GPU_PTX cas_sl+membar.gls-p0::p1-xgyg

{y=1;}

 P0                        | P1                          ;
 mov.u32 r0, 1             | atom.cas.b32 r0, [r1], 0, 1 ;
 st.cg.u32 [r1], r0        | setp.eq.u32 r4, r0, 0       ;
 membar.gl                 | @r4 membar.gl               ;
 atom.exch.b32 r2, [r3], 0 | @r4 ld.cg.u32 r2, [r3]      ;

exists (1:r0=0 /\ 1:r2=0)
(device (kernel (cta (warp P0)) (cta (warp P1))))
y:global; x:global
Generated assembler
//START _litmus_P1
	atom.cas.b32 sr01, [sr11], 0, 1 ;
	setp.eq.u32 sr41, sr01, 0 ;
	@sr41 membar.gl ;
	@sr41 ld.cg.u32 sr21, [sr31] ;
//START _litmus_P0
	mov.u32 sr00, 1 ;
	st.cg.u32 [sr10], sr00 ;
	membar.gl ;
	atom.exch.b32 sr20, [sr30], 0 ;

Binary '/tmp/dir6aa0d7.tmp/cas-sl+membar.gls.exe' successfully loaded
Specification clusters: 2
Specification: [[(689, 6, 'R4'), (692, 3, 'R0')], [(745, 2, 'R8'), (744, 7, 'R0')]]
Cluster 0: OK
Cluster 1: OK
!!SUCCESS!!
Test cas-sl+membar.gls Allowed
Histogram (2 states)
153   :>1:r0=0; 1:r2=1;
99852 :>1:r0=1; 1:r2=1;
No

Witnesses
Positive: 0, Negative: 100005
Condition exists (1:r0=0 /\ 1:r2=0) is NOT validated
Observation cas-sl+membar.gls Never 0 100005
Time cas-sl+membar.gls 12.15

  -- device info --
Name:                           Tesla C2075
Major revision number:          2
Minor revision number:          0
Total global memory:            5636554752
Total shared memory per block:  49152
Number of multiprocessors:      14

Machine: fractus
Revision 1365M, version 5.01 GPU_PTX experimental backend
Command line: ./litmus -mach TeslaC2075.cfg -gpu-verf-comp true ASPLOS/cas-sl+membar.gls.litmus -gpu-general-bc false
Parameters
#ifndef SIZE_OF_TEST
#define SIZE_OF_TEST 100000
#endif
#ifndef NUMBER_OF_RUN
#define NUMBER_OF_RUN 1
#endif
/* cc options: -arch=sm_20 */
/* barrier: user */
/* speedcheck: no */
/* gpu_general_bc: false */
/* 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: 12 */
/* gpu_min_ctas: 9 */
/* gpu_max_threads: 512 */
/* gpu_min_threads: 128 */