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    <div class="moz-cite-prefix">Dear Kai Wei,<br>
      <br>
      in which methods did you try it and why didn't it work?<br>
      <br>
      It's a question of the stage SCIP is in, and if you do it in the
      wrong stage, you should get an error message which states quite
      clearly that the method cannot be called in this stage. In the
      documentation, you find the stages in which the method can be
      called, you can check the stage by SCIPgetStage().<br>
      <br>
      Normally, you should call the method right after you created your
      problem, e.g., in the READERREAD callback of your reader or in the
      problem data, if you have a method there which creates the
      problem.<br>
      <br>
      Best,<br>
      Gerald<br>
      <br>
      <br>
      <br>
      <br>
      Am 25.09.2014 um 08:47 schrieb <a class="moz-txt-link-abbreviated" href="mailto:weikaimas@163.com">weikaimas@163.com</a>:<br>
    </div>
    <blockquote cite="mid:201409251447213818715@163.com" type="cite">
      <meta http-equiv="content-type" content="text/html; charset=utf-8">
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      <div><span></span>Dear Gerald,</div>
      <div>   </div>
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      <p class="p0" style="margin: 0pt; text-align: justify; font-size:
        10.5pt; font-family: 'Times New Roman';"><span
          style="letter-spacing: 0pt; font-size: 10.5pt; font-family:
          'Microsoft YaHei UI'; background-position: initial initial;
          background-repeat: initial initial;">I have tried </span><span
          style="letter-spacing: 0pt; font-size: 10.5pt; font-family:
          'Microsoft YaHei UI'; background-position: initial initial;
          background-repeat: initial initial;">SCIPsetObjIntegral()</span><span
          style="letter-spacing: 0pt; font-size: 10.5pt; font-family:
          'Microsoft YaHei UI'; background-position: initial initial;
          background-repeat: initial initial;"> in several places ( main.c , read_col.c, pricer.c) but it could not work.</span></p>
      <p class="p0" style="margin: 0pt; text-align: justify; font-size:
        10.5pt; font-family: 'Times New Roman';"><span style="font-size:
          10.5pt; line-height: 1.5; background-color: window;
          letter-spacing: 0pt; font-family: 'Microsoft YaHei UI';"> Where should </span><span
          style="font-size: 10.5pt; line-height: 1.5; background-color:
          window; letter-spacing: 0pt; font-family: 'Microsoft YaHei
          UI';">SCIPsetObjIntegral()</span><span style="font-size:
          10.5pt; line-height: 1.5; background-color: window;
          letter-spacing: 0pt; font-family: 'Microsoft YaHei UI';"> be placed?</span></p>
      <!--EndFragment-->
      <div><br>
      </div>
      <div>Thanks,</div>
      <div><br>
      </div>
      <div>Kai Wei</div>
      <blockquote style="margin-top: 0px; margin-bottom: 0px;
        margin-left: 0.5em;">
        <div> </div>
        <div style="border:none;border-top:solid #B5C4DF
          1.0pt;padding:3.0pt 0cm 0cm 0cm">
          <div style="PADDING-RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE:
            12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefef;
            PADDING-BOTTOM: 8px; PADDING-TOP: 8px">
            <div><b>From:</b> <a moz-do-not-send="true"
                href="mailto:gamrath@zib.de">Gerald Gamrath</a></div>
            <div><b>Date:</b> 2014-09-24 17:15</div>
            <div><b>To:</b> <a moz-do-not-send="true"
                href="mailto:lixiangyong@163.com">lixiangyong@163.com</a>;
              <a moz-do-not-send="true" href="mailto:gleixner@zib.de">Ambros
                Gleixner</a></div>
            <div><b>CC:</b> <a moz-do-not-send="true"
                href="mailto:scip@zib.de">scip</a></div>
            <div><b>Subject:</b> Re: [Scip] How to terminate SCIP
              earlier?</div>
          </div>
        </div>
        <div>
          <div class="FoxDiv20140925142820370486">
            <div class="moz-cite-prefix">Dear Xiangyong,<br>
              <br>
              when using SCIPsetObjIntegral(), you do not need to call
              SCIPinterruptSolve() yourself, but SCIP will stop because
              it knows that optimality has been proven as soon as the
              primal bound is x and the lower bound is greater than  x -
              1.<br>
              Also the LP solving might be sped up, since a smaller
              cutoff bound can be set (which is irrelevant for
              branch-and-price, however).<br>
              Furthermore, also some plugins use this information to
              improve their algorithms.<br>
              <br>
              Summing up: If you know that every solution will have an
              integer value, you should tell SCIP about that. For
              branch-and-cut, SCIP will automatically detect this,
              however, for branch-and-price, not all variables are
              present, so it cannot be detected automatically.<br>
              <br>
              Best,<br>
              Gerald<br>
              <br>
              Am 24.09.2014 um 02:32 schrieb <a moz-do-not-send="true"
                class="moz-txt-link-abbreviated"
                href="mailto:lixiangyong@163.com">lixiangyong@163.com</a>:<br>
            </div>
            <blockquote cite="mid:2014092408320915414913@163.com"
              type="cite" style="margin-top: 0px; margin-bottom: 0px;
              margin-left: 0.5em;">
              <div><span></span>Dear Dr. <span style="font-size: 12pt;
                  line-height: 1.5; background-color: window;">Ambros,</span></div>
              <div><span style="font-size: 12pt; line-height: 1.5;
                  background-color: window;"><br>
                </span></div>
              <div><span style="font-size: 12pt; line-height: 1.5;
                  background-color: window;">I want to know the </span><span
                  style="font-size: 12pt; line-height: 1.5;
                  background-color: window;">advantage of  calling
                  SCIPsetObjIntegral() if at the beginning I </span><span
                  style="font-size: 12pt; line-height: 1.5;
                  background-color: window;">know any feasible solution
                  should have an integer objective value?  Can</span><span
                  style="font-size: 12pt; line-height: 1.5;
                  background-color: window;"> it speed up the solving
                  process?</span></div>
              <div><span style="font-size: 12pt; line-height: 1.5;
                  background-color: window;"><br>
                </span></div>
              <div><span style="font-size: 12pt; line-height: 1.5;
                  background-color: window;">Thanks,</span></div>
              <div><span style="font-size: 12pt; line-height: 1.5;
                  background-color: window;"><br>
                </span></div>
              <div><span style="font-size: 12pt; line-height: 1.5;
                  background-color: window;">Xiangyong Li</span></div>
              <div><span style="font-size: 12pt; line-height: 1.5;
                  background-color: window;"><br>
                </span></div>
              <blockquote style="margin-top: 0px; margin-bottom: 0px;
                margin-left: 0.5em;">
                <div> </div>
                <div style="border:none;border-top:solid #B5C4DF
                  1.0pt;padding:3.0pt 0cm 0cm 0cm">
                  <div style="PADDING-RIGHT: 8px; PADDING-LEFT: 8px;
                    FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000;
                    BACKGROUND: #efefef; PADDING-BOTTOM: 8px;
                    PADDING-TOP: 8px">
                    <div><b>From:</b> <a moz-do-not-send="true"
                        href="mailto:gleixner@zib.de">Ambros Gleixner</a></div>
                    <div><b>Date:</b> 2014-09-24 08:21</div>
                    <div><b>To:</b> <a moz-do-not-send="true"
                        href="mailto:scip@zib.de">scip</a>; <a
                        moz-do-not-send="true"
                        href="mailto:lixiangyong@163.com">lixiangyong@163.com</a></div>
                    <div><b>Subject:</b> Re: [Scip] How to terminate
                      SCIP earlier?</div>
                  </div>
                </div>
                <div>
                  <div>Dear Xiangyong,</div>
                  <div> </div>
                  <div> </div>
                  <div>Am 24.09.2014 02:08, schrieb <a
                      moz-do-not-send="true"
                      class="moz-txt-link-abbreviated"
                      href="mailto:lixiangyong@163.com">lixiangyong@163.com</a>:</div>
                  <div>> Dear Dr. Gerald,</div>
                  <div>></div>
                  <div>> Thanks,  I have used SCIPinterruptSolve() to
                    terminate my solving</div>
                  <div>> process since I know the current incumbent
                    is the optimal solution.</div>
                  <div>></div>
                  <div>> BTW, can you tell me the advantage of 
                    calling SCIPsetObjIntegral() if I</div>
                  <div>> know any feasible solution should have an
                    integer objective value?  Can</div>
                  <div>> it speed up the solving process?</div>
                  <div> </div>
                  <div>Yes.  If (in minimization) the primal bound is x
                    and the lower bound is </div>
                  <div>greater than  x - 1, the solution process can be
                    stopped already.</div>
                  <div> </div>
                  <div>Best regards,</div>
                  <div>Ambros</div>
                  <div> </div>
                  <div> </div>
                  <div>></div>
                  <div>></div>
                  <div>> Thanks,</div>
                  <div>></div>
                  <div>></div>
                  <div>> Xiangyong</div>
                  <div>></div>
                  <div>>     *From:* Gerald Gamrath <a
                      moz-do-not-send="true"
                      class="moz-txt-link-rfc2396E"
                      href="mailto:gamrath@zib.de"><mailto:gamrath@zib.de></a></div>
                  <div>>     *Date:* 2014-09-23 17:16</div>
                  <div>>     *To:* <a moz-do-not-send="true"
                      class="moz-txt-link-abbreviated"
                      href="mailto:lixiangyong@163.com">lixiangyong@163.com</a>
                    <a moz-do-not-send="true"
                      class="moz-txt-link-rfc2396E"
                      href="mailto:lixiangyong@163.com"><mailto:lixiangyong@163.com></a>;
                    scip</div>
                  <div>>     <a moz-do-not-send="true"
                      class="moz-txt-link-rfc2396E"
                      href="mailto:scip@zib.de"><mailto:scip@zib.de></a></div>
                  <div>>     *Subject:* Re: [Scip] How to terminate
                    SCIP earlier?</div>
                  <div>>     Dear Xiangyong Li,</div>
                  <div>></div>
                  <div>>     if you know that every feasible solution
                    will have an integer</div>
                  <div>>     objective value and therefore want to
                    stop the solving process when</div>
                  <div>>     the dualbound is larger than primalbound
                    - 1, you can just inform</div>
                  <div>>     SCIP that this is the case by calling
                    SCIPsetObjIntegral().</div>
                  <div>></div>
                  <div>>     Otherwise, you can call
                    SCIPinterruptSolve() to stop the solving</div>
                  <div>>     process, but SCIP will then print that
                    it was interrupted, not that</div>
                  <div>>     it was solved to optimality.</div>
                  <div>></div>
                  <div>>     Best,</div>
                  <div>>     Gerald</div>
                  <div>></div>
                  <div>>     Am 23.09.2014 um 10:02 schrieb <a
                      moz-do-not-send="true"
                      class="moz-txt-link-abbreviated"
                      href="mailto:lixiangyong@163.com">lixiangyong@163.com</a>:</div>
                  <div>>>     Dear all,</div>
                  <div>>></div>
                  <div>>>     I am using SCIP to implement my
                    branch and price algorithm.</div>
                  <div>>>     Now I want to terminate the SCIP
                    earlier since I can judge the</div>
                  <div>>>     problem has been optimally solved
                    when some condition is satisfied.</div>
                  <div>>>     Suppose UB and LB be the objective
                    value of best incumbent and the</div>
                  <div>>>     best remaining node in the branch
                    and bound tree.</div>
                  <div>>>     For my instances considered, SCIP
                    has optimally solved one</div>
                  <div>>>     instance if UB-LB < 1.</div>
                  <div>>></div>
                  <div>>>     Can you tell me how to set the
                    earlier termination condition in SCIP?</div>
                  <div>>></div>
                  <div>>>     Thanks,</div>
                  <div>>></div>
                  <div>>></div>
                  <div>>>     Xiangyong Li</div>
                  <div>>></div>
                  <div>>></div>
                  <div>>></div>
                  <div>>></div>
                  <div>>>    
                    _______________________________________________</div>
                  <div>>>     Scip mailing list</div>
                  <div>>>     <a moz-do-not-send="true"
                      class="moz-txt-link-abbreviated"
                      href="mailto:Scip@zib.de">Scip@zib.de</a></div>
                  <div>>>     <a moz-do-not-send="true"
                      class="moz-txt-link-freetext"
                      href="http://listserv.zib.de/mailman/listinfo/scip">http://listserv.zib.de/mailman/listinfo/scip</a></div>
                  <div>></div>
                  <div>></div>
                  <div>></div>
                  <div>>
                    _______________________________________________</div>
                  <div>> Scip mailing list</div>
                  <div>> <a moz-do-not-send="true"
                      class="moz-txt-link-abbreviated"
                      href="mailto:Scip@zib.de">Scip@zib.de</a></div>
                  <div>> <a moz-do-not-send="true"
                      class="moz-txt-link-freetext"
                      href="http://listserv.zib.de/mailman/listinfo/scip">http://listserv.zib.de/mailman/listinfo/scip</a></div>
                  <div>></div>
                  <div> </div>
                  <div>-- </div>
                  <div>____________________________________________________________</div>
                  <div>Ambros M. Gleixner</div>
                  <div>Zuse Institute Berlin - Matheon - Berlin
                    Mathematical School</div>
                  <div><a moz-do-not-send="true"
                      class="moz-txt-link-freetext"
                      href="http://www.zib.de/gleixner">http://www.zib.de/gleixner</a></div>
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Scip mailing list
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:Scip@zib.de">Scip@zib.de</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://listserv.zib.de/mailman/listinfo/scip">http://listserv.zib.de/mailman/listinfo/scip</a>
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