Cannot sample enough valid points. (more)

\[x \cdot \sqrt{y \cdot y - z \cdot z}\]
x \cdot \sqrt{y \cdot y - z \cdot z}
double f(double x, double y, double z) {
        double r668718 = x;
        double r668719 = y;
        double r668720 = r668719 * r668719;
        double r668721 = z;
        double r668722 = r668721 * r668721;
        double r668723 = r668720 - r668722;
        double r668724 = sqrt(r668723);
        double r668725 = r668718 * r668724;
        return r668725;
}