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Hi James,<br>
<br>
sorry for the late reply. Your explanation with the cuts sounds
reasonable and could well cause this behavior, but is not the reason
here, since the cuts are only added a bit later.<br>
I also needed to have a look in the code to find the cause, but in
the end, it's quite simple: SCIP does not print a display line after
each pricing round, but only if nrounds % 100 == 1 (and after the
pricing round is finished, after cutting, etc.). So, the second line
you see is after a few more pricing rounds and you end up at 30.000
variables at that point even if only 2000 are added each round.<br>
<br>
Best,<br>
Gerald<br>
<br>
<div class="moz-cite-prefix">Am 15.05.2017 um 11:55 schrieb James
Cussens:<br>
</div>
<blockquote
cite="mid:CALQgqO04SCK4Y3c0UN2=v8TcHmSC1ZAABdrhcTLW6oGKyRMtkA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>Hi folks,</div>
<div><br>
</div>
<div>Regarding my question below. I suspect now that the reason
I end up with so many new columns is that the relevant
variables are in the cuts I am adding. Does that make sense?</div>
<div><br>
</div>
<div>James</div>
<div><br>
</div>
<br>
<div class="gmail_quote">---------- Forwarded message ----------<br>
From: <b class="gmail_sendername">James Cussens</b> <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:james.cussens@york.ac.uk">james.cussens@york.ac.uk</a>></span><br>
Date: 12 May 2017 at 15:13<br>
Subject: pricing in problem variables<br>
To: <a moz-do-not-send="true" href="mailto:scip@zib.de">scip@zib.de</a><br>
<br>
<br>
<div dir="ltr">
<div>I am experimenting with setting my problem variables to
be non-initial and having them 'priced-in'. See below for
an example of what is going on.</div>
<div><br>
</div>
<div>The line where we get 2000 cols makes sense, since this
is the (default) value of pricing/maxvarsroot = 2000.
However on the next iteration we end up with ~30k columns.</div>
<div>I don't see why we don't just end up with 4000. Can
anyone illuminate me?</div>
<div><br>
</div>
<div>Note that since I have also marked my variables as
'removable' most of them get (perhaps temporarily) removed
a little later on.</div>
<div><br>
</div>
<div>James</div>
<div> <font face="monospace, monospace"> </font></div>
<div><font face="monospace, monospace"><br>
</font></div>
<div><font face="monospace, monospace">.....</font></div>
<div><font face="monospace, monospace">1 constraints of type
<dagcluster></font></div>
<div><font face="monospace, monospace">Presolving Time:
14.87</font></div>
<div><font face="monospace, monospace"><br>
</font></div>
<div><font face="monospace, monospace"> time | node | left
|LP iter| mem |depth|mdpt |frac |cons |cols |rows |cuts
|pool |confs|strbr| dualbound | primalbound | gap
</font></div>
<div><font face="monospace, monospace"> 16.6s| 1 | 0
| 2 | 249M| 0 | 0 | - |1275 |2000 | 23 | 0
| 0 | 0 | 0 | 0.000000e+00 | -- |
Inf </font></div>
<div><font face="monospace, monospace"> 16.7s| 1 | 0
| 23 | 250M| 0 | 0 | 0 |1275 | 30k| 23 | 0
| 0 | 0 | 0 |-6.120109e+04 | -- |
Inf </font></div>
<div><font face="monospace, monospace">k16.8s| 1 | 0
| 23 | 250M| 0 | 0 | 0 |1275 | 30k| 23 | 0
| 0 | 0 | 0 |-6.120109e+04 |-8.017084e+04 |
31.00%</font></div>
<div><font face="monospace, monospace"> 17.1s| 1 | 0
| 210 | 261M| 0 | 0 | 0 |1275 | 30k| 149 | 126
| 8 | 0 | 0 |-6.120109e+04 |-8.017084e+04 |
31.00%</font></div>
<div><font face="monospace, monospace"> 17.2s| 1 | 0
| 210 | 261M| 0 | 0 | 0 |1275 | 30k| 149 | 126
| 8 | 0 | 0 |-6.396899e+04 |-8.017084e+04 |
25.33%</font></div>
<div><font face="monospace, monospace"> 18.1s| 1 | 0
| 444 | 288M| 0 | 0 | 58 |1275 | 30k| 288 | 265
| 9 | 0 | 0 |-6.396899e+04 |-8.017084e+04 |
25.33%</font></div>
<div><font face="monospace, monospace"> 18.3s| 1 | 0
| 463 | 288M| 0 | 0 | 55 |1275 | 30k| 288 | 265
| 9 | 0 | 0 |-6.566947e+04 |-8.017084e+04 |
22.08%</font></div>
<div><font face="monospace, monospace">k18.4s| 1 | 0
| 463 | 288M| 0 | 0 | 55 |1275 | 30k| 288 | 265
| 9 | 0 | 0 |-6.566947e+04 |-7.959231e+04 |
21.20%</font></div>
<div><font face="monospace, monospace"> 19.9s| 1 | 0
| 1144 | 299M| 0 | 0 | 136 |1275 | 30k| 366 | 343
| 10 | 0 | 0 |-6.566947e+04 |-7.959231e+04 |
21.20%</font></div>
<div><font face="monospace, monospace"> 20.4s| 1 | 0
| 1211 | 299M| 0 | 0 | 152 |1275 | 30k| 366 | 343
| 10 | 0 | 0 |-6.640382e+04 |-7.959231e+04 |
19.86%</font></div>
<div><font face="monospace, monospace"> 22.1s| 1 | 0
| 1782 | 301M| 0 | 0 | 207 |1275 | 30k| 442 | 419
| 11 | 0 | 0 |-6.640382e+04 |-7.959231e+04 |
19.86%</font></div>
<div><font face="monospace, monospace"> 22.7s| 1 | 0
| 1851 | 301M| 0 | 0 | 221 |1275 | 30k| 442 | 419
| 11 | 0 | 0 |-6.643694e+04 |-7.959231e+04 |
19.80%</font></div>
<div><font face="monospace, monospace">k22.8s| 1 | 0
| 1851 | 301M| 0 | 0 | 221 |1275 | 30k| 442 | 419
| 11 | 0 | 0 |-6.643694e+04 |-7.919237e+04 |
19.20%</font></div>
<div><font face="monospace, monospace"> 24.3s| 1 | 0
| 2116 | 416M| 0 | 0 | 197 |1275 | 525 | 416 | 469
| 38 | 0 | 0 |-6.643694e+04 |-7.919237e+04 |
19.20%</font></div>
<div><font face="monospace, monospace">....</font></div>
<span class="HOEnZb"><font color="#888888">
<div><br>
</div>
<div><br>
</div>
-- <br>
<div class="m_-5620744507916354856gmail_signature">James
Cussens<br>
Dept of Computer Science &<br>
York Centre for Complex Systems Analysis<br>
Room 326, The Hub, Deramore Lane Tel <a
moz-do-not-send="true"
href="tel:+44%201904%20325371" value="+441904325371"
target="_blank">+44 (0)1904 325371</a><br>
University of York
Fax <a moz-do-not-send="true"
href="tel:+44%201904%20500159" value="+441904500159"
target="_blank">+44 (0)1904 500159</a><br>
York YO10 5GE, UK <a
moz-do-not-send="true"
href="http://www.cs.york.ac.uk/%7Ejc"
target="_blank">http://www.cs.york.ac.uk/~jc</a><br>
<a moz-do-not-send="true"
href="http://www.york.ac.uk/docs/disclaimer/email.htm"
target="_blank">http://www.york.ac.uk/docs/<wbr>disclaimer/email.htm</a></div>
</font></span></div>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
<div class="gmail_signature" data-smartmail="gmail_signature">James
Cussens<br>
Dept of Computer Science &<br>
York Centre for Complex Systems Analysis<br>
Room 326, The Hub, Deramore Lane Tel +44 (0)1904
325371<br>
University of York Fax
+44 (0)1904 500159<br>
York YO10 5GE, UK <a
moz-do-not-send="true" href="http://www.cs.york.ac.uk/%7Ejc"
target="_blank">http://www.cs.york.ac.uk/~jc</a><br>
<a moz-do-not-send="true"
href="http://www.york.ac.uk/docs/disclaimer/email.htm"
target="_blank">http://www.york.ac.uk/docs/disclaimer/email.htm</a></div>
</div>
<br>
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