Use the --timeout flag to change the timeout.
\lambda_1 + \tan^{-1}_* \frac{\left(\sin theta \cdot \sin delta\right) \cdot \cos \phi_1}{\cos delta - \sin \phi_1 \cdot \sin \left(\sin^{-1} \left(\sin \phi_1 \cdot \cos delta + \left(\cos \phi_1 \cdot \sin delta\right) \cdot \cos theta\right)\right)}double f(double lambda1, double phi1, double __attribute__((unused)) phi2, double delta, double theta) {
double r7843992 = lambda1;
double r7843993 = theta;
double r7843994 = sin(r7843993);
double r7843995 = delta;
double r7843996 = sin(r7843995);
double r7843997 = r7843994 * r7843996;
double r7843998 = phi1;
double r7843999 = cos(r7843998);
double r7844000 = r7843997 * r7843999;
double r7844001 = cos(r7843995);
double r7844002 = sin(r7843998);
double r7844003 = r7844002 * r7844001;
double r7844004 = r7843999 * r7843996;
double r7844005 = cos(r7843993);
double r7844006 = r7844004 * r7844005;
double r7844007 = r7844003 + r7844006;
double r7844008 = asin(r7844007);
double r7844009 = sin(r7844008);
double r7844010 = r7844002 * r7844009;
double r7844011 = r7844001 - r7844010;
double r7844012 = atan2(r7844000, r7844011);
double r7844013 = r7843992 + r7844012;
return r7844013;
}
herbie shell --seed 2019104
(FPCore (lambda1 phi1 phi2 delta theta)
:name "Destination given bearing on a great circle"
(+ lambda1 (atan2 (* (* (sin theta) (sin delta)) (cos phi1)) (- (cos delta) (* (sin phi1) (sin (asin (+ (* (sin phi1) (cos delta)) (* (* (cos phi1) (sin delta)) (cos theta))))))))))