * [simplify]: iteration  3 :  1803  enodes  (cost  335 )
1.562 * * [simplify]: iteration  done :  5001  enodes  (cost  334 )
1.563 * [simplify]: Simplified to:
   (* x (- x 1.0))
  (* (sqrt (- x 1.0)) (sqrt x))
  (* x (- x 1.0))
  (log (* (sqrt (- x 1.0)) (sqrt x)))
  (log (* (sqrt (- x 1.0)) (sqrt x)))
  (exp (* (sqrt (- x 1.0)) (sqrt x)))
  (pow (* (sqrt (- x 1.0)) (sqrt x)) 3)
  (* (cbrt (* (sqrt (- x 1.0)) (sqrt x))) (cbrt (* (sqrt (- x 1.0)) (sqrt x))))
  (cbrt (* (sqrt (- x 1.0)) (sqrt x)))
  (pow (* (sqrt (- x 1.0)) (sqrt x)) 3)
  (* x (- x 1.0))
  (sqrt (* (sqrt (- x 1.0)) (sqrt x)))
  (sqrt (* (sqrt (- x 1.0)) (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (sqrt (- x 1.0))) (sqrt (sqrt x)))
  (* (sqrt (- x 1.0)) (* (cbrt (sqrt x)) (cbrt (sqrt x))))
  (* (sqrt (- x 1.0)) (fabs (cbrt x)))
  (* (sqrt (- x 1.0)) (sqrt (sqrt x)))
  (sqrt (- x 1.0))
  (* (sqrt (- x 1.0)) (sqrt (sqrt x)))
  (sqrt (- x 1.0))
  (* (cbrt (sqrt (- x 1.0))) (sqrt x))
  (* (sqrt (cbrt (- x 1.0))) (sqrt x))
  (* (sqrt (sqrt (- x 1.0))) (sqrt x))
  (* (sqrt (- x 1.0)) (sqrt x))
  (* (sqrt (- (sqrt x) (sqrt 1.0))) (sqrt x))
  (* (sqrt (- x 1.0)) (sqrt x))
  (* (sqrt (sqrt (- x 1.0))) (sqrt x))
  (* (sqrt (- x 1.0)) (sqrt x))
  (* (sqrt (- (pow x 3) (pow 1.0 3))) (sqrt x))
  (* (sqrt (- (* x x) (* 1.0 1.0))) (sqrt x))
  (* +nan.0 (- (- (pow x 3) x) (* x x)))
  (- x (+ 0.5 (/ 0.125 x)))
  (- (- (/ +nan.0 x) +nan.0) (/ +nan.0 (* x x)))
1.563 * * * [progress]: adding candidates to table
1.630 * * [progress]: iteration 2 / 4
1.630 * * * [progress]: picking best candidate
1.631 * * * * [pick]: Picked  #<alt (λ (x) (- x (+ 0.5 (/ 0.125 x))))>
1.631 * * * [progress]: localizing error
1.635 * * * [progress]: generating rewritten candidates
1.635 * * * [progress]: generating series expansions
1.635 * * * [progress]: simplifying candidates
1.636 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   
1.636 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
1.637 * * [simplify]: iteration  done :  0  enodes  (cost  0 )
1.637 * [simplify]: Simplified to:
   
1.637 * * * [progress]: adding candidates to table
1.637 * [progress]: [Phase 3 of 3] Extracting.
1.637 * * [regime]: Finding splitpoints for: (#<alt (λ (x) (* (sqrt (- x 1.0)) (sqrt x)))> #<alt (λ (x) (- x (+ 0.5 (/ 0.125 x))))>)
1.638 * * * [regime-changes]: Trying 2 branch expressions: ((* (sqrt (- x 1.0)) (sqrt x)) x)
1.639 * * * * [regimes]: Trying to branch on (* (sqrt (- x 1.0)) (sqrt x)) from (#<alt (λ (x) (* (sqrt (- x 1.0)) (sqrt x)))> #<alt (λ (x) (- x (+ 0.5 (/ 0.125 x))))>)
1.660 * * * * [regimes]: Trying to branch on x from (#<alt (λ (x) (* (sqrt (- x 1.0)) (sqrt x)))> #<alt (λ (x) (- x (+ 0.5 (/ 0.125 x))))>)
1.669 * * * [regime]: Found split indices: #<option (#s(si 1 255))>
1.670 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- x (+ 0.5 (/ 0.125 x)))
1.670 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
1.670 * * [simplify]: iteration  1 :  7  enodes  (cost  7 )
1.670 * * [simplify]: iteration  done :  7  enodes  (cost  7 )
1.670 * [simplify]: Simplified to:
   (- x (+ 0.5 (/ 0.125 x)))
2.774 * [regime-testing]: Baseline error score: 0.39300144971517914
2.775 * [regime-testing]: Oracle error score: 0.006073879547533586
2.776 * [regime-testing]: End program error score: 0.39300144971517914