\[\frac{x}{x + y \cdot e^{2 \cdot \left(\frac{z \cdot \sqrt{t + a}}{t} - \left(b - c\right) \cdot \left(\left(a + \frac{5}{6}\right) - \frac{2}{t \cdot 3}\right)\right)}}\]

\frac{x}{x + y \cdot e^{2 \cdot \left(\frac{z \cdot \sqrt{t + a}}{t} - \left(b - c\right) \cdot \left(\left(a + \frac{5}{6}\right) - \frac{2}{t \cdot 3}\right)\right)}}

double f(double x, double y, double z, double t, double a, double b, double c) {
        double r8481 = x;
        double r8482 = y;
        double r8483 = 2.0;
        double r8484 = z;
        double r8485 = t;
        double r8486 = a;
        double r8487 = r8485 + r8486;
        double r8488 = sqrt(r8487);
        double r8489 = r8484 * r8488;
        double r8490 = r8489 / r8485;
        double r8491 = b;
        double r8492 = c;
        double r8493 = r8491 - r8492;
        double r8494 = 5.0;
        double r8495 = 6.0;
        double r8496 = r8494 / r8495;
        double r8497 = r8486 + r8496;
        double r8498 = 3.0;
        double r8499 = r8485 * r8498;
        double r8500 = r8483 / r8499;
        double r8501 = r8497 - r8500;
        double r8502 = r8493 * r8501;
        double r8503 = r8490 - r8502;
        double r8504 = r8483 * r8503;
        double r8505 = exp(r8504);
        double r8506 = r8482 * r8505;
        double r8507 = r8481 + r8506;
        double r8508 = r8481 / r8507;
        return r8508;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019173 
(FPCore (x y z t a b c)
  :name "Numeric.SpecFunctions:invIncompleteBetaWorker from math-functions-0.1.5.2"
  (/ x (+ x (* y (exp (* 2.0 (- (/ (* z (sqrt (+ t a))) t) (* (- b c) (- (+ a (/ 5.0 6.0)) (/ 2.0 (* t 3.0)))))))))))

Backtrace

atab-pick-alt: contract violation expected: alt? given: '(#<alt (λ (x y z t a b c) (/ x (+ (* y (exp (* 2.0 (+ (* z (/ (sqrt (+ a t)) t)) (* (- c b) (+ (- a (/ (/ 2.0 3.0) t)) (/ 5.0 6.0))))))) x)))>) 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