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 r15126 = a;
        double r15127 = b;
        double r15128 = r15126 + r15127;
        double r15129 = c;
        double r15130 = r15128 + r15129;
        double r15131 = 2.0;
        double r15132 = r15130 / r15131;
        double r15133 = r15132 - r15126;
        double r15134 = r15132 * r15133;
        double r15135 = r15132 - r15127;
        double r15136 = r15134 * r15135;
        double r15137 = r15132 - r15129;
        double r15138 = r15136 * r15137;
        double r15139 = sqrt(r15138);
        return r15139;
}