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 r688732 = x;
        double r688733 = y;
        double r688734 = r688733 * r688733;
        double r688735 = z;
        double r688736 = r688735 * r688735;
        double r688737 = r688734 - r688736;
        double r688738 = sqrt(r688737);
        double r688739 = r688732 * r688738;
        return r688739;
}