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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>John,<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks for your reply.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>This works! zero iterations in resolve.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Just to be sure: you're saying &quot;not only get/set the WarmStart
object, but also get/set the col solution&quot; ?<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(and make sure to *copy* the getColSolution() array..)<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Now, is it safe to simply do this also in the<b> dual</b>
algorithm? <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If yes, then I'll simply always get/set both WarmStart and
ColSolution()..<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Again, thanks for you help.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Jan-Willem<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> osi-bounces@list.coin-or.org
[mailto:osi-bounces@list.coin-or.org] <b>On Behalf Of </b>John J Forrest<br>
<b>Sent:</b> 31 October 2008 16:33<br>
<b>Cc:</b> osi@list.coin-or.org<br>
<b>Subject:</b> Re: [Osi] OsiClp WarmStarts<o:p></o:p></span></p>

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<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal style='margin-bottom:12.0pt'><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Jan,</span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I think the
trouble is that OsiClp trusts the current solution as well as the basis.
&nbsp;In Primal it will use the current solution and basis, which will explain
the behavior in Primal. &nbsp;In Dual, &nbsp;I am not sure what the problem is.
&nbsp;Presolve may make a small difference, but should not make a major
difference. &nbsp;Clp itself has more flexibility.</span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Is it OK with
you to use getColSolution(0 and setColSolution()?</span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>John Forrest</span>
<br>
<br>
<o:p></o:p></p>

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    <p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>[Osi]
    OsiClp WarmStarts</span></b><o:p></o:p></p>
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  <p class=MsoNormal><o:p>&nbsp;</o:p></p>
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    <p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
    color:#E26200'>Goossens Jan-Willem </span></b><o:p></o:p></p>
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    <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
    color:#8F8F8F'>to:</span> <o:p></o:p></p>
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    <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>osi@list.coin-or.org</span>
    <o:p></o:p></p>
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    <p class=MsoNormal align=right style='text-align:right'><span
    style='font-size:7.5pt;font-family:"Arial","sans-serif"'>10/31/2008 06:48
    AM</span><o:p></o:p></p>
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      <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
      color:#8F8F8F'>Sent by:</span> <o:p></o:p></p>
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      <p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
      color:#E26200'>osi-bounces@list.coin-or.org</span></b><o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><br>
<br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Hi,</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>I
have some questions about WarmStarts using OsiClp. </span><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>I'm
solving pure LPs and I tried to recreate my real problem using miplib 3.0s
&quot;p0548&quot; (See </span><a
href="http://www.caam.rice.edu/~bixby/miplib/miplib3.html"><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>http://www.caam.rice.edu/~bixby/miplib/miplib3.html</span></a><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>)</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>See
below for code and output.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Basically,
I (1) solve the problem, store a warm start, (2) change the objective and
resolve, and (3) restore original objecte, load warmstart and resolve.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>I
was expecting the step (3) to take zero iterations. However, this is not
(always) the case: In this test problem, </span><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Test
run 1) if I do NOT set hints concerning DoDualIn*, then indeed (3) takes zero
iterations.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Test
run 2) but if I set HintTry for these to false (so use primal), then (3)
reoptimises (see end of email)</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>In
my real instances the (3) resolve takes a *lot* of iterations.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Note
that this test problem doesn&#8217;t completely represent my real problem: the real
instances show this behaviour even <i>without</i> the DoDual = false settings,
but the resulting iterations are the same.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>What
could be the cause for these reoptimizations?</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>A)
different algorithm after warmstart compared to solve warmstart was based on?</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>B)
presolve chooses to remove different rows/columns in resolve?</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>C)
something else?</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Or
is this simply not what the warmstarts are for?</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Any
help would be appreciated.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Regards,</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Jan-Wilem
Goossens</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;--</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Here
is the test problem</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
OsiClpSolverInterface model;</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; </span><br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.setHintParam(OsiHintParam::OsiDoDualInInitial, <span style='color:blue'>false</span>);
<span style='color:green'>// comment out</span></span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.setHintParam(OsiHintParam::OsiDoDualInResolve, <span style='color:blue'>false</span>);
<span style='color:green'>// comment out</span></span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.setHintParam(OsiHintParam::OsiDoPresolveInInitial);</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; model.setHintParam(OsiHintParam::OsiDoPresolveInResolve);</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:blue'>int</span> status = model.readMps(<span style='color:#A11F12'>&quot;p0548.mps&quot;</span>,
<span style='color:blue'>true</span>, <span style='color:blue'>false</span>);</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:blue'>int</span> n = model.getNumCols();</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:blue'>for</span> (<span style='color:blue'>int</span> i = 0; i
&lt; n; i++) model.setContinuous(i); <span style='color:green'>// change to LP</span></span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:green'>// (1) do initial solve of original problem, and store warm
start info</span></span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.initialSolve();</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
CoinWarmStart *warmStart = model.getWarmStart();</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:green'>// (2) change the objective function and resolve</span></span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:blue'>const</span> <span style='color:blue'>double</span> *
objCoefs = model.getObjCoefficients();</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:blue'>double</span> * oldCoefs = <span style='color:blue'>new</span>
<span style='color:blue'>double</span>[n];</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:blue'>for</span> (<span style='color:blue'>int</span> i = 0; i
&lt; n; i++) oldCoefs[i] = objCoefs[i];</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:blue'>for</span> (<span style='color:blue'>int</span> i = 0; i
&lt; n; i++) model.setObjCoeff(i,1.0);</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.resolve();</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:green'>// (3) restore the original problem, and load warm start</span></span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.setObjective(oldCoefs);</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.setWarmStart(warmStart);</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.resolve();</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>OUTPUT:</span>
<br>
<b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Test
run 1, with commented out:</span></b> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
// model.setHintParam(OsiHintParam::OsiDoDualInInitial, <span style='color:
blue'>false</span>); <span style='color:green'>// comment out</span></span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
// model.setHintParam(OsiHintParam::OsiDoDualInResolve, <span style='color:
blue'>false</span>); <span style='color:green'>// comment out</span></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:green'>// (1) do initial solve of original problem, and store warm
start info</span></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0506I
Presolve 163 (-13) rows, 543 (-5) columns and 1561 (-150) elements</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 0 Primal inf 38.8018 (12)</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
95 &nbsp;Obj 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0000I
Optimal - objective value 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0511I
After Postsolve, objective 315.255, infeasibilities - dual 0 (0), primal 0 (0)</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0000I
Optimal - objective value 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:green'>// (2) change the objective function and resolve</span></span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0506I
Presolve 165 (-11) rows, 543 (-5) columns and 1579 (-132) elements</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 59.3381 Primal inf 0.314674 (1) Dual inf 161381 (290)</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
103 &nbsp;Obj 16.571 Primal inf 8.57907 (29)</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
165 &nbsp;Obj 26.1669</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0000I
Optimal - objective value 26.1669</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0511I
After Postsolve, objective 26.1669, infeasibilities - dual 0 (0), primal 0 (0)</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:green'>// (3) restore the original problem, and load warm start</span></span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0506I
Presolve 163 (-13) rows, 543 (-5) columns and 1561 (-150) elements</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 366.255 Primal inf 30.9296 (2) Dual inf 304.123 (2)</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0000I
Optimal - objective value 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0511I
After Postsolve, objective 315.255, infeasibilities - dual 0 (0), primal 0 (0)</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Test
run 2, with:</span></b> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.setHintParam(OsiHintParam::OsiDoDualInInitial, <span style='color:blue'>false</span>);
</span><br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp;
model.setHintParam(OsiHintParam::OsiDoDualInResolve, <span style='color:blue'>false</span>);
</span><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:green'>// (1) do initial solve of original problem, and store warm
start info</span></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0506I
Presolve 163 (-13) rows, 543 (-5) columns and 1561 (-150) elements</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0028I
Crash put 44 variables in basis, 0 dual infeasibilities</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 0 Primal inf 38.8018 (12) Dual inf 5.62868e+012 (120)</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
132 &nbsp;Obj 20103.2 Primal inf 1.08159 (1) Dual inf 1.10445e+011 (193)</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
289 &nbsp;Obj 345.667 Dual inf 627.385 (26)</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
316 &nbsp;Obj 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0000I
Optimal - objective value 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0511I
After Postsolve, objective 315.255, infeasibilities - dual 0 (0), primal 0 (0)</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0000I
Optimal - objective value 315.255</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:green'>// (2) change the objective function and resolve</span></span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0506I
Presolve 165 (-11) rows, 543 (-5) columns and 1579 (-132) elements</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 69.5868 Dual inf 38838.5 (125)</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
94 &nbsp;Obj 26.1669</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0000I
Optimal - objective value 26.1669</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0511I
After Postsolve, objective 26.1669, infeasibilities - dual 0 (0), primal 0 (0)</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0506I
Presolve 163 (-13) rows, 543 (-5) columns and 1561 (-150) elements</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp; &nbsp; &nbsp; <span
style='color:green'>// (3) restore the original problem, and load warm start</span></span>
<br>
<b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
0 &nbsp;Obj 1817.67 Dual inf 3514.68 (6)</span></b> <br>
<b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0029I
End of values pass after 37 iterations</span></b> <br>
<b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
37 &nbsp;Obj 1817.67 Dual inf 3515.85 (5)</span></b> <br>
<b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
170 &nbsp;Obj 336.741 Dual inf 20.3286 (24)</span></b> <br>
<b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0006I
202 &nbsp;Obj 315.255</span></b> <br>
<b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Clp0000I
Optimal - objective value 315.255</span></b> <br>
<b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>Coin0511I
After Postsolve, objective 315.255, infeasibilities - dual 0 (0), primal 0 (0)</span></b>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#004080'>&nbsp;</span><tt><span
style='font-size:10.0pt'>_______________________________________________</span></tt><span
style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt>Osi mailing list</tt><br>
<tt>Osi@list.coin-or.org</tt><br>
<tt>http://list.coin-or.org/mailman/listinfo/osi</tt></span><o:p></o:p></p>

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