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C MP+poonceonces
(*
* Result: Sometimes
*
* Can the counter-intuitive message-passing outcome be prevented with
* no ordering at all?
*)
{}
P0(int *x, int *y)
{
WRITE_ONCE(*x, 1);
WRITE_ONCE(*y, 1);
}
P1(int *x, int *y)
{
int r0;
int r1;
r0 = READ_ONCE(*y);
r1 = READ_ONCE(*x);
}
exists (1:r0=1 /\ 1:r1=0)
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