Timeout in 10.0m

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\[\alpha \gt -1 \land \beta \gt -1\]
\[\frac{\frac{\frac{\left(\left(\alpha + \beta\right) + \beta \cdot \alpha\right) + 1.0}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1.0}\]
\frac{\frac{\frac{\left(\left(\alpha + \beta\right) + \beta \cdot \alpha\right) + 1.0}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\alpha + \beta\right) + 2 \cdot 1}}{\left(\left(\alpha + \beta\right) + 2 \cdot 1\right) + 1.0}
double f(double alpha, double beta) {
        double r12416118 = alpha;
        double r12416119 = beta;
        double r12416120 = r12416118 + r12416119;
        double r12416121 = r12416119 * r12416118;
        double r12416122 = r12416120 + r12416121;
        double r12416123 = 1.0;
        double r12416124 = r12416122 + r12416123;
        double r12416125 = 2.0;
        double r12416126 = 1.0;
        double r12416127 = r12416125 * r12416126;
        double r12416128 = r12416120 + r12416127;
        double r12416129 = r12416124 / r12416128;
        double r12416130 = r12416129 / r12416128;
        double r12416131 = r12416128 + r12416123;
        double r12416132 = r12416130 / r12416131;
        return r12416132;
}

Reproduce

herbie shell --seed 2019130 
(FPCore (alpha beta)
  :name "Octave 3.8, jcobi/3"
  :pre (and (> alpha -1) (> beta -1))
  (/ (/ (/ (+ (+ (+ alpha beta) (* beta alpha)) 1.0) (+ (+ alpha beta) (* 2 1))) (+ (+ alpha beta) (* 2 1))) (+ (+ (+ alpha beta) (* 2 1)) 1.0)))