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 r17507 = a;
        double r17508 = b;
        double r17509 = r17507 + r17508;
        double r17510 = c;
        double r17511 = r17509 + r17510;
        double r17512 = 2.0;
        double r17513 = r17511 / r17512;
        double r17514 = r17513 - r17507;
        double r17515 = r17513 * r17514;
        double r17516 = r17513 - r17508;
        double r17517 = r17515 * r17516;
        double r17518 = r17513 - r17510;
        double r17519 = r17517 * r17518;
        double r17520 = sqrt(r17519);
        return r17520;
}