\[\left(-x \cdot \frac{1}{\tan B}\right) + \frac{F}{\sin B} \cdot {\left(\left(F \cdot F + 2\right) + 2 \cdot x\right)}^{\left(-\frac{1}{2}\right)}\]

\left(-x \cdot \frac{1}{\tan B}\right) + \frac{F}{\sin B} \cdot {\left(\left(F \cdot F + 2\right) + 2 \cdot x\right)}^{\left(-\frac{1}{2}\right)}

double f(double F, double B, double x) {
        double r71480 = x;
        double r71481 = 1.0;
        double r71482 = B;
        double r71483 = tan(r71482);
        double r71484 = r71481 / r71483;
        double r71485 = r71480 * r71484;
        double r71486 = -r71485;
        double r71487 = F;
        double r71488 = sin(r71482);
        double r71489 = r71487 / r71488;
        double r71490 = r71487 * r71487;
        double r71491 = 2.0;
        double r71492 = r71490 + r71491;
        double r71493 = r71491 * r71480;
        double r71494 = r71492 + r71493;
        double r71495 = r71481 / r71491;
        double r71496 = -r71495;
        double r71497 = pow(r71494, r71496);
        double r71498 = r71489 * r71497;
        double r71499 = r71486 + r71498;
        return r71499;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019323 +o rules:numerics
(FPCore (F B x)
  :name "VandenBroeck and Keller, Equation (23)"
  :precision binary64
  (+ (- (* x (/ 1 (tan B)))) (* (/ F (sin B)) (pow (+ (+ (* F F) 2) (* 2 x)) (- (/ 1 2))))))

Backtrace

dict-ref: no value for key: 'branch71479 in: '((F . binary64) (B . binary64) (x . binary64))		L	C
for-loop	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/points.rkt	106	4
make-sampler	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/points.rkt	99	0
prepare-points-intervals	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/points.rkt	121	0
for-loop	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/regimes.rkt	233	9
sindices->spoints	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/regimes.rkt	194	0
f33	/opt/racket-7.2/collects/racket/match/compiler.rkt	507	40
get-final-combination	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	369	0
(unnamed)	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.2/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.2/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	261	28