C CoWR+poonceonce+Once

{}

P0(int *x)
{
	int r0;

	WRITE_ONCE(*x, 1);
	r0 = READ_ONCE(*x);
}

P1(int *x)
{
	WRITE_ONCE(*x, 2);
}

exists (x=1 /\ 0:r0=2)