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 r7141 = a;
        double r7142 = b;
        double r7143 = r7141 + r7142;
        double r7144 = c;
        double r7145 = r7143 + r7144;
        double r7146 = 2.0;
        double r7147 = r7145 / r7146;
        double r7148 = r7147 - r7141;
        double r7149 = r7147 * r7148;
        double r7150 = r7147 - r7142;
        double r7151 = r7149 * r7150;
        double r7152 = r7147 - r7144;
        double r7153 = r7151 * r7152;
        double r7154 = sqrt(r7153);
        return r7154;
}