Error in 24.2s

Runtime

Time bar (total: 24.2s)Debug log

start211.0ms

Algorithm
intervals

setup127.0ms

Pruning

1 alts after pruning (1 fresh and 0 done)

Merged error: 28.1b

localize29.0ms

Local error

Found 3 expressions with local error:

27.0b
(sqrt (- (* x x) 1))
0.0b
(+ x (sqrt (- (* x x) 1)))
0.0b
(- (* x x) 1)

rewrite10.0ms

Algorithm
rewrite-expression-head
Counts
3 → 37
Calls

3 calls. Slowest were:

4.0ms
(sqrt (- (* x x) 1))
3.0ms
(- (* x x) 1)
3.0ms
(+ x (sqrt (- (* x x) 1)))

series92.0ms

Counts
3 → 9
Calls

3 calls. Slowest were:

34.0ms
(+ x (sqrt (- (* x x) 1)))
29.0ms
(- (* x x) 1)
29.0ms
(sqrt (- (* x x) 1))

simplify1.4s

Counts
17 → 46
Calls

17 calls. Slowest were:

398.0ms
(- (+ (* 1/2 (/ (pow x 2) (sqrt -1))) (sqrt -1)) (* 1/8 (/ (pow x 4) (pow (sqrt -1) 3))))
180.0ms
(- x (+ (* 1/8 (/ 1 (pow x 3))) (* 1/2 (/ 1 x))))
165.0ms
(- (* 2 x) (+ (* 1/8 (/ 1 (pow x 3))) (* 1/2 (/ 1 x))))

prune546.0ms

Pruning

2 alts after pruning (2 fresh and 0 done)

Merged error: 0b

localize20.0ms

Local error

Found 3 expressions with local error:

0.1b
(/ (/ 1/8 x) (* x x))
0.0b
(+ x (- (+ (/ -1/2 x) x) (/ (/ 1/8 x) (* x x))))
0.0b
(- (+ (/ -1/2 x) x) (/ (/ 1/8 x) (* x x)))

rewrite44.0ms

Algorithm
rewrite-expression-head
Counts
3 → 54
Calls

3 calls. Slowest were:

26.0ms
(+ x (- (+ (/ -1/2 x) x) (/ (/ 1/8 x) (* x x))))
15.0ms
(- (+ (/ -1/2 x) x) (/ (/ 1/8 x) (* x x)))
3.0ms
(/ (/ 1/8 x) (* x x))

series59.0ms

Counts
3 → 9
Calls

3 calls. Slowest were:

25.0ms
(+ x (- (+ (/ -1/2 x) x) (/ (/ 1/8 x) (* x x))))
17.0ms
(/ (/ 1/8 x) (* x x))
16.0ms
(- (+ (/ -1/2 x) x) (/ (/ 1/8 x) (* x x)))

simplify2.5s

Counts
36 → 63
Calls

36 calls. Slowest were:

543.0ms
(/ (* (* (/ 1/8 x) (/ 1/8 x)) (/ 1/8 x)) (* (* (* x x) (* x x)) (* x x)))
341.0ms
(* (+ (* (/ -1/2 x) (/ -1/2 x)) (- (* x x) (* (/ -1/2 x) x))) (* x x))
337.0ms
(- (* (+ (pow (/ -1/2 x) 3) (pow x 3)) (* x x)) (* (+ (* (/ -1/2 x) (/ -1/2 x)) (- (* x x) (* (/ -1/2 x) x))) (/ 1/8 x)))

prune732.0ms

Pruning

2 alts after pruning (1 fresh and 1 done)

Merged error: 0b

localize21.0ms

Local error

Found 4 expressions with local error:

27.9b
(cbrt (- (* x x) 1))
27.9b
(cbrt (- (* x x) 1))
27.9b
(cbrt (- (* x x) 1))
27.0b
(sqrt (* (* (cbrt (- (* x x) 1)) (cbrt (- (* x x) 1))) (cbrt (- (* x x) 1))))

rewrite14.0ms

Algorithm
rewrite-expression-head
Counts
4 → 77
Calls

4 calls. Slowest were:

8.0ms
(sqrt (* (* (cbrt (- (* x x) 1)) (cbrt (- (* x x) 1))) (cbrt (- (* x x) 1))))
1.0ms
(cbrt (- (* x x) 1))
1.0ms
(cbrt (- (* x x) 1))

series394.0ms

Counts
4 → 12
Calls

4 calls. Slowest were:

150.0ms
(cbrt (- (* x x) 1))
112.0ms
(cbrt (- (* x x) 1))
99.0ms
(cbrt (- (* x x) 1))

simplify9.0s

Counts
57 → 89
Calls

57 calls. Slowest were:

565.0ms
(sqrt (* (* (cbrt (- (* x x) 1)) (cbrt (- (* (* x x) (* x x)) (* 1 1)))) (cbrt (- (* x x) 1))))
517.0ms
(sqrt (* (* (cbrt (- (* (* x x) (* x x)) (* 1 1))) (cbrt (- (* x x) 1))) (cbrt (- (* (* x x) (* x x)) (* 1 1)))))
456.0ms
(sqrt (* (* (cbrt (- (* (* x x) (* x x)) (* 1 1))) (cbrt (- (* x x) 1))) (cbrt (- (* x x) 1))))

prune1.4s

Pruning

2 alts after pruning (0 fresh and 2 done)

Merged error: 0b

regimes21.0ms

Please include this information when filing a bug report:

herbie shell --seed 2018359 
(FPCore (x)
  :name "Hyperbolic arc-cosine"
  (log (+ x (sqrt (- (* x x) 1)))))

Backtrace

partition: contract violation expected: list? given: 0.2575435052134926 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