Timeout in 10.0m

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\[1 - \left(\frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot \left(0.25482959199999999 + \frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot \left(-0.284496735999999972 + \frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot \left(1.42141374100000006 + \frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot \left(-1.45315202700000001 + \frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot 1.0614054289999999\right)\right)\right)\right)\right) \cdot e^{-\left|x\right| \cdot \left|x\right|}\]
1 - \left(\frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot \left(0.25482959199999999 + \frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot \left(-0.284496735999999972 + \frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot \left(1.42141374100000006 + \frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot \left(-1.45315202700000001 + \frac{1}{1 + 0.32759110000000002 \cdot \left|x\right|} \cdot 1.0614054289999999\right)\right)\right)\right)\right) \cdot e^{-\left|x\right| \cdot \left|x\right|}
double f(double x) {
        double r315082 = 1.0;
        double r315083 = 0.3275911;
        double r315084 = x;
        double r315085 = fabs(r315084);
        double r315086 = r315083 * r315085;
        double r315087 = r315082 + r315086;
        double r315088 = r315082 / r315087;
        double r315089 = 0.254829592;
        double r315090 = -0.284496736;
        double r315091 = 1.421413741;
        double r315092 = -1.453152027;
        double r315093 = 1.061405429;
        double r315094 = r315088 * r315093;
        double r315095 = r315092 + r315094;
        double r315096 = r315088 * r315095;
        double r315097 = r315091 + r315096;
        double r315098 = r315088 * r315097;
        double r315099 = r315090 + r315098;
        double r315100 = r315088 * r315099;
        double r315101 = r315089 + r315100;
        double r315102 = r315088 * r315101;
        double r315103 = r315085 * r315085;
        double r315104 = -r315103;
        double r315105 = exp(r315104);
        double r315106 = r315102 * r315105;
        double r315107 = r315082 - r315106;
        return r315107;
}

Reproduce

herbie shell --seed 2020014 
(FPCore (x)
  :name "Jmat.Real.erf"
  :precision binary64
  (- 1 (* (* (/ 1 (+ 1 (* 0.3275911 (fabs x)))) (+ 0.254829592 (* (/ 1 (+ 1 (* 0.3275911 (fabs x)))) (+ -0.284496736 (* (/ 1 (+ 1 (* 0.3275911 (fabs x)))) (+ 1.421413741 (* (/ 1 (+ 1 (* 0.3275911 (fabs x)))) (+ -1.453152027 (* (/ 1 (+ 1 (* 0.3275911 (fabs x)))) 1.061405429))))))))) (exp (- (* (fabs x) (fabs x)))))))