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<p>Hi SCIP Team.</p>
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<p>I am implementing a branch-and-price solver and for one of my benchmark instances solving is significantly slower than for other instances. In the statistics of SCIP is see the following output:</p>
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<div><span style="font-family: Consolas, Courier, monospace;">LP : Time Calls Iterations Iter/call Iter/sec Time-0-It Calls-0-It ItLimit</span><br>
<span style="font-family: Consolas, Courier, monospace;"> primal LP : 39822.63 1350 22117847 22431.89 555.41 80.20 364</span><br>
<span style="font-family: Consolas, Courier, monospace;"> dual LP : 903.64 9 622937 69215.22 689.36 0.00 0</span><br>
<span style="font-family: Consolas, Courier, monospace;"> lex dual LP : 0.00 0 0 0.00 -</span><br>
<span style="font-family: Consolas, Courier, monospace;"> barrier LP : 0.00 0 0 0.00 - 0.00 0</span><br>
<span style="font-family: Consolas, Courier, monospace;"> resolve instable : 32994.26 583 21004525 36028.34 636.61</span><br>
<span style="font-family: Consolas, Courier, monospace;"> diving/probing LP: 8.31 27 28543 1057.15 3436.36</span><br>
<span style="font-family: Consolas, Courier, monospace;"> strong branching : 0.00 0 0 0.00 - - - 0</span><br>
<span style="font-family: Consolas, Courier, monospace;"> (at root node) : - 0 0 0.00 -</span><br>
<span style="font-family: Consolas, Courier, monospace;"> conflict analysis: 0.00 0 0 0.00 -</span></div>
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<p>I am not sure what these statistics tell me. Most of the time the LP solver is struggeling with resolving any instability. What kind of instability is meant here? Is this something related to numerical issues? What can I do to solve that "issue"?</p>
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<p>Regards</p>
<p>Christian</p>
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