void abort() { }; void assume_abort_if_not(int cond) { if(!cond) {abort();} } /*@ requires ((\old(cond) != 0)) && (cond != 0); ensures ((\old(cond) != 0)) && (1); @*/ void __VERIFIER_assert(int cond) { if (!(cond)) { ERROR: {/*@ assert(0); */;abort();} } return; } int SIZE = 20000001; unsigned int __VERIFIER_nondet_uint(); int main() { unsigned int n,i,k,j,l=0; n = __VERIFIER_nondet_uint(); if (!(n <= SIZE)) return 0; i = 0; j = 0; k = 0; l=0; /*@ loop invariant ((((((long long) i + k) + j) % 4294967296) == l)); @*/ while( l < n ) { if(!(l%3)) i = i + 1; else if(!(l%2)) j = j+1; else k = k+1; l = l+1; } __VERIFIER_assert((i+j+k) == l); return 0; }