Test IRIW+poacquireacquire+poacquireonce+OnceRelease

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