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 r4022 = a;
        double r4023 = b;
        double r4024 = r4022 + r4023;
        double r4025 = c;
        double r4026 = r4024 + r4025;
        double r4027 = 2.0;
        double r4028 = r4026 / r4027;
        double r4029 = r4028 - r4022;
        double r4030 = r4028 * r4029;
        double r4031 = r4028 - r4023;
        double r4032 = r4030 * r4031;
        double r4033 = r4028 - r4025;
        double r4034 = r4032 * r4033;
        double r4035 = sqrt(r4034);
        return r4035;
}