// verifast_options{disable_overflow_check target:ILP32} extern void abort(void); //@ requires true; //@ ensures true; void reach_error() //@ requires false; //@ ensures true; {}void assume_abort_if_not(int cond) //@ requires true; //@ ensures true; { if(!cond) {abort();} } void __VERIFIER_assert(int cond) //@ requires (cond != 0); //@ ensures (cond != 0); { if (!(cond)) { ERROR: {reach_error();abort();} } return; } int __VERIFIER_nondet_int(); //@ requires true; //@ ensures true; int main() //@ requires module(ddlm2013__verifast_instrumented, true); //@ ensures junk(); { //@ open_module(); unsigned int i,j,a,b; int flag = __VERIFIER_nondet_int(); a = 0; b = 0; j = 1; if (flag) { i = 0; } else { i = 1; } while (__VERIFIER_nondet_int()) //@ invariant ((flag == 0) || (((0 == (i % 2)) && (a == b)) && ((( a + 1) % 4294967296) == ((( b + j) + ( i * 4294967295)) % 4294967296)))); { a++; b += (j - i); i += 2; if (i%2 == 0) { j += 2; } else { j++; } } if (flag) { __VERIFIER_assert(a == b); } return 0; }