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C CoRW+poonceonce+Once
(*
* Result: Never
*
* Test of read-write coherence, that is, whether or not a read from
* a given variable and a later write to that same variable are ordered.
*)
{}
P0(int *x)
{
int r0;
r0 = READ_ONCE(*x);
WRITE_ONCE(*x, 1);
}
P1(int *x)
{
WRITE_ONCE(*x, 2);
}
exists (x=2 /\ 0:r0=2)
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