extern int __VERIFIER_nondet_int(void);

int foo(int x,int y,int tmp,int xtmp){
while(y != 0) {
        tmp = y;
        xtmp = x;
        
        if(x <= 0 || y <= 0) {
            y = 0;
        } else {
            if (x == y) {
                y = 0;
            } else {
                while(xtmp>y) {
                    xtmp = xtmp - y;
                }
            }
        }
        
        y = xtmp;
        x = tmp;
    }
return 0;
}