Test MP

Executions for behaviour: "1:r1=0 ; 1:r3=0"

Executions for behaviour: "1:r1=0 ; 1:r3=1"

Executions for behaviour: "1:r1=1 ; 1:r3=1"

PPC MP
{
0:r2=x; 0:r4=y;
1:r2=y; 1:r4=x;
}
 P0           | P1           ;
 li r1,1      | lwz r1,0(r2) ;
 stw r1,0(r2) | lwz r3,0(r4) ;
 li r3,1      |              ;
 stw r3,0(r4) |              ;
(* Was exists (1:r1=1 \/ 1:r3=0) *)
exists (1:r1=1 /\ 1:r3=1) \/ (1:r1=0 /\ 1:r3=0) \/  (1:r1=0 /\ 1:r3=1)