24.318 * [progress]: [Phase 1 of 3] Setting up.
0.002 * * * [progress]: [1/2] Preparing points
0.116 * * * [progress]: [2/2] Setting up program.
0.119 * [progress]: [Phase 2 of 3] Improving.
0.119 * * * * [progress]: [ 1 / 1 ] simplifiying candidate #<alt (λ (x y) (- (log (+ 1 (exp x))) (* x y)))>
0.119 * [simplify]: Simplifying:
  (- (log (+ 1 (exp x))) (* x y))
0.119 * * [simplify]: iteration 0: 8 enodes
0.121 * * [simplify]: iteration 1: 15 enodes
0.123 * * [simplify]: iteration 2: 22 enodes
0.126 * * [simplify]: iteration 3: 26 enodes
0.129 * * [simplify]: iteration complete: 26 enodes
0.129 * * [simplify]: Extracting #0: cost 1 inf + 0
0.129 * * [simplify]: Extracting #1: cost 8 inf + 0
0.129 * * [simplify]: Extracting #2: cost 5 inf + 167
0.129 * * [simplify]: Extracting #3: cost 4 inf + 279
0.129 * * [simplify]: Extracting #4: cost 1 inf + 683
0.129 * * [simplify]: Extracting #5: cost 0 inf + 795
0.129 * [simplify]: Simplified to:
  (- (log1p (exp x)) (* y x))
0.133 * * [progress]: iteration 1 / 4
0.133 * * * [progress]: picking best candidate
0.138 * * * * [pick]: Picked  #<alt (λ (x y) (- (log1p (exp x)) (* y x)))>
0.138 * * * [progress]: localizing error
0.160 * * * [progress]: generating rewritten candidates
0.160 * * * * [progress]: [ 1 / 1 ] rewriting at (2 1)
0.161 * * * [progress]: generating series expansions
0.161 * * * * [progress]: [ 1 / 1 ] generating series at (2 1)
0.162 * [backup-simplify]: Simplify (log1p (exp x)) into (log1p (exp x))
0.162 * [approximate]: Taking taylor expansion of (log1p (exp x)) in (x) around 0
0.162 * [taylor]: Taking taylor expansion of (log1p (exp x)) in x
0.162 * [taylor]: Rewrote expression to (log (+ 1 (exp x)))
0.162 * [taylor]: Taking taylor expansion of (+ 1 (exp x)) in x
0.162 * [taylor]: Taking taylor expansion of 1 in x
0.162 * [backup-simplify]: Simplify 1 into 1
0.162 * [taylor]: Taking taylor expansion of (exp x) in x
0.162 * [taylor]: Taking taylor expansion of x in x
0.162 * [backup-simplify]: Simplify 0 into 0
0.162 * [backup-simplify]: Simplify 1 into 1
0.162 * [backup-simplify]: Simplify (exp 0) into 1
0.163 * [backup-simplify]: Simplify (+ 1 1) into 2
0.163 * [backup-simplify]: Simplify (log 2) into (log 2)
0.163 * [taylor]: Taking taylor expansion of (log1p (exp x)) in x
0.163 * [taylor]: Rewrote expression to (log (+ 1 (exp x)))
0.163 * [taylor]: Taking taylor expansion of (+ 1 (exp x)) in x
0.163 * [taylor]: Taking taylor expansion of 1 in x
0.163 * [backup-simplify]: Simplify 1 into 1
0.164 * [taylor]: Taking taylor expansion of (exp x) in x
0.164 * [taylor]: Taking taylor expansion of x in x
0.164 * [backup-simplify]: Simplify 0 into 0
0.164 * [backup-simplify]: Simplify 1 into 1
0.164 * [backup-simplify]: Simplify (exp 0) into 1
0.164 * [backup-simplify]: Simplify (+ 1 1) into 2
0.165 * [backup-simplify]: Simplify (log 2) into (log 2)
0.165 * [backup-simplify]: Simplify (log 2) into (log 2)
0.166 * [backup-simplify]: Simplify (* (exp 0) (+ (* (/ (pow 1 1) 1)))) into 1
0.167 * [backup-simplify]: Simplify (+ 0 1) into 1
0.168 * [backup-simplify]: Simplify (/ (+ (* 1 (/ (* (pow (* 1 1) 1)) (pow 2 1)))) 1) into 1/2
0.168 * [backup-simplify]: Simplify 1/2 into 1/2
0.170 * [backup-simplify]: Simplify (* (exp 0) (+ (* (/ (pow 1 2) 2)) (* (/ (pow 0 1) 1)))) into 1/2
0.170 * [backup-simplify]: Simplify (+ 0 1/2) into 1/2
0.174 * [backup-simplify]: Simplify (/ (+ (* -1 (/ (* (pow (* 1 1) 2)) (pow 2 2))) (* 1 (/ (* 1 (pow (* 2 1/2) 1)) (pow 2 1)))) 2) into 1/8
0.174 * [backup-simplify]: Simplify 1/8 into 1/8
0.174 * [backup-simplify]: Simplify (+ (* 1/8 (pow x 2)) (+ (* 1/2 x) (log 2))) into (+ (log 2) (+ (* 1/2 x) (* 1/8 (pow x 2))))
0.175 * [backup-simplify]: Simplify (log1p (exp (/ 1 x))) into (log1p (exp (/ 1 x)))
0.175 * [approximate]: Taking taylor expansion of (log1p (exp (/ 1 x))) in (x) around 0
0.175 * [taylor]: Taking taylor expansion of (log1p (exp (/ 1 x))) in x
0.175 * [taylor]: Rewrote expression to (log (+ 1 (exp (/ 1 x))))
0.175 * [taylor]: Taking taylor expansion of (+ 1 (exp (/ 1 x))) in x
0.175 * [taylor]: Taking taylor expansion of 1 in x
0.175 * [backup-simplify]: Simplify 1 into 1
0.175 * [taylor]: Taking taylor expansion of (exp (/ 1 x)) in x
0.175 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.175 * [taylor]: Taking taylor expansion of x in x
0.175 * [backup-simplify]: Simplify 0 into 0
0.175 * [backup-simplify]: Simplify 1 into 1
0.175 * [backup-simplify]: Simplify (/ 1 1) into 1
0.176 * [backup-simplify]: Simplify (exp (/ 1 x)) into (exp (/ 1 x))
0.176 * [backup-simplify]: Simplify (+ 1 (exp (/ 1 x))) into (+ (exp (/ 1 x)) 1)
0.176 * [backup-simplify]: Simplify (log (+ (exp (/ 1 x)) 1)) into (log (+ (exp (/ 1 x)) 1))
0.176 * [taylor]: Taking taylor expansion of (log1p (exp (/ 1 x))) in x
0.176 * [taylor]: Rewrote expression to (log (+ 1 (exp (/ 1 x))))
0.176 * [taylor]: Taking taylor expansion of (+ 1 (exp (/ 1 x))) in x
0.176 * [taylor]: Taking taylor expansion of 1 in x
0.176 * [backup-simplify]: Simplify 1 into 1
0.176 * [taylor]: Taking taylor expansion of (exp (/ 1 x)) in x
0.176 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.176 * [taylor]: Taking taylor expansion of x in x
0.176 * [backup-simplify]: Simplify 0 into 0
0.176 * [backup-simplify]: Simplify 1 into 1
0.202 * [backup-simplify]: Simplify (/ 1 1) into 1
0.202 * [backup-simplify]: Simplify (exp (/ 1 x)) into (exp (/ 1 x))
0.202 * [backup-simplify]: Simplify (+ 1 (exp (/ 1 x))) into (+ (exp (/ 1 x)) 1)
0.202 * [backup-simplify]: Simplify (log (+ (exp (/ 1 x)) 1)) into (log (+ (exp (/ 1 x)) 1))
0.203 * [backup-simplify]: Simplify (log (+ (exp (/ 1 x)) 1)) into (log (+ (exp (/ 1 x)) 1))
0.203 * [backup-simplify]: Simplify (+ 0 0) into 0
0.204 * [backup-simplify]: Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (+ (exp (/ 1 x)) 1) 1)))) 1) into 0
0.204 * [backup-simplify]: Simplify 0 into 0
0.205 * [backup-simplify]: Simplify (+ 0 0) into 0
0.207 * [backup-simplify]: Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (+ (exp (/ 1 x)) 1) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (+ (exp (/ 1 x)) 1) 1)))) 2) into 0
0.207 * [backup-simplify]: Simplify 0 into 0
0.207 * [backup-simplify]: Simplify (+ 0 0) into 0
0.210 * [backup-simplify]: Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (+ (exp (/ 1 x)) 1) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (+ (exp (/ 1 x)) 1) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (+ (exp (/ 1 x)) 1) 1)))) 6) into 0
0.210 * [backup-simplify]: Simplify 0 into 0
0.211 * [backup-simplify]: Simplify (+ 0 0) into 0
0.217 * [backup-simplify]: Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (+ (exp (/ 1 x)) 1) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (+ (exp (/ 1 x)) 1) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (+ (exp (/ 1 x)) 1) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (+ (exp (/ 1 x)) 1) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (+ (exp (/ 1 x)) 1) 1)))) 24) into 0
0.218 * [backup-simplify]: Simplify 0 into 0
0.218 * [backup-simplify]: Simplify (+ 0 0) into 0
0.227 * [backup-simplify]: Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (+ (exp (/ 1 x)) 1) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (+ (exp (/ 1 x)) 1) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (+ (exp (/ 1 x)) 1) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (+ (exp (/ 1 x)) 1) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (+ (exp (/ 1 x)) 1) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (+ (exp (/ 1 x)) 1) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (+ (exp (/ 1 x)) 1) 1)))) 120) into 0
0.227 * [backup-simplify]: Simplify 0 into 0
0.227 * [backup-simplify]: Simplify (+ 0 0) into 0
0.240 * [backup-simplify]: Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (+ (exp (/ 1 x)) 1) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (+ (exp (/ 1 x)) 1) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (+ (exp (/ 1 x)) 1) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (+ (exp (/ 1 x)) 1) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (+ (exp (/ 1 x)) 1) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (+ (exp (/ 1 x)) 1) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (+ (exp (/ 1 x)) 1) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (+ (exp (/ 1 x)) 1) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (+ (exp (/ 1 x)) 1) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (+ (exp (/ 1 x)) 1) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (+ (exp (/ 1 x)) 1) 1)))) 720) into 0
0.240 * [backup-simplify]: Simplify 0 into 0
0.240 * [backup-simplify]: Simplify (log (+ (exp (/ 1 (/ 1 x))) 1)) into (log (+ (exp x) 1))
0.241 * [backup-simplify]: Simplify (log1p (exp (/ 1 (- x)))) into (log1p (exp (/ -1 x)))
0.241 * [approximate]: Taking taylor expansion of (log1p (exp (/ -1 x))) in (x) around 0
0.241 * [taylor]: Taking taylor expansion of (log1p (exp (/ -1 x))) in x
0.241 * [taylor]: Rewrote expression to (log (+ 1 (exp (/ -1 x))))
0.241 * [taylor]: Taking taylor expansion of (+ 1 (exp (/ -1 x))) in x
0.241 * [taylor]: Taking taylor expansion of 1 in x
0.241 * [backup-simplify]: Simplify 1 into 1
0.241 * [taylor]: Taking taylor expansion of (exp (/ -1 x)) in x
0.241 * [taylor]: Taking taylor expansion of (/ -1 x) in x
0.241 * [taylor]: Taking taylor expansion of -1 in x
0.241 * [backup-simplify]: Simplify -1 into -1
0.241 * [taylor]: Taking taylor expansion of x in x
0.241 * [backup-simplify]: Simplify 0 into 0
0.241 * [backup-simplify]: Simplify 1 into 1
0.241 * [backup-simplify]: Simplify (/ -1 1) into -1
0.242 * [backup-simplify]: Simplify (exp (/ -1 x)) into (exp (/ -1 x))
0.242 * [backup-simplify]: Simplify (+ 1 (exp (/ -1 x))) into (+ (exp (/ -1 x)) 1)
0.242 * [backup-simplify]: Simplify (log (+ (exp (/ -1 x)) 1)) into (log (+ (exp (/ -1 x)) 1))
0.242 * [taylor]: Taking taylor expansion of (log1p (exp (/ -1 x))) in x
0.242 * [taylor]: Rewrote expression to (log (+ 1 (exp (/ -1 x))))
0.242 * [taylor]: Taking taylor expansion of (+ 1 (exp (/ -1 x))) in x
0.242 * [taylor]: Taking taylor expansion of 1 in x
0.242 * [backup-simplify]: Simplify 1 into 1
0.242 * [taylor]: Taking taylor expansion of (exp (/ -1 x)) in x
0.242 * [taylor]: Taking taylor expansion of (/ -1 x) in x
0.242 * [taylor]: Taking taylor expansion of -1 in x
0.242 * [backup-simplify]: Simplify -1 into -1
0.242 * [taylor]: Taking taylor expansion of x in x
0.242 * [backup-simplify]: Simplify 0 into 0
0.242 * [backup-simplify]: Simplify 1 into 1
0.243 * [backup-simplify]: Simplify (/ -1 1) into -1
0.243 * [backup-simplify]: Simplify (exp (/ -1 x)) into (exp (/ -1 x))
0.243 * [backup-simplify]: Simplify (+ 1 (exp (/ -1 x))) into (+ (exp (/ -1 x)) 1)
0.243 * [backup-simplify]: Simplify (log (+ (exp (/ -1 x)) 1)) into (log (+ (exp (/ -1 x)) 1))
0.243 * [backup-simplify]: Simplify (log (+ (exp (/ -1 x)) 1)) into (log (+ (exp (/ -1 x)) 1))
0.243 * [backup-simplify]: Simplify (+ 0 0) into 0
0.244 * [backup-simplify]: Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (+ (exp (/ -1 x)) 1) 1)))) 1) into 0
0.244 * [backup-simplify]: Simplify 0 into 0
0.245 * [backup-simplify]: Simplify (+ 0 0) into 0
0.246 * [backup-simplify]: Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (+ (exp (/ -1 x)) 1) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (+ (exp (/ -1 x)) 1) 1)))) 2) into 0
0.247 * [backup-simplify]: Simplify 0 into 0
0.247 * [backup-simplify]: Simplify (+ 0 0) into 0
0.250 * [backup-simplify]: Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (+ (exp (/ -1 x)) 1) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (+ (exp (/ -1 x)) 1) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (+ (exp (/ -1 x)) 1) 1)))) 6) into 0
0.250 * [backup-simplify]: Simplify 0 into 0
0.250 * [backup-simplify]: Simplify (+ 0 0) into 0
0.255 * [backup-simplify]: Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (+ (exp (/ -1 x)) 1) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (+ (exp (/ -1 x)) 1) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (+ (exp (/ -1 x)) 1) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (+ (exp (/ -1 x)) 1) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (+ (exp (/ -1 x)) 1) 1)))) 24) into 0
0.255 * [backup-simplify]: Simplify 0 into 0
0.256 * [backup-simplify]: Simplify (+ 0 0) into 0
0.264 * [backup-simplify]: Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (+ (exp (/ -1 x)) 1) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (+ (exp (/ -1 x)) 1) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (+ (exp (/ -1 x)) 1) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (+ (exp (/ -1 x)) 1) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (+ (exp (/ -1 x)) 1) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (+ (exp (/ -1 x)) 1) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (+ (exp (/ -1 x)) 1) 1)))) 120) into 0
0.264 * [backup-simplify]: Simplify 0 into 0
0.264 * [backup-simplify]: Simplify (+ 0 0) into 0
0.274 * [backup-simplify]: Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (+ (exp (/ -1 x)) 1) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (+ (exp (/ -1 x)) 1) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (+ (exp (/ -1 x)) 1) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (+ (exp (/ -1 x)) 1) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (+ (exp (/ -1 x)) 1) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (+ (exp (/ -1 x)) 1) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (+ (exp (/ -1 x)) 1) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (+ (exp (/ -1 x)) 1) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (+ (exp (/ -1 x)) 1) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (+ (exp (/ -1 x)) 1) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (+ (exp (/ -1 x)) 1) 1)))) 720) into 0
0.274 * [backup-simplify]: Simplify 0 into 0
0.275 * [backup-simplify]: Simplify (log (+ (exp (/ -1 (/ 1 (- x)))) 1)) into (log (+ (exp x) 1))
0.275 * * * [progress]: simplifying candidates
0.275 * * * * [progress]: [ 1 / 15 ] simplifiying candidate #<alt (λ (x y) (- (log (+ 1 (exp x))) (* y x)))>
0.275 * * * * [progress]: [ 2 / 15 ] simplifiying candidate #<alt (λ (x y) (- (log1p (expm1 (log1p (exp x)))) (* y x)))>
0.275 * * * * [progress]: [ 3 / 15 ] simplifiying candidate #<alt (λ (x y) (- (expm1 (log1p (log1p (exp x)))) (* y x)))>
0.275 * * * * [progress]: [ 4 / 15 ] simplifiying candidate #<alt (λ (x y) (- (log1p (exp x)) (* y x)))>
0.275 * * * * [progress]: [ 5 / 15 ] simplifiying candidate #<alt (λ (x y) (- (pow (log1p (exp x)) 1) (* y x)))>
0.275 * * * * [progress]: [ 6 / 15 ] simplifiying candidate #<alt (λ (x y) (- (exp (log (log1p (exp x)))) (* y x)))>
0.275 * * * * [progress]: [ 7 / 15 ] simplifiying candidate #<alt (λ (x y) (- (log (exp (log1p (exp x)))) (* y x)))>
0.275 * * * * [progress]: [ 8 / 15 ] simplifiying candidate #<alt (λ (x y) (- (* (* (cbrt (log1p (exp x))) (cbrt (log1p (exp x)))) (cbrt (log1p (exp x)))) (* y x)))>
0.275 * * * * [progress]: [ 9 / 15 ] simplifiying candidate #<alt (λ (x y) (- (cbrt (* (* (log1p (exp x)) (log1p (exp x))) (log1p (exp x)))) (* y x)))>
0.275 * * * * [progress]: [ 10 / 15 ] simplifiying candidate #<alt (λ (x y) (- (* (sqrt (log1p (exp x))) (sqrt (log1p (exp x)))) (* y x)))>
0.275 * * * * [progress]: [ 11 / 15 ] simplifiying candidate #<alt (λ (x y) (- (* 1 (log1p (exp x))) (* y x)))>
0.275 * * * * [progress]: [ 12 / 15 ] simplifiying candidate #<alt (λ (x y) (- (posit16->real (real->posit16 (log1p (exp x)))) (* y x)))>
0.275 * * * * [progress]: [ 13 / 15 ] simplifiying candidate #<alt (λ (x y) (- (+ (log 2) (+ (* 1/2 x) (* 1/8 (pow x 2)))) (* y x)))>
0.275 * * * * [progress]: [ 14 / 15 ] simplifiying candidate #<alt (λ (x y) (- (log (+ (exp x) 1)) (* y x)))>
0.275 * * * * [progress]: [ 15 / 15 ] simplifiying candidate #<alt (λ (x y) (- (log (+ (exp x) 1)) (* y x)))>
0.275 * [simplify]: Simplifying:
  (+ 1 (exp x))
  (expm1 (log1p (exp x)))
  (log1p (log1p (exp x)))
  (log (log1p (exp x)))
  (exp (log1p (exp x)))
  (* (cbrt (log1p (exp x))) (cbrt (log1p (exp x))))
  (cbrt (log1p (exp x)))
  (* (* (log1p (exp x)) (log1p (exp x))) (log1p (exp x)))
  (sqrt (log1p (exp x)))
  (sqrt (log1p (exp x)))
  (real->posit16 (log1p (exp x)))
  (+ (log 2) (+ (* 1/2 x) (* 1/8 (pow x 2))))
  (log (+ (exp x) 1))
  (log (+ (exp x) 1))
0.276 * * [simplify]: iteration 0: 26 enodes
0.281 * * [simplify]: iteration 1: 42 enodes
0.290 * * [simplify]: iteration 2: 65 enodes
0.302 * * [simplify]: iteration 3: 120 enodes
0.348 * * [simplify]: iteration 4: 205 enodes
0.418 * * [simplify]: iteration 5: 478 enodes
0.583 * * [simplify]: iteration 6: 1002 enodes
1.950 * * [simplify]: iteration 7: 2164 enodes
4.984 * * [simplify]: iteration 8: 4695 enodes
5.397 * * [simplify]: iteration complete: 5000 enodes
5.397 * * [simplify]: Extracting #0: cost 11 inf + 0
5.397 * * [simplify]: Extracting #1: cost 99 inf + 0
5.399 * * [simplify]: Extracting #2: cost 403 inf + 1211
5.406 * * [simplify]: Extracting #3: cost 114 inf + 25926
5.416 * * [simplify]: Extracting #4: cost 27 inf + 51304
5.439 * * [simplify]: Extracting #5: cost 1 inf + 72592
5.460 * * [simplify]: Extracting #6: cost 0 inf + 72924
5.476 * [simplify]: Simplified to:
  (+ (exp x) 1)
  (exp x)
  (log1p (log1p (exp x)))
  (log (log1p (exp x)))
  (+ (exp x) 1)
  (* (cbrt (log1p (exp x))) (cbrt (log1p (exp x))))
  (cbrt (log1p (exp x)))
  (* (log1p (exp x)) (* (log1p (exp x)) (log1p (exp x))))
  (sqrt (log1p (exp x)))
  (sqrt (log1p (exp x)))
  (real->posit16 (log1p (exp x)))
  (fma (fma 1/8 x 1/2) x (log 2))
  (log1p (exp x))
  (log1p (exp x))
5.476 * * * [progress]: adding candidates to table
5.550 * [progress]: [Phase 3 of 3] Extracting.
5.553 * [simplify]: Simplifying:
  (- (log1p (exp x)) (* y x))
5.553 * * [simplify]: iteration 0: 6 enodes
5.553 * * [simplify]: iteration 1: 7 enodes
5.553 * * [simplify]: iteration complete: 7 enodes
5.553 * * [simplify]: Extracting #0: cost 1 inf + 0
5.553 * * [simplify]: Extracting #1: cost 3 inf + 0
5.553 * * [simplify]: Extracting #2: cost 6 inf + 0
5.554 * * [simplify]: Extracting #3: cost 4 inf + 2
5.554 * * [simplify]: Extracting #4: cost 0 inf + 518
5.554 * [simplify]: Simplified to:
  (- (log1p (exp x)) (* y x))
9.141 * [regime-testing]: Baseline error score: 0.3944320654005908
9.144 * [regime-testing]: Oracle error score: 0.3944320654005908
9.145 * [regime-testing]: End program error score: 0.3944320654005908
9.217 * [regime-testing]: Target error score: 0.0908994133473962