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 r52510565 = alpha;
        double r52510566 = beta;
        double r52510567 = r52510565 + r52510566;
        double r52510568 = r52510566 * r52510565;
        double r52510569 = r52510567 + r52510568;
        double r52510570 = 1.0;
        double r52510571 = r52510569 + r52510570;
        double r52510572 = 2.0;
        double r52510573 = 1.0;
        double r52510574 = r52510572 * r52510573;
        double r52510575 = r52510567 + r52510574;
        double r52510576 = r52510571 / r52510575;
        double r52510577 = r52510576 / r52510575;
        double r52510578 = r52510575 + r52510570;
        double r52510579 = r52510577 / r52510578;
        return r52510579;
}

Reproduce

herbie shell --seed 2019104 
(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)))