// verifast_options{disable_overflow_check target:ILP32} extern void __assert_fail (const char *__assertion, const char *__file, unsigned int __line, const char *__function) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__noreturn__)); extern void __assert_perror_fail (int __errnum, const char *__file, unsigned int __line, const char *__function) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__noreturn__)); extern void __assert (const char *__assertion, const char *__file, int __line) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__noreturn__)); extern void abort(void);//@ requires true; //@ ensures true; void reach_error() //@ requires false; //@ ensures true; { ((void) sizeof ((0) ? 1 : 0), __extension__ ({ if (0) ; else __assert_fail ("0", "bh-ex3.c", 3, __extension__ __PRETTY_FUNCTION__); })); } void __VERIFIER_assert(int cond) //@ requires (cond != 0); //@ ensures (cond != 0); { if(!(cond)) { ERROR: {reach_error();abort();} } } extern _Bool __VERIFIER_nondet_bool();//@ requires true; //@ ensures true; int main() //@ requires module(bh2017_ex3__verifast_instrumented_modified, true); //@ ensures junk(); { int m = 0; //@ invariant true; int n = 0; while (1)//@ invariant ((m <= 60) && (n <= 60)); { __VERIFIER_assert(m <= 60); __VERIFIER_assert(n <= 60); if (__VERIFIER_nondet_bool()) { if (__VERIFIER_nondet_bool()) { if (m < 60) { m++; } else { __VERIFIER_assert(m == 60); m = 0; } } } else { if (__VERIFIER_nondet_bool()) { if (n < 60) { n++; } else { __VERIFIER_assert(n == 60); n = 0; } } } } return 0; }