Error in 17.9s

Runtime

Time bar (total: 17.9s)Debug logProfile

start104.0ms

Algorithm
intervals

setup12.0ms

Pruning

1 alts after pruning (1 fresh and 0 done)

Merged error: 30.5b

localize12.0ms

Local error

Found 2 expressions with local error:

3.4b
(- (log (+ 1 N)) (log N))
1.3b
(log (+ 1 N))

rewrite6.0ms

Algorithm
rewrite-expression-head
Counts
2 → 34
Calls

2 calls. Slowest were:

4.0ms
(- (log (+ 1 N)) (log N))
1.0ms
(log (+ 1 N))

series102.0ms

Counts
2 → 6
Calls

2 calls. Slowest were:

73.0ms
(- (log (+ 1 N)) (log N))
29.0ms
(log (+ 1 N))

simplify993.0ms

Counts
22 → 40
Calls

22 calls. Slowest were:

304.0ms
(- (+ (/ 1 N) (log -1)) (+ (* 1/2 (/ 1 (pow N 2))) (log (/ -1 N))))
192.0ms
(- (/ 1 N) (+ (* 1/2 (/ 1 (pow N 2))) (log (/ 1 N))))
133.0ms
(- (+ (* 1/3 (/ 1 (pow N 3))) (/ 1 N)) (* 1/2 (/ 1 (pow N 2))))

prune346.0ms

Pruning

2 alts after pruning (2 fresh and 0 done)

Merged error: 0.0b

localize28.0ms

Local error

Found 4 expressions with local error:

0.4b
(/ 1 (* N N))
0.4b
(/ 1/3 N)
0.1b
(* (/ 1 (* N N)) (- 1/2 (/ 1/3 N)))
0.0b
(- (/ 1 N) (* (/ 1 (* N N)) (- 1/2 (/ 1/3 N))))

rewrite20.0ms

Algorithm
rewrite-expression-head
Counts
4 → 74
Calls

4 calls. Slowest were:

10.0ms
(- (/ 1 N) (* (/ 1 (* N N)) (- 1/2 (/ 1/3 N))))
8.0ms
(* (/ 1 (* N N)) (- 1/2 (/ 1/3 N)))
1.0ms
(/ 1 (* N N))

series94.0ms

Counts
4 → 12
Calls

4 calls. Slowest were:

43.0ms
(* (/ 1 (* N N)) (- 1/2 (/ 1/3 N)))
20.0ms
(- (/ 1 N) (* (/ 1 (* N N)) (- 1/2 (/ 1/3 N))))
18.0ms
(/ 1/3 N)

simplify7.5s

Counts
49 → 86
Calls

49 calls. Slowest were:

576.0ms
(* (/ 1 (* N N)) (- (/ 1/3 N)))
508.0ms
(* (/ 1 (* N N)) (- (/ 1/3 N)))
473.0ms
(* (/ 1 (* N N)) (- (/ 1/3 N)))

prune1.1s

Pruning

3 alts after pruning (2 fresh and 1 done)

Merged error: 0b

localize34.0ms

Local error

Found 4 expressions with local error:

0.4b
(- (+ (/ 1/3 N) 1/2) (/ 1/4 N))
0.4b
(/ -1/9 N)
0.4b
(/ 1/3 N)
0.2b
(* (/ -1/9 N) (/ 1 N))

rewrite18.0ms

Algorithm
rewrite-expression-head
Counts
4 → 60
Calls

4 calls. Slowest were:

14.0ms
(- (+ (/ 1/3 N) 1/2) (/ 1/4 N))
3.0ms
(* (/ -1/9 N) (/ 1 N))
0.0ms
(/ -1/9 N)

series58.0ms

Counts
4 → 12
Calls

4 calls. Slowest were:

19.0ms
(* (/ -1/9 N) (/ 1 N))
17.0ms
(- (+ (/ 1/3 N) 1/2) (/ 1/4 N))
12.0ms
(/ 1/3 N)

simplify1.5s

Counts
33 → 72
Calls

33 calls. Slowest were:

521.0ms
(* (* (* (/ -1/9 N) (/ -1/9 N)) (/ -1/9 N)) (* (* (/ 1 N) (/ 1 N)) (/ 1 N)))
435.0ms
(* (+ (* (/ 1/3 N) (/ 1/3 N)) (- (* 1/2 1/2) (* (/ 1/3 N) 1/2))) N)
164.0ms
(- (* (+ (pow (/ 1/3 N) 3) (pow 1/2 3)) N) (* (+ (* (/ 1/3 N) (/ 1/3 N)) (- (* 1/2 1/2) (* (/ 1/3 N) 1/2))) 1/4))

prune1.1s

Pruning

3 alts after pruning (1 fresh and 2 done)

Merged error: 0b

localize10.0ms

Local error

Found 2 expressions with local error:

3.2b
(log (/ (+ 1 N) N))
0.0b
(/ (+ 1 N) N)

rewrite6.0ms

Algorithm
rewrite-expression-head
Counts
2 → 29
Calls

2 calls. Slowest were:

4.0ms
(/ (+ 1 N) N)
2.0ms
(log (/ (+ 1 N) N))

series59.0ms

Counts
2 → 6
Calls

2 calls. Slowest were:

41.0ms
(log (/ (+ 1 N) N))
19.0ms
(/ (+ 1 N) N)

simplify395.0ms

Counts
16 → 35
Calls

16 calls. Slowest were:

177.0ms
(- (+ (* 1/3 (/ 1 (pow N 3))) (/ 1 N)) (* 1/2 (/ 1 (pow N 2))))
120.0ms
(- (+ (* 1/3 (/ 1 (pow N 3))) (/ 1 N)) (* 1/2 (/ 1 (pow N 2))))
63.0ms
(- N (+ (log N) (* 1/2 (pow N 2))))

prune307.0ms

Pruning

3 alts after pruning (0 fresh and 3 done)

Merged error: 0b

regimes33.0ms

Please include this information when filing a bug report:

herbie shell --seed 2018357 
(FPCore (N)
  :name "2log (problem 3.3.6)"
  (- (log (+ N 1)) (log N)))

Backtrace

partition: contract violation expected: list? given: 0.058029013008700794 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