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Dear Yu Chen,<br>
<br>
your model has some numerical issues. The matrix coefficients are in
the of 1e-05 to 1e+11. Such a large range can easily cause
difficulties and violations in the final result.<br>
To make matters worse, you are disabling presolving/simplification
(-s0) and enforce very small tolerances (1e-10).<br>
<br>
Testing other solvers on this instances also yielded warnings and
violations due to the bad numerics.<br>
<br>
My advice: Try to improve the model and verify that your result is
actually meaningful with regards to the problem. I don't think that
such a small tolerance is really required.<br>
<br>
Oh and by the way: On my machine the model was solved within a
second using the standard tolerances and default settings.<br>
<br>
Cheers<br>
Matthias<br>
<br>
<div class="moz-cite-prefix">On 17.08.2018 10:59, Yu Chen wrote:<br>
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<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US">Hi,
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US">I
am new to Soplex but I encountered a trouble when using it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US">I
made a LP file and used the code in terminal:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US"><o:p> </o:p></span></p>
<p class="p1"><span lang="EN-US">/build/bin/soplex -f1e-10
-o1e-10 -l1e-10 -s0 -x -q -c<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US">But
the Soplex took nearly one day to solve it. Do you know how
to decrease the solving time?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US">Best
regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt" lang="EN-US">Yu<o:p></o:p></span></p>
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<pre class="moz-signature" cols="72">--
\__________________
Matthias Miltenberger
Zuse Institute Berlin
Takustr. 7, 14195 Berlin
<a class="moz-txt-link-abbreviated" href="http://www.zib.de/miltenberger">www.zib.de/miltenberger</a>
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+49 (30) 841 85-245</pre>
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