LISA auto/LB-LRW+O-O+OB-O+OB-OB (* * Result: Sometimes * P0 LRW,O: Never->Sometimes: No ordering * P0-P1 rf O-O: Note lack of C11 guarantee, no synchronizes-with *) { } P0 | P1 | P2 | P3 ; r[once] r1 u0 | r[once] r1 x1 | r[once] r1 x2 | r[once] r1 x3 ; w[once] x1 1 | f[mb] | f[mb] | f[mb] ; | w[once] x2 1 | w[once] x3 1 | w[once] u0 1 ; Observed 3:r1=1; 2:r1=1; 1:r1=1; 0:r1=1;