extern void __VERIFIER_error() __attribute__ ((__noreturn__)); void __VERIFIER_assert(int cond) { if (!(cond)) { ERROR: __VERIFIER_error(); } return; } int main() { double x = 1.0; double x1 = x/2.5; while(x1 != x) { x = x1; x1 = x/2.5; } __VERIFIER_assert(x == 0); return 0; }