typedef enum {false,true} bool; extern int __VERIFIER_nondet_int(void); int main() { int x; int y; int z; int res; x = __VERIFIER_nondet_int(); y = __VERIFIER_nondet_int(); res = 0; while (y > 0) { z = x; x = y-1; y = z; res = res+1; } res = res + x; return 0; }