6 * Starting with a two-process release-acquire chain ordering P0()'s
7 * first store against P1()'s final load, if the smp_store_release()
8 * is replaced by WRITE_ONCE() and the smp_load_acquire() replaced by
9 * READ_ONCE(), is ordering preserved?
31 exists (x=2 /\ 1:r0=1)