0.00/0.09
0.00/0.09 Abscon 112 (May, 2008)
0.19/0.24
0.19/0.24 configuration
0.19/0.24 name=mac.xml
0.27/0.33
0.27/0.33 instance
0.27/0.33 name=HOME/instance-1068236-1215152881.xml
0.27/0.37
0.27/0.37 domains being loaded...
0.27/0.37
0.27/0.37 variables being loaded...
0.38/0.45 nbVariables=272 nbDomainTypes=1 minDomainSize=26 maxDomainSize=26 nbTotalValues=7072
0.38/0.45 => wckTime=0.2 cpuTime=0.15 mem=8M894
0.38/0.45
0.38/0.45 relations being loaded...
0.48/0.56
0.48/0.56 constraints being loaded...
0.57/0.61 Too large in ConstraintConflictsSTructure
0.57/0.63 Too large in ConstraintConflictsSTructure
0.67/0.71 nbConstraints=33 nbRelationTypes=2 nbGlobalConstraints=33 nbExtensionStructures=2
0.67/0.71 nbSharedExtensionStructures=31 nbUnbuiltConflictsStructures=2 nbSharedBinaryRepresentations=0 minDegree=2
0.67/0.71 maxDegree=2 minArity=16 avgArity=16.48 maxArity=17 nbGenerators=0 nbFusions=0 symmetryWckTime=0.07
0.67/0.71 symmetryCpuTime=0.05
0.67/0.71 => wckTime=0.46 cpuTime=0.33 mem=17M768
0.67/0.77
0.67/0.77 solver IterativeSystematicSolver being built...
0.76/0.85
0.76/0.85 INFO : Forward propagation technique limited
0.87/0.93 => wckTime=0.687 cpuTime=0.46 mem=22M800
0.97/1.02
0.97/1.02 preprocessing
0.97/1.02 nbConstraintChecks=0 nbValidityChecks=455100 nbPropagations=322 nbRevisions=0 nbUselessRevisions=0
0.97/1.02 nbRemovedValues=780 detectedInconsistency=no
0.97/1.02 => wckTime=0.081 cpuTime=0.07 mem=22M800
2.55/2.65
2.55/2.65 search
2.55/2.65 run=5 nbConstraintChecks=0 nbValidityChecks=9648702 minDepth=0 maxDepth=3 nbPropagations=55299 nbRevisions=0
2.55/2.65 nbUselessRevisions=0 nbAssignments=207 nbFailedAssignments=147 nbBacktracks=53 nbVisitedNodes=401
2.55/2.65 nbRestartNogoods=35 mapSize=52 nbInferences=0 nbTooLargeKeys=0 nbSEliminables=0 nbREliminables=4.78
2.55/2.65 nbIEliminables=255.02 nbDEliminables=0 nbPEliminables=0
2.55/2.65 => wckTime=1.705 cpuTime=1.65 mem=23M808
2.55/2.65
2.55/2.65 global
2.55/2.65 nbConstraintChecks=0 nbValidityChecks=10103802 nbPropagations=55621 nbRestartNogoods=35 solvingWckTime=1.708
2.55/2.65 solvingCpuTime=1.65 expiredTime=no totalExploration=yes nbFoundSolutions=0 globalCpuTime=2.17
2.55/2.65 => wckTime=2.399 cpuTime=2.11 mem=23M808
2.55/2.65
2.55/2.65 s UNSATISFIABLE
2.55/2.65 d NODES 207
2.55/2.65 d CHECKS 0
2.55/2.65
2.55/2.65 totalWckTime=2.457 totalCpuTime=2.17
runsolver version 3.2.5 (c) roussel@cril.univ-artois.fr
command line: /home/evaluation/evaluation/pub/bin/runsolver --timestamp -w /tmp/evaluation-result-1068236-1215152881/watcher-1068236-1215152881 -o /tmp/evaluation-result-1068236-1215152881/solver-1068236-1215152881 -C 1800 -W 2200 -M 900 --output-limit 1,15 java -Xms756M -Xmx756M -XX:PermSize=10m -XX:MaxPermSize=10m -cp abscon112V4.jar abscon.Resolution mac.xml 1 XSax HOME/instance-1068236-1215152881.xml
Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 1800 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 1830 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 2200 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 921600 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 972800 KiB
Solver output will be limited to a maximum of 15728640 bytes. The first 1048576 bytes and the last 14680064 bytes will be preserved
Current StackSize limit: 10240 KiB
[startup+0 s]
/proc/loadavg: 1.93 1.98 1.99 3/74 7705
/proc/meminfo: memFree=1601764/2055920 swapFree=4179816/4192956
[pid=7705] ppid=7703 vsize=18572 CPUtime=0
/proc/7705/stat : 7705 (runsolver) R 7703 7705 7641 0 -1 4194368 16 0 0 0 0 0 0 0 18 0 1 0 1994260456 19017728 292 996147200 4194304 4296836 548682068352 18446744073709551615 258939088167 0 2147483391 4096 24578 0 0 0 17 1 0 0
/proc/7705/statm: 4643 292 257 25 0 2626 0
[startup+0.00758011 s]
/proc/loadavg: 1.93 1.98 1.99 3/74 7705
/proc/meminfo: memFree=1601764/2055920 swapFree=4179816/4192956
[pid=7705] ppid=7703 vsize=152 CPUtime=0
/proc/7705/stat : 7705 (java) D 7703 7705 7641 0 -1 0 41 0 0 0 0 0 0 0 18 0 1 0 1994260456 155648 26 996147200 134512640 134550740 4294956144 18446744073709551615 4727588 0 2147483391 4096 0 18446744072099781622 0 0 17 1 0 0
/proc/7705/statm: 38 26 19 9 0 4 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 152
[startup+0.103598 s]
/proc/loadavg: 1.93 1.98 1.99 3/74 7705
/proc/meminfo: memFree=1601764/2055920 swapFree=4179816/4192956
[pid=7705] ppid=7703 vsize=865884 CPUtime=0.08
/proc/7705/stat : 7705 (java) S 7703 7705 7641 0 -1 0 3676 0 1 0 6 2 0 0 18 0 9 0 1994260456 886665216 3151 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 1 0 0
/proc/7705/statm: 216471 3151 1676 9 0 211026 0
Current children cumulated CPU time (s) 0.08
Current children cumulated vsize (KiB) 865884
[startup+0.301641 s]
/proc/loadavg: 1.93 1.98 1.99 3/74 7705
/proc/meminfo: memFree=1601764/2055920 swapFree=4179816/4192956
[pid=7705] ppid=7703 vsize=866048 CPUtime=0.27
/proc/7705/stat : 7705 (java) S 7703 7705 7641 0 -1 0 5528 0 1 0 23 4 0 0 18 0 9 0 1994260456 886833152 4951 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 1 0 0
/proc/7705/statm: 216512 4951 1883 9 0 211060 0
Current children cumulated CPU time (s) 0.27
Current children cumulated vsize (KiB) 866048
[startup+0.701707 s]
/proc/loadavg: 1.93 1.98 1.99 3/74 7705
/proc/meminfo: memFree=1601764/2055920 swapFree=4179816/4192956
[pid=7705] ppid=7703 vsize=867184 CPUtime=0.67
/proc/7705/stat : 7705 (java) S 7703 7705 7641 0 -1 0 9335 284 1 0 61 6 0 0 18 0 9 0 1994260456 887996416 7960 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 1 0 0
/proc/7705/statm: 216796 7960 1996 9 0 211324 0
Current children cumulated CPU time (s) 0.67
Current children cumulated vsize (KiB) 867184
[startup+1.50285 s]
/proc/loadavg: 1.93 1.98 1.99 3/83 7718
/proc/meminfo: memFree=1569308/2055920 swapFree=4179816/4192956
[pid=7705] ppid=7703 vsize=867272 CPUtime=1.46
/proc/7705/stat : 7705 (java) S 7703 7705 7641 0 -1 0 16863 284 1 0 137 9 0 0 18 0 9 0 1994260456 888086528 10903 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 1 0 0
/proc/7705/statm: 216818 10903 2632 9 0 211324 0
[pid=7705/tid=7707] ppid=7703 vsize=867272 CPUtime=1.19
/proc/7705/task/7707/stat : 7707 (java) R 7703 7705 7641 0 -1 64 12363 284 1 0 113 6 0 0 25 0 9 0 1994260458 888086528 10903 996147200 134512640 134550740 4294955984 18446744073709551615 4126803471 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7708] ppid=7703 vsize=867272 CPUtime=0.04
/proc/7705/task/7708/stat : 7708 (java) S 7703 7705 7641 0 -1 64 3101 284 0 0 4 0 0 0 16 0 9 0 1994260459 888086528 10903 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 0 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7709] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7709/stat : 7709 (java) S 7703 7705 7641 0 -1 64 13 284 0 0 0 0 0 0 16 0 9 0 1994260459 888086528 10903 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7710] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7710/stat : 7710 (java) S 7703 7705 7641 0 -1 64 8 284 0 0 0 0 0 0 15 0 9 0 1994260459 888086528 10903 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7711] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7711/stat : 7711 (java) S 7703 7705 7641 0 -1 64 1 284 0 0 0 0 0 0 18 0 9 0 1994260462 888086528 10903 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7712] ppid=7703 vsize=867272 CPUtime=0.18
/proc/7705/task/7712/stat : 7712 (java) S 7703 7705 7641 0 -1 64 552 284 0 0 18 0 0 0 16 0 9 0 1994260462 888086528 10903 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7713] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7713/stat : 7713 (java) S 7703 7705 7641 0 -1 64 2 284 0 0 0 0 0 0 19 0 9 0 1994260462 888086528 10903 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7714] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7714/stat : 7714 (java) S 7703 7705 7641 0 -1 64 8 284 0 0 0 0 0 0 15 0 9 0 1994260462 888086528 10903 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
Current children cumulated CPU time (s) 1.46
Current children cumulated vsize (KiB) 867272
Solver just ended. Dumping a history of the last processes samples
[startup+2.303 s]
/proc/loadavg: 1.93 1.98 1.99 3/83 7718
/proc/meminfo: memFree=1567964/2055920 swapFree=4179816/4192956
[pid=7705] ppid=7703 vsize=867272 CPUtime=2.25
/proc/7705/stat : 7705 (java) S 7703 7705 7641 0 -1 0 16870 284 1 0 216 9 0 0 18 0 9 0 1994260456 888086528 10909 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 1 0 0
/proc/7705/statm: 216818 10909 2632 9 0 211324 0
[pid=7705/tid=7707] ppid=7703 vsize=867272 CPUtime=1.99
/proc/7705/task/7707/stat : 7707 (java) R 7703 7705 7641 0 -1 64 12367 284 1 0 192 7 0 0 25 0 9 0 1994260458 888086528 10909 996147200 134512640 134550740 4294955984 18446744073709551615 4126838478 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7708] ppid=7703 vsize=867272 CPUtime=0.04
/proc/7705/task/7708/stat : 7708 (java) S 7703 7705 7641 0 -1 64 3101 284 0 0 4 0 0 0 17 0 9 0 1994260459 888086528 10909 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 0 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7709] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7709/stat : 7709 (java) S 7703 7705 7641 0 -1 64 13 284 0 0 0 0 0 0 16 0 9 0 1994260459 888086528 10909 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7710] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7710/stat : 7710 (java) S 7703 7705 7641 0 -1 64 8 284 0 0 0 0 0 0 15 0 9 0 1994260459 888086528 10909 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7711] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7711/stat : 7711 (java) S 7703 7705 7641 0 -1 64 1 284 0 0 0 0 0 0 18 0 9 0 1994260462 888086528 10909 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7712] ppid=7703 vsize=867272 CPUtime=0.19
/proc/7705/task/7712/stat : 7712 (java) S 7703 7705 7641 0 -1 64 555 284 0 0 19 0 0 0 15 0 9 0 1994260462 888086528 10909 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7713] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7713/stat : 7713 (java) S 7703 7705 7641 0 -1 64 2 284 0 0 0 0 0 0 19 0 9 0 1994260462 888086528 10909 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7714] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7714/stat : 7714 (java) S 7703 7705 7641 0 -1 64 8 284 0 0 0 0 0 0 15 0 9 0 1994260462 888086528 10909 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
Current children cumulated CPU time (s) 2.25
Current children cumulated vsize (KiB) 867272
[startup+2.70106 s]
/proc/loadavg: 1.93 1.98 1.99 3/83 7718
/proc/meminfo: memFree=1567964/2055920 swapFree=4179816/4192956
[pid=7705] ppid=7703 vsize=867272 CPUtime=2.6
/proc/7705/stat : 7705 (java) S 7703 7705 7641 0 -1 0 16965 284 1 0 251 9 0 0 18 0 9 0 1994260456 888086528 11001 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 1 0 0
/proc/7705/statm: 216818 11001 2632 9 0 211324 0
[pid=7705/tid=7707] ppid=7703 vsize=867272 CPUtime=2.33
/proc/7705/task/7707/stat : 7707 (java) S 7703 7705 7641 0 -1 64 12460 284 1 0 226 7 0 0 25 0 9 0 1994260458 888086528 11001 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7708] ppid=7703 vsize=867272 CPUtime=0.04
/proc/7705/task/7708/stat : 7708 (java) S 7703 7705 7641 0 -1 64 3101 284 0 0 4 0 0 0 17 0 9 0 1994260459 888086528 11001 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 0 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7709] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7709/stat : 7709 (java) S 7703 7705 7641 0 -1 64 13 284 0 0 0 0 0 0 16 0 9 0 1994260459 888086528 11001 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7710] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7710/stat : 7710 (java) S 7703 7705 7641 0 -1 64 8 284 0 0 0 0 0 0 15 0 9 0 1994260459 888086528 11001 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7711] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7711/stat : 7711 (java) S 7703 7705 7641 0 -1 64 1 284 0 0 0 0 0 0 18 0 9 0 1994260462 888086528 11001 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7712] ppid=7703 vsize=867272 CPUtime=0.19
/proc/7705/task/7712/stat : 7712 (java) S 7703 7705 7641 0 -1 64 557 284 0 0 19 0 0 0 15 0 9 0 1994260462 888086528 11001 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7713] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7713/stat : 7713 (java) S 7703 7705 7641 0 -1 64 2 284 0 0 0 0 0 0 19 0 9 0 1994260462 888086528 11001 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
[pid=7705/tid=7714] ppid=7703 vsize=867272 CPUtime=0
/proc/7705/task/7714/stat : 7714 (java) S 7703 7705 7641 0 -1 64 8 284 0 0 0 0 0 0 15 0 9 0 1994260462 888086528 11001 996147200 134512640 134550740 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
Current children cumulated CPU time (s) 2.6
Current children cumulated vsize (KiB) 867272
Child status: 0
Real time (s): 2.7141
CPU time (s): 2.6256
CPU user time (s): 2.51862
CPU system time (s): 0.106983
CPU usage (%): 96.7391
Max. virtual memory (cumulated for all children) (KiB): 867272
getrusage(RUSAGE_CHILDREN,...) data:
user time used= 2.51862
system time used= 0.106983
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 17276
page faults= 1
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 851
involuntary context switches= 872
runsolver used 0.003999 second user time and 0.018997 second system time
The end
Begin job on node45 at 2008-07-04 08:28:01
IDJOB=1068236
IDBENCH=55505
IDSOLVER=363
FILE ID=node45/1068236-1215152881
PBS_JOBID= 7877463
Free space on /tmp= 66504 MiB
SOLVER NAME= Abscon 112v4 AC
BENCH NAME= CPAI08/csp/ukVg/normalized-crossword-m1c-uk-vg16-17_ext.xml
COMMAND LINE= java -Xms756M -Xmx756M -XX:PermSize=10m -XX:MaxPermSize=10m -cp abscon112V4.jar abscon.Resolution mac.xml 1 XSax BENCHNAME
RUNSOLVER COMMAND LINE= /home/evaluation/evaluation/pub/bin/runsolver --timestamp -w /tmp/evaluation-result-1068236-1215152881/watcher-1068236-1215152881 -o /tmp/evaluation-result-1068236-1215152881/solver-1068236-1215152881 -C 1800 -W 2200 -M 900 --output-limit 1,15 java -Xms756M -Xmx756M -XX:PermSize=10m -XX:MaxPermSize=10m -cp abscon112V4.jar abscon.Resolution mac.xml 1 XSax HOME/instance-1068236-1215152881.xml
TIME LIMIT= 1800 seconds
MEMORY LIMIT= 900 MiB
MD5SUM BENCH= da2ac26052baa9f2c530f67d033b239f
RANDOM SEED=2062135654
node45.alineos.net Linux 2.6.9-22.EL.rootsmp #1 SMP Mon Oct 3 08:59:52 CEST 2005
/proc/cpuinfo:
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz
stepping : 3
cpu MHz : 3000.268
cache size : 2048 KB
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl cid cx16 xtpr
bogomips : 5914.62
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz
stepping : 3
cpu MHz : 3000.268
cache size : 2048 KB
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl cid cx16 xtpr
bogomips : 5586.94
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:
/proc/meminfo:
MemTotal: 2055920 kB
MemFree: 1602244 kB
Buffers: 20080 kB
Cached: 163456 kB
SwapCached: 7136 kB
Active: 357984 kB
Inactive: 40256 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 2055920 kB
LowFree: 1602244 kB
SwapTotal: 4192956 kB
SwapFree: 4179816 kB
Dirty: 2476 kB
Writeback: 0 kB
Mapped: 221536 kB
Slab: 40384 kB
Committed_AS: 3925264 kB
PageTables: 2196 kB
VmallocTotal: 536870911 kB
VmallocUsed: 264952 kB
VmallocChunk: 536605679 kB
HugePages_Total: 0
HugePages_Free: 0
Hugepagesize: 2048 kB
Free space on /tmp at the end= 66504 MiB
End job on node45 at 2008-07-04 08:28:04