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 r20906 = a;
        double r20907 = b;
        double r20908 = r20906 + r20907;
        double r20909 = c;
        double r20910 = r20908 + r20909;
        double r20911 = 2.0;
        double r20912 = r20910 / r20911;
        double r20913 = r20912 - r20906;
        double r20914 = r20912 * r20913;
        double r20915 = r20912 - r20907;
        double r20916 = r20914 * r20915;
        double r20917 = r20912 - r20909;
        double r20918 = r20916 * r20917;
        double r20919 = sqrt(r20918);
        return r20919;
}