\[\cos \left(\frac{K \cdot \left(m + n\right)}{2} - M\right) \cdot e^{\left(-{\left(\frac{m + n}{2} - M\right)}^{2}\right) - \left(\ell - \left|m - n\right|\right)}\]
\cos \left(\frac{K \cdot \left(m + n\right)}{2} - M\right) \cdot e^{\left(-{\left(\frac{m + n}{2} - M\right)}^{2}\right) - \left(\ell - \left|m - n\right|\right)}
double f(double K, double m, double n, double M, double l) {
        double r8306 = K;
        double r8307 = m;
        double r8308 = n;
        double r8309 = r8307 + r8308;
        double r8310 = r8306 * r8309;
        double r8311 = 2.0;
        double r8312 = r8310 / r8311;
        double r8313 = M;
        double r8314 = r8312 - r8313;
        double r8315 = cos(r8314);
        double r8316 = r8309 / r8311;
        double r8317 = r8316 - r8313;
        double r8318 = pow(r8317, r8311);
        double r8319 = -r8318;
        double r8320 = l;
        double r8321 = r8307 - r8308;
        double r8322 = fabs(r8321);
        double r8323 = r8320 - r8322;
        double r8324 = r8319 - r8323;
        double r8325 = exp(r8324);
        double r8326 = r8315 * r8325;
        return r8326;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 +o rules:numerics
(FPCore (K m n M l)
  :name "Maksimov and Kolovsky, Equation (32)"
  (* (cos (- (/ (* K (+ m n)) 2.0) M)) (exp (- (- (pow (- (/ (+ m n) 2.0) M) 2.0)) (- l (fabs (- m n)))))))

Backtrace

get-representation: Unknown representation #fLC
loop/data/pavpan/nightlies/herbie/interface2/src/points.rkt1224
prepare-points/data/pavpan/nightlies/herbie/interface2/src/points.rkt1460
setup-prog!34/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt670
run-improve43/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt3390
(unnamed)/opt/racket-7.0/collects/racket/private/more-scheme.rkt26128
run/opt/racket-7.0/share/pkgs/profile-lib/main.rkt392
profile-thunk16/opt/racket-7.0/share/pkgs/profile-lib/main.rkt90
(unnamed)/opt/racket-7.0/collects/racket/private/more-scheme.rkt26128