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 r51438654 = alpha;
        double r51438655 = beta;
        double r51438656 = r51438654 + r51438655;
        double r51438657 = r51438655 * r51438654;
        double r51438658 = r51438656 + r51438657;
        double r51438659 = 1.0;
        double r51438660 = r51438658 + r51438659;
        double r51438661 = 2.0;
        double r51438662 = 1.0;
        double r51438663 = r51438661 * r51438662;
        double r51438664 = r51438656 + r51438663;
        double r51438665 = r51438660 / r51438664;
        double r51438666 = r51438665 / r51438664;
        double r51438667 = r51438664 + r51438659;
        double r51438668 = r51438666 / r51438667;
        return r51438668;
}

Reproduce

herbie shell --seed 2019124 
(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)))