<div dir="ltr">Hello Robert,<div><br></div><div>Thanks for answering.</div><div>Since I'm investigating the impact of using different clique cut separators (now I'm testing the ones provided by Gurobi, CPLEX, SCIP, and CBC) at the root node, I need to turn off the presolving.</div><div>The idea is to run only the cut separators at the original problem.</div><div>Is there any way to do this in SCIP?<br></div><div><br></div><div>Best regards,</div><div>Samuel</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Em sex, 12 de jul de 2019 às 04:47, Robert Lion Gottwald <<a href="mailto:robert.gottwald@zib.de">robert.gottwald@zib.de</a>> escreveu:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>Hello Samuel,</p>
<p>SCIP usually finds cliques during presolving, which you turned
off. Therefore the clique separator has no cliques to work with
and cannot find cuts.<br>
</p>
<p>Best,<br>
Robert</p>
<div class="gmail-m_-5443171786152886208moz-cite-prefix">On 7/11/19 8:46 PM, SAMUEL SOUZA BRITO
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<pre style="white-space:pre-wrap;color:rgb(0,0,0)">Hello SCIP team,</pre>
<pre style="white-space:pre-wrap;color:rgb(0,0,0)">I have developed a clique cut separation routine and I'm interested in comparing this approach with the one provided by SCIP.
For this, I'm trying to separate and insert clique cuts at the root node and investigate the improvement of the dual bound.
I have turned off the presolving, heuristics and all other types of cuts. Also, I have set the maximum number of nodes to 1.
However, the clique cut separator of SCIP is not generating any cut.
Is there another way to do this?</pre>
<pre style="white-space:pre-wrap;color:rgb(0,0,0)">I've attached the file with the parameters that I'm using and the output log.
Thanks in advance,
Samuel
</pre>
<div><br>
</div>
-- <br>
<div dir="ltr" class="gmail-m_-5443171786152886208gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div><span style="color:rgb(136,136,136)">==============================</span><span style="color:rgb(136,136,136)">==============================</span><span style="color:rgb(136,136,136)">=</span><br style="color:rgb(136,136,136)">
</div>
<div dir="ltr"><b>Prof. Samuel Souza Brito</b></div>
<div dir="ltr"><a href="mailto:samuelbrito@ufop.edu.br" style="color:rgb(17,85,204)" target="_blank">samuelbrito@ufop.edu.br</a><br>
<a href="mailto:samuel.ufop@gmail.com" style="color:rgb(17,85,204)" target="_blank">samuel.ufop@gmail.com</a><br>
<br>
Departamento de Computação e Sistemas - DECSI
<div>
<div>Instituto de Ciências Exatas e Aplicadas -
ICEA<br>
Universidade Federal de Ouro Preto - UFOP<br>
</div>
<br>
Rua 36, nº 115, sala G314, bairro Loanda</div>
<div>João Monlevade - MG<br>
CEP 35931-008<br>
Tel (31) 3852-8709 - Ramal 2061</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="gmail-m_-5443171786152886208mimeAttachmentHeader"></fieldset>
<pre class="gmail-m_-5443171786152886208moz-quote-pre">_______________________________________________
Scip mailing list
<a class="gmail-m_-5443171786152886208moz-txt-link-abbreviated" href="mailto:Scip@zib.de" target="_blank">Scip@zib.de</a>
<a class="gmail-m_-5443171786152886208moz-txt-link-freetext" href="https://listserv.zib.de/mailman/listinfo/scip" target="_blank">https://listserv.zib.de/mailman/listinfo/scip</a>
</pre>
</blockquote>
</div>
_______________________________________________<br>
Scip mailing list<br>
<a href="mailto:Scip@zib.de" target="_blank">Scip@zib.de</a><br>
<a href="https://listserv.zib.de/mailman/listinfo/scip" rel="noreferrer" target="_blank">https://listserv.zib.de/mailman/listinfo/scip</a><br>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span style="color:rgb(136,136,136)">==============================</span><span style="color:rgb(136,136,136)">==============================</span><span style="color:rgb(136,136,136)">=</span><br style="color:rgb(136,136,136)"></div><div dir="ltr"><b>Prof. Samuel Souza Brito</b></div><div dir="ltr"><a href="mailto:samuelbrito@ufop.edu.br" style="color:rgb(17,85,204)" target="_blank">samuelbrito@ufop.edu.br</a><br><a href="mailto:samuel.ufop@gmail.com" style="color:rgb(17,85,204)" target="_blank">samuel.ufop@gmail.com</a><br><br>Departamento de Computação e Sistemas - DECSI<div><div>Instituto de Ciências Exatas e Aplicadas - ICEA<br>Universidade Federal de Ouro Preto - UFOP<br></div><br>Rua 36, nº 115, sala G314, bairro Loanda</div><div>João Monlevade - MG<br>CEP 35931-008<br>Tel (31) 3852-8709 - Ramal 2061</div></div></div></div></div></div></div></div>