GPU_PTX 2+2W+membar.cta+po-p0:p1-xsyg
"Mcta-d-Ws-Wg Ws-w-g Po-d-Wg-Ws Ws-w-s"

{}

 P0                 | P1                 ;
 mov.s32 r0, 2      | mov.s32 r0, 2      ;
 st.cg.s32 [r1], r0 | st.cg.s32 [r1], r0 ;
 membar.cta         | mov.s32 r2, 1      ;
 mov.s32 r2, 1      | st.cg.s32 [r3], r2 ;
 st.cg.s32 [r3], r2 |                    ;

exists (0::x=2 /\ 0::y=2)
(device (kernel (cta (warp P0) (warp P1))))
x:local; y:global
Generated assembler
//START _litmus_P1
	mov.s32 sr01, 2 ;
	st.cg.s32 [sr11], sr01 ;
	mov.s32 sr21, 1 ;
	st.cg.s32 [sr31], sr21 ;
//START _litmus_P0
	mov.s32 sr00, 2 ;
	st.cg.s32 [sr10], sr00 ;
	membar.cta ;
	mov.s32 sr20, 1 ;
	st.cg.s32 [sr30], sr20 ;

Binary '/tmp/dir4b6c1f.tmp/2+2W+membar.cta+po-p0:p1-xsyg-0.exe' successfully loaded
Specification clusters: 2
Specification: [[(657, 2, 'R10'), (659, 2, 'R12')], [(729, 2, 'R10'), (731, 2, 'R12')]]
Cluster 0: OK
Cluster 1: OK
!!SUCCESS!!
Test 2+2W+membar.cta+po-p0:p1-xsyg Allowed
Histogram (4 states)
16407 :>0::x=1; 0::y=1;
29165 :>0::x=2; 0::y=1;
4353  :>0::x=1; 0::y=2;
75    *>0::x=2; 0::y=2;
Ok

Witnesses
Positive: 75, Negative: 49925
Condition exists (0::x=2 /\ 0::y=2) is validated
Observation 2+2W+membar.cta+po-p0:p1-xsyg Sometimes 75 49925
Time 2+2W+membar.cta+po-p0:p1-xsyg 3.21

  -- device info --
Name:                           GeForce GTX 750 Ti
Major revision number:          5
Minor revision number:          0
Total global memory:            2147287040
Total shared memory per block:  49152
Number of multiprocessors:      5

Machine: formal
Revision 1383, version 5.01 GPU_PTX experimental backend
Command line: ./litmus -mach GTX750.cfg -a 8 -gpu-verf-comp true big_bucket/2+2W+membar.cta+po-p0:p1-xsyg-0.litmus -s 50000
Parameters
#ifndef SIZE_OF_TEST
#define SIZE_OF_TEST 50000
#endif
#ifndef NUMBER_OF_RUN
#define NUMBER_OF_RUN 1
#endif
/* cc options: -arch=sm_50 */
/* barrier: user */
/* speedcheck: no */
/* gpu_general_bc: true */
/* gpu_mem_stress: true */
/* gpu-rand-threads: true */
/* gpu_cuda: true */
/* gpu_gen_addr: true */
/* gpu_cvt_global_to_gen: true */
/* gpu_cvt_shared_to_gen: true */
/* gpu_max_ctas: 5 */
/* gpu_min_ctas: 4 */
/* gpu_max_threads: 256 */
/* gpu_min_threads: 128 */