extern void abort(void); extern void __assert_fail(const char *, const char *, unsigned int, const char *) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__noreturn__)); void reach_error() { __assert_fail("0", "terminator_03-1.c", 3, "reach_error"); } void __VERIFIER_assert(int cond) { if (!(cond)) { ERROR: {reach_error();abort();} } return; } extern int __VERIFIER_nondet_int(); int main() { int x=__VERIFIER_nondet_int(); int y=__VERIFIER_nondet_int(); if (y>0) { while(x<100) { x=x+y; } } __VERIFIER_assert(y<=0 || (y<0 && x>=100)); return 0; }