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 r9671 = a;
        double r9672 = b;
        double r9673 = r9671 + r9672;
        double r9674 = c;
        double r9675 = r9673 + r9674;
        double r9676 = 2.0;
        double r9677 = r9675 / r9676;
        double r9678 = r9677 - r9671;
        double r9679 = r9677 * r9678;
        double r9680 = r9677 - r9672;
        double r9681 = r9679 * r9680;
        double r9682 = r9677 - r9674;
        double r9683 = r9681 * r9682;
        double r9684 = sqrt(r9683);
        return r9684;
}