Test IRRWIW+poacquireacquire+poacquireonce+OnceRelease

LISA IRRWIW+poacquireacquire+poacquireonce+OnceRelease
"RfeOnceAcquire PodRRAcquireAcquire FreAcquireRelease RfeReleaseAcquire PodRWAcquireOnce WseOnceOnce"
Cycle=PodRRAcquireAcquire FreAcquireRelease RfeReleaseAcquire PodRWAcquireOnce WseOnceOnce RfeOnceAcquire
Relax=FreAcquireRelease RfeOnceAcquire RfeReleaseAcquire
Safe=PodRRAcquireAcquire PodRWAcquireOnce WseOnceOnce
Prefetch=1:x=F,1:y=T,3:y=F,3:x=W
Com=Rf Fr Rf Ws
Orig=RfeOnceAcquire PodRRAcquireAcquire FreAcquireRelease RfeReleaseAcquire PodRWAcquireOnce WseOnceOnce
{
}
 P0          | P1              | P2             | P3              ;
 w[once] x 2 | r[acquire] r0 x | w[release] y 1 | r[acquire] r0 y ;
             | r[acquire] r1 y |                | w[once] x 1     ;
Observed
    x=2; 3:r0=1; 1:r1=0; 1:r0=1;
and x=1; 3:r0=1; 1:r1=0; 1:r0=1;