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 r5170 = a;
        double r5171 = b;
        double r5172 = r5170 + r5171;
        double r5173 = c;
        double r5174 = r5172 + r5173;
        double r5175 = 2.0;
        double r5176 = r5174 / r5175;
        double r5177 = r5176 - r5170;
        double r5178 = r5176 * r5177;
        double r5179 = r5176 - r5171;
        double r5180 = r5178 * r5179;
        double r5181 = r5176 - r5173;
        double r5182 = r5180 * r5181;
        double r5183 = sqrt(r5182);
        return r5183;
}