Trace number 2060653

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
Sugar v1.14.6+picosatSAT 1.17482 1.07349

General information on the benchmark

Namecsp/rcpsp/
normalized-rcpsp20-14.xml
MD5SUM591477a6650cad772ecfa66dbc882b20
Bench CategoryAlldiff+Cumul+Elt+WSum (alldiff,cumulative,element,weightedsum)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.019996
Satisfiable
(Un)Satisfiability was proved
Number of variables20
Number of constraints18
Maximum constraint arity20
Maximum domain size18
Number of constraints which are defined in extension0
Number of constraints which are defined in intension15
Global constraints used (with number of constraints)cumulative(3)

Solver Data 

0.00/0.07	c 0	Sugar v1-14-6 + HOME/picosat
0.00/0.07	c 0	BEGIN Sat Jul 11 17:26:59 2009
0.00/0.07	c 0	PID 14565
0.00/0.07	c 0	HOST node58.alineos.net
0.00/0.07	c 0	CONVERTING HOME/instance-2060653-1247326019.xml TO HOME/temp.csp
0.00/0.07	c 0	CMD java -Xmx700M -cp 'HOME/sugar-v1-14-6.jar' jp.ac.kobe_u.cs.sugar.XML2CSP -v -v 'HOME/instance-2060653-1247326019.xml' 'HOME/temp.csp'
0.06/0.22	c 0	20 domains, 20 variables, 1 predicates, 0 relations, 18 constraints
0.06/0.23	c 0	ENCODING HOME/temp.csp TO HOME/temp.cnf
0.06/0.23	c 0	CMD java -Xmx700M -cp 'HOME/sugar-v1-14-6.jar' jp.ac.kobe_u.cs.sugar.SugarMain -v -v -competition -encode 'HOME/temp.csp' 'HOME/temp.cnf' 'HOME/temp.map'
0.23/0.30	c 0	Parsing HOME/temp.csp
0.23/0.32	c 0	parsed 59 expressions
0.23/0.33	c 0	Heap : 0 MiB used (max 694 MiB), NonHeap : 13 MiB used (max 116 MiB)
0.23/0.33	c 0	Converting to clausal form CSP
0.23/0.34	c 0	converted 6 (10%) expressions
0.23/0.34	c 0	converted 12 (20%) expressions
0.23/0.34	c 0	converted 18 (30%) expressions
0.23/0.34	c 0	converted 24 (40%) expressions
0.23/0.34	c 0	converted 30 (50%) expressions
0.23/0.34	c 0	converted 36 (60%) expressions
0.23/0.35	c 0	converted 42 (70%) expressions
0.23/0.35	c 0	converted 48 (80%) expressions
0.23/0.35	c 0	converted 54 (90%) expressions
0.23/0.55	c 1	converted 59 (100%) expressions
0.23/0.55	c 1	CSP : 476 integers, 172 booleans, 1253 clauses, largest domain size 18
0.23/0.55	c 1	Heap : 1 MiB used (max 694 MiB), NonHeap : 13 MiB used (max 116 MiB)
0.23/0.55	c 1	Propagation in CSP
0.23/0.56	c 1	6 values, 0 unsatisfiable literals, and 0 valid clauses are removed
0.23/0.56	c 1	CSP : 476 integers, 172 booleans, 1253 clauses, largest domain size 18
0.23/0.57	c 1	Heap : 1 MiB used (max 694 MiB), NonHeap : 13 MiB used (max 116 MiB)
0.23/0.57	c 1	Simplifing CSP by introducing new Boolean variables
0.23/0.57	c 1	CSP : 476 integers, 172 booleans, 1253 clauses, largest domain size 18
0.23/0.57	c 1	Heap : 1 MiB used (max 694 MiB), NonHeap : 13 MiB used (max 116 MiB)
0.23/0.59	c 1	Encoding CSP to SAT : HOME/temp.cnf
0.23/0.61	c 1	48 (10%) CSP integer variables are encoded (204 clauses, 2111 bytes)
0.23/0.61	c 1	96 (20%) CSP integer variables are encoded (204 clauses, 2111 bytes)
0.23/0.61	c 1	143 (30%) CSP integer variables are encoded (216 clauses, 2243 bytes)
0.23/0.61	c 1	191 (40%) CSP integer variables are encoded (248 clauses, 2595 bytes)
0.23/0.61	c 1	238 (50%) CSP integer variables are encoded (276 clauses, 2903 bytes)
0.23/0.61	c 1	286 (60%) CSP integer variables are encoded (300 clauses, 3167 bytes)
0.23/0.61	c 1	334 (70%) CSP integer variables are encoded (312 clauses, 3299 bytes)
0.23/0.61	c 1	381 (80%) CSP integer variables are encoded (312 clauses, 3299 bytes)
0.23/0.61	c 1	429 (90%) CSP integer variables are encoded (422 clauses, 4509 bytes)
0.23/0.61	c 1	476 (100%) CSP integer variables are encoded (603 clauses, 6512 bytes)
0.23/0.61	c 1	126 (10%) CSP clauses are encoded (815 clauses, 8673 bytes)
0.23/0.62	c 1	251 (20%) CSP clauses are encoded (1048 clauses, 12177 bytes)
0.23/0.62	c 1	376 (30%) CSP clauses are encoded (1288 clauses, 15793 bytes)
0.23/0.63	c 1	502 (40%) CSP clauses are encoded (1644 clauses, 21509 bytes)
0.23/0.63	c 1	627 (50%) CSP clauses are encoded (1997 clauses, 27210 bytes)
0.23/0.63	c 1	752 (60%) CSP clauses are encoded (2235 clauses, 30816 bytes)
0.23/0.63	c 1	878 (70%) CSP clauses are encoded (2583 clauses, 36441 bytes)
0.23/0.63	c 1	1003 (80%) CSP clauses are encoded (2687 clauses, 37692 bytes)
0.23/0.67	c 1	1128 (90%) CSP clauses are encoded (5707 clauses, 94656 bytes)
0.23/0.76	c 1	1253 (100%) CSP clauses are encoded (9079 clauses, 148929 bytes)
0.23/0.76	c 1	1253 CSP clauses encoded
0.23/0.76	c 1	Writing map file : HOME/temp.map
0.23/0.76	c 1	Heap : 1 MiB used (max 694 MiB), NonHeap : 13 MiB used (max 116 MiB)
0.23/0.76	c 1	SAT : 1179 SAT variables, 9079 SAT clauses, 148929 bytes
0.23/0.76	c 1	Heap : 1 MiB used (max 694 MiB), NonHeap : 13 MiB used (max 116 MiB)
0.23/0.80	c 1	SOLVING HOME/temp.cnf
0.23/0.80	c 1	CMD HOME/picosat 'HOME/temp.cnf' -o 'HOME/temp.out'
0.92/0.92	c 1	DECODING HOME/temp.out WITH HOME/temp.map
0.92/0.92	c 1	CMD java -Xmx700M -cp 'HOME/sugar-v1-14-6.jar' jp.ac.kobe_u.cs.sugar.SugarMain -v -v -competition -decode 'HOME/temp.out' 'HOME/temp.map'
0.92/0.98	c 1	Decoding HOME/temp.out
1.11/1.01	s SATISFIABLE
1.11/1.01	v 3 0 9 0 11 4 4 2 4 13 10 9 13 13 0 5 11 3 7 17
1.11/1.01	c 1	Heap : 0 MiB used (max 694 MiB), NonHeap : 13 MiB used (max 116 MiB)
1.11/1.07	c 1	CPU 1.14 (0.04 0.02 0.92 0.16)
1.11/1.07	c 1	END Sat Jul 11 17:27:00 2009

Verifier Data 

OK

Watcher Data 

runsolver version 3.2.9 (svn:492) (c) roussel@cril.univ-artois.fr

command line: BIN/runsolver --timestamp -w /tmp/evaluation-result-2060653-1247326019/watcher-2060653-1247326019 -o /tmp/evaluation-result-2060653-1247326019/solver-2060653-1247326019 -C 1800 -W 2000 -M 900 HOME/sugar -c -vv -memlimit=900 -jar=HOME/sugar-v1-14-6.jar -solver=HOME/picosat -tmp=HOME/temp HOME/instance-2060653-1247326019.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): 2000 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
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 0.85 1.45 1.73 3/67 14565
/proc/meminfo: memFree=1763528/2055920 swapFree=4192812/4192956
[pid=14565] ppid=14563 vsize=12272 CPUtime=0
/proc/14565/stat : 14565 (sugar) R 14563 14565 12926 0 -1 4194304 359 0 0 0 0 0 0 0 18 0 1 0 19665024 12566528 327 996147200 4194304 4206940 548682068608 18446744073709551615 226238364261 0 0 4224 0 0 0 0 17 0 0 0
/proc/14565/statm: 3068 327 246 3 0 168 0

[startup+0.0994911 s]
/proc/loadavg: 0.85 1.45 1.73 3/67 14565
/proc/meminfo: memFree=1763528/2055920 swapFree=4192812/4192956
[pid=14565] ppid=14563 vsize=16868 CPUtime=0.06
/proc/14565/stat : 14565 (sugar) S 14563 14565 12926 0 -1 4194304 1227 128 0 0 4 2 0 0 17 0 1 0 19665024 17272832 1111 996147200 4194304 4206940 548682068608 18446744073709551615 226247094370 0 0 4224 16386 18446744071563648864 0 0 17 0 0 0
/proc/14565/statm: 4217 1111 409 3 0 796 0
Current children cumulated CPU time (s) 0.06
Current children cumulated vsize (KiB) 16868

[startup+0.101486 s]
/proc/loadavg: 0.85 1.45 1.73 3/67 14565
/proc/meminfo: memFree=1763528/2055920 swapFree=4192812/4192956
[pid=14565] ppid=14563 vsize=16868 CPUtime=0.06
/proc/14565/stat : 14565 (sugar) S 14563 14565 12926 0 -1 4194304 1227 128 0 0 4 2 0 0 17 0 1 0 19665024 17272832 1111 996147200 4194304 4206940 548682068608 18446744073709551615 226247094370 0 0 4224 16386 18446744071563648864 0 0 17 0 0 0
/proc/14565/statm: 4217 1111 409 3 0 796 0
Current children cumulated CPU time (s) 0.06
Current children cumulated vsize (KiB) 16868

[startup+0.301508 s]
/proc/loadavg: 0.85 1.45 1.73 3/67 14565
/proc/meminfo: memFree=1763528/2055920 swapFree=4192812/4192956
[pid=14565] ppid=14563 vsize=16868 CPUtime=0.23
/proc/14565/stat : 14565 (sugar) S 14563 14565 12926 0 -1 4194304 1292 4211 0 1 4 2 13 4 16 0 1 0 19665024 17272832 1111 996147200 4194304 4206940 548682068608 18446744073709551615 226247094370 0 0 4224 16386 18446744071563648864 0 0 17 0 0 0
/proc/14565/statm: 4217 1111 409 3 0 796 0
Current children cumulated CPU time (s) 0.23
Current children cumulated vsize (KiB) 16868

[startup+0.701543 s]
/proc/loadavg: 0.85 1.45 1.73 3/67 14565
/proc/meminfo: memFree=1763528/2055920 swapFree=4192812/4192956
[pid=14565] ppid=14563 vsize=16868 CPUtime=0.23
/proc/14565/stat : 14565 (sugar) S 14563 14565 12926 0 -1 4194304 1311 4211 0 1 4 2 13 4 16 0 1 0 19665024 17272832 1112 996147200 4194304 4206940 548682068608 18446744073709551615 226247094370 0 0 4224 16386 18446744071563648864 0 0 17 1 0 0
/proc/14565/statm: 4217 1112 409 3 0 796 0
Current children cumulated CPU time (s) 0.23
Current children cumulated vsize (KiB) 16868

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

[startup+0.90156 s]
/proc/loadavg: 0.85 1.45 1.73 3/67 14565
/proc/meminfo: memFree=1763528/2055920 swapFree=4192812/4192956
[pid=14565] ppid=14563 vsize=16868 CPUtime=0.92
/proc/14565/stat : 14565 (sugar) S 14563 14565 12926 0 -1 4194304 1365 10984 0 2 4 2 78 8 16 0 1 0 19665024 17272832 1113 996147200 4194304 4206940 548682068608 18446744073709551615 226247094370 0 0 4224 16386 18446744071563648864 0 0 17 1 0 0
/proc/14565/statm: 4217 1113 409 3 0 796 0
Current children cumulated CPU time (s) 0.92
Current children cumulated vsize (KiB) 16868

[startup+1.00157 s]
/proc/loadavg: 0.85 1.45 1.73 2/78 14599
/proc/meminfo: memFree=1755688/2055920 swapFree=4192812/4192956
[pid=14565] ppid=14563 vsize=16868 CPUtime=1.03
/proc/14565/stat : 14565 (sugar) S 14563 14565 12926 0 -1 4194304 1447 11448 0 2 4 2 83 14 16 0 1 0 19665024 17272832 1113 996147200 4194304 4206940 548682068608 18446744073709551615 226247094370 0 0 4224 16386 18446744071563648864 0 0 17 0 0 0
/proc/14565/statm: 4217 1113 409 3 0 796 0
[pid=14590] ppid=14565 vsize=5356 CPUtime=0
/proc/14590/stat : 14590 (sh) S 14565 14565 12926 0 -1 4194304 278 0 0 0 0 0 0 0 18 0 1 0 19665116 5484544 233 996147200 4194304 4889804 548682068752 18446744073709551615 226238194500 0 65536 4100 65538 18446744071563356171 0 0 17 0 0 0
/proc/14590/statm: 1339 233 193 169 0 50 0
[pid=14591] ppid=14590 vsize=862924 CPUtime=0.08
/proc/14591/stat : 14591 (java) S 14590 14565 12926 0 -1 0 2866 0 1 0 7 1 0 0 20 0 9 0 19665116 883634176 2337 996147200 134512640 134550932 4294955984 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 0 0 0
/proc/14591/statm: 215731 2337 1254 9 0 210644 0
[pid=14591/tid=14592] ppid=14590 vsize=862924 CPUtime=0.06
/proc/14591/task/14592/stat : 14592 (java) R 14590 14565 12926 0 -1 64 1946 0 1 0 5 1 0 0 17 0 9 0 19665117 883634176 2337 996147200 134512640 134550932 4294955984 18446744073709551615 4125978730 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=14591/tid=14593] ppid=14590 vsize=862924 CPUtime=0
/proc/14591/task/14593/stat : 14593 (java) S 14590 14565 12926 0 -1 64 2 0 0 0 0 0 0 0 22 0 9 0 19665118 883634176 2337 996147200 134512640 134550932 4294955984 18446744073709551615 4294960144 0 0 0 16800975 0 0 0 -1 0 0 0
[pid=14591/tid=14594] ppid=14590 vsize=862924 CPUtime=0
/proc/14591/task/14594/stat : 14594 (java) S 14590 14565 12926 0 -1 64 11 0 0 0 0 0 0 0 23 0 9 0 19665118 883634176 2337 996147200 134512640 134550932 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=14591/tid=14595] ppid=14590 vsize=862924 CPUtime=0
/proc/14591/task/14595/stat : 14595 (java) S 14590 14565 12926 0 -1 64 4 0 0 0 0 0 0 0 24 0 9 0 19665118 883634176 2337 996147200 134512640 134550932 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=14591/tid=14596] ppid=14590 vsize=862924 CPUtime=0
/proc/14591/task/14596/stat : 14596 (java) S 14590 14565 12926 0 -1 64 1 0 0 0 0 0 0 0 25 0 9 0 19665120 883634176 2337 996147200 134512640 134550932 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=14591/tid=14597] ppid=14590 vsize=862924 CPUtime=0.01
/proc/14591/task/14597/stat : 14597 (java) R 14590 14565 12926 0 -1 64 225 0 0 0 1 0 0 0 17 0 9 0 19665120 883634176 2337 996147200 134512640 134550932 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=14591/tid=14598] ppid=14590 vsize=862924 CPUtime=0
/proc/14591/task/14598/stat : 14598 (java) S 14590 14565 12926 0 -1 64 0 0 0 0 0 0 0 0 25 0 9 0 19665120 883634176 2337 996147200 134512640 134550932 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=14591/tid=14599] ppid=14590 vsize=862924 CPUtime=0
/proc/14591/task/14599/stat : 14599 (java) S 14590 14565 12926 0 -1 64 0 0 0 0 0 0 0 0 25 0 9 0 19665120 883634176 2337 996147200 134512640 134550932 4294955984 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 1 0 0
Current children cumulated CPU time (s) 1.11
Current children cumulated vsize (KiB) 885148

Child status: 0
Real time (s): 1.07349
CPU time (s): 1.17482
CPU user time (s): 0.975851
CPU system time (s): 0.198969
CPU usage (%): 109.439
Max. virtual memory (cumulated for all children) (KiB): 885148

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.975851
system time used= 0.198969
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 16731
page faults= 3
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 661
involuntary context switches= 313

runsolver used 0.005999 second user time and 0.010998 second system time

The end

Launcher Data 

Begin job on node58 at 2009-07-11 17:26:59
IDJOB=2060653
IDBENCH=53697
IDSOLVER=738
FILE ID=node58/2060653-1247326019
PBS_JOBID= 9506513
Free space on /tmp= 66228 MiB

SOLVER NAME= Sugar v1.14.6+picosat
BENCH NAME= CPAI08/csp/rcpsp/normalized-rcpsp20-14.xml
COMMAND LINE= DIR/sugar -c -vv -memlimit=MEMLIMIT -jar="DIR/sugar-v1-14-6.jar" -solver="DIR/picosat" -tmp="TMPDIR/temp" BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-2060653-1247326019/watcher-2060653-1247326019 -o /tmp/evaluation-result-2060653-1247326019/solver-2060653-1247326019 -C 1800 -W 2000 -M 900  HOME/sugar -c -vv -memlimit=900 -jar="HOME/sugar-v1-14-6.jar" -solver="HOME/picosat" -tmp="HOME/temp" HOME/instance-2060653-1247326019.xml

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 900 MiB
MAX NB THREAD= 0

MD5SUM BENCH= 591477a6650cad772ecfa66dbc882b20
RANDOM SEED=1441681126

node58.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		: 3000.234
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		: 3000.234
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:       1764008 kB
Buffers:         31172 kB
Cached:         191932 kB
SwapCached:        140 kB
Active:         118120 kB
Inactive:       120656 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1764008 kB
SwapTotal:     4192956 kB
SwapFree:      4192812 kB
Dirty:            1380 kB
Writeback:           0 kB
Mapped:          25328 kB
Slab:            38916 kB
Committed_AS:   122672 kB
PageTables:       1552 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= 66228 MiB
End job on node58 at 2009-07-11 17:27:00