Trace number 3691391

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 NameAnswerobjective functionCPU timeWall clock time
SCIP spx SCIP 2.1.1.4. with SoPlex 1.6.0.3 fixed? (TO) 1802.15 1802.45

General information on the benchmark

Name/OPT-SMALLINT-LIN/sroussel/NG/
normalized-NG.dot_unif_10null20mast_rapportOE1.0_TMAX300_K192_cod2.opb
MD5SUM8d651cc878ba5f8db7c83d3bfed1cb1c
Bench CategoryOPT-SMALLINT-LIN (optimisation, small integers, linear constraints)
Best result obtained on this benchmarkSAT
Best value of the objective obtained on this benchmark-98026
Best CPU time to get the best result obtained on this benchmark1800.85
Has Objective FunctionYES
Satisfiable
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of variables400896
Total number of constraints402763
Number of constraints which are clauses400785
Number of constraints which are cardinality constraints (but not clauses)194
Number of constraints which are nor clauses,nor cardinality constraints1784
Minimum length of a constraint2
Maximum length of a constraint58023
Number of terms in the objective function 1605
Biggest coefficient in the objective function 1000
Number of bits for the biggest coefficient in the objective function 10
Sum of the numbers in the objective function 987807
Number of bits of the sum of numbers in the objective function 20
Biggest number in a constraint 1000
Number of bits of the biggest number in a constraint 10
Biggest sum of numbers in a constraint 987807
Number of bits of the biggest sum of numbers20
Number of products (including duplicates)0
Sum of products size (including duplicates)0
Number of different products0
Sum of products size0

Solver Data

0.00/0.00	c SCIP version 2.1.1.4 [precision: 8 byte] [memory: block] [mode: optimized] [LP solver: SoPlex 1.6.0.3] [GitHash: a3bf3a4-dirty]
0.00/0.00	c Copyright (c) 2002-2012 Konrad-Zuse-Zentrum fuer Informationstechnik Berlin (ZIB)
0.00/0.00	c 
0.00/0.00	c user parameter file <scip.set> not found - using default parameters
0.00/0.00	c reading problem <HOME/instance-3691391-1338026987.opb>
1.99/2.02	c original problem has 400896 variables (400896 bin, 0 int, 0 impl, 0 cont) and 402763 constraints
1.99/2.02	c problem read in 2.02
4.59/4.65	c presolving:
8.39/8.48	c (round 1) 0 del vars, 1977 del conss, 0 add conss, 0 chg bounds, 0 chg sides, 0 chg coeffs, 398809 upgd conss, 67806 impls, 1977 clqs
9.48/9.59	c (round 2) 0 del vars, 1977 del conss, 0 add conss, 0 chg bounds, 0 chg sides, 0 chg coeffs, 400786 upgd conss, 67806 impls, 1977 clqs

Verifier Data

ERROR: no interpretation found !

Watcher Data

runsolver Copyright (C) 2010-2011 Olivier ROUSSEL

This is runsolver version 3.3.1 (svn: 989)

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-3691391-1338026987/watcher-3691391-1338026987 -o /tmp/evaluation-result-3691391-1338026987/solver-3691391-1338026987 -C 1800 -W 1900 -M 15500 HOME/scip-2.1.1.4fix.linux.x86_64.gnu.opt.spx -f HOME/instance-3691391-1338026987.opb -t 1800 -m 15500 

running on 4 cores: 0,2,4,6

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): 1900 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 15872000 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 15923200 KiB
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 2.00 2.00 2.00 3/176 31700
/proc/meminfo: memFree=27222292/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=11648 CPUtime=0 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 1670 0 0 0 0 0 0 0 20 0 1 0 268827397 11927552 1624 33554432000 4194304 10173063 140736346779808 140733316061752 8800002 0 0 4096 0 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 2912 1625 416 1460 0 1443 0

[startup+0.042647 s]
/proc/loadavg: 2.00 2.00 2.00 3/176 31700
/proc/meminfo: memFree=27222292/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=27748 CPUtime=0.03 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 5705 0 0 0 3 0 0 0 20 0 1 0 268827397 28413952 5659 33554432000 4194304 10173063 140736346779808 140733316061752 8985008 0 0 4096 0 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 6937 5659 416 1460 0 5468 0
Current children cumulated CPU time (s) 0.03
Current children cumulated vsize (KiB) 27748

[startup+0.10034 s]
/proc/loadavg: 2.00 2.00 2.00 3/176 31700
/proc/meminfo: memFree=27222292/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=44756 CPUtime=0.09 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 9954 0 0 0 8 1 0 0 20 0 1 0 268827397 45830144 9908 33554432000 4194304 10173063 140736346779808 140733316061752 8867721 0 0 4096 0 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 11189 9908 416 1460 0 9720 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 44756

[startup+0.300313 s]
/proc/loadavg: 2.00 2.00 2.00 3/176 31700
/proc/meminfo: memFree=27222292/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=87776 CPUtime=0.29 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 20689 0 0 0 27 2 0 0 20 0 1 0 268827397 89882624 20643 33554432000 4194304 10173063 140736346779808 140733316061752 5283372 0 0 4096 0 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 21944 20643 416 1460 0 20475 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 87776

[startup+0.70032 s]
/proc/loadavg: 2.00 2.00 2.00 3/176 31700
/proc/meminfo: memFree=27222292/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=198132 CPUtime=0.69 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 48242 0 0 0 63 6 0 0 20 0 1 0 268827397 202887168 48196 33554432000 4194304 10173063 140736346779808 140733316061752 5474314 0 0 4096 0 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 49533 48196 416 1460 0 48064 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 198132

[startup+1.50031 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31701
/proc/meminfo: memFree=26953312/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=400056 CPUtime=1.49 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 98653 0 0 0 138 11 0 0 20 0 1 0 268827397 409657344 98607 33554432000 4194304 10173063 140736346779808 140736346644984 8824024 0 0 4096 0 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 100014 98607 416 1460 0 98545 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 400056

[startup+3.10036 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31701
/proc/meminfo: memFree=26732096/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=935644 CPUtime=3.09 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 231970 0 0 0 279 30 0 0 20 0 1 0 268827397 958099456 232381 33554432000 4194304 10173063 140736346779808 140736346775640 5760629 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 233911 232381 494 1460 0 232442 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 935644

[startup+6.30032 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31701
/proc/meminfo: memFree=25989756/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=1343960 CPUtime=6.29 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 356241 0 0 0 562 67 0 0 20 0 1 0 268827397 1376215040 333243 33554432000 4194304 10173063 140736346779808 140736346776808 8963895 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 335990 333243 562 1460 0 334521 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 1343960

[startup+12.7003 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31701
/proc/meminfo: memFree=25334468/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=1902516 CPUtime=12.69 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 509171 0 0 0 1145 124 0 0 20 0 1 0 268827397 1948176384 471511 33554432000 4194304 10173063 140736346779808 140736346775304 8925062 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 475629 471511 614 1460 0 474160 0
Current children cumulated CPU time (s) 12.69
Current children cumulated vsize (KiB) 1902516

[startup+25.5003 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 31704
/proc/meminfo: memFree=25328016/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=1910132 CPUtime=25.48 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 510943 0 0 0 2424 124 0 0 20 0 1 0 268827397 1955975168 473282 33554432000 4194304 10173063 140736346779808 140736346775304 8925068 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 477533 473282 614 1460 0 476064 0
Current children cumulated CPU time (s) 25.48
Current children cumulated vsize (KiB) 1910132

[startup+51.1003 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 31705
/proc/meminfo: memFree=25319848/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=1914036 CPUtime=51.08 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 512003 0 0 0 4984 124 0 0 20 0 1 0 268827397 1959972864 475309 33554432000 4194304 10173063 140736346779808 140736346776184 8925068 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 478509 475309 614 1460 0 477040 0
Current children cumulated CPU time (s) 51.08
Current children cumulated vsize (KiB) 1914036

[startup+102.306 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31705
/proc/meminfo: memFree=24546448/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=2715196 CPUtime=102.28 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 707129 0 0 0 10079 149 0 0 20 0 1 0 268827397 2780360704 669923 33554432000 4194304 10173063 140736346779808 140736346774920 4949069 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 678799 669923 614 1460 0 677330 0
Current children cumulated CPU time (s) 102.28
Current children cumulated vsize (KiB) 2715196

[startup+162.3 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31705
/proc/meminfo: memFree=23963604/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3308656 CPUtime=162.25 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 832433 0 0 0 16059 166 0 0 20 0 1 0 268827397 3388063744 813590 33554432000 4194304 10173063 140736346779808 140736346774920 8925020 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 827164 813590 614 1460 0 825695 0
Current children cumulated CPU time (s) 162.25
Current children cumulated vsize (KiB) 3308656

[startup+222.3 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31705
/proc/meminfo: memFree=23961896/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3309680 CPUtime=222.25 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 832901 0 0 0 22059 166 0 0 20 0 1 0 268827397 3389112320 814058 33554432000 4194304 10173063 140736346779808 140736346774920 8925052 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 827420 814058 614 1460 0 825951 0
Current children cumulated CPU time (s) 222.25
Current children cumulated vsize (KiB) 3309680

[startup+282.3 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31743
/proc/meminfo: memFree=22149336/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3311728 CPUtime=282.24 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 833624 0 0 0 28057 167 0 0 20 0 1 0 268827397 3391209472 814781 33554432000 4194304 10173063 140736346779808 140736346774920 8925062 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 827932 814781 614 1460 0 826463 0
Current children cumulated CPU time (s) 282.24
Current children cumulated vsize (KiB) 3311728

[startup+342.3 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31743
/proc/meminfo: memFree=22142792/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3312752 CPUtime=342.23 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 834024 0 0 0 34056 167 0 0 20 0 1 0 268827397 3392258048 815349 33554432000 4194304 10173063 140736346779808 140736346774920 8925020 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 828188 815349 614 1460 0 826719 0
Current children cumulated CPU time (s) 342.23
Current children cumulated vsize (KiB) 3312752

[startup+402.3 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31744
/proc/meminfo: memFree=20784444/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3312752 CPUtime=402.22 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 834237 0 0 0 40055 167 0 0 20 0 1 0 268827397 3392258048 815561 33554432000 4194304 10173063 140736346779808 140736346774920 8925042 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 828188 815561 614 1460 0 826719 0
Current children cumulated CPU time (s) 402.22
Current children cumulated vsize (KiB) 3312752

[startup+462.3 s]
/proc/loadavg: 2.04 2.01 2.00 3/177 31744
/proc/meminfo: memFree=20776908/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3313644 CPUtime=462.21 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 834603 0 0 0 46054 167 0 0 20 0 1 0 268827397 3393171456 817233 33554432000 4194304 10173063 140736346779808 140736346775448 8925062 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 828411 817233 614 1460 0 826942 0
Current children cumulated CPU time (s) 462.21
Current children cumulated vsize (KiB) 3313644

[startup+522.3 s]
/proc/loadavg: 2.01 2.01 2.00 3/177 31744
/proc/meminfo: memFree=20766644/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3315500 CPUtime=522.19 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 835244 0 0 0 52052 167 0 0 20 0 1 0 268827397 3395072000 819453 33554432000 4194304 10173063 140736346779808 140736346774920 8925032 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 828875 819453 614 1460 0 827406 0
Current children cumulated CPU time (s) 522.19
Current children cumulated vsize (KiB) 3315500

[startup+582.3 s]
/proc/loadavg: 2.07 2.02 2.00 3/177 31744
/proc/meminfo: memFree=20763200/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3315500 CPUtime=582.18 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 835357 0 0 0 58051 167 0 0 20 0 1 0 268827397 3395072000 820161 33554432000 4194304 10173063 140736346779808 140736346774920 8925047 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 828875 820161 614 1460 0 827406 0
Current children cumulated CPU time (s) 582.18
Current children cumulated vsize (KiB) 3315500

[startup+642.3 s]

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

/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 837383 0 0 0 100044 168 0 0 20 0 1 0 268827397 3399983104 826266 33554432000 4194304 10173063 140736346779808 140736346774920 8925068 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 830074 826266 614 1460 0 828605 0
Current children cumulated CPU time (s) 1002.12
Current children cumulated vsize (KiB) 3320296

[startup+1062.3 s]
/proc/loadavg: 2.00 2.02 2.00 3/177 31749
/proc/meminfo: memFree=20729292/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3320296 CPUtime=1062.11 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 837409 0 0 0 106043 168 0 0 20 0 1 0 268827397 3399983104 826292 33554432000 4194304 10173063 140736346779808 140736346774920 8925062 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 830074 826292 614 1460 0 828605 0
Current children cumulated CPU time (s) 1062.11
Current children cumulated vsize (KiB) 3320296

[startup+1122.3 s]
/proc/loadavg: 2.06 2.03 2.00 3/177 31749
/proc/meminfo: memFree=20728024/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3321000 CPUtime=1122.1 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 837618 0 0 0 112042 168 0 0 20 0 1 0 268827397 3400704000 826501 33554432000 4194304 10173063 140736346779808 140736346775304 8925057 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 830250 826501 614 1460 0 828781 0
Current children cumulated CPU time (s) 1122.1
Current children cumulated vsize (KiB) 3321000

[startup+1182.3 s]
/proc/loadavg: 2.02 2.02 2.00 3/178 31750
/proc/meminfo: memFree=20725812/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3322724 CPUtime=1182.09 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 838106 0 0 0 118041 168 0 0 20 0 1 0 268827397 3402469376 826956 33554432000 4194304 10173063 140736346779808 140736346774920 8925032 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 830681 826956 614 1460 0 829212 0
Current children cumulated CPU time (s) 1182.09
Current children cumulated vsize (KiB) 3322724

[startup+1242.3 s]
/proc/loadavg: 2.00 2.02 2.00 3/178 31753
/proc/meminfo: memFree=20722988/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3324772 CPUtime=1242.08 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 838654 0 0 0 124040 168 0 0 20 0 1 0 268827397 3404566528 827504 33554432000 4194304 10173063 140736346779808 140736346774920 8925020 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 831193 827504 614 1460 0 829724 0
Current children cumulated CPU time (s) 1242.08
Current children cumulated vsize (KiB) 3324772

[startup+1302.3 s]
/proc/loadavg: 2.00 2.01 2.00 3/177 31754
/proc/meminfo: memFree=20721972/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3324772 CPUtime=1302.08 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 838678 0 0 0 130040 168 0 0 20 0 1 0 268827397 3404566528 827641 33554432000 4194304 10173063 140736346779808 140736346774920 8925057 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 831193 827641 614 1460 0 829724 0
Current children cumulated CPU time (s) 1302.08
Current children cumulated vsize (KiB) 3324772

[startup+1362.3 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31754
/proc/meminfo: memFree=20719364/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3324772 CPUtime=1362.06 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 838713 0 0 0 136038 168 0 0 20 0 1 0 268827397 3404566528 828007 33554432000 4194304 10173063 140736346779808 140736346774920 8925037 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 831193 828007 614 1460 0 829724 0
Current children cumulated CPU time (s) 1362.06
Current children cumulated vsize (KiB) 3324772

[startup+1422.31 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31754
/proc/meminfo: memFree=20715000/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3325796 CPUtime=1422.06 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 838994 0 0 0 142038 168 0 0 20 0 1 0 268827397 3405615104 828639 33554432000 4194304 10173063 140736346779808 140736346774920 8925052 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 831449 828639 614 1460 0 829980 0
Current children cumulated CPU time (s) 1422.06
Current children cumulated vsize (KiB) 3325796

[startup+1482.3 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31754
/proc/meminfo: memFree=20711680/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3327648 CPUtime=1482.05 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 839494 0 0 0 148036 169 0 0 20 0 1 0 268827397 3407511552 829139 33554432000 4194304 10173063 140736346779808 140736346774920 8925047 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 831912 829139 614 1460 0 830443 0
Current children cumulated CPU time (s) 1482.05
Current children cumulated vsize (KiB) 3327648

[startup+1542.3 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31754
/proc/meminfo: memFree=20710840/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3327648 CPUtime=1542.04 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 839519 0 0 0 154035 169 0 0 20 0 1 0 268827397 3407511552 829163 33554432000 4194304 10173063 140736346779808 140736346774920 8925037 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 831912 829163 614 1460 0 830443 0
Current children cumulated CPU time (s) 1542.04
Current children cumulated vsize (KiB) 3327648

[startup+1602.3 s]
/proc/loadavg: 2.07 2.02 2.00 3/177 31755
/proc/meminfo: memFree=20708760/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3329696 CPUtime=1602.02 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 840070 0 0 0 160033 169 0 0 20 0 1 0 268827397 3409608704 829715 33554432000 4194304 10173063 140736346779808 140736346774920 8925037 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 832424 829715 614 1460 0 830955 0
Current children cumulated CPU time (s) 1602.02
Current children cumulated vsize (KiB) 3329696

[startup+1662.3 s]
/proc/loadavg: 2.02 2.01 2.00 3/177 31755
/proc/meminfo: memFree=20706060/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3329696 CPUtime=1662.02 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 840094 0 0 0 166033 169 0 0 20 0 1 0 268827397 3409608704 829739 33554432000 4194304 10173063 140736346779808 140736346774920 8925068 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 832424 829739 614 1460 0 830955 0
Current children cumulated CPU time (s) 1662.02
Current children cumulated vsize (KiB) 3329696

[startup+1722.3 s]
/proc/loadavg: 2.01 2.00 2.00 3/177 31755
/proc/meminfo: memFree=20704476/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3330720 CPUtime=1722 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 840380 0 0 0 172031 169 0 0 20 0 1 0 268827397 3410657280 830025 33554432000 4194304 10173063 140736346779808 140736346774920 8925037 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 832680 830025 614 1460 0 831211 0
Current children cumulated CPU time (s) 1722
Current children cumulated vsize (KiB) 3330720

[startup+1782.3 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31755
/proc/meminfo: memFree=20701776/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3332576 CPUtime=1781.99 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 840875 0 0 0 178030 169 0 0 20 0 1 0 268827397 3412557824 830520 33554432000 4194304 10173063 140736346779808 140736346774920 8925042 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 833144 830520 614 1460 0 831675 0
Current children cumulated CPU time (s) 1781.99
Current children cumulated vsize (KiB) 3332576



Maximum CPU time exceeded: sending SIGTERM then SIGKILL

[startup+1800.4 s]
/proc/loadavg: 2.00 2.00 2.00 3/177 31755
/proc/meminfo: memFree=20701012/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3332576 CPUtime=1800.1 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 840886 0 0 0 179841 169 0 0 20 0 1 0 268827397 3412557824 830531 33554432000 4194304 10173063 140736346779808 140736346774920 8925032 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 833144 830531 614 1460 0 831675 0
Current children cumulated CPU time (s) 1800.1
Current children cumulated vsize (KiB) 3332576

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

Sending SIGKILL to process tree (bottom up)

Sending SIGKILL to -31700

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

[startup+1801.4 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 31756
/proc/meminfo: memFree=20701012/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3332576 CPUtime=1801.09 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 840886 0 0 0 179940 169 0 0 20 0 1 0 268827397 3412557824 830531 33554432000 4194304 10173063 140736346779808 140736346774400 8925062 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 833144 830531 614 1460 0 831675 0
Current children cumulated CPU time (s) 1801.09
Current children cumulated vsize (KiB) 3332576

[startup+1802.2 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 31756
/proc/meminfo: memFree=20700632/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3332576 CPUtime=1801.89 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 840886 0 0 0 180020 169 0 0 20 0 1 0 268827397 3412557824 830531 33554432000 4194304 10173063 140736346779808 140736346774400 8925068 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 833144 830531 614 1460 0 831675 0
Current children cumulated CPU time (s) 1801.89
Current children cumulated vsize (KiB) 3332576

[startup+1802.4 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 31756
/proc/meminfo: memFree=20700632/32873844 swapFree=6088/6088
[pid=31700] ppid=31698 vsize=3332576 CPUtime=1802.09 cores=0,2,4,6
/proc/31700/stat : 31700 (scip-2.1.1.4fix) R 31698 31700 30587 0 -1 4202496 840886 0 0 0 180040 169 0 0 20 0 1 0 268827397 3412557824 830531 33554432000 4194304 10173063 140736346779808 140736346774400 8925068 0 0 4096 16384 0 0 0 17 4 0 0 0 0 0
/proc/31700/statm: 833144 830531 614 1460 0 831675 0
Current children cumulated CPU time (s) 1802.09
Current children cumulated vsize (KiB) 3332576

Child ended because it received signal 9 (SIGKILL)
Real time (s): 1802.45
CPU time (s): 1802.15
CPU user time (s): 1800.41
CPU system time (s): 1.73873
CPU usage (%): 99.9834
Max. virtual memory (cumulated for all children) (KiB): 3332576

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 1800.41
system time used= 1.73873
maximum resident set size= 3322124
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 840886
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= 34
involuntary context switches= 1856

runsolver used 3.64644 second user time and 11.0013 second system time

The end

Launcher Data

Begin job on node108 at 2012-05-26 12:09:48
IDJOB=3691391
IDBENCH=90877
IDSOLVER=2270
FILE ID=node108/3691391-1338026987
RUNJOBID= node108-1338016938-30603
PBS_JOBID= 14624363
Free space on /tmp= 71672 MiB

SOLVER NAME= SCIP spx SCIP 2.1.1.4. with SoPlex 1.6.0.3 fixed
BENCH NAME= PB12/normalized-PB12/OPT-SMALLINT-LIN/sroussel/NG/normalized-NG.dot_unif_10null20mast_rapportOE1.0_TMAX300_K192_cod2.opb
COMMAND LINE= HOME/scip-2.1.1.4fix.linux.x86_64.gnu.opt.spx -f BENCHNAME -t TIMEOUT -m MEMLIMIT
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3691391-1338026987/watcher-3691391-1338026987 -o /tmp/evaluation-result-3691391-1338026987/solver-3691391-1338026987 -C 1800 -W 1900 -M 15500  HOME/scip-2.1.1.4fix.linux.x86_64.gnu.opt.spx -f HOME/instance-3691391-1338026987.opb -t 1800 -m 15500

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 15500 MiB
NBCORE= 4

MD5SUM BENCH= 8d651cc878ba5f8db7c83d3bfed1cb1c
RANDOM SEED=1131903849

node108.alineos.net Linux 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011

/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		: 2666.273
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.54
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.273
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 16
initial apicid	: 16
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5331.91
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.273
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 2
initial apicid	: 2
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5331.91
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.273
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 18
initial apicid	: 18
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5331.91
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 4
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.273
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 4
initial apicid	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5331.91
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 5
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.273
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 20
initial apicid	: 20
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5438.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 6
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.273
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 6
initial apicid	: 6
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5331.90
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 7
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.273
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 22
initial apicid	: 22
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5331.91
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:       32873844 kB
MemFree:        27221928 kB
Buffers:          226016 kB
Cached:          4521660 kB
SwapCached:            0 kB
Active:           699160 kB
Inactive:        4179080 kB
Active(anon):     133168 kB
Inactive(anon):        0 kB
Active(file):     565992 kB
Inactive(file):  4179080 kB
Unevictable:        6088 kB
Mlocked:            6088 kB
SwapTotal:      67108856 kB
SwapFree:       67108856 kB
Dirty:             41160 kB
Writeback:             0 kB
AnonPages:        241164 kB
Mapped:            17640 kB
Shmem:               200 kB
Slab:             634660 kB
SReclaimable:      76808 kB
SUnreclaim:       557852 kB
KernelStack:        1448 kB
PageTables:         4276 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    83545776 kB
Committed_AS:     241992 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      346368 kB
VmallocChunk:   34341987984 kB
HardwareCorrupted:     0 kB
AnonHugePages:    212992 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:        7872 kB
DirectMap2M:    33538048 kB

Free space on /tmp at the end= 71632 MiB
End job on node108 at 2012-05-26 12:39:51