Test IRIW+poacquireonce+poacquireacquire+OnceRelease

LISA IRIW+poacquireonce+poacquireacquire+OnceRelease
"RfeOnceAcquire PodRRAcquireOnce FreOnceRelease RfeReleaseAcquire PodRRAcquireAcquire FreAcquireOnce"
Cycle=PodRRAcquireAcquire FreAcquireOnce RfeOnceAcquire PodRRAcquireOnce FreOnceRelease RfeReleaseAcquire
Relax=FreAcquireOnce RfeOnceAcquire FreOnceRelease RfeReleaseAcquire
Safe=PodRRAcquireAcquire PodRRAcquireOnce
Prefetch=1:x=F,1:y=T,3:y=F,3:x=T
Com=Rf Fr Rf Fr
Orig=RfeOnceAcquire PodRRAcquireOnce FreOnceRelease RfeReleaseAcquire PodRRAcquireAcquire FreAcquireOnce
{
}
 P0          | P1              | P2             | P3              ;
 w[once] x 1 | r[acquire] r0 x | w[release] y 1 | r[acquire] r0 y ;
             | r[once] r1 y    |                | r[acquire] r1 x ;
Observed
    3:r1=0; 3:r0=1; 1:r1=0; 1:r0=1;