\frac{1}{\sqrt{x}} - \frac{1}{\sqrt{x + 1}}double f(double x) {
double r8659 = 1.0;
double r8660 = x;
double r8661 = sqrt(r8660);
double r8662 = r8659 / r8661;
double r8663 = r8660 + r8659;
double r8664 = sqrt(r8663);
double r8665 = r8659 / r8664;
double r8666 = r8662 - r8665;
return r8666;
}
Please include this information when filing a bug report:
herbie shell --seed 2019173
(FPCore (x)
:name "2isqrt (example 3.6)"
:herbie-target
(/ 1.0 (+ (* (+ x 1.0) (sqrt x)) (* x (sqrt (+ x 1.0)))))
(- (/ 1.0 (sqrt x)) (/ 1.0 (sqrt (+ x 1.0)))))
| atab-pick-alt: contract violation expected: alt? given: '(#<alt (λ (x) (- (/ 1.0 (sqrt x)) (/ 1.0 (sqrt (+ x 1.0)))))>) in: the range of the #:picking-func argument of (-> alt-table? #:only-fresh boolean? #:picking-func (-> (listof alt?) alt?) (values alt? alt-table?)) contract from: /data/pavpan/nightlies/herbie/no-costs-2/src/core/alt-table.rkt blaming: /data/pavpan/nightlies/herbie/no-costs-2/src/mainloop.rkt (assuming the contract is correct) at: /data/pavpan/nightlies/herbie/no-costs-2/src/core/alt-table.rkt:13.3 | L | C | |
|---|---|---|---|
| raise-blame-error16 | /opt/racket-7.0/collects/racket/contract/private/blame.rkt | 347 | 0 |
| (unnamed) | /data/pavpan/nightlies/herbie/no-costs-2/src/core/alt-table.rkt | 59 | 0 |
| (unnamed) | /opt/racket-7.0/collects/racket/contract/private/arrow-val-first.rkt | 388 | 18 |
| choose-best-alt! | /data/pavpan/nightlies/herbie/no-costs-2/src/mainloop.rkt | 110 | 0 |
| run-iter! | /data/pavpan/nightlies/herbie/no-costs-2/src/mainloop.rkt | 319 | 0 |
| for-loop | /data/pavpan/nightlies/herbie/no-costs-2/src/mainloop.rkt | 353 | 4 |
| run-improve43 | /data/pavpan/nightlies/herbie/no-costs-2/src/mainloop.rkt | 338 | 0 |
| (unnamed) | /opt/racket-7.0/collects/racket/private/more-scheme.rkt | 261 | 28 |
| run | /opt/racket-7.0/share/pkgs/profile-lib/main.rkt | 39 | 2 |
| profile-thunk16 | /opt/racket-7.0/share/pkgs/profile-lib/main.rkt | 9 | 0 |
| (unnamed) | /opt/racket-7.0/collects/racket/private/more-scheme.rkt | 261 | 28 |