Error in 27.7s

Runtime

Time bar (total: 27.7s)Debug log

start190.0ms

Algorithm
intervals

setup109.0ms

Pruning

1 alts after pruning (1 fresh and 0 done)

Merged error: 28.1b

localize13.0ms

Local error

Found 2 expressions with local error:

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

rewrite4.0ms

Algorithm
rewrite-expression-head
Counts
2 → 26
Calls

2 calls. Slowest were:

2.0ms
(+ x (sqrt (fma x x -1)))
2.0ms
(sqrt (fma x x -1))

series89.0ms

Counts
2 → 6
Calls

2 calls. Slowest were:

50.0ms
(+ x (sqrt (fma x x -1)))
38.0ms
(sqrt (fma x x -1))

simplify1.4s

Counts
10 → 32
Calls

10 calls. Slowest were:

539.0ms
(- (+ (* 1/2 (/ (pow x 2) (sqrt -1))) (sqrt -1)) (* 1/8 (/ (pow x 4) (pow (sqrt -1) 3))))
279.0ms
(- (* 2 x) (+ (* 1/8 (/ 1 (pow x 3))) (* 1/2 (/ 1 x))))
244.0ms
(- x (+ (* 1/8 (/ 1 (pow x 3))) (* 1/2 (/ 1 x))))

prune310.0ms

Pruning

3 alts after pruning (2 fresh and 1 done)

Merged error: 0b

localize41.0ms

Local error

Found 2 expressions with local error:

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

rewrite18.0ms

Algorithm
rewrite-expression-head
Counts
2 → 69
Calls

2 calls. Slowest were:

10.0ms
(- (fma 2 x (/ -1/2 x)) (/ (/ 1/8 x) (* x x)))
6.0ms
(/ (/ 1/8 x) (* x x))

series39.0ms

Counts
2 → 6
Calls

2 calls. Slowest were:

21.0ms
(/ (/ 1/8 x) (* x x))
18.0ms
(- (fma 2 x (/ -1/2 x)) (/ (/ 1/8 x) (* x x)))

simplify11.8s

Counts
75 → 75
Calls

75 calls. Slowest were:

715.0ms
(/ (* (* (/ 1/8 x) (/ 1/8 x)) (/ 1/8 x)) (* (* (* x x) (* x x)) (* x x)))
474.0ms
(fma (- (/ (/ 1 x) x)) (/ 1/8 x) (* (/ (/ 1 x) x) (/ 1/8 x)))
458.0ms
(fma (- (/ 1 (* x x))) (/ 1/8 x) (* (/ 1 (* x x)) (/ 1/8 x)))

prune981.0ms

Pruning

3 alts after pruning (1 fresh and 2 done)

Merged error: 0b

localize20.0ms

Local error

Found 4 expressions with local error:

27.0b
(sqrt (fma x x -1))
27.0b
(sqrt (fma x x -1))
27.0b
(sqrt (fma x x -1))
0.6b
(* (cbrt (sqrt (fma x x -1))) (cbrt (sqrt (fma x x -1))))

rewrite18.0ms

Algorithm
rewrite-expression-head
Counts
4 → 78
Calls

4 calls. Slowest were:

12.0ms
(* (cbrt (sqrt (fma x x -1))) (cbrt (sqrt (fma x x -1))))
2.0ms
(sqrt (fma x x -1))
1.0ms
(sqrt (fma x x -1))

series240.0ms

Counts
4 → 12
Calls

4 calls. Slowest were:

129.0ms
(* (cbrt (sqrt (fma x x -1))) (cbrt (sqrt (fma x x -1))))
38.0ms
(sqrt (fma x x -1))
37.0ms
(sqrt (fma x x -1))

simplify3.5s

Counts
50 → 90
Calls

50 calls. Slowest were:

470.0ms
(- (+ (* 1/2 (/ (pow x 2) (sqrt -1))) (sqrt -1)) (* 1/8 (/ (pow x 4) (pow (sqrt -1) 3))))
458.0ms
(- (+ (* 1/2 (/ (pow x 2) (sqrt -1))) (sqrt -1)) (* 1/8 (/ (pow x 4) (pow (sqrt -1) 3))))
452.0ms
(- (+ (* 1/2 (/ (pow x 2) (sqrt -1))) (sqrt -1)) (* 1/8 (/ (pow x 4) (pow (sqrt -1) 3))))

prune1.1s

Pruning

3 alts after pruning (0 fresh and 3 done)

Merged error: 0b

regimes35.0ms

Please include this information when filing a bug report:

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

Backtrace

partition: contract violation expected: list? given: 0.2570543157637327 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