extern void __VERIFIER_error() __attribute__ ((__noreturn__)); void __blast_assert() { ERROR: __VERIFIER_error(); } typedef struct Toplev { int a; struct Inner { int b; struct Innermost{ int c; } *y; } *x; } Stuff; int main() { struct Innermost im = {3}; struct Inner inner = {2, &im}; struct Toplev good = { 1, &inner}; struct Toplev *ptr = &good; ptr->x->y->c = 4; ((ptr->x->y->c == 4) ? (0) : __blast_assert ()); return 0; }