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 r266554 = 1.0;
        double r266555 = 0.3275911;
        double r266556 = x;
        double r266557 = fabs(r266556);
        double r266558 = r266555 * r266557;
        double r266559 = r266554 + r266558;
        double r266560 = r266554 / r266559;
        double r266561 = 0.254829592;
        double r266562 = -0.284496736;
        double r266563 = 1.421413741;
        double r266564 = -1.453152027;
        double r266565 = 1.061405429;
        double r266566 = r266560 * r266565;
        double r266567 = r266564 + r266566;
        double r266568 = r266560 * r266567;
        double r266569 = r266563 + r266568;
        double r266570 = r266560 * r266569;
        double r266571 = r266562 + r266570;
        double r266572 = r266560 * r266571;
        double r266573 = r266561 + r266572;
        double r266574 = r266560 * r266573;
        double r266575 = r266557 * r266557;
        double r266576 = -r266575;
        double r266577 = exp(r266576);
        double r266578 = r266574 * r266577;
        double r266579 = r266554 - r266578;
        return r266579;
}

Reproduce

herbie shell --seed 2020046 
(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)))))))