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: 63968 MiB (50002 MiB free)
  memory of node 1: 64473 MiB (49570 MiB free)
  node distances:
     10  21
     21  10

command line: BIN/runsolver --timestamp --file-size-limit 102400 -w /tmp/evaluation-result-4459525-1721885583/watcher-4459525-1721885583 -o /tmp/evaluation-result-4459525-1721885583/solver-4459525-1721885583 -C 3600 -W 3700 -M 31000 --bin-var /tmp/runsolver-exch-nodeC029-1721877863-276060 --watchdog 3760 CASHWMaxSAT-DisjCom-SP HOME/instance-4459525-1721885583.opb -total-t=3600 -no-par -v0 

running on 2 cores: 0,2

CPU governors:
  performance: 0 2

Enforcing FSIZE limit: 104857600 KiB
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 4.18.0-301.1.el8.x86_64
Linux 4.18.0-301.1.el8.x86_64
Starting watchdog thread
Current StackSize limit: 8192 KiB

solver pid=281033, runsolver pid=281030

[startup+0.100766 s]*
/proc/loadavg: 4.09 4.16 4.16 5/260 281034
/proc/meminfo: memFree=101948796/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=33916 memory=17464 CPUtime=0.09 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 3759 0 0 0 9 0 0 0 20 0 1 0 25087777 34729984 4366 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 8479 4366 970 2550 0 5434 0
Current children cumulated CPU time: 0.09 s
Current children cumulated vsize: 33916 KiB
Current children cumulated memory: 17464 KiB

[startup+0.205721 s]*
/proc/loadavg: 4.09 4.16 4.16 5/260 281034
/proc/meminfo: memFree=101926100/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=59272 memory=49340 CPUtime=0.2 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 11015 0 0 0 18 2 0 0 20 0 1 0 25087777 60694528 12335 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 14818 12335 2442 2550 0 11773 0
Current children cumulated CPU time: 0.2 s
Current children cumulated vsize: 59272 KiB
Current children cumulated memory: 49340 KiB

[startup+0.305656 s]*
/proc/loadavg: 4.09 4.16 4.16 5/260 281034
/proc/meminfo: memFree=101894596/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=86384 memory=75188 CPUtime=0.3 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 17402 0 0 0 28 2 0 0 20 0 1 0 25087777 88457216 18797 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 21596 18797 2506 2550 0 18551 0
Current children cumulated CPU time: 0.3 s
Current children cumulated vsize: 86384 KiB
Current children cumulated memory: 75188 KiB

[startup+0.700178 s]
/proc/loadavg: 4.09 4.16 4.16 6/260 281034
/proc/meminfo: memFree=101891088/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=88080 memory=77156 CPUtime=0.69 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 17828 0 0 0 67 2 0 0 20 0 1 0 25087777 90193920 19289 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 22020 19289 2538 2550 0 18975 0
Current children cumulated CPU time: 0.69 s
Current children cumulated vsize: 88080 KiB
Current children cumulated memory: 77156 KiB

[startup+1.50023 s]
/proc/loadavg: 4.09 4.16 4.16 5/260 281034
/proc/meminfo: memFree=101879412/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=91112 memory=80044 CPUtime=1.48 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 18591 0 0 0 146 2 0 0 20 0 1 0 25087777 93298688 20011 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 22778 20011 2538 2550 0 19733 0
Current children cumulated CPU time: 1.48 s
Current children cumulated vsize: 91112 KiB
Current children cumulated memory: 80044 KiB

[startup+3.10555 s]
/proc/loadavg: 4.16 4.17 4.17 5/260 281034
/proc/meminfo: memFree=101852024/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=96432 memory=85296 CPUtime=3.08 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 19904 0 0 0 306 2 0 0 20 0 1 0 25087777 98746368 21324 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 24108 21324 2538 2550 0 21063 0
Current children cumulated CPU time: 3.08 s
Current children cumulated vsize: 96432 KiB
Current children cumulated memory: 85296 KiB

[startup+6.30018 s]
/proc/loadavg: 4.16 4.17 4.17 5/260 281034
/proc/meminfo: memFree=101490340/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=104772 memory=92952 CPUtime=6.27 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 21834 0 0 0 624 3 0 0 20 0 1 0 25087777 107286528 23238 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 26193 23238 2554 2550 0 23148 0
Current children cumulated CPU time: 6.27 s
Current children cumulated vsize: 104772 KiB
Current children cumulated memory: 92952 KiB

[startup+12.7002 s]
/proc/loadavg: 4.15 4.17 4.17 5/260 281036
/proc/meminfo: memFree=101795588/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=155620 memory=140448 CPUtime=12.65 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 32845 0 0 0 1260 5 0 0 20 0 1 0 25087777 159354880 35112 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 38905 35112 2650 2550 0 35860 0
Current children cumulated CPU time: 12.65 s
Current children cumulated vsize: 155620 KiB
Current children cumulated memory: 140448 KiB

[startup+25.5002 s]
/proc/loadavg: 4.19 4.18 4.17 5/260 281038
/proc/meminfo: memFree=101697056/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=250880 memory=218652 CPUtime=25.4 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 52432 0 0 0 2531 9 0 0 20 0 1 0 25087777 256901120 54663 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 62720 54663 2666 2550 0 59675 0
Current children cumulated CPU time: 25.4 s
Current children cumulated vsize: 250880 KiB
Current children cumulated memory: 218652 KiB

[startup+51.1056 s]
/proc/loadavg: 4.12 4.16 4.17 5/259 281042
/proc/meminfo: memFree=101647256/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=292352 memory=254668 CPUtime=50.92 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 61611 0 0 0 5080 12 0 0 20 0 1 0 25087777 299368448 63667 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 73088 63667 2666 2550 0 70043 0
Current children cumulated CPU time: 50.92 s
Current children cumulated vsize: 292352 KiB
Current children cumulated memory: 254668 KiB

[startup+102.3 s]
/proc/loadavg: 4.10 4.15 4.16 5/259 281051
/proc/meminfo: memFree=101639748/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=292352 memory=254696 CPUtime=101.96 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 61689 0 0 0 10183 13 0 0 20 0 1 0 25087777 299368448 63674 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 73088 63674 2666 2550 0 70043 0
Current children cumulated CPU time: 101.96 s
Current children cumulated vsize: 292352 KiB
Current children cumulated memory: 254696 KiB

[startup+162.3 s]
/proc/loadavg: 4.13 4.15 4.16 5/259 281062
/proc/meminfo: memFree=101537480/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=305732 memory=269404 CPUtime=161.76 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 65495 0 0 0 16162 14 0 0 20 0 1 0 25087777 313069568 67351 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 76433 67351 2666 2550 0 73388 0
Current children cumulated CPU time: 161.76 s
Current children cumulated vsize: 305732 KiB
Current children cumulated memory: 269404 KiB

[startup+222.3 s]
/proc/loadavg: 4.18 4.17 4.17 5/256 281072
/proc/meminfo: memFree=101559588/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=325724 memory=289120 CPUtime=221.55 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 70432 0 0 0 22140 15 0 0 20 0 1 0 25087777 333541376 72280 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 81431 72280 2666 2550 0 78386 0
Current children cumulated CPU time: 221.55 s
Current children cumulated vsize: 325724 KiB
Current children cumulated memory: 289120 KiB

[startup+282.3 s]
/proc/loadavg: 4.18 4.17 4.17 5/257 281085
/proc/meminfo: memFree=101471924/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=325724 memory=289332 CPUtime=281.34 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 70541 0 0 0 28119 15 0 0 20 0 1 0 25087777 333541376 72333 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 81431 72333 2666 2550 0 78386 0
Current children cumulated CPU time: 281.34 s
Current children cumulated vsize: 325724 KiB
Current children cumulated memory: 289332 KiB

[startup+342.3 s]
/proc/loadavg: 4.20 4.17 4.17 5/255 281095
/proc/meminfo: memFree=101464688/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=329608 memory=289732 CPUtime=341.14 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 70716 0 0 0 34099 15 0 0 20 0 1 0 25087777 337518592 72433 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 82402 72433 2666 2550 0 79357 0
Current children cumulated CPU time: 341.14 s
Current children cumulated vsize: 329608 KiB
Current children cumulated memory: 289732 KiB

[startup+402.3 s]
/proc/loadavg: 4.38 4.23 4.19 5/255 281105
/proc/meminfo: memFree=101413236/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=357904 memory=299312 CPUtime=400.94 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 72081 0 0 0 40078 16 0 0 20 0 1 0 25087777 366493696 74828 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 89476 74828 2666 2550 0 86431 0
Current children cumulated CPU time: 400.94 s
Current children cumulated vsize: 357904 KiB
Current children cumulated memory: 299312 KiB

[startup+462.3 s]
/proc/loadavg: 4.28 4.23 4.19 5/257 281120
/proc/meminfo: memFree=101367848/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=362848 memory=303400 CPUtime=460.74 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 73095 0 0 0 46058 16 0 0 20 0 1 0 25087777 371556352 75850 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 90712 75850 2666 2550 0 87667 0
Current children cumulated CPU time: 460.74 s
Current children cumulated vsize: 362848 KiB
Current children cumulated memory: 303400 KiB

[startup+478.112 s]
# the end of solver process 281033 was just reported to runsolver
# Child status: 30

# cumulated CPU time of all completed processes:  user=476.317 s, system=0.184827 s

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

[startup+467.2 s]
/proc/loadavg: 4.26 4.22 4.19 5/257 281120
/proc/meminfo: memFree=101450888/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=362848 memory=303400 CPUtime=465.62 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 73095 0 0 0 46546 16 0 0 20 0 1 0 25087777 371556352 75850 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 90712 75850 2666 2550 0 87667 0
Current children cumulated CPU time: 465.62 s
Current children cumulated vsize: 362848 KiB
Current children cumulated memory: 303400 KiB

[startup+473.6 s]
/proc/loadavg: 4.22 4.22 4.18 5/257 281121
/proc/meminfo: memFree=101413024/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=362848 memory=303400 CPUtime=472 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 73113 0 0 0 47184 16 0 0 20 0 1 0 25087777 371556352 75850 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 90712 75850 2666 2550 0 87667 0
Current children cumulated CPU time: 472 s
Current children cumulated vsize: 362848 KiB
Current children cumulated memory: 303400 KiB

[startup+475.2 s]
/proc/loadavg: 4.22 4.22 4.18 5/257 281121
/proc/meminfo: memFree=101409920/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=364872 memory=304192 CPUtime=473.6 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 73353 0 0 0 47344 16 0 0 20 0 1 0 25087777 373628928 76048 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 91218 76048 2666 2550 0 88173 0
Current children cumulated CPU time: 473.6 s
Current children cumulated vsize: 364872 KiB
Current children cumulated memory: 304192 KiB

[startup+476.8 s]
/proc/loadavg: 4.22 4.22 4.18 5/257 281121
/proc/meminfo: memFree=101409808/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=365892 memory=305248 CPUtime=475.2 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 73569 0 0 0 47503 17 0 0 20 0 1 0 25087777 374673408 76312 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 91473 76312 2666 2550 0 88428 0
Current children cumulated CPU time: 475.2 s
Current children cumulated vsize: 365892 KiB
Current children cumulated memory: 305248 KiB

[startup+477.6 s]
/proc/loadavg: 4.22 4.22 4.18 5/257 281121
/proc/meminfo: memFree=101406900/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=365892 memory=305248 CPUtime=476 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 73570 0 0 0 47583 17 0 0 20 0 1 0 25087777 374673408 76312 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 91473 76312 2666 2550 0 88428 0
Current children cumulated CPU time: 476 s
Current children cumulated vsize: 365892 KiB
Current children cumulated memory: 305248 KiB

[startup+478 s]*
/proc/loadavg: 4.20 4.21 4.18 5/257 281123
/proc/meminfo: memFree=101406776/131524600 swapFree=131071728/131071996
[pid=281033] ppid=281030 vsize=365892 memory=305248 CPUtime=476.4 cores=0,2
/proc/281033/stat : 281033 (CASHWMaxSAT-Dis) R 281030 281033 276050 0 -1 4194304 73570 0 0 0 47623 17 0 0 20 0 1 0 25087777 374673408 76312 134679101440 4194304 14636349 140730875850368 0 0 0 0 0 8404994 0 0 0 17 0 0 0 0 0 0 16575728 16655184 53571584 140730875855843 140730875855959 140730875855959 140730875862974 0
/proc/281033/statm: 91473 76312 2666 2550 0 88428 0
Current children cumulated CPU time: 476.4 s
Current children cumulated vsize: 365892 KiB
Current children cumulated memory: 305248 KiB

[startup+478.105 s]*
/proc/loadavg: 4.20 4.21 4.18 5/257 281123
/proc/meminfo: memFree=101550956/131524600 swapFree=131071728/131071996
Current children cumulated CPU time: 0 s
Current children cumulated vsize: 0 KiB
Current children cumulated memory: 0 KiB

Child status: 30

Real time (s): 478.112
CPU time (s): 476.502
CPU user time (s): 476.317
CPU system time (s): 0.184827
CPU usage (%): 99.6632
Max. virtual memory (cumulated for all children) (KiB): 365892
Max. memory (cumulated for all children) (KiB): 305248

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 476.317
system time used= 0.184827
maximum resident set size= 305304
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 73570
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= 3
involuntary context switches= 3321


# summary of solver processes directly reported to runsolver:
#   pid: 281033
#   total CPU time (s): 476.502
#   total CPU user time (s): 476.317
#   total CPU system time (s): 0.184827

??? join timestamper begins
??? join timestamper ends
??? end of timestamper thread
runsolver used 0.879049 second user time and 2.21567 second system time

The end