// 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", "mine-tutorial-ex4.10.c", 3, __extension__ __PRETTY_FUNCTION__); })); } void __VERIFIER_assert(int cond) //@ requires (cond != 0); //@ ensures (cond != 0); { if(!(cond)) { ERROR: {reach_error();abort();} } } int main() //@ requires module(mine2017_ex4_10__verifast_instrumented_modified, true); //@ ensures junk(); { int v = 1; while (v <= 50)//@ invariant ((1 <= v) && (v <= 52)); { __VERIFIER_assert(1 <= v); v += 2; __VERIFIER_assert(v <= 52); } __VERIFIER_assert(51 <= v); __VERIFIER_assert(v <= 52); return 0; }