Test alt-ww-rw+rel+acq-o+o-rel+acq-o+o-wb-rel+acq-o

LISA alt-ww-rw+rel+acq-o+o-rel+acq-o+o-wb-rel+acq-o 
{
x = 0;
y = 0;
}
 P0             | P1              | P2             | P3              | P4             | P5              ;
 w[release] x 1 | r[acquire] r1 x | w[once] y 2    | r[acquire] r2 z | w[once] a 2    | r[acquire] r3 c ;
                |                 |                |                 | f[wmb]         |                 ;
                | w[once] y 1     | w[release] z 1 | w[once] a 1     | w[release] c 1 | w[once] x 2     ;
Observed
    y=2; x=2; a=2; 5:r3=1; 3:r2=1; 1:r1=2;
and y=2; x=1; a=2; 5:r3=1; 3:r2=1; 1:r1=2;
and y=2; x=1; a=2; 5:r3=1; 3:r2=1; 1:r1=1;