<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Yves,<br>
<br>
My guess is that it is because there are places where CoinDrand48 is
used. <br>
<br>
Most likely is in ClpSimplex.cpp - try changing<br>
<br>
Coindrand48()<br>
<br>
to<br>
<br>
randomNumberGenerator_.randomDouble()</div><div><br></div><div>if that fixes I will check change in<br>
<br>
<br>
John<br><br></div>
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-------- Original Message --------<br>
Subject: [Cbc] Non Deterministic solution<br>
From: Yves Touchard <<a href="mailto:ytouchard@gopro.com">ytouchard@gopro.com</a>><br>
Date: Thu, February 04, 2016 11:31 am<br>
To: "<a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>" <<a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>><br>
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</style> <div class="WordSection1"> <div class="MsoNormal" style="font-size:12pt;"><span lang="FR">Hello,<o:p></o:p></span></div> <div class="MsoNormal" style="font-size:12pt;"><span lang="FR"><o:p> </o:p></span></div> <div class="MsoNormal" style="font-size:12pt;">I have just a got a determinism problem with a constraint file:<o:p></o:p></div> <div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div> <div class="MsoNormal" style="font-size:12pt;">You will find at <a href="https://www.dropbox.com/s/uzbmgj48kvtd5yj/pb.tar.gz?dl=0">https://www.dropbox.com/s/uzbmgj48kvtd5yj/pb.tar.gz?dl=0</a>, a tar file containing five files:<o:p></o:p></div> <div class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]-->pb.lp is the constraint file.<o:p></o:p></div> <div class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]-->pbTriv.sol is a solution file of the trivial problem (same problem with relaxed constraints) used for mipstart.<o:p></o:p></div> <div class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]-->pb.prio is the priority file.<o:p></o:p></div> <div class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]-->pbCmd1.sol is the most frequent solution provided by coin.<o:p></o:p></div> <div class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman""> </span></span></span><!--[endif]-->pbCmd1Alt.sol is the alternative solution (not easy to catch it…).<o:p></o:p></div> <div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div> <div class="MsoNormal" style="font-size:12pt;">Command line is:<o:p></o:p></div> <div class="MsoNormal" style="font-size:12pt;text-indent:.5in">bin/cbc pb.lp threads 104 ratio 0.05 mipstart pbTriv.sol priority pb.prio divingP on divingV on divesolves 301 multiple 4 branch printingOptions normal solution pb.sol<o:p></o:p></div> <div class="MsoNormal" style="font-size:12pt;">Cbc coin is 2.9.7 rev:2232 compiled with gcc 4.9.0<o:p></o:p></div> <div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div> <div class="MsoNormal" style="font-size:12pt;">Could you have a look on it, please?<o:p></o:p></div> <div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div> <div class="MsoNormal" style="font-size:12pt;">Thanks<o:p></o:p></div> <div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div> <div class="MsoNormal" style="font-size:12pt;">Yves<o:p></o:p></div> <div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div> </div> <hr>_______________________________________________<br>
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