Error in 11.4s

Runtime

Time bar (total: 11.4s)Debug log

start88.0ms

Algorithm
intervals

setup17.0ms

Pruning

1 alts after pruning (1 fresh and 0 done)

Merged error: 28.7b

localize24.0ms

Local error

Found 2 expressions with local error:

3.9b
(log (+ 1 N))
3.3b
(- (log (+ 1 N)) (log N))

rewrite11.0ms

Algorithm
rewrite-expression-head
Counts
2 → 34
Calls

2 calls. Slowest were:

9.0ms
(- (log (+ 1 N)) (log N))
2.0ms
(log (+ 1 N))

series88.0ms

Counts
2 → 6
Calls

2 calls. Slowest were:

63.0ms
(- (log (+ 1 N)) (log N))
25.0ms
(log (+ 1 N))

simplify969.0ms

Counts
22 → 40
Calls

22 calls. Slowest were:

332.0ms
(- (+ (/ 1 N) (log -1)) (+ (* 1/2 (/ 1 (pow N 2))) (log (/ -1 N))))
157.0ms
(- (+ (* 1/3 (/ 1 (pow N 3))) (/ 1 N)) (* 1/2 (/ 1 (pow N 2))))
139.0ms
(- (/ 1 N) (+ (* 1/2 (/ 1 (pow N 2))) (log (/ 1 N))))

prune371.0ms

Pruning

4 alts after pruning (4 fresh and 0 done)

Merged error: 0.0b

localize11.0ms

Local error

Found 2 expressions with local error:

3.5b
(log (/ (+ 1 N) N))
0.0b
(/ (+ 1 N) N)

rewrite7.0ms

Algorithm
rewrite-expression-head
Counts
2 → 29
Calls

2 calls. Slowest were:

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

series67.0ms

Counts
2 → 6
Calls

2 calls. Slowest were:

48.0ms
(log (/ (+ 1 N) N))
19.0ms
(/ (+ 1 N) N)

simplify297.0ms

Counts
16 → 35
Calls

16 calls. Slowest were:

111.0ms
(- (+ (* 1/3 (/ 1 (pow N 3))) (/ 1 N)) (* 1/2 (/ 1 (pow N 2))))
102.0ms
(- (+ (* 1/3 (/ 1 (pow N 3))) (/ 1 N)) (* 1/2 (/ 1 (pow N 2))))
46.0ms
(- N (+ (log N) (* 1/2 (pow N 2))))

prune262.0ms

Pruning

4 alts after pruning (4 fresh and 0 done)

Merged error: 0.0b

localize16.0ms

Local error

Found 4 expressions with local error:

3.2b
(log (* (sqrt (/ (+ 1 N) N)) (sqrt (/ (+ 1 N) N))))
0.3b
(* (sqrt (/ (+ 1 N) N)) (sqrt (/ (+ 1 N) N)))
0.1b
(sqrt (/ (+ 1 N) N))
0.1b
(sqrt (/ (+ 1 N) N))

rewrite23.0ms

Algorithm
rewrite-expression-head
Counts
4 → 83
Calls

4 calls. Slowest were:

8.0ms
(* (sqrt (/ (+ 1 N) N)) (sqrt (/ (+ 1 N) N)))
7.0ms
(log (* (sqrt (/ (+ 1 N) N)) (sqrt (/ (+ 1 N) N))))
4.0ms
(sqrt (/ (+ 1 N) N))

series127.0ms

Counts
4 → 12
Calls

4 calls. Slowest were:

48.0ms
(log (* (sqrt (/ (+ 1 N) N)) (sqrt (/ (+ 1 N) N))))
32.0ms
(* (sqrt (/ (+ 1 N) N)) (sqrt (/ (+ 1 N) N)))
31.0ms
(sqrt (/ (+ 1 N) N))

simplify1.5s

Counts
61 → 95
Calls

61 calls. Slowest were:

304.0ms
(* (/ (+ 1 N) N) (/ (+ 1 N) N))
221.0ms
(* (/ (+ 1 N) N) (/ (+ 1 N) N))
203.0ms
(* (* (* (sqrt (/ (+ 1 N) N)) (sqrt (/ (+ 1 N) N))) (sqrt (/ (+ 1 N) N))) (* (* (sqrt (/ (+ 1 N) N)) (sqrt (/ (+ 1 N) N))) (sqrt (/ (+ 1 N) N))))

prune780.0ms

Pruning

4 alts after pruning (3 fresh and 1 done)

Merged error: 0.0b

localize9.0ms

Local error

Found 4 expressions with local error:

3.5b
(log (/ (+ 1 N) N))
3.5b
(log (/ (+ 1 N) N))
3.5b
(log (/ (+ 1 N) N))
0.3b
(cbrt (log (/ (+ 1 N) N)))

rewrite4.0ms

Algorithm
rewrite-expression-head
Counts
4 → 54
Calls

4 calls. Slowest were:

1.0ms
(log (/ (+ 1 N) N))
1.0ms
(log (/ (+ 1 N) N))
1.0ms
(log (/ (+ 1 N) N))

series189.0ms

Counts
4 → 12
Calls

4 calls. Slowest were:

76.0ms
(cbrt (log (/ (+ 1 N) N)))
41.0ms
(log (/ (+ 1 N) N))
37.0ms
(log (/ (+ 1 N) N))

simplify1.5s

Counts
34 → 66
Calls

34 calls. Slowest were:

309.0ms
(- (+ (pow (- (log N)) 1/3) (* 1/6 (* (pow (/ -1 (pow (log N) 2)) 1/3) (pow N 2)))) (+ (* 1/9 (* (pow (/ -1 (pow (log N) 5)) 1/3) (pow N 2))) (* 1/3 (* (pow (/ -1 (pow (log N) 2)) 1/3) N))))
199.0ms
(- (+ (exp (* 1/3 (+ (log (/ -1 N)) (log -1)))) (* 1/12 (/ (exp (* 1/3 (+ (log (/ -1 N)) (log -1)))) (pow N 2)))) (* 1/6 (/ (exp (* 1/3 (+ (log (/ -1 N)) (log -1)))) N)))
153.0ms
(- (+ (* 1/3 (/ 1 (pow N 3))) (/ 1 N)) (* 1/2 (/ 1 (pow N 2))))

prune629.0ms

Pruning

4 alts after pruning (3 fresh and 1 done)

Merged error: 0.0b

regimes32.0ms

Please include this information when filing a bug report:

herbie shell --seed 2018359 
(FPCore (N)
  :name "2log (problem 3.3.6)"
  (- (log (+ N 1)) (log N)))

Backtrace

partition: contract violation expected: list? given: 0.0678091680183312 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