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<div class="moz-cite-prefix">Yves,<br>
<br>
It is to be expected! When an heuristic is added it is given an
initial seed for use in generating pseudo random numbers. This
seed is changed depending on k for the k'th heuristic. So adding
divingVectorLength changes the seed for the RINS heusristic.<br>
<br>
If you don't like that, I can easily add an ifdef so
-DSAME_HEURISTIC_SEED will switch off - in CbcModel:addHeuristic.<br>
<br>
John<br>
<br>
<br>
<br>
On 06/02/15 14:03, Yves Touchard wrote:<br>
</div>
<blockquote cite="mid:54D4C9A2.7060106@dxo.com" type="cite">
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Hello,<br>
<br>
I got a determinism problem with the lp file (and maybe others)
located here:
<i><a moz-do-not-send="true" class="moz-txt-link-freetext"
href="https://www.dropbox.com/s/0i7c84lbm2pvyl3/t1.lp?dl=0">https://www.dropbox.com/s/0i7c84lbm2pvyl3/t1.lp?dl=0</a></i>.<br>
The solution file is different whether the divingV option is set
or not.<small><br>
Command-line is the following</small>:<br>
<p><small><small><i><big>b</big></i><i><big>in/cbc t1.lp threads
104 ratio 0.05 cutlength 30
<b>divingV</b> on divesolves 301 multiple 1 branch
printingOptions rows solution t1_0.sol</big></i></small></small><br>
</p>
Solution files are located here:<small><br>
</small>
<ul>
<li><small>Without -> <i><a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="https://www.dropbox.com/s/zcu8kwv9ukipaqe/t1_0.sol?dl=0">https://www.dropbox.com/s/zcu8kwv9ukipaqe/t1_0.sol?dl=0</a></i></small>
</li>
<li><small>With -> <i><a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="https://www.dropbox.com/s/jc1co4yeg9i13vw/t1_1.sol?dl=0">https://www.dropbox.com/s/jc1co4yeg9i13vw/t1_1.sol?dl=0</a></i></small>
</li>
</ul>
I tried with both trunk revision 2102 and 2128.<br>
Could you tell if it is an expected behaviour or not?<br>
<br>
Thanks & Regards<br>
<br>
Yves<br>
<br>
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