Error in 11.5s

Runtime

Time bar (total: 11.5s)Debug log

start137.0ms

Algorithm
intervals

setup186.0ms

Pruning

1 alts after pruning (1 fresh and 0 done)

Merged error: 17.4b

localize15.0ms

Local error

Found 1 expressions with local error:

17.4b
(/ (* i (/ i 4)) (- (* i (* 4 i)) 1.0))

rewrite6.0ms

Algorithm
rewrite-expression-head
Counts
1 → 22
Calls

1 calls. Slowest were:

5.0ms
(/ (* i (/ i 4)) (- (* i (* 4 i)) 1.0))

series44.0ms

Counts
1 → 3
Calls

1 calls. Slowest were:

44.0ms
(/ (* i (/ i 4)) (- (* i (* 4 i)) 1.0))

simplify703.0ms

Counts
17 → 25
Calls

17 calls. Slowest were:

186.0ms
(+ (* (* i (* 4 i)) (* i (* 4 i))) (+ (* 1.0 1.0) (* (* i (* 4 i)) 1.0)))
127.0ms
(- (log (* i (/ i 4))) (log (- (* i (* 4 i)) 1.0)))
111.0ms
(/ (* (* (* i (/ i 4)) (* i (/ i 4))) (* i (/ i 4))) (* (* (- (* i (* 4 i)) 1.0) (- (* i (* 4 i)) 1.0)) (- (* i (* 4 i)) 1.0)))

prune256.0ms

Pruning

3 alts after pruning (2 fresh and 1 done)

Merged error: 0b

localize10.0ms

Local error

Found 2 expressions with local error:

16.8b
(/ (- (* i (* 4 i)) 1.0) (/ i 4))
0.1b
(/ i (/ (- (* i (* 4 i)) 1.0) (/ i 4)))

rewrite16.0ms

Algorithm
rewrite-expression-head
Counts
2 → 63
Calls

2 calls. Slowest were:

13.0ms
(/ (- (* i (* 4 i)) 1.0) (/ i 4))
2.0ms
(/ i (/ (- (* i (* 4 i)) 1.0) (/ i 4)))

series102.0ms

Counts
2 → 6
Calls

2 calls. Slowest were:

70.0ms
(/ (- (* i (* 4 i)) 1.0) (/ i 4))
32.0ms
(/ i (/ (- (* i (* 4 i)) 1.0) (/ i 4)))

simplify3.7s

Counts
58 → 69
Calls

58 calls. Slowest were:

440.0ms
(- (pow (* i (* 4 i)) 3) (pow 1.0 3))
371.0ms
(/ (* (* (- (* i (* 4 i)) 1.0) (- (* i (* 4 i)) 1.0)) (- (* i (* 4 i)) 1.0)) (* (* (/ i 4) (/ i 4)) (/ i 4)))
266.0ms
(- (* (* i (* 4 i)) (* i (* 4 i))) (* 1.0 1.0))

prune697.0ms

Pruning

3 alts after pruning (1 fresh and 2 done)

Merged error: 0b

localize22.0ms

Local error

Found 2 expressions with local error:

0.1b
(/ i (- (* 16 i) (/ 4.0 i)))
0.0b
(- (* 16 i) (/ 4.0 i))

rewrite8.0ms

Algorithm
rewrite-expression-head
Counts
2 → 27
Calls

2 calls. Slowest were:

4.0ms
(- (* 16 i) (/ 4.0 i))
3.0ms
(/ i (- (* 16 i) (/ 4.0 i)))

series70.0ms

Counts
2 → 6
Calls

2 calls. Slowest were:

37.0ms
(- (* 16 i) (/ 4.0 i))
33.0ms
(/ i (- (* 16 i) (/ 4.0 i)))

simplify670.0ms

Counts
12 → 33
Calls

12 calls. Slowest were:

207.0ms
(+ (* (* 16 i) (* 16 i)) (+ (* (/ 4.0 i) (/ 4.0 i)) (* (* 16 i) (/ 4.0 i))))
84.0ms
(- (+ (* 0.25 (pow i 2)) (+ (* 1.0 (pow i 4)) (* 4.0 (pow i 6)))))
77.0ms
(- (* 16 i) (* 4.0 (/ 1 i)))

prune301.0ms

Pruning

3 alts after pruning (0 fresh and 3 done)

Merged error: 0b

regimes25.0ms

Please include this information when filing a bug report:

herbie shell --seed 2018359 
(FPCore (i)
  :name "Octave 3.8, jcobi/4, as called"
  :pre (and (> i 0))
  (/ (/ (* (* i i) (* i i)) (* (* 2 i) (* 2 i))) (- (* (* 2 i) (* 2 i)) 1.0)))

Backtrace

partition: contract violation expected: list? given: 0.20472335528880334 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