Trace number 3280195

Some explanations

A solver is run under the control of another program named runsolver. runsolver is in charge of imposing the CPU time limit and the memory limit to the solver. It also monitors some information about the process. The trace of the execution of a solver is divided into four (or five) parts:
  1. SOLVER DATA
    This is the output of the solver (stdout and stderr).
    Note that some very long lines in this section may be truncated by your web browser ! In such a case, you may want to use the "Download as text" link to get the trace as a text file.

    When the --timestamp option is passed to the runsolver program, each line output by the solver is prepended with a timestamp which indicates at what time the line was output by the solver. Times are relative to the start of the program, given in seconds. The first timestamp (if present) is estimated CPU time. The last timestamp is wall clock time.

    As some 'v lines' may be very long (sometimes several megabytes), the 'v line' output by your solver may be split on several lines to help limit the size of the trace recorded in the database. In any case, the exact output of your solver is preserved in a trace file.
  2. VERIFIER DATA
    The output of the solver is piped to a verifier program which will search a value line "v " and, if found, will check that the given interpretation satisfies all constraints.
  3. CONVERSION SCRIPT DATA (Optionnal)
    When a conversion script is used, this section shows the messages that were output by the conversion script.
  4. WATCHER DATA
    This is the informations gathered by the runsolver program. It first prints the different limits. There's a first limit on CPU time set to X seconds (see the parameters in the trace). After this time has ellapsed, runsolver sends a SIGTERM and 2 seconds later a SIGKILL to the solver. For safety, there's also another limit set to X+30 seconds which will send a SIGXPU to the solver. The last limit is on the virtual memory used by the process (see the parameters in the trace).
    Every ten seconds, the runsolver process fetches the content of /proc/loadavg, /proc/pid/stat and /proc/pid/statm (see man proc) and prints it as raw data. This is only recorded in case we need to investigate the behaviour of a solver. The memory used by the solver (vsize) is also given every ten seconds.
    When the solver exits, runsolver prints some informations such as status and time. CPU usage is the ratio CPU Time/Real Time.
  5. LAUNCHER DATA
    These informations are related to the script which will launch the solver. The most important informations are the command line given to the solver, the md5sum of the different files and the dump of the /proc/cpuinfo and /proc/meminfo which provides some useful information on the computer.

Solver answer on this benchmark

Solver NameAnswerCPU timeWall clock time
rcl 2011-04-01? (TO) 1299.97 1300.01

General information on the benchmark

Nameindustrial/anbulagan/
hard-sat/partial-10-15-s.cnf
MD5SUMa6b04ec2cace5c4e6bef212c7f2df796
Bench CategoryAPPLICATION (applications instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark29.9874
Satisfiable
(Un)Satisfiability was proved
Number of variables261020
Number of clauses1211106
Sum of the clauses size2788072
Maximum clause length10
Minimum clause length1
Number of clauses of size 119537
Number of clauses of size 2952032
Number of clauses of size 3190917
Number of clauses of size 45400
Number of clauses of size 521600
Number of clauses of size over 521620

Solver Data

0.00/0.00	c Parsing...
0.00/0.47	c ==============================================================================
0.00/0.47	c |           |     ORIGINAL     |              LEARNT              |          |
0.00/0.47	c | Conflicts | Clauses Literals |   Limit Clauses Literals  Lit/Cl | Progress |
0.00/0.47	c ==============================================================================
0.00/0.47	c |         0 | 1190271  2765804 |  357081       0        0     nan |  0.000 % |
3.39/3.47	c |         0 |  708950  1938523 |      --       0       --      -- |     --   | -211920/-216212
3.39/3.47	c ==============================================================================
3.39/3.47	c Result  :   #vars: 124771   #clauses: 708950   #literals: 1938523
3.39/3.47	c CPU time:   3.36549 s
3.39/3.47	c ==============================================================================

Verifier Data

ERROR: Unexpected answer ! (SATISFIABLE/UNSATISFIABLE expected)
Got answer: <no 's ' line found>

Watcher Data

runsolver Copyright (C) 2010-2011 Olivier ROUSSEL

This is runsolver version 3.3.0 (svn: 935)

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

command line: BIN/runsolver --timestamp -w /tmp/evaluation-result-3280195-1303746818/watcher-3280195-1303746818 -o /tmp/evaluation-result-3280195-1303746818/solver-3280195-1303746818 -C 2400 -W 1300 -M 7680 ./esg_static.sh HOME/instance-3280195-1303746818.cnf 

running on 2 cores: 1,3

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 2400 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 2430 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 1300 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 7864320 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 7915520 KiB
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 0.16 0.03 0.01 3/186 5920
/proc/meminfo: memFree=24763832/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=0 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 328 0 0 0 0 0 0 0 21 0 1 0 564912394 8908800 249 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 249 209 178 0 68 0

[startup+0.032525 s]
/proc/loadavg: 0.16 0.03 0.01 3/186 5920
/proc/meminfo: memFree=24763832/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=0 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 328 0 0 0 0 0 0 0 21 0 1 0 564912394 8908800 249 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 249 209 178 0 68 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 8700

[startup+0.100515 s]
/proc/loadavg: 0.16 0.03 0.01 3/186 5920
/proc/meminfo: memFree=24763832/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=0 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 328 0 0 0 0 0 0 0 21 0 1 0 564912394 8908800 249 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 249 209 178 0 68 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 8700

[startup+0.300473 s]
/proc/loadavg: 0.16 0.03 0.01 3/186 5920
/proc/meminfo: memFree=24763832/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=0 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 328 0 0 0 0 0 0 0 21 0 1 0 564912394 8908800 249 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 249 209 178 0 68 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 8700

[startup+0.700402 s]
/proc/loadavg: 0.16 0.03 0.01 3/186 5920
/proc/meminfo: memFree=24763832/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=0 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 328 0 0 0 0 0 0 0 21 0 1 0 564912394 8908800 249 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 249 209 178 0 68 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 8700

[startup+1.50025 s]
/proc/loadavg: 0.16 0.03 0.01 4/188 5925
/proc/meminfo: memFree=24595536/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=0 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 328 0 0 0 0 0 0 0 21 0 1 0 564912394 8908800 249 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 249 209 178 0 68 0
[pid=5921] ppid=5920 vsize=140020 CPUtime=1.49 cores=1,3
/proc/5921/stat : 5921 (SatELite_releas) R 5920 5920 5867 0 -1 4202496 34580 0 0 0 141 8 0 0 25 0 1 0 564912395 143380480 31662 33554432000 134512640 135144242 4290707744 18446744073709551615 134585745 0 0 4096 3 0 0 0 17 1 0 0 0
/proc/5921/statm: 35005 31662 77 155 0 34848 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 148720

[startup+3.10096 s]
/proc/loadavg: 0.16 0.03 0.01 5/190 5927
/proc/meminfo: memFree=24548712/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=0 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 328 0 0 0 0 0 0 0 21 0 1 0 564912394 8908800 249 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 249 209 178 0 68 0
[pid=5921] ppid=5920 vsize=157064 CPUtime=3.09 cores=1,3
/proc/5921/stat : 5921 (SatELite_releas) R 5920 5920 5867 0 -1 4202496 41416 0 0 0 300 9 0 0 25 0 1 0 564912395 160833536 34737 33554432000 134512640 135144242 4290707744 18446744073709551615 134588216 0 0 4096 3 0 0 0 17 1 0 0 0
/proc/5921/statm: 39266 34737 77 155 0 39109 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 165764

[startup+6.30036 s]
/proc/loadavg: 0.47 0.10 0.03 5/194 5936
/proc/meminfo: memFree=24563788/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=59156 CPUtime=2.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 12670 0 0 0 240 4 0 0 25 0 1 0 564912779 60575744 12578 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208438 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 14789 12578 131 6 0 13259 0
Current children cumulated CPU time (s) 6.27
Current children cumulated vsize (KiB) 67856

[startup+12.7012 s]
/proc/loadavg: 0.75 0.16 0.05 5/194 5937
/proc/meminfo: memFree=24610776/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=63184 CPUtime=8.84 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 13671 0 0 0 880 4 0 0 25 0 1 0 564912779 64700416 13578 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208400 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 15796 13578 131 6 0 14266 0
Current children cumulated CPU time (s) 12.67
Current children cumulated vsize (KiB) 71884

[startup+25.5008 s]
/proc/loadavg: 1.47 0.35 0.12 5/194 5938
/proc/meminfo: memFree=24598252/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=70488 CPUtime=21.64 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 15511 0 0 0 2158 6 0 0 25 0 1 0 564912779 72179712 15418 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208446 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 17622 15418 131 6 0 16092 0
Current children cumulated CPU time (s) 25.47
Current children cumulated vsize (KiB) 79188

[startup+51.101 s]
/proc/loadavg: 2.33 0.64 0.22 5/194 5968
/proc/meminfo: memFree=24528272/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=75264 CPUtime=47.24 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 16712 0 0 0 4718 6 0 0 25 0 1 0 564912779 77070336 16619 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208446 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 18816 16619 131 6 0 17286 0
Current children cumulated CPU time (s) 51.07
Current children cumulated vsize (KiB) 83964

[startup+102.307 s]
/proc/loadavg: 3.27 1.16 0.41 5/194 5970
/proc/meminfo: memFree=24498304/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=82420 CPUtime=98.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 18507 0 0 0 9837 7 0 0 25 0 1 0 564912779 84398080 18414 33554432000 4194304 4218580 140735818124112 18446744073709551615 4210077 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 20605 18414 131 6 0 19075 0
Current children cumulated CPU time (s) 102.27
Current children cumulated vsize (KiB) 91120

[startup+162.3 s]
/proc/loadavg: 3.81 1.69 0.64 5/194 5971
/proc/meminfo: memFree=24448388/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=100716 CPUtime=158.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 23074 0 0 0 15835 9 0 0 25 0 1 0 564912779 103133184 22981 33554432000 4194304 4218580 140735818124112 18446744073709551615 4210037 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 25179 22981 131 6 0 23649 0
Current children cumulated CPU time (s) 162.27
Current children cumulated vsize (KiB) 109416

[startup+222.301 s]
/proc/loadavg: 3.93 2.11 0.85 5/194 5973
/proc/meminfo: memFree=24414144/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=109036 CPUtime=218.43 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 25151 0 0 0 21834 9 0 0 25 0 1 0 564912779 111652864 25058 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208384 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 27259 25058 131 6 0 25729 0
Current children cumulated CPU time (s) 222.26
Current children cumulated vsize (KiB) 117736

[startup+282.301 s]
/proc/loadavg: 3.97 2.45 1.04 5/194 5974
/proc/meminfo: memFree=24413612/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=109068 CPUtime=278.43 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 25160 0 0 0 27834 9 0 0 25 0 1 0 564912779 111685632 25066 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208186 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 27267 25066 131 6 0 25737 0
Current children cumulated CPU time (s) 282.26
Current children cumulated vsize (KiB) 117768

[startup+342.301 s]
/proc/loadavg: 3.99 2.73 1.22 5/194 5976
/proc/meminfo: memFree=24402064/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=117620 CPUtime=338.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 27319 0 0 0 33834 10 0 0 25 0 1 0 564912779 120442880 27221 33554432000 4194304 4218580 140735818124112 18446744073709551615 4213479 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 29405 27221 131 6 0 27875 0
Current children cumulated CPU time (s) 342.27
Current children cumulated vsize (KiB) 126320

[startup+402.301 s]
/proc/loadavg: 4.05 2.97 1.40 5/194 5978
/proc/meminfo: memFree=24380356/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3

################
# More data... #
################

/proc/5935/statm: 32816 30613 131 6 0 31286 0
Current children cumulated CPU time (s) 582.27
Current children cumulated vsize (KiB) 139964

[startup+642.301 s]
/proc/loadavg: 4.01 3.54 1.99 6/194 5993
/proc/meminfo: memFree=24317792/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=140936 CPUtime=638.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 33197 0 0 0 63831 13 0 0 25 0 1 0 564912779 144318464 33057 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208446 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 35234 33057 131 6 0 33704 0
Current children cumulated CPU time (s) 642.27
Current children cumulated vsize (KiB) 149636

[startup+702.301 s]
/proc/loadavg: 4.06 3.64 2.12 5/194 5995
/proc/meminfo: memFree=24309088/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=140936 CPUtime=698.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 33219 0 0 0 69831 13 0 0 25 0 1 0 564912779 144318464 33063 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208164 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 35234 33063 131 6 0 33704 0
Current children cumulated CPU time (s) 702.27
Current children cumulated vsize (KiB) 149636

[startup+762.307 s]
/proc/loadavg: 4.02 3.70 2.23 5/194 5996
/proc/meminfo: memFree=24307560/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=140936 CPUtime=758.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 33239 0 0 0 75831 13 0 0 25 0 1 0 564912779 144318464 33064 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208186 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 35234 33064 131 6 0 33704 0
Current children cumulated CPU time (s) 762.27
Current children cumulated vsize (KiB) 149636

[startup+822.301 s]
/proc/loadavg: 4.01 3.75 2.34 5/194 5998
/proc/meminfo: memFree=24293888/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=148716 CPUtime=818.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 35155 0 0 0 81830 14 0 0 25 0 1 0 564912779 152285184 34976 33554432000 4194304 4218580 140735818124112 18446744073709551615 4213924 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 37179 34976 131 6 0 35649 0
Current children cumulated CPU time (s) 822.27
Current children cumulated vsize (KiB) 157416

[startup+882.3 s]
/proc/loadavg: 4.00 3.80 2.44 5/194 5999
/proc/meminfo: memFree=24271280/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=156468 CPUtime=878.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 37117 0 0 0 87828 16 0 0 25 0 1 0 564912779 160223232 36921 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208446 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 39117 36921 131 6 0 37587 0
Current children cumulated CPU time (s) 882.27
Current children cumulated vsize (KiB) 165168

[startup+942.3 s]
/proc/loadavg: 4.00 3.83 2.53 5/194 6001
/proc/meminfo: memFree=24252896/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=162088 CPUtime=938.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 38534 0 0 0 93828 16 0 0 25 0 1 0 564912779 165978112 38315 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208446 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 40522 38315 131 6 0 38992 0
Current children cumulated CPU time (s) 942.27
Current children cumulated vsize (KiB) 170788

[startup+1002.3 s]
/proc/loadavg: 4.00 3.86 2.62 5/194 6003
/proc/meminfo: memFree=24228084/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=162988 CPUtime=998.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 38804 0 0 0 99828 16 0 0 25 0 1 0 564912779 166899712 38576 33554432000 4194304 4218580 140735818124112 18446744073709551615 4209953 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 40747 38576 131 6 0 39217 0
Current children cumulated CPU time (s) 1002.27
Current children cumulated vsize (KiB) 171688

[startup+1062.3 s]
/proc/loadavg: 4.00 3.88 2.71 5/194 6004
/proc/meminfo: memFree=24225208/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=162988 CPUtime=1058.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 38822 0 0 0 105828 16 0 0 25 0 1 0 564912779 166899712 38576 33554432000 4194304 4218580 140735818124112 18446744073709551615 4210069 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 40747 38576 131 6 0 39217 0
Current children cumulated CPU time (s) 1062.27
Current children cumulated vsize (KiB) 171688

[startup+1122.3 s]
/proc/loadavg: 4.00 3.90 2.78 5/194 6006
/proc/meminfo: memFree=24221208/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=163052 CPUtime=1118.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 38841 0 0 0 111828 16 0 0 25 0 1 0 564912779 166965248 38589 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208438 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 40763 38589 131 6 0 39233 0
Current children cumulated CPU time (s) 1122.27
Current children cumulated vsize (KiB) 171752

[startup+1182.3 s]
/proc/loadavg: 4.00 3.92 2.86 5/194 6007
/proc/meminfo: memFree=24210256/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=163020 CPUtime=1178.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 38861 0 0 0 117828 16 0 0 25 0 1 0 564912779 166932480 38584 33554432000 4194304 4218580 140735818124112 18446744073709551615 4208272 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 40755 38584 131 6 0 39225 0
Current children cumulated CPU time (s) 1182.27
Current children cumulated vsize (KiB) 171720

[startup+1242.3 s]
/proc/loadavg: 4.06 3.94 2.93 5/194 6009
/proc/meminfo: memFree=24210356/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=163084 CPUtime=1238.44 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 38891 0 0 0 123828 16 0 0 25 0 1 0 564912779 166998016 38598 33554432000 4194304 4218580 140735818124112 18446744073709551615 4211250 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 40771 38598 131 6 0 39241 0
Current children cumulated CPU time (s) 1242.27
Current children cumulated vsize (KiB) 171784



Maximum wall clock time exceeded: sending SIGTERM then SIGKILL

[startup+1300 s]
/proc/loadavg: 4.02 3.95 3.00 4/191 6012
/proc/meminfo: memFree=24391888/32951124 swapFree=67111348/67111528
[pid=5920] ppid=5918 vsize=8700 CPUtime=3.83 cores=1,3
/proc/5920/stat : 5920 (esg_static.sh) S 5918 5920 5867 0 -1 4202496 354 50214 0 0 0 0 371 12 18 0 1 0 564912394 8908800 252 33554432000 4194304 4922060 140735612275296 18446744073709551615 252457884805 0 65536 4100 65538 18446744071562232103 0 0 17 1 0 0 0
/proc/5920/statm: 2175 252 209 178 0 68 0
[pid=5935] ppid=5920 vsize=168920 CPUtime=1296.14 cores=1,3
/proc/5935/stat : 5935 (cdcl) R 5920 5920 5867 0 -1 4202496 40360 0 0 0 129597 17 0 0 25 0 1 0 564912779 172974080 40045 33554432000 4194304 4218580 140735818124112 18446744073709551615 4213922 0 0 4096 24578 0 0 0 17 1 0 0 0
/proc/5935/statm: 42230 40045 131 6 0 40700 0
Current children cumulated CPU time (s) 1299.97
Current children cumulated vsize (KiB) 177620

Sending SIGTERM to process tree (bottom up)
Sleeping 2 seconds

Solver just ended. Dumping a history of the last processes samples

Child ended because it received signal 15 (SIGTERM)

# WARNING:
# CPU time reported by wait4() is probably wrong !
# wait4(...,&childrusage) returns 5920 and gives
#  childrusage.ru_utime.tv_sec=3
#  childrusage.ru_utime.tv_usec=716435
#  childrusage.ru_stime.tv_sec=0
#  childrusage.ru_stime.tv_usec=129980
# CPU time returned by wait4() is 3.84642
# while last known CPU time is 1299.97
#
# Solver probably didn't/couldn't wait for its children
# Using CPU time of the last sample as value...

Real time (s): 1300.01
CPU time (s): 1299.97
CPU user time (s): 1299.68
CPU system time (s): 0.29
CPU usage (%): 99.9968
Max. virtual memory (cumulated for all children) (KiB): 177684

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 3.71643
system time used= 0.12998
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 50568
page faults= 0
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 6
involuntary context switches= 32

runsolver used 2.00969 second user time and 5.09323 second system time

The end

Launcher Data

Begin job on node111 at 2011-04-25 17:53:39
IDJOB=3280195
IDBENCH=20352
IDSOLVER=1609
FILE ID=node111/3280195-1303746818
RUNJOBID= node111-1303746815-5888
PBS_JOBID= 13154051
Free space on /tmp= 70676 MiB

SOLVER NAME= rcl 2011-04-01
BENCH NAME= SAT07/industrial/anbulagan/hard-sat/partial-10-15-s.cnf
COMMAND LINE= ./esg_static.sh BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3280195-1303746818/watcher-3280195-1303746818 -o /tmp/evaluation-result-3280195-1303746818/solver-3280195-1303746818 -C 2400 -W 1300 -M 7680  ./esg_static.sh HOME/instance-3280195-1303746818.cnf

TIME LIMIT= 2400 seconds
MEMORY LIMIT= 7680 MiB
NBCORE= 2

MD5SUM BENCH= a6b04ec2cace5c4e6bef212c7f2df796
RANDOM SEED=1048513436

node111.alineos.net Linux 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009

/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.849
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5333.69
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.849
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 16
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5428.12
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.849
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 2
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.75
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.849
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 18
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.86
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 4
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.849
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.75
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 5
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.849
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 20
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.83
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 6
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.849
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 6
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.67
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 7
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.849
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 22
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.83
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951124 kB
MemFree:      24764368 kB
Buffers:       1206984 kB
Cached:        6314872 kB
SwapCached:        132 kB
Active:        2520164 kB
Inactive:      5194968 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      24764368 kB
SwapTotal:    67111528 kB
SwapFree:     67111348 kB
Dirty:           61184 kB
Writeback:           0 kB
AnonPages:      193000 kB
Mapped:          15196 kB
Slab:           406916 kB
PageTables:       5828 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:   390512 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    296008 kB
VmallocChunk: 34359440975 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 70580 MiB
End job on node111 at 2011-04-25 18:15:21