1C CoRR+poonceonce+Once 2 3(* 4 * Result: Never 5 * 6 * Test of read-read coherence, that is, whether or not two successive 7 * reads from the same variable are ordered. 8 *) 9 10{} 11 12P0(int *x) 13{ 14 WRITE_ONCE(*x, 1); 15} 16 17P1(int *x) 18{ 19 int r0; 20 int r1; 21 22 r0 = READ_ONCE(*x); 23 r1 = READ_ONCE(*x); 24} 25 26exists (1:r0=1 /\ 1:r1=0) 27