// verifast_options{disable_overflow_check target:ILP32} extern void abort(void); //@ requires true; //@ ensures true; void reach_error() //@ requires false; //@ ensures true; {} void __VERIFIER_assert(int cond) //@ requires (cond != 0); //@ ensures (cond != 0); { if (!(cond)) { ERROR: {reach_error();abort();} } return; } extern bool __VERIFIER_nondet_bool(); //@ requires true; //@ ensures true; int main() //@ requires module(n_c11__verifast_instrumented, true); //@ ensures junk(); { //@ open_module(); int a[5]; unsigned int len=0; int i; while(__VERIFIER_nondet_bool()) //@ invariant (len < 5); { if (len==4) len =0; a[len]=0; len++; } __VERIFIER_assert(len>=0 && len<5); return 1; return 0; }