Trace number 4499474

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
IPBHS-SCIP 2025-06-09OPT-162 32.6423 32.7742

DiagnosticValue
CARDINALITY_CORES_IN_OPTIMIZER
CLAUSAL_CORES_IN_OPTIMIZER
CORES_EXTRACTED
CORES_IN_OPTIMIZER
ITERATIONS
PB_CORES_IN_OPTIMIZER
SIS
SIS_OUT_OF_BUDGET
SIS_SAT
SIS_UNSAT
TIME_EXTRACT_CORES
TIME_OPTIMIZE
TIME_SIS

General information on the benchmark

NamePB24/normalized-PB09/OPT-LIN/featureSubscription/
normalized-50-250-false-45-90-4-8000opt.opb
MD5SUM574dfa7826774941f0083ceba62feb56
Bench CategoryOPT-LIN (optimization problem, linear constraints, no OPT/UNSAT certificate)
Best result obtained on this benchmarkOPT
Best value of the objective obtained on this benchmark-162
Best CPU time to get the best result obtained on this benchmark2.5139
Has Objective FunctionYES
Satisfiable
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of variables2025
Total number of constraints62275
Number of constraints which are clauses62275
Number of constraints which are cardinality constraints (but not clauses)0
Number of constraints which are nor clauses,nor cardinality constraints0
Minimum length of a constraint2
Maximum length of a constraint3
Number of terms in the objective function 135
Biggest coefficient in the objective function 4
Number of bits for the biggest coefficient in the objective function 3
Sum of the numbers in the objective function 341
Number of bits of the sum of numbers in the objective function 9
Biggest number in a constraint 4
Number of bits of the biggest number in a constraint 3
Biggest sum of numbers in a constraint 341
Number of bits of the biggest sum of numbers9
Number of products (including duplicates)0
Sum of products size (including duplicates)0
Number of different products0
Sum of products size0

Solver Data 

0.00/0.01	c initialize IPBHS solver
0.00/0.01	c IPBHS 0.0.0 beta (8d0f613-dirty, Jun  3 2025 11:36:14), compiled with satsolvers: , optimizers: , GreedyOptimizer, SCIP 10.0.0, RoundingSat 2, , , pbsolvers: RoundingSat 2, BreakID 0.0.0
0.00/0.01	c optimizer = "scip"
0.00/0.01	c pbsolver = "roundingsat"
0.00/0.01	c use separate pbsolver for SIS
0.00/0.01	c load symmetries from file ""
0.00/0.01	c set time limit for symmetry computation to 100 seconds.
0.00/0.01	c set interchangeable summation variable limit to 3
0.00/0.01	c set sym compact max subset size to 5
0.00/0.01	c set explicit symmetry matrix usage to 1
0.00/0.01	c sym budget explicit to 100
0.00/0.01	c sym budget explicit lits to 6000
0.00/0.01	c sym budget compact to 100
0.00/0.01	c sym budget compact lits to 6000
0.00/0.01	c sym budget common to 0
0.00/0.01	c sym budget common lits to 0
0.00/0.01	c set sym generation to 's'
0.00/0.01	c set abstraction set creation to 10 iterations without LB change
0.00/0.01	c set abstraction set inputs to 0
0.00/0.01	c set abstraction set cluster min size to 2
0.00/0.01	c set abstraction set cluster max size to 100000000
0.00/0.01	c set abstraction set cluster activation limit to 2
0.00/0.01	c enable abstraction set require equal cost
0.00/0.01	c set abstraction set assumptions to 0
0.00/0.01	c set abstraction set constraint type to 0
0.00/0.01	c set abstract core extraction strategy to b
0.00/0.01	c set core extraction strategy to 2
0.00/0.01	c set core extraction shuffles 10
0.00/0.01	c set cores per iteration to 5
0.00/0.01	c set optimizer bound usage strategy to 2
0.00/0.01	c set optimizer max non-optimal iterations to 1000
0.00/0.01	c set small core cardinality limit to 2
0.00/0.01	c set max coef in cores to 1000000000
0.00/0.01	c set core processing techniques to 4095
0.00/0.01	c set SIS iterations to 5
0.00/0.01	c set SIS budget abs to 1000
0.00/0.01	c set SIS budget rel to 0.05
0.68/0.71	c limit for coefficient in constraints and objective to 1000000000
0.68/0.71	c will solve HOME/instance-4499474-1751480387.opb
0.68/0.71	c [0] will start solving
5.86/5.90	c [0.01] solve iteration 1, LB=-341, UB=1
5.86/5.90	c [0.38] solve iteration 2, LB=-341, UB=-93
5.86/5.90	c [0.54] solve iteration 3, LB=-220, UB=-93
5.86/5.90	c [0.68] solve iteration 4, LB=-216, UB=-107
5.86/5.90	c [0.79] solve iteration 5, LB=-214, UB=-107
5.86/5.90	c [0.95] solve iteration 6, LB=-214, UB=-122
5.86/5.90	c [1.07] solve iteration 7, LB=-211, UB=-122
5.86/5.90	c [1.18] solve iteration 8, LB=-211, UB=-122
5.86/5.90	c [1.29] solve iteration 9, LB=-210, UB=-128
5.86/5.90	c [1.41] solve iteration 10, LB=-210, UB=-128
5.86/5.90	c [1.53] solve iteration 11, LB=-209, UB=-129
5.86/5.90	c [1.63] solve iteration 12, LB=-209, UB=-129
5.86/5.90	c [1.73] solve iteration 13, LB=-207, UB=-129
5.86/5.90	c [1.82] solve iteration 14, LB=-207, UB=-144
5.86/5.90	c [2.3] solve iteration 15, LB=-207, UB=-144
5.86/5.90	c [2.87] solve iteration 16, LB=-207, UB=-145
5.86/5.90	c [3.42] solve iteration 17, LB=-206, UB=-145
5.86/5.90	c [3.96] solve iteration 18, LB=-206, UB=-145
5.86/5.90	c [4.57] solve iteration 19, LB=-205, UB=-155
8.65/8.74	c [5.58] solve iteration 20, LB=-205, UB=-155
8.65/8.74	c [6.25] solve iteration 21, LB=-205, UB=-156
8.65/8.74	c [6.81] solve iteration 22, LB=-205, UB=-156
8.65/8.74	c [7.43] solve iteration 23, LB=-205, UB=-156
9.64/9.70	c [8.39] solve iteration 24, LB=-205, UB=-156
10.96/11.10	c [9.77] solve iteration 25, LB=-205, UB=-156
12.64/12.74	c [11.34] solve iteration 26, LB=-204, UB=-156
14.43/14.59	c [12.62] solve iteration 27, LB=-204, UB=-156
14.43/14.59	c [13.23] solve iteration 28, LB=-204, UB=-156
16.32/16.46	c [14.6] solve iteration 29, LB=-204, UB=-156
16.32/16.46	c [15.17] solve iteration 30, LB=-204, UB=-156
17.61/17.76	c [16.36] solve iteration 31, LB=-204, UB=-156
18.81/18.99	c [17.6] solve iteration 32, LB=-204, UB=-157
20.60/20.73	c [19.39] solve iteration 33, LB=-164, UB=-160
22.20/22.33	c [20.9] solve iteration 34, LB=-164, UB=-160
23.30/23.42	c [22.03] solve iteration 35, LB=-164, UB=-160
25.00/25.13	c [23.68] solve iteration 36, LB=-164, UB=-160
26.78/26.93	c [25.46] solve iteration 37, LB=-164, UB=-160
28.48/28.63	c [27.19] solve iteration 38, LB=-164, UB=-160
30.07/30.26	c [28.79] solve iteration 39, LB=-164, UB=-160
31.46/31.63	c [30.15] solve iteration 40, LB=-164, UB=-161
32.56/32.76	c [31.85] LB=UB after core extraction
32.56/32.76	c [31.85] instance solved in 31.85s (optimization: 27.52s, core-extraction: 2.77s, SIS: 0.57s), 40 iterations, LB=-162, UB=-162, 
32.56/32.76	d ITERATIONS 40
32.56/32.76	d SIS 7
32.56/32.76	d SIS_SAT 4
32.56/32.76	d SIS_UNSAT 0
32.56/32.76	d SIS_OUT_OF_BUDGET 3
32.56/32.76	d CORES_EXTRACTED 1900
32.56/32.76	d CORES_IN_OPTIMIZER 755
32.56/32.76	d CLAUSAL_CORES_IN_OPTIMIZER 755
32.56/32.76	d CARDINALITY_CORES_IN_OPTIMIZER 0
32.56/32.76	d PB_CORES_IN_OPTIMIZER 0
32.56/32.76	d TIME_EXTRACT_CORES 2.770000
32.56/32.76	d TIME_OPTIMIZE 27.520000
32.56/32.76	d TIME_SIS 0.570000
32.56/32.76	c solve_time: 31.850000
32.56/32.76	s OPTIMUM FOUND
32.56/32.76	o -162
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Verifier Data 

OK	-162

Watcher Data 

runsolver version 3.4.2 (svn: 4680) Copyright (C) 2010-2013 Olivier ROUSSEL

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.

NUMA information:
  number of nodes: 2
  memory of node 0: 63837 MiB (58091 MiB free)
  memory of node 1: 64465 MiB (62269 MiB free)
  node distances:
     10  21
     21  10

command line: BIN/runsolver --timestamp -w /tmp/evaluation-result-4499474-1751480387/watcher-4499474-1751480387 -o /tmp/evaluation-result-4499474-1751480387/solver-4499474-1751480387 -C 3600 -W 3700 -M 31000 --bin-var /tmp/runsolver-exch-nodeC004-1751480338-67942 --watchdog 3760 ./ipbhs_scip HOME/instance-4499474-1751480387.opb --optimizer scip --max-coef 1000000000 

running on 2 cores: 1,3

CPU governors:
  performance: 1 3

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 3600 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 3630 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 3700 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 31744000 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 31795200 KiB
Linux 5.14.0-503.14.1.el9_5.x86_64
Starting watchdog thread
Current StackSize limit: 8192 KiB

solver pid=68090, runsolver pid=68087

[startup+0.100071 s]*
/proc/loadavg: 2.74 2.44 4.33 5/251 68091
/proc/meminfo: memFree=122991272/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=714064 memory=299868 CPUtime=0.1 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 981 0 0 0 3 7 0 0 20 0 1 0 63717909 731201536 74967 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 0 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 178516 74967 1600 2790 0 171941 0
Current children cumulated CPU time: 0.1 s
Current children cumulated vsize: 714064 KiB
Current children cumulated memory: 299868 KiB

[startup+0.213119 s]*
/proc/loadavg: 2.74 2.44 4.33 5/251 68091
/proc/meminfo: memFree=122622632/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=714064 memory=679132 CPUtime=0.21 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 1274 0 0 0 6 15 0 0 20 0 1 0 63717909 731201536 169783 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 0 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 178516 169783 1600 2790 0 171941 0
Current children cumulated CPU time: 0.21 s
Current children cumulated vsize: 714064 KiB
Current children cumulated memory: 679132 KiB

[startup+0.312956 s]*
/proc/loadavg: 2.74 2.44 4.33 5/251 68091
/proc/meminfo: memFree=122581672/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=720336 memory=685844 CPUtime=0.31 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 3566 0 0 0 15 16 0 0 20 0 1 0 63717909 737624064 171461 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 0 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 180084 171461 1600 2790 0 173509 0
Current children cumulated CPU time: 0.31 s
Current children cumulated vsize: 720336 KiB
Current children cumulated memory: 685844 KiB

[startup+0.700266 s]
/proc/loadavg: 2.74 2.44 4.33 5/251 68091
/proc/meminfo: memFree=122577576/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=726292 memory=699712 CPUtime=0.68 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 5400 0 0 0 38 30 0 0 20 0 1 0 63717909 743723008 174928 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 0 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 181573 174928 1696 2790 0 174998 0
Current children cumulated CPU time: 0.68 s
Current children cumulated vsize: 726292 KiB
Current children cumulated memory: 699712 KiB

[startup+1.50033 s]
/proc/loadavg: 2.74 2.44 4.33 5/251 68091
/proc/meminfo: memFree=122573796/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=740296 memory=720832 CPUtime=1.48 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 8809 0 0 0 116 32 0 0 20 0 1 0 63717909 758063104 180208 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 0 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 185074 180208 3712 2790 0 178499 0
Current children cumulated CPU time: 1.48 s
Current children cumulated vsize: 740296 KiB
Current children cumulated memory: 720832 KiB

[startup+3.11366 s]
/proc/loadavg: 2.74 2.44 4.33 5/251 68091
/proc/meminfo: memFree=122502316/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=787348 memory=768320 CPUtime=3.09 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 20632 0 0 0 275 34 0 0 20 0 1 0 63717909 806244352 192080 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 196837 192080 3744 2790 0 190262 0
Current children cumulated CPU time: 3.09 s
Current children cumulated vsize: 787348 KiB
Current children cumulated memory: 768320 KiB

[startup+6.30024 s]
/proc/loadavg: 2.84 2.47 4.32 5/251 68091
/proc/meminfo: memFree=122478880/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=807380 memory=787992 CPUtime=6.27 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 26307 0 0 0 591 36 0 0 20 0 1 0 63717909 826757120 196998 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 0 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 201845 196998 3744 2790 0 195270 0
Current children cumulated CPU time: 6.27 s
Current children cumulated vsize: 807380 KiB
Current children cumulated memory: 787992 KiB

[startup+12.7003 s]
/proc/loadavg: 3.01 2.51 4.33 5/251 68136
/proc/meminfo: memFree=123185716/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=810632 memory=792488 CPUtime=12.64 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 27856 0 0 0 1227 37 0 0 20 0 1 0 63717909 830087168 198122 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 202658 198122 3744 2790 0 196083 0
Current children cumulated CPU time: 12.64 s
Current children cumulated vsize: 810632 KiB
Current children cumulated memory: 792488 KiB

[startup+25.5003 s]
/proc/loadavg: 3.23 2.58 4.32 5/251 68136
/proc/meminfo: memFree=123114624/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=818868 memory=799412 CPUtime=25.38 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 31651 0 0 0 2500 38 0 0 20 0 1 0 63717909 838520832 199853 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 204717 199853 3744 2790 0 198142 0
Current children cumulated CPU time: 25.38 s
Current children cumulated vsize: 818868 KiB
Current children cumulated memory: 799412 KiB

[startup+32.7741 s]
# the end of solver process 68090 was just reported to runsolver
# Child status: 0

# cumulated CPU time of all completed processes:  user=32.2398 s, system=0.402493 s

Solver just ended.
??? end of watcher thread
Dumping a history of the last processes samples

[startup+25.6003 s]
/proc/loadavg: 3.23 2.58 4.32 5/251 68136
/proc/meminfo: memFree=123114624/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=818868 memory=799412 CPUtime=25.48 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 31651 0 0 0 2510 38 0 0 20 0 1 0 63717909 838520832 199853 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 204717 199853 3744 2790 0 198142 0
Current children cumulated CPU time: 25.48 s
Current children cumulated vsize: 818868 KiB
Current children cumulated memory: 799412 KiB

[startup+28.8003 s]
/proc/loadavg: 3.23 2.58 4.32 5/251 68136
/proc/meminfo: memFree=123110844/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=818868 memory=800308 CPUtime=28.68 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 31882 0 0 0 2829 39 0 0 20 0 1 0 63717909 838520832 200077 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 204717 200077 3744 2790 0 198142 0
Current children cumulated CPU time: 28.68 s
Current children cumulated vsize: 818868 KiB
Current children cumulated memory: 800308 KiB

[startup+30.4003 s]
/proc/loadavg: 3.37 2.62 4.33 5/251 68137
/proc/meminfo: memFree=123103032/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=818868 memory=800308 CPUtime=30.27 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 31882 0 0 0 2988 39 0 0 20 0 1 0 63717909 838520832 200077 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 204717 200077 3744 2790 0 198142 0
Current children cumulated CPU time: 30.27 s
Current children cumulated vsize: 818868 KiB
Current children cumulated memory: 800308 KiB

[startup+32.0003 s]*
/proc/loadavg: 3.37 2.62 4.33 5/251 68137
/proc/meminfo: memFree=123102780/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=818868 memory=800308 CPUtime=31.87 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 31882 0 0 0 3148 39 0 0 20 0 1 0 63717909 838520832 200077 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 204717 200077 3744 2790 0 198142 0
Current children cumulated CPU time: 31.87 s
Current children cumulated vsize: 818868 KiB
Current children cumulated memory: 800308 KiB

[startup+32.4003 s]
/proc/loadavg: 3.37 2.62 4.33 5/251 68137
/proc/meminfo: memFree=123102780/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=818868 memory=800308 CPUtime=32.26 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 31882 0 0 0 3187 39 0 0 20 0 1 0 63717909 838520832 200077 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 204717 200077 3744 2790 0 198142 0
Current children cumulated CPU time: 32.26 s
Current children cumulated vsize: 818868 KiB
Current children cumulated memory: 800308 KiB

[startup+32.6003 s]
/proc/loadavg: 3.37 2.62 4.33 5/251 68137
/proc/meminfo: memFree=123102780/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=818868 memory=800308 CPUtime=32.46 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 31882 0 0 0 3207 39 0 0 20 0 1 0 63717909 838520832 200077 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 204717 200077 3744 2790 0 198142 0
Current children cumulated CPU time: 32.46 s
Current children cumulated vsize: 818868 KiB
Current children cumulated memory: 800308 KiB

[startup+32.7003 s]
/proc/loadavg: 3.37 2.62 4.33 5/251 68137
/proc/meminfo: memFree=123102780/131382116 swapFree=33010160/33010684
[pid=68090] ppid=68087 vsize=818868 memory=800308 CPUtime=32.56 cores=1,3
/proc/68090/stat : 68090 (ipbhs_scip) R 68087 68090 67930 0 -1 4194304 31882 0 0 0 3217 39 0 0 20 0 1 0 63717909 838520832 200077 18446744073709551615 94743328763904 94743340190301 140736850222656 0 0 0 0 0 2 0 0 0 17 1 0 0 0 0 0 94743342325976 94743342370994 94743372398592 140736850225554 140736850225673 140736850225673 140736850231275 0
/proc/68090/statm: 204717 200077 3744 2790 0 198142 0
Current children cumulated CPU time: 32.56 s
Current children cumulated vsize: 818868 KiB
Current children cumulated memory: 800308 KiB

Child status: 0

Real time (s): 32.7742
CPU time (s): 32.6423
CPU user time (s): 32.2398
CPU system time (s): 0.402493
CPU usage (%): 99.5975
Max. virtual memory (cumulated for all children) (KiB): 820104
Max. memory (cumulated for all children) (KiB): 800808

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 32.2398
system time used= 0.402493
maximum resident set size= 800808
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 31888
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= 70
involuntary context switches= 46


# summary of solver processes directly reported to runsolver:
#   pid: 68090
#   total CPU time (s): 32.6423
#   total CPU user time (s): 32.2398
#   total CPU system time (s): 0.402493

??? join timestamper begins
??? join timestamper ends
??? end of timestamper thread
runsolver used 0.209276 second user time and 0.37127 second system time

The end

Launcher Data 

Begin job on nodeC004 at 2025-07-02 20:19:47
IDJOB=4499474
IDBENCH=148780
IDSOLVER=3335
FILE ID=nodeC004/4499474-1751480387
RUNJOBID= nodeC004-1751480338-67942
SLURM_JOB_ID= 9598522
Free space on /tmp= 431516 MiB

SOLVER NAME= IPBHS-SCIP 2025-06-09
BENCH NAME= PB24/normalized-PB09/OPT-LIN/featureSubscription/normalized-50-250-false-45-90-4-8000opt.opb
COMMAND LINE= ./ipbhs_scip BENCHNAME --optimizer scip --max-coef 1000000000
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-4499474-1751480387/watcher-4499474-1751480387 -o /tmp/evaluation-result-4499474-1751480387/solver-4499474-1751480387 -C 3600 -W 3700 -M 31000 --bin-var /tmp/runsolver-exch-nodeC004-1751480338-67942 --watchdog 3760  ./ipbhs_scip HOME/instance-4499474-1751480387.opb --optimizer scip --max-coef 1000000000

TIME LIMIT= 3600 seconds
MEMORY LIMIT= 31000 MiB
NBCORE= 2

MD5SUM BENCH= 574dfa7826774941f0083ceba62feb56
RANDOM SEED=1395813012

nodeC004 Linux 5.14.0-503.14.1.el9_5.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Nov 15 12:04:32 UTC 2024

/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:
performance

/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 79
model name	: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
stepping	: 1
microcode	: 0xb00001f
cpu MHz		: 3662.968
cache size	: 15360 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 20
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 pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 pti tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap intel_pt xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts vnmi
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs pml ept_violation_ve
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit mmio_stale_data
bogomips	: 6983.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 79
model name	: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
stepping	: 1
microcode	: 0xb00001f
cpu MHz		: 1197.214
cache size	: 15360 KB
physical id	: 1
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 16
initial apicid	: 16
fpu		: yes
fpu_exception	: yes
cpuid level	: 20
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 pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 pti tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap intel_pt xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts vnmi
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs pml ept_violation_ve
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit mmio_stale_data
bogomips	: 6983.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 79
model name	: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
stepping	: 1
microcode	: 0xb00001f
cpu MHz		: 1197.384
cache size	: 15360 KB
physical id	: 0
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 2
initial apicid	: 2
fpu		: yes
fpu_exception	: yes
cpuid level	: 20
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 pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 pti tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap intel_pt xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts vnmi
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs pml ept_violation_ve
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit mmio_stale_data
bogomips	: 6983.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 79
model name	: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
stepping	: 1
microcode	: 0xb00001f
cpu MHz		: 3700.000
cache size	: 15360 KB
physical id	: 1
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 18
initial apicid	: 18
fpu		: yes
fpu_exception	: yes
cpuid level	: 20
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 pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 pti tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap intel_pt xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts vnmi
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs pml ept_violation_ve
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit mmio_stale_data
bogomips	: 6983.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:

processor	: 4
vendor_id	: GenuineIntel
cpu family	: 6
model		: 79
model name	: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
stepping	: 1
microcode	: 0xb00001f
cpu MHz		: 3662.671
cache size	: 15360 KB
physical id	: 0
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 4
initial apicid	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 20
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 pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 pti tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap intel_pt xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts vnmi
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs pml ept_violation_ve
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit mmio_stale_data
bogomips	: 6983.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:

processor	: 5
vendor_id	: GenuineIntel
cpu family	: 6
model		: 79
model name	: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
stepping	: 1
microcode	: 0xb00001f
cpu MHz		: 3662.476
cache size	: 15360 KB
physical id	: 1
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 20
initial apicid	: 20
fpu		: yes
fpu_exception	: yes
cpuid level	: 20
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 pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 pti tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap intel_pt xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts vnmi
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs pml ept_violation_ve
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit mmio_stale_data
bogomips	: 6983.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:

processor	: 6
vendor_id	: GenuineIntel
cpu family	: 6
model		: 79
model name	: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
stepping	: 1
microcode	: 0xb00001f
cpu MHz		: 3700.000
cache size	: 15360 KB
physical id	: 0
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 6
initial apicid	: 6
fpu		: yes
fpu_exception	: yes
cpuid level	: 20
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 pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 pti tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap intel_pt xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts vnmi
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs pml ept_violation_ve
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit mmio_stale_data
bogomips	: 6983.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:

processor	: 7
vendor_id	: GenuineIntel
cpu family	: 6
model		: 79
model name	: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
stepping	: 1
microcode	: 0xb00001f
cpu MHz		: 1197.569
cache size	: 15360 KB
physical id	: 1
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 22
initial apicid	: 22
fpu		: yes
fpu_exception	: yes
cpuid level	: 20
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 pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 pti tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap intel_pt xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts vnmi
vmx flags	: vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid ple shadow_vmcs pml ept_violation_ve
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit mmio_stale_data
bogomips	: 6983.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:       131382116 kB
MemFree:        123249824 kB
MemAvailable:   129019748 kB
Buffers:            2720 kB
Cached:          6519572 kB
SwapCached:           20 kB
Active:          1275308 kB
Inactive:        6182892 kB
Active(anon):     947676 kB
Inactive(anon):     6188 kB
Active(file):     327632 kB
Inactive(file):  6176704 kB
Unevictable:        3072 kB
Mlocked:               0 kB
SwapTotal:      33010684 kB
SwapFree:       33010160 kB
Zswap:                 0 kB
Zswapped:              0 kB
Dirty:             71808 kB
Writeback:             0 kB
AnonPages:        938996 kB
Mapped:           133108 kB
Shmem:             17956 kB
KReclaimable:     210432 kB
Slab:             296996 kB
SReclaimable:     210432 kB
SUnreclaim:        86564 kB
KernelStack:        4048 kB
PageTables:         4936 kB
SecPageTables:         0 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    98701740 kB
Committed_AS:    1321896 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      149368 kB
VmallocChunk:          0 kB
Percpu:             3680 kB
HardwareCorrupted:     0 kB
AnonHugePages:    737280 kB
ShmemHugePages:        0 kB
ShmemPmdMapped:        0 kB
FileHugePages:         0 kB
FilePmdMapped:         0 kB
CmaTotal:              0 kB
CmaFree:               0 kB
Unaccepted:            0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
Hugetlb:               0 kB
DirectMap4k:      197448 kB
DirectMap2M:    10190848 kB
DirectMap1G:    125829120 kB

Free space on /tmp at the end= 431448 MiB
End job on nodeC004 at 2025-07-02 20:20:20