Error in 10.3s

Runtime

Time bar (total: 10.3s)Debug log

start139.0ms

Algorithm
intervals

setup26.0ms

Pruning

1 alts after pruning (1 fresh and 0 done)

Merged error: 27.8b

localize14.0ms

Local error

Found 3 expressions with local error:

3.2b
(- (/ 2 (+ 1 (exp (* -2 x)))) 1)
0.0b
(/ 2 (+ 1 (exp (* -2 x))))
0.0b
(+ 1 (exp (* -2 x)))

rewrite6.0ms

Algorithm
rewrite-expression-head
Counts
3 → 37
Calls

3 calls. Slowest were:

4.0ms
(- (/ 2 (+ 1 (exp (* -2 x)))) 1)
1.0ms
(+ 1 (exp (* -2 x)))
1.0ms
(/ 2 (+ 1 (exp (* -2 x))))

series72.0ms

Counts
3 → 9
Calls

3 calls. Slowest were:

48.0ms
(- (/ 2 (+ 1 (exp (* -2 x)))) 1)
17.0ms
(/ 2 (+ 1 (exp (* -2 x))))
7.0ms
(+ 1 (exp (* -2 x)))

simplify434.0ms

Counts
15 → 46
Calls

15 calls. Slowest were:

170.0ms
(- (+ (* 2 (pow x 2)) 2) (* 2 x))
66.0ms
(- (+ x (* 2/15 (pow x 5))) (* 1/3 (pow x 3)))
65.0ms
(+ (* 1 1) (- (* (exp (* -2 x)) (exp (* -2 x))) (* 1 (exp (* -2 x)))))

prune549.0ms

Pruning

2 alts after pruning (2 fresh and 0 done)

Merged error: 0b

localize1.0ms

Local error

Found 3 expressions with local error:

3.2b
(- (/ 2 (+ 1 (exp (* -2 x)))) 1)
0.0b
(/ 2 (+ 1 (exp (* -2 x))))
0.0b
(+ 1 (exp (* -2 x)))

rewrite6.0ms

Algorithm
rewrite-expression-head
Counts
3 → 37
Calls

3 calls. Slowest were:

4.0ms
(- (/ 2 (+ 1 (exp (* -2 x)))) 1)
1.0ms
(+ 1 (exp (* -2 x)))
1.0ms
(/ 2 (+ 1 (exp (* -2 x))))

series85.0ms

Counts
3 → 9
Calls

3 calls. Slowest were:

51.0ms
(- (/ 2 (+ 1 (exp (* -2 x)))) 1)
23.0ms
(/ 2 (+ 1 (exp (* -2 x))))
11.0ms
(+ 1 (exp (* -2 x)))

simplify565.0ms

Counts
15 → 46
Calls

15 calls. Slowest were:

244.0ms
(- (+ (* 2 (pow x 2)) 2) (* 2 x))
68.0ms
(- (+ x (* 2/15 (pow x 5))) (* 1/3 (pow x 3)))
68.0ms
(+ (* 1 1) (- (* (exp (* -2 x)) (exp (* -2 x))) (* 1 (exp (* -2 x)))))

prune493.0ms

Pruning

2 alts after pruning (1 fresh and 1 done)

Merged error: 0b

localize36.0ms

Local error

Found 4 expressions with local error:

18.3b
(- (+ x (* 2/15 (pow x 5))) (* 1/3 (pow x 3)))
0.2b
(* 1/3 (pow x 3))
0.1b
(* 2/15 (pow x 5))
0.0b
(+ x (* 2/15 (pow x 5)))

rewrite14.0ms

Algorithm
rewrite-expression-head
Counts
4 → 47
Calls

4 calls. Slowest were:

9.0ms
(- (+ x (* 2/15 (pow x 5))) (* 1/3 (pow x 3)))
2.0ms
(* 1/3 (pow x 3))
1.0ms
(* 2/15 (pow x 5))

series151.0ms

Counts
4 → 12
Calls

4 calls. Slowest were:

79.0ms
(+ x (* 2/15 (pow x 5)))
29.0ms
(- (+ x (* 2/15 (pow x 5))) (* 1/3 (pow x 3)))
27.0ms
(* 2/15 (pow x 5))

simplify402.0ms

Counts
20 → 59
Calls

20 calls. Slowest were:

143.0ms
(/ (exp (+ x (* 2/15 (pow x 5)))) (exp (* 1/3 (pow x 3))))
93.0ms
(- (+ x (* 2/15 (pow x 5))) (* 1/3 (pow x 3)))
64.0ms
(- (+ x (* 2/15 (pow x 5))) (* 1/3 (pow x 3)))

prune703.0ms

Pruning

2 alts after pruning (0 fresh and 2 done)

Merged error: 0b

regimes319.0ms

Please include this information when filing a bug report:

herbie shell --seed 2018359 
(FPCore (x y)
  :name "Logistic function from Lakshay Garg"
  (- (/ 2 (+ 1 (exp (* -2 x)))) 1))

Backtrace

partition: contract violation expected: list? given: 0.011905008080251337 argument position: 2nd other arguments...: #<procedure:ordinary-value?>LC
partition/home/p92/racket/collects/racket/list.rkt5550
errors-score/data/pavpan/nightlies/herbie/develop/src/points.rkt3220
for-loop/data/pavpan/nightlies/herbie/develop/src/sandbox.rkt7512
(unnamed)/home/p92/racket/collects/racket/private/more-scheme.rkt26128
run/home/p92/racket/share/pkgs/profile-lib/main.rkt392
profile-thunk16/home/p92/racket/share/pkgs/profile-lib/main.rkt90
(unnamed)/home/p92/racket/collects/racket/private/more-scheme.rkt26128