Cannot sample enough valid points. (more)

\[\left(\left(\log \left(x + y\right) + \log z\right) - t\right) + \left(a - 0.5\right) \cdot \log t\]
\left(\left(\log \left(x + y\right) + \log z\right) - t\right) + \left(a - 0.5\right) \cdot \log t
double f(double x, double y, double z, double t, double a) {
        double r420252 = x;
        double r420253 = y;
        double r420254 = r420252 + r420253;
        double r420255 = log(r420254);
        double r420256 = z;
        double r420257 = log(r420256);
        double r420258 = r420255 + r420257;
        double r420259 = t;
        double r420260 = r420258 - r420259;
        double r420261 = a;
        double r420262 = 0.5;
        double r420263 = r420261 - r420262;
        double r420264 = log(r420259);
        double r420265 = r420263 * r420264;
        double r420266 = r420260 + r420265;
        return r420266;
}