Solver Name | Answer | Objective function | CPU time | Wall clock time |
---|---|---|---|---|
sat4jPseudoCP 2007-03-23 | UNSAT | 2.55261 | 1.61924 |
Name | normalized-PB06/OPT-SMALLINT/submitted-PB05/manquinho/ primes-dimacs-cnf/normalized-ssa2670-141.opb |
MD5SUM | bf686e12342472d00013af54a5ee9279 |
Bench Category | OPT-SMALLINT (optimisation, small integers) |
Best result obtained on this benchmark | UNSAT |
Best value of the objective obtained on this benchmark | |
Best CPU time to get the best result obtained on this benchmark | 0.089985 |
Has Objective Function | YES |
Satisfiable | NO |
(Un)Satisfiability was proved | YES |
Best value of the objective function | |
Optimality of the best value was proved | |
Number of variables | 1972 |
Total number of constraints | 3301 |
Number of constraints which are clauses | 3301 |
Number of constraints which are cardinality constraints (but not clauses) | 0 |
Number of constraints which are nor clauses,nor cardinality constraints | 0 |
Minimum length of a constraint | 1 |
Maximum length of a constraint | 5 |
Number of terms in the objective function | 1972 |
Biggest coefficient in the objective function | 1 |
Number of bits for the biggest coefficient in the objective function | 1 |
Sum of the numbers in the objective function | 1972 |
Number of bits of the sum of numbers in the objective function | 11 |
Biggest number in a constraint | 1 |
Number of bits of the biggest number in a constraint | 1 |
Biggest sum of numbers in a constraint | 1972 |
Number of bits of the biggest sum of numbers | 11 |
Number of products (including duplicates) | 0 |
Sum of products size (including duplicates) | 0 |
Number of different products | 0 |
Sum of products size | 0 |
0.07/0.14 c SAT4J: a SATisfiability library for Java (c) 2004-2006 Daniel Le Berre 0.07/0.14 c This is free software under the GNU LGPL licence. See www.sat4j.org for details. 0.07/0.14 c This software uses some libraries from the Jakarta project. See jakarta.apache.org for details. 0.07/0.15 c no version file found!!! 0.07/0.15 c sun.arch.data.model 32 0.07/0.15 c java.version 1.6.0 0.07/0.15 c os.name Linux 0.07/0.15 c os.version 2.6.9-22.EL.rootsmp 0.07/0.15 c os.arch i386 0.07/0.15 c Free memory 1651659224 0.07/0.15 c Max memory 1654456320 0.07/0.15 c Total memory 1654456320 0.07/0.15 c Number of processors 2 0.20/0.20 c Cutting planes based inference (org.sat4j.minisat.constraints.pb.PBSolver) 0.20/0.20 --- Begin Solver configuration --- 0.20/0.20 c Stops conflict analysis at the first Unique Implication Point 0.20/0.20 c org.sat4j.minisat.constraints.PBMaxClauseCardConstrDataStructure@691f36 0.20/0.20 c Learn all clauses as in MiniSAT 0.20/0.20 c claDecay=0.999 varDecay=0.95 conflictBoundIncFactor=10000.0 initConflictBound=100 0.20/0.20 c VSIDS like heuristics from MiniSAT using a heap 0.20/0.20 c No reason simplification 0.20/0.20 c --- End Solver configuration --- 0.20/0.20 c solving /tmp/evaluation/364826-1177043573/instance-364826-1177043573.opb 0.20/0.20 c reading problem ... 1.17/0.85 c ... done. Wall clock time 0.649s. 1.17/0.85 c CPU time (experimental) 0.62s. 1.17/0.85 c #vars 1972 1.17/0.85 c #constraints 3288 2.54/1.60 c starts : 2 2.54/1.60 c conflicts : 217 2.54/1.60 c decisions : 606 2.54/1.60 c propagations : 45146 2.54/1.60 c inspects : 76650 2.54/1.60 c learnt literals : 0 2.54/1.60 c learnt binary clauses : 18 2.54/1.60 c learnt ternary clauses : 8 2.54/1.60 c learnt clauses : 216 2.54/1.60 c root simplifications : 0 2.54/1.60 c removed literals (reason simplification) : 0 2.54/1.60 c reason swapping (by a shorter reason) : 0 2.54/1.60 c Calls to reduceDB : 0 2.54/1.60 c speed (decisions/second) : 865.7142857142858 2.54/1.60 c non guided choices 0 2.54/1.60 s UNSATISFIABLE 2.54/1.60 c Total wall clock time (ms): 1.399
ERROR: no interpretation found !
runsolver version 3.2.2 (c) roussel@cril.univ-artois.fr command line: runsolver --timestamp -w ROOT/results/node50/watcher-364826-1177043573 -o ROOT/results/node50/solver-364826-1177043573 -C 1800 -W 3600 -M 1800 --output-limit 1,15 java -server -Xms1600M -Xmx1600M -jar /tmp/evaluation/364826-1177043573/sat4jPseudoCP.jar /tmp/evaluation/364826-1177043573/instance-364826-1177043573.opb 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): 3600 seconds Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 1843200 KiB Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 1894400 KiB Solver output will be limited to a maximum of 15728640 bytes. The first 1048576 bytes and the last 14680064 bytes will be preserved Current StackSize limit: 10240 KiB [startup+0 s] /proc/loadavg: 0.92 0.97 0.98 2/64 13312 /proc/meminfo: memFree=1773344/2055920 swapFree=4183800/4192956 [pid=13312] ppid=13310 vsize=152 CPUtime=0 /proc/13312/stat : 13312 (java) D 13310 13312 12246 0 -1 0 42 0 0 0 0 0 0 0 19 0 1 0 59202476 155648 26 18446744073709551615 134512640 134550740 4294956592 18446744073709551615 7918372 0 2147483391 4096 0 18446744072099781622 0 0 17 1 0 0 /proc/13312/statm: 38 26 19 9 0 4 0 [startup+0.073858 s] /proc/loadavg: 0.92 0.97 0.98 2/64 13312 /proc/meminfo: memFree=1773344/2055920 swapFree=4183800/4192956 [pid=13312] ppid=13310 vsize=1777708 CPUtime=0.05 /proc/13312/stat : 13312 (java) S 13310 13312 12246 0 -1 0 3736 0 1 0 3 2 0 0 18 0 7 0 59202476 1820372992 3478 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 0 0 7368 18446744073709551615 0 0 17 1 0 0 /proc/13312/statm: 444427 3478 1082 9 0 442063 0 Current children cumulated CPU time (s) 0.05 Current children cumulated vsize (KiB) 1777708 [startup+0.101859 s] /proc/loadavg: 0.92 0.97 0.98 2/64 13312 /proc/meminfo: memFree=1773344/2055920 swapFree=4183800/4192956 [pid=13312] ppid=13310 vsize=1780108 CPUtime=0.07 /proc/13312/stat : 13312 (java) S 13310 13312 12246 0 -1 0 3972 0 1 0 5 2 0 0 18 0 12 0 59202476 1822830592 3713 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 0 0 23759 18446744073709551615 0 0 17 1 0 0 /proc/13312/statm: 445027 3713 1122 9 0 442646 0 Current children cumulated CPU time (s) 0.07 Current children cumulated vsize (KiB) 1780108 [startup+0.301877 s] /proc/loadavg: 0.92 0.97 0.98 2/64 13312 /proc/meminfo: memFree=1773344/2055920 swapFree=4183800/4192956 [pid=13312] ppid=13310 vsize=1781420 CPUtime=0.32 /proc/13312/stat : 13312 (java) S 13310 13312 12246 0 -1 0 5078 0 1 0 29 3 0 0 18 0 12 0 59202476 1824174080 4816 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 0 0 23759 18446744073709551615 0 0 17 1 0 0 /proc/13312/statm: 445355 4816 1264 9 0 442967 0 Current children cumulated CPU time (s) 0.32 Current children cumulated vsize (KiB) 1781420 [startup+0.701913 s] /proc/loadavg: 0.92 0.97 0.98 2/64 13312 /proc/meminfo: memFree=1773344/2055920 swapFree=4183800/4192956 [pid=13312] ppid=13310 vsize=1783116 CPUtime=0.98 /proc/13312/stat : 13312 (java) S 13310 13312 12246 0 -1 0 7105 0 1 0 94 4 0 0 18 0 12 0 59202476 1825910784 6608 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 0 0 23759 18446744073709551615 0 0 17 1 0 0 /proc/13312/statm: 445779 6608 1301 9 0 443391 0 Current children cumulated CPU time (s) 0.98 Current children cumulated vsize (KiB) 1783116 [startup+1.50298 s] /proc/loadavg: 0.92 0.97 0.98 4/77 13325 /proc/meminfo: memFree=1747192/2055920 swapFree=4183800/4192956 [pid=13312] ppid=13310 vsize=1786200 CPUtime=2.41 /proc/13312/stat : 13312 (java) S 13310 13312 12246 0 -1 0 12522 0 1 0 234 7 0 0 18 0 13 0 59202476 1829068800 9221 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 0 0 23759 18446744073709551615 0 0 17 1 0 0 /proc/13312/statm: 446550 9222 1314 9 0 444162 0 [pid=13312/tid=13314] ppid=13310 vsize=1786200 CPUtime=0.99 /proc/13312/task/13314/stat : 13314 (java) R 13310 13312 12246 0 -1 64 7402 0 1 0 94 5 0 0 19 0 13 0 59202477 1829068800 9222 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4109550798 0 4 0 23759 0 0 0 -1 1 0 0 [pid=13312/tid=13315] ppid=13310 vsize=1786200 CPUtime=0 /proc/13312/task/13315/stat : 13315 (java) S 13310 13312 12246 0 -1 64 2 0 0 0 0 0 0 0 19 0 13 0 59202479 1829068800 9223 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13316] ppid=13310 vsize=1786200 CPUtime=0 /proc/13312/task/13316/stat : 13316 (java) S 13310 13312 12246 0 -1 64 0 0 0 0 0 0 0 0 20 0 13 0 59202479 1829068800 9223 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0 [pid=13312/tid=13317] ppid=13310 vsize=1786200 CPUtime=0 /proc/13312/task/13317/stat : 13317 (java) S 13310 13312 12246 0 -1 64 2 0 0 0 0 0 0 0 16 0 13 0 59202481 1829068800 9223 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 0 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13318] ppid=13310 vsize=1786200 CPUtime=0 /proc/13312/task/13318/stat : 13318 (java) S 13310 13312 12246 0 -1 64 10 0 0 0 0 0 0 0 22 0 13 0 59202482 1829068800 9223 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13319] ppid=13310 vsize=1786200 CPUtime=0 /proc/13312/task/13319/stat : 13319 (java) S 13310 13312 12246 0 -1 64 4 0 0 0 0 0 0 0 23 0 13 0 59202482 1829068800 9223 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13320] ppid=13310 vsize=1786200 CPUtime=0 /proc/13312/task/13320/stat : 13320 (java) S 13310 13312 12246 0 -1 64 1 0 0 0 0 0 0 0 24 0 13 0 59202485 1829068800 9224 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13321] ppid=13310 vsize=1786200 CPUtime=0.7 /proc/13312/task/13321/stat : 13321 (java) R 13310 13312 12246 0 -1 64 2892 0 0 0 69 1 0 0 17 0 13 0 59202485 1829068800 9225 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 103336887 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13322] ppid=13310 vsize=1786200 CPUtime=0.69 /proc/13312/task/13322/stat : 13322 (java) S 13310 13312 12246 0 -1 64 1507 0 0 0 69 0 0 0 17 0 13 0 59202485 1829068800 9225 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0 [pid=13312/tid=13323] ppid=13310 vsize=1786200 CPUtime=0 /proc/13312/task/13323/stat : 13323 (java) S 13310 13312 12246 0 -1 64 1 0 0 0 0 0 0 0 25 0 13 0 59202485 1829068800 9226 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13324] ppid=13310 vsize=1786200 CPUtime=0 /proc/13312/task/13324/stat : 13324 (java) S 13310 13312 12246 0 -1 64 0 0 0 0 0 0 0 0 15 0 13 0 59202486 1829068800 9227 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13325] ppid=13310 vsize=1786200 CPUtime=0 /proc/13312/task/13325/stat : 13325 (java) S 13310 13312 12246 0 -1 64 4 0 0 0 0 0 0 0 19 0 13 0 59202567 1829068800 9227 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 Current children cumulated CPU time (s) 2.41 Current children cumulated vsize (KiB) 1786200 Solver just ended. Dumping a history of the last processes samples [startup+1.60317 s] /proc/loadavg: 0.92 0.97 0.98 4/77 13325 /proc/meminfo: memFree=1747192/2055920 swapFree=4183800/4192956 [pid=13312] ppid=13310 vsize=1785824 CPUtime=2.54 /proc/13312/stat : 13312 (java) S 13310 13312 12246 0 -1 0 14483 0 1 0 246 8 0 0 18 0 12 0 59202476 1828683776 11104 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 0 0 23759 18446744073709551615 0 0 17 1 0 0 /proc/13312/statm: 446456 11104 1315 9 0 444068 0 [pid=13312/tid=13314] ppid=13310 vsize=1785824 CPUtime=1.08 /proc/13312/task/13314/stat : 13314 (java) R 13310 13312 12246 0 -1 64 9307 0 1 0 103 5 0 0 18 0 12 0 59202477 1828683776 11104 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0 [pid=13312/tid=13315] ppid=13310 vsize=1785824 CPUtime=0 /proc/13312/task/13315/stat : 13315 (java) S 13310 13312 12246 0 -1 64 2 0 0 0 0 0 0 0 19 0 12 0 59202479 1828683776 11104 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13316] ppid=13310 vsize=1785824 CPUtime=0 /proc/13312/task/13316/stat : 13316 (java) S 13310 13312 12246 0 -1 64 0 0 0 0 0 0 0 0 20 0 12 0 59202479 1828683776 11104 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0 [pid=13312/tid=13317] ppid=13310 vsize=1785824 CPUtime=0 /proc/13312/task/13317/stat : 13317 (java) S 13310 13312 12246 0 -1 64 2 0 0 0 0 0 0 0 16 0 12 0 59202481 1828683776 11104 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 0 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13318] ppid=13310 vsize=1785824 CPUtime=0 /proc/13312/task/13318/stat : 13318 (java) S 13310 13312 12246 0 -1 64 10 0 0 0 0 0 0 0 22 0 12 0 59202482 1828683776 11104 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13319] ppid=13310 vsize=1785824 CPUtime=0 /proc/13312/task/13319/stat : 13319 (java) S 13310 13312 12246 0 -1 64 4 0 0 0 0 0 0 0 23 0 12 0 59202482 1828683776 11105 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13320] ppid=13310 vsize=1785824 CPUtime=0 /proc/13312/task/13320/stat : 13320 (java) S 13310 13312 12246 0 -1 64 1 0 0 0 0 0 0 0 24 0 12 0 59202485 1828683776 11105 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13321] ppid=13310 vsize=1785824 CPUtime=0.73 /proc/13312/task/13321/stat : 13321 (java) S 13310 13312 12246 0 -1 64 2945 0 0 0 72 1 0 0 16 0 12 0 59202485 1828683776 11105 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13322] ppid=13310 vsize=1785824 CPUtime=0.7 /proc/13312/task/13322/stat : 13322 (java) S 13310 13312 12246 0 -1 64 1507 0 0 0 70 0 0 0 16 0 12 0 59202485 1828683776 11105 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0 [pid=13312/tid=13323] ppid=13310 vsize=1785824 CPUtime=0 /proc/13312/task/13323/stat : 13323 (java) S 13310 13312 12246 0 -1 64 1 0 0 0 0 0 0 0 25 0 12 0 59202485 1828683776 11106 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 [pid=13312/tid=13324] ppid=13310 vsize=1785824 CPUtime=0 /proc/13312/task/13324/stat : 13324 (java) S 13310 13312 12246 0 -1 64 0 0 0 0 0 0 0 0 15 0 12 0 59202486 1828683776 11106 18446744073709551615 134512640 134550740 4294956448 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0 Current children cumulated CPU time (s) 2.54 Current children cumulated vsize (KiB) 1785824 Child status: 20 Real time (s): 1.61924 CPU time (s): 2.55261 CPU user time (s): 2.46263 CPU system time (s): 0.089986 CPU usage (%): 157.643 Max. virtual memory (cumulated for all children) (KiB): 1786768 getrusage(RUSAGE_CHILDREN,...) data: user time used= 2.46263 system time used= 0.089986 maximum resident set size= 0 integral shared memory size= 0 integral unshared data size= 0 integral unshared stack size= 0 page reclaims= 14490 page faults= 1 swaps= 0 block input operations= 0 block output operations= 0 messages sent= 0 messages received= 0 signals received= 0 voluntary context switches= 500 involuntary context switches= 410 runsolver used 0.003999 second user time and 0.007998 second system time The end
Begin job on node50 on Fri Apr 20 04:32:53 UTC 2007 IDJOB= 364826 IDBENCH= 2156 IDSOLVER= 160 FILE ID= node50/364826-1177043573 PBS_JOBID= 4640121 Free space on /tmp= 66504 MiB SOLVER NAME= sat4jPseudoCP 2007-03-23 BENCH NAME= HOME/pub/bench/PB06//final/normalized-PB06/OPT-SMALLINT/submitted-PB05/manquinho/primes-dimacs-cnf/normalized-ssa2670-141.opb COMMAND LINE= java -server -Xms1600M -Xmx1600M -jar /tmp/evaluation/364826-1177043573/sat4jPseudoCP.jar /tmp/evaluation/364826-1177043573/instance-364826-1177043573.opb RUNSOLVER COMMAND LINE= runsolver --timestamp -w ROOT/results/node50/watcher-364826-1177043573 -o ROOT/results/node50/solver-364826-1177043573 -C 1800 -W 3600 -M 1800 --output-limit 1,15 java -server -Xms1600M -Xmx1600M -jar /tmp/evaluation/364826-1177043573/sat4jPseudoCP.jar /tmp/evaluation/364826-1177043573/instance-364826-1177043573.opb META MD5SUM SOLVER= 592978c395d7dcf045996aed0652cb30 MD5SUM BENCH= bf686e12342472d00013af54a5ee9279 RANDOM SEED= 809058250 TIME LIMIT= 1800 seconds MEMORY LIMIT= 1800 MiB Linux node50.alineos.net 2.6.9-22.EL.rootsmp #1 SMP Mon Oct 3 08:59:52 CEST 2005 x86_64 x86_64 x86_64 GNU/Linux /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 : 3000.232 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 : 3000.232 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: 1773752 kB Buffers: 29292 kB Cached: 182460 kB SwapCached: 2856 kB Active: 84156 kB Inactive: 146380 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 2055920 kB LowFree: 1773752 kB SwapTotal: 4192956 kB SwapFree: 4183800 kB Dirty: 3820 kB Writeback: 0 kB Mapped: 15564 kB Slab: 37556 kB Committed_AS: 1202484 kB PageTables: 1460 kB VmallocTotal: 536870911 kB VmallocUsed: 264952 kB VmallocChunk: 536605679 kB HugePages_Total: 0 HugePages_Free: 0 Hugepagesize: 2048 kB Free space on /tmp at the end= 66504 MiB End job on node50 on Fri Apr 20 04:32:55 UTC 2007