Cannot sample enough valid points. (more)

\[0.0 \lt a \land 0.0 \lt b \land 0.0 \lt c\]
\[\sqrt{\left(\left(\frac{\left(a + b\right) + c}{2} \cdot \left(\frac{\left(a + b\right) + c}{2} - a\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - b\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - c\right)}\]
\sqrt{\left(\left(\frac{\left(a + b\right) + c}{2} \cdot \left(\frac{\left(a + b\right) + c}{2} - a\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - b\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - c\right)}
double f(double a, double b, double c) {
        double r3539 = a;
        double r3540 = b;
        double r3541 = r3539 + r3540;
        double r3542 = c;
        double r3543 = r3541 + r3542;
        double r3544 = 2.0;
        double r3545 = r3543 / r3544;
        double r3546 = r3545 - r3539;
        double r3547 = r3545 * r3546;
        double r3548 = r3545 - r3540;
        double r3549 = r3547 * r3548;
        double r3550 = r3545 - r3542;
        double r3551 = r3549 * r3550;
        double r3552 = sqrt(r3551);
        return r3552;
}