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 r864189 = x;
        double r864190 = y;
        double r864191 = r864190 * r864190;
        double r864192 = z;
        double r864193 = r864192 * r864192;
        double r864194 = r864191 - r864193;
        double r864195 = sqrt(r864194);
        double r864196 = r864189 * r864195;
        return r864196;
}