1.019 * [progress]: [Phase 1 of 3] Setting up. 0.001 * * * [progress]: [1/2] Preparing points 0.058 * * * [progress]: [2/2] Setting up program. 0.062 * [progress]: [Phase 2 of 3] Improving. 0.062 * [simplify]: Simplifying: (- (/ 1.0 (sqrt x)) (/ 1.0 (sqrt (+ x 1.0)))) 0.062 * * [simplify]: Extracting # 0 : cost 0 0.062 * * [simplify]: Extracting # 1 : cost 0 0.062 * * [simplify]: Extracting # 2 : cost 0 0.062 * * [simplify]: Extracting # 3 : cost 0 0.062 * * [simplify]: Extracting # 4 : cost 0 0.062 * * [simplify]: Extracting # 5 : cost 0 0.063 * * [simplify]: iteration 0 : 8 enodes (cost 11 ) 0.065 * * [simplify]: Extracting # 0 : cost 0 0.065 * * [simplify]: Extracting # 1 : cost 0 0.065 * * [simplify]: Extracting # 2 : cost 0 0.065 * * [simplify]: iteration 1 : 11 enodes (cost 11 ) 0.069 * * [simplify]: Extracting # 0 : cost 0 0.069 * * [simplify]: Extracting # 1 : cost 0 0.069 * * [simplify]: Extracting # 2 : cost 0 0.069 * * [simplify]: iteration 2 : 14 enodes (cost 11 ) 0.073 * * [simplify]: Extracting # 0 : cost 0 0.073 * * [simplify]: iteration done: 14 enodes (cost 11 ) 0.073 * [simplify]: Simplified to: (- (/ 1.0 (sqrt x)) (/ 1.0 (sqrt (+ x 1.0)))) 0.074 * * [progress]: iteration 1 / 4 0.074 * * * [progress]: picking best candidate 0.077 * * * * [pick]: Picked # 0.077 * * * [progress]: localizing error 0.115 * * * [progress]: generating rewritten candidates 0.115 * * * * [progress]: [ 1 / 3 ] rewriting at (2) 0.240 * * * * [progress]: [ 2 / 3 ] rewriting at (2 1) 0.246 * * * * [progress]: [ 3 / 3 ] rewriting at (2 2) 0.402 * * * [progress]: generating series expansions 0.402 * * * * [progress]: [ 1 / 3 ] generating series at (2) 0.402 * [backup-simplify]: Simplify (- (/ 1.0 (sqrt x)) (/ 1.0 (sqrt (+ x 1.0)))) into (- (* 1.0 (sqrt (/ 1 x))) (* 1.0 (sqrt (/ 1 (+ x 1.0))))) 0.402 * [approximate]: Taking taylor expansion of (- (* 1.0 (sqrt (/ 1 x))) (* 1.0 (sqrt (/ 1 (+ x 1.0))))) in (x) around 0 0.402 * [taylor]: Taking taylor expansion of (- (* 1.0 (sqrt (/ 1 x))) (* 1.0 (sqrt (/ 1 (+ x 1.0))))) in x 0.402 * [taylor]: Taking taylor expansion of (* 1.0 (sqrt (/ 1 x))) in x 0.402 * [taylor]: Taking taylor expansion of 1.0 in x 0.402 * [backup-simplify]: Simplify 1.0 into 1.0 0.402 * [taylor]: Taking taylor expansion of (sqrt (/ 1 x)) in x 0.402 * [taylor]: Taking taylor expansion of (/ 1 x) in x 0.402 * [taylor]: Taking taylor expansion of x in x 0.402 * [backup-simplify]: Simplify 0 into 0 0.402 * [backup-simplify]: Simplify 1 into 1 0.403 * [backup-simplify]: Simplify (/ 1 1) into 1 0.403 * [backup-simplify]: Simplify (sqrt 0) into 0 0.404 * [backup-simplify]: Simplify (/ 1 (* 2 (sqrt 0))) into +nan.0 0.404 * [taylor]: Taking taylor expansion of (* 1.0 (sqrt (/ 1 (+ x 1.0)))) in x 0.404 * [taylor]: Taking taylor expansion of 1.0 in x 0.405 * [backup-simplify]: Simplify 1.0 into 1.0 0.405 * [taylor]: Taking taylor expansion of (sqrt (/ 1 (+ x 1.0))) in x 0.405 * [taylor]: Taking taylor expansion of (/ 1 (+ x 1.0)) in x 0.405 * [taylor]: Taking taylor expansion of (+ x 1.0) in x 0.405 * [taylor]: Taking taylor expansion of x in x 0.405 * [backup-simplify]: Simplify 0 into 0 0.405 * [backup-simplify]: Simplify 1 into 1 0.405 * [taylor]: Taking taylor expansion of 1.0 in x 0.405 * [backup-simplify]: Simplify 1.0 into 1.0 0.405 * [backup-simplify]: Simplify (+ 0 1.0) into 1.0 0.405 * [backup-simplify]: Simplify (/ 1 1.0) into 1.0 0.406 * [backup-simplify]: Simplify (sqrt 1.0) into (sqrt 1.0) 0.406 * [backup-simplify]: Simplify (+ 1 0) into 1 0.408 * [backup-simplify]: Simplify (- (+ (* 1.0 (/ 1 1.0)))) into (- 1.0) 0.410 * [backup-simplify]: Simplify (/ (- 1.0) (* 2 (sqrt 1.0))) into (/ -0.5 (sqrt 1.0)) 0.410 * [taylor]: Taking taylor expansion of (- (* 1.0 (sqrt (/ 1 x))) (* 1.0 (sqrt (/ 1 (+ x 1.0))))) in x 0.410 * [taylor]: Taking taylor expansion of (* 1.0 (sqrt (/ 1 x))) in x 0.410 * [taylor]: Taking taylor expansion of 1.0 in x 0.410 * [backup-simplify]: Simplify 1.0 into 1.0 0.411 * [taylor]: Taking taylor expansion of (sqrt (/ 1 x)) in x 0.411 * [taylor]: Taking taylor expansion of (/ 1 x) in x 0.411 * [taylor]: Taking taylor expansion of x in x 0.411 * [backup-simplify]: Simplify 0 into 0 0.411 * [backup-simplify]: Simplify 1 into 1 0.411 * [backup-simplify]: Simplify (/ 1 1) into 1 0.411 * [backup-simplify]: Simplify (sqrt 0) into 0 0.413 * [backup-simplify]: Simplify (/ 1 (* 2 (sqrt 0))) into +nan.0 0.413 * [taylor]: Taking taylor expansion of (* 1.0 (sqrt (/ 1 (+ x 1.0)))) in x 0.413 * [taylor]: Taking taylor expansion of 1.0 in x 0.413 * [backup-simplify]: Simplify 1.0 into 1.0 0.413 * [taylor]: Taking taylor expansion of (sqrt (/ 1 (+ x 1.0))) in x 0.413 * [taylor]: Taking taylor expansion of (/ 1 (+ x 1.0)) in x 0.413 * [taylor]: Taking taylor expansion of (+ x 1.0) in x 0.413 * [taylor]: Taking taylor expansion of x in x 0.413 * [backup-simplify]: Simplify 0 into 0 0.413 * [backup-simplify]: Simplify 1 into 1 0.413 * [taylor]: Taking taylor expansion of 1.0 in x 0.413 * [backup-simplify]: Simplify 1.0 into 1.0 0.414 * [backup-simplify]: Simplify (+ 0 1.0) into 1.0 0.414 * [backup-simplify]: Simplify (/ 1 1.0) into 1.0 0.415 * [backup-simplify]: Simplify (sqrt 1.0) into (sqrt 1.0) 0.415 * [backup-simplify]: Simplify (+ 1 0) into 1 0.418 * [backup-simplify]: Simplify (- (+ (* 1.0 (/ 1 1.0)))) into (- 1.0) 0.420 * [backup-simplify]: Simplify (/ (- 1.0) (* 2 (sqrt 1.0))) into (/ -0.5 (sqrt 1.0)) 0.420 * [backup-simplify]: Simplify (* 1.0 0) into 0 0.421 * [backup-simplify]: Simplify (+ 0 0) into 0 0.421 * [backup-simplify]: Simplify 0 into 0 0.422 * [backup-simplify]: Simplify (+ (* 1.0 +nan.0) (* 0 0)) into (- +nan.0) 0.423 * [backup-simplify]: Simplify (* 1.0 (sqrt 1.0)) into (* 1.0 (sqrt 1.0)) 0.425 * [backup-simplify]: Simplify (- (* 1.0 (sqrt 1.0))) into (- (* 1.0 (sqrt 1.0))) 0.427 * [backup-simplify]: Simplify (+ (- +nan.0) (- (* 1.0 (sqrt 1.0)))) into (- (+ (* 1.0 (sqrt 1.0)) (- +nan.0))) 0.430 * [backup-simplify]: Simplify (- (+ (* 1.0 (sqrt 1.0)) (- +nan.0))) into (- (+ (* 1.0 (sqrt 1.0)) (- +nan.0))) 0.432 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)))) into 0 0.435 * [backup-simplify]: Simplify (/ (- 0 (pow +nan.0 2) (+)) (* 2 0)) into +nan.0 0.437 * [backup-simplify]: Simplify (+ (* 1.0 +nan.0) (+ (* 0 +nan.0) (* 0 0))) into (- +nan.0) 0.440 * [backup-simplify]: Simplify (+ (* 1.0 (/ -0.5 (sqrt 1.0))) (* 0 (sqrt 1.0))) into (- (* 0.5 (/ 1 (sqrt 1.0)))) 0.444 * [backup-simplify]: Simplify (- (- (* 0.5 (/ 1 (sqrt 1.0))))) into (* 0.5 (/ 1 (sqrt 1.0))) 0.447 * [backup-simplify]: Simplify (+ (- +nan.0) (* 0.5 (/ 1 (sqrt 1.0)))) into (- (* 0.5 (/ 1 (sqrt 1.0))) +nan.0) 0.450 * [backup-simplify]: Simplify (- (* 0.5 (/ 1 (sqrt 1.0))) +nan.0) into (- (* 0.5 (/ 1 (sqrt 1.0))) +nan.0) 0.451 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0 0.455 * [backup-simplify]: Simplify (/ (- 0 (+ (* 2 (* +nan.0 +nan.0)))) (* 2 0)) into +nan.0 0.457 * [backup-simplify]: Simplify (+ (* 1.0 +nan.0) (+ (* 0 +nan.0) (+ (* 0 +nan.0) (* 0 0)))) into (- +nan.0) 0.458 * [backup-simplify]: Simplify (+ 0 0) into 0 0.460 * [backup-simplify]: Simplify (- (+ (* 1.0 (/ 0 1.0)) (* (- 1.0) (/ 1 1.0)))) into 1.0 0.463 * [backup-simplify]: Simplify (/ (- 1.0 (pow (/ -0.5 (sqrt 1.0)) 2) (+)) (* 2 (sqrt 1.0))) into (* 1/2 (/ (- 1.0 (* 0.25 (/ 1 (pow (sqrt 1.0) 2)))) (sqrt 1.0))) 0.470 * [backup-simplify]: Simplify (+ (* 1.0 (* 1/2 (/ (- 1.0 (* 0.25 (/ 1 (pow (sqrt 1.0) 2)))) (sqrt 1.0)))) (+ (* 0 (/ -0.5 (sqrt 1.0))) (* 0 (sqrt 1.0)))) into (- (* 0.5 (/ 1 (sqrt 1.0))) (* 0.125 (/ 1 (pow (sqrt 1.0) 3)))) 0.475 * [backup-simplify]: Simplify (- (- (* 0.5 (/ 1 (sqrt 1.0))) (* 0.125 (/ 1 (pow (sqrt 1.0) 3))))) into (- (* 0.125 (/ 1 (pow (sqrt 1.0) 3))) (* 0.5 (/ 1 (sqrt 1.0)))) 0.479 * [backup-simplify]: Simplify (+ (- +nan.0) (- (* 0.125 (/ 1 (pow (sqrt 1.0) 3))) (* 0.5 (/ 1 (sqrt 1.0))))) into (- (* 0.125 (/ 1 (pow (sqrt 1.0) 3))) (+ (* 0.5 (/ 1 (sqrt 1.0))) (- +nan.0))) 0.484 * [backup-simplify]: Simplify (- (* 0.125 (/ 1 (pow (sqrt 1.0) 3))) (+ (* 0.5 (/ 1 (sqrt 1.0))) (- +nan.0))) into (- (* 0.125 (/ 1 (pow (sqrt 1.0) 3))) (+ +nan.0 (* 0.5 (/ 1 (sqrt 1.0)))))