Timeout in 10.0m

Use the --timeout flag to change the timeout.

\[0.0 \lt c_p \land 0.0 \lt c_n\]
\[\frac{{\left(\frac{1}{1 + e^{-s}}\right)}^{c_p} \cdot {\left(1 - \frac{1}{1 + e^{-s}}\right)}^{c_n}}{{\left(\frac{1}{1 + e^{-t}}\right)}^{c_p} \cdot {\left(1 - \frac{1}{1 + e^{-t}}\right)}^{c_n}}\]
\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 r8515133 = 1.0;
        double r8515134 = s;
        double r8515135 = -r8515134;
        double r8515136 = exp(r8515135);
        double r8515137 = r8515133 + r8515136;
        double r8515138 = r8515133 / r8515137;
        double r8515139 = c_p;
        double r8515140 = pow(r8515138, r8515139);
        double r8515141 = r8515133 - r8515138;
        double r8515142 = c_n;
        double r8515143 = pow(r8515141, r8515142);
        double r8515144 = r8515140 * r8515143;
        double r8515145 = t;
        double r8515146 = -r8515145;
        double r8515147 = exp(r8515146);
        double r8515148 = r8515133 + r8515147;
        double r8515149 = r8515133 / r8515148;
        double r8515150 = pow(r8515149, r8515139);
        double r8515151 = r8515133 - r8515149;
        double r8515152 = pow(r8515151, r8515142);
        double r8515153 = r8515150 * r8515152;
        double r8515154 = r8515144 / r8515153;
        return r8515154;
}

Reproduce

herbie shell --seed 2019172 
(FPCore (c_p c_n t s)
  :name "Harley's example"
  :pre (and (< 0.0 c_p) (< 0.0 c_n))

  :herbie-target
  (* (pow (/ (+ 1.0 (exp (- t))) (+ 1.0 (exp (- s)))) c_p) (pow (/ (+ 1.0 (exp t)) (+ 1.0 (exp s))) c_n))

  (/ (* (pow (/ 1.0 (+ 1.0 (exp (- s)))) c_p) (pow (- 1.0 (/ 1.0 (+ 1.0 (exp (- s))))) c_n)) (* (pow (/ 1.0 (+ 1.0 (exp (- t)))) c_p) (pow (- 1.0 (/ 1.0 (+ 1.0 (exp (- t))))) c_n))))