<br><font size=2 face="sans-serif">Ouch. Should be fixed now. I
noticed an error if preprocessed and fixed yesterday - but that breaks
if not preprocessed.</font>
<br>
<br><font size=2 face="sans-serif">By the way preprocessing is an Osi oriented
module so can be used by BCP or Symphony.</font>
<br>
<br><font size=2 face="sans-serif">John Forrest</font>
<br>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>Sven de Vries <devries@ma.tum.de></b>
</font>
<br><font size=1 face="sans-serif">Sent by: coin-discuss-bounces@list.coin-or.org</font>
<p><font size=1 face="sans-serif">03/29/2005 10:15 AM</font>
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<div align=center><font size=1 face="sans-serif">Please respond to<br>
Discussions about open source software for Operations Research
</font></div></table>
<br>
<td width=59%>
<table width=100%>
<tr>
<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td valign=top><font size=1 face="sans-serif">Discussions about open source
software for Operations Research <coin-discuss@list.coin-or.org></font>
<tr>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td valign=top>
<tr>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td valign=top><font size=1 face="sans-serif">[Coin-discuss] sample2 of
cbc returns wrong solution:</font></table>
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<br>
<br><font size=2><tt>Hi there,<br>
<br>
just ran CBC sample2 on 10teams. Strange enough it returns an fractional<br>
solution. 2 weeks ago it didn't. For the output see below....<br>
<br>
(The solution _value_ is ok, but not the solution itself...)<br>
<br>
sven<br>
<br>
<br>
Coin0001I At line 15 NAME 10TEAMS<br>
Coin0001I At line 16 ROWS<br>
Coin0001I At line 248 COLUMNS<br>
Coin0001I At line 8351 RHS<br>
Coin0001I At line 8467 BOUNDS<br>
Coin0001I At line 10493 ENDATA<br>
Coin0002I Problem 10TEAMS has 230 rows, 2025 columns and 12150 elements<br>
Coin0008I 10TEAMS read with 0 errors<br>
Clp0006I 0 Obj 20 Primal inf 120 (120)<br>
Clp0006I 200 Obj 507.5 Primal inf 388.455 (145)<br>
Clp0006I 400 Obj 645.5 Primal inf 1212.13 (149)<br>
Clp0006I 600 Obj 769.25 Primal inf 653 (161)<br>
Clp0006I 800 Obj 875 Primal inf 312.136 (151)<br>
Clp0006I 982 Obj 899 Primal inf 332.72 (148)<br>
Clp0006I 1165 Obj 917 Primal inf 6.4113 (36)<br>
Clp0006I 1268 Obj 917<br>
Clp0000I Optimal - objective value 917<br>
Stopping after 120 minutes<br>
Cbc0009I Objective coefficients multiple of 1<br>
Cbc0013I At root node, 39 cuts changed objective from 917 to 924 in 3<br>
passes<br>
Cbc0014I Cut generator 0 (Probing) - 0 row cuts (1 active), 1 column cuts<br>
in 0.14 seconds - new frequency is 1<br>
Cbc0014I Cut generator 1 (Gomory) - 3 row cuts (1 active), 0 column cuts<br>
in 0.14 seconds - new frequency is 1<br>
Cbc0014I Cut generator 2 (Knapsack) - 0 row cuts (0 active), 0 column cuts<br>
in 0.07 seconds - new frequency is 100<br>
Cbc0014I Cut generator 3 (OddHole) - 60 row cuts (37 active), 0 column<br>
cuts in 7.53 seconds - new frequency is 1<br>
Cbc0014I Cut generator 4 (Clique) - 0 row cuts (0 active), 0 column cuts<br>
in 0 seconds - new frequency is 100<br>
Cbc0014I Cut generator 5 (FlowCover) - 0 row cuts (0 active), 0 column<br>
cuts in 0.03 seconds - new frequency is 100<br>
Cbc0014I Cut generator 6 (MixedIntegerRounding) - 0 row cuts (0 active),
0<br>
column cuts in 0.13 seconds - new frequency is 100<br>
Cbc0010I After 0 nodes, 1 on tree, 1e+50 best solution, best possible 924<br>
Cbc0016I Integer solution of 956 found by strong branching after 6363<br>
iterations and 31 nodes<br>
Cbc0016I Integer solution of 924 found by strong branching after 20593<br>
iterations and 95 nodes<br>
Cbc0001I Search completed - best objective 924, took 20593 iterations and<br>
95 nodes<br>
Cbc0004I Integer solution of 924 found after 20593 iterations and 95 nodes<br>
./miplib3/10teams.gz took 266.98 seconds, 95 nodes with objective 924<br>
Finished<br>
Cuts at root node changed objective from 917 to 924<br>
Probing was tried 244 times and created 29 cuts of which 62 were active<br>
after adding rounds of cuts ( 4.68 seconds)<br>
Gomory was tried 244 times and created 7 cuts of which 4 were active after<br>
adding rounds of cuts ( 14.34 seconds)<br>
Knapsack was tried 3 times and created 0 cuts of which 0 were active after<br>
adding rounds of cuts ( 0.07 seconds)<br>
OddHole was tried 244 times and created 1066 cuts of which 478 were active<br>
after adding rounds of cuts ( 80.4 seconds)<br>
Clique was tried 3 times and created 0 cuts of which 0 were active after<br>
adding rounds of cuts ( 0 seconds)<br>
FlowCover was tried 3 times and created 0 cuts of which 0 were active<br>
after adding rounds of cuts ( 0.03 seconds)<br>
MixedIntegerRounding was tried 3 times and created 0 cuts of which 0 were<br>
active after adding rounds of cuts ( 0.13 seconds)<br>
--------------------------------------<br>
244 0.349873<br>
255 0.059486<br>
264 0.590640<br>
280 0.118268<br>
286 0.042605<br>
289 0.201797<br>
291 0.514446<br>
301 0.122884<br>
327 0.553416<br>
338 0.037224<br>
351 0.122884<br>
354 0.286476<br>
370 0.084564<br>
371 0.097807<br>
389 0.713643<br>
390 0.103987<br>
416 0.145945<br>
420 0.159838<br>
422 0.245887<br>
430 0.448330<br>
473 0.370421<br>
475 0.388715<br>
489 0.107979<br>
490 0.132885<br>
506 0.227959<br>
520 0.069003<br>
523 0.703038<br>
556 0.545179<br>
557 0.281848<br>
564 0.171861<br>
572 0.001112<br>
598 0.446018<br>
615 0.021708<br>
621 0.296962<br>
625 0.235312<br>
642 0.326023<br>
649 0.172973<br>
661 0.274142<br>
667 0.226862<br>
685 0.356120<br>
687 0.120561<br>
699 0.224312<br>
705 0.284101<br>
714 0.014905<br>
735 0.385598<br>
744 0.035278<br>
752 0.229596<br>
760 0.349528<br>
787 0.587784<br>
793 0.159379<br>
803 0.252838<br>
823 0.523318<br>
835 0.093952<br>
846 0.040229<br>
848 0.342500<br>
871 0.412216<br>
873 0.202186<br>
876 0.058674<br>
887 0.326924<br>
931 0.399051<br>
932 0.214302<br>
938 0.386647<br>
956 0.522753<br>
964 0.194971<br>
985 0.282276<br>
1000 0.441048<br>
1001 0.005536<br>
1005 0.303195<br>
1009 0.080385<br>
1014 0.148837<br>
1020 0.020998<br>
1053 0.421448<br>
1063 0.137583<br>
1067 0.228065<br>
1072 0.212903<br>
1093 0.030663<br>
1102 0.258808<br>
1103 0.592355<br>
1116 0.118174<br>
1143 0.376365<br>
1149 0.209792<br>
1158 0.413842<br>
1177 0.624048<br>
1201 0.146083<br>
1206 0.229869<br>
1221 0.145318<br>
1236 0.272145<br>
1239 0.200303<br>
1244 0.075715<br>
1245 0.306519<br>
1277 0.472265<br>
1291 0.057841<br>
1296 0.191881<br>
1301 0.278013<br>
1311 0.009418<br>
1313 0.221216<br>
1320 0.151369<br>
1329 0.009616<br>
1331 0.308144<br>
1342 0.300237<br>
1358 0.778784<br>
1384 0.221216<br>
1421 0.691856<br>
1429 0.048147<br>
1432 0.259998<br>
1444 0.157941<br>
1461 0.154736<br>
1478 0.018015<br>
1482 0.669308<br>
1488 0.209314<br>
1492 0.218011<br>
1515 0.203201<br>
1518 0.308144<br>
1519 0.008650<br>
1527 0.052679<br>
1533 0.632745<br>
1536 0.003205<br>
1552 0.153409<br>
1559 0.210642<br>
1595 0.455043<br>
1608 0.060835<br>
1618 0.484122<br>
1626 0.048781<br>
1654 0.500000<br>
1655 0.012055<br>
1661 0.439165<br>
1669 0.500000<br>
1674 0.072890<br>
1700 0.427110<br>
1711 0.598704<br>
1712 0.257636<br>
1717 0.098704<br>
1730 0.044957<br>
1757 0.143661<br>
1761 0.352516<br>
1764 0.427110<br>
1798 0.076714<br>
1807 0.059237<br>
1820 0.310776<br>
1834 0.024527<br>
1835 0.322638<br>
1841 0.282822<br>
1847 0.322638<br>
1880 0.238198<br>
1888 0.439165<br>
1891 0.401296<br>
1892 0.127845<br>
1899 0.461692<br>
1924 0.009167<br>
1939 0.342059<br>
1941 0.440763<br>
1968 0.217178<br>
1982 0.148221<br>
1983 0.157941<br>
1989 0.038308<br>
2000 0.189224<br>
2014 0.188293<br>
2022 0.278013<br>
--------------------------------------<br>
<br>
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