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 r13935 = a;
        double r13936 = b;
        double r13937 = r13935 + r13936;
        double r13938 = c;
        double r13939 = r13937 + r13938;
        double r13940 = 2.0;
        double r13941 = r13939 / r13940;
        double r13942 = r13941 - r13935;
        double r13943 = r13941 * r13942;
        double r13944 = r13941 - r13936;
        double r13945 = r13943 * r13944;
        double r13946 = r13941 - r13938;
        double r13947 = r13945 * r13946;
        double r13948 = sqrt(r13947);
        return r13948;
}