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 r5018 = a;
        double r5019 = b;
        double r5020 = r5018 + r5019;
        double r5021 = c;
        double r5022 = r5020 + r5021;
        double r5023 = 2.0;
        double r5024 = r5022 / r5023;
        double r5025 = r5024 - r5018;
        double r5026 = r5024 * r5025;
        double r5027 = r5024 - r5019;
        double r5028 = r5026 * r5027;
        double r5029 = r5024 - r5021;
        double r5030 = r5028 * r5029;
        double r5031 = sqrt(r5030);
        return r5031;
}