Timeout in 10.0m

Use the --timeout flag to change the timeout.

\[0 \lt c_p \land 0 \lt c_n\]
\[\frac{{\left(\frac{1}{1 + e^{-s}}\right)}^{c_p} \cdot {\left(1 - \frac{1}{1 + e^{-s}}\right)}^{c_n}}{{\left(\frac{1}{1 + e^{-t}}\right)}^{c_p} \cdot {\left(1 - \frac{1}{1 + e^{-t}}\right)}^{c_n}}\]
\frac{{\left(\frac{1}{1 + e^{-s}}\right)}^{c_p} \cdot {\left(1 - \frac{1}{1 + e^{-s}}\right)}^{c_n}}{{\left(\frac{1}{1 + e^{-t}}\right)}^{c_p} \cdot {\left(1 - \frac{1}{1 + e^{-t}}\right)}^{c_n}}
double f(double c_p, double c_n, double t, double s) {
        double r10929738 = 1.0;
        double r10929739 = s;
        double r10929740 = -r10929739;
        double r10929741 = exp(r10929740);
        double r10929742 = r10929738 + r10929741;
        double r10929743 = r10929738 / r10929742;
        double r10929744 = c_p;
        double r10929745 = pow(r10929743, r10929744);
        double r10929746 = r10929738 - r10929743;
        double r10929747 = c_n;
        double r10929748 = pow(r10929746, r10929747);
        double r10929749 = r10929745 * r10929748;
        double r10929750 = t;
        double r10929751 = -r10929750;
        double r10929752 = exp(r10929751);
        double r10929753 = r10929738 + r10929752;
        double r10929754 = r10929738 / r10929753;
        double r10929755 = pow(r10929754, r10929744);
        double r10929756 = r10929738 - r10929754;
        double r10929757 = pow(r10929756, r10929747);
        double r10929758 = r10929755 * r10929757;
        double r10929759 = r10929749 / r10929758;
        return r10929759;
}

Reproduce

herbie shell --seed 2019163 
(FPCore (c_p c_n t s)
  :name "Harley's example"
  :pre (and (< 0 c_p) (< 0 c_n))

  :herbie-target
  (* (pow (/ (+ 1 (exp (- t))) (+ 1 (exp (- s)))) c_p) (pow (/ (+ 1 (exp t)) (+ 1 (exp s))) c_n))

  (/ (* (pow (/ 1 (+ 1 (exp (- s)))) c_p) (pow (- 1 (/ 1 (+ 1 (exp (- s))))) c_n)) (* (pow (/ 1 (+ 1 (exp (- t)))) c_p) (pow (- 1 (/ 1 (+ 1 (exp (- t))))) c_n))))