Gurobi 5.0.1 (linux64) logging started Wed Nov 28 03:51:17 2012 Optimize a model with 273 rows, 480 columns and 1395 nonzeros Presolve removed 15 rows and 15 columns Presolve time: 0.01s Presolved: 258 rows, 465 columns, 1365 nonzeros Variable types: 225 continuous, 240 integer (240 binary) Found heuristic solution: objective 10181.000000 Found heuristic solution: objective 3177.0000000 Root relaxation: objective 8.101333e+02, 354 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 810.13333 0 22 3177.00000 810.13333 74.5% - 0s 0 0 835.69963 0 29 3177.00000 835.69963 73.7% - 0s H 0 0 1820.0000000 835.69963 54.1% - 0s 0 0 1046.20928 0 38 1820.00000 1046.20928 42.5% - 0s 0 0 1347.38475 0 41 1820.00000 1347.38475 26.0% - 0s 0 0 1528.63043 0 37 1820.00000 1528.63043 16.0% - 0s 0 0 1556.17391 0 41 1820.00000 1556.17391 14.5% - 0s 0 0 1556.17391 0 43 1820.00000 1556.17391 14.5% - 0s 0 0 1556.17391 0 18 1820.00000 1556.17391 14.5% - 0s H 0 0 1816.0000000 1556.17391 14.3% - 0s 0 0 1556.17391 0 20 1816.00000 1556.17391 14.3% - 0s 0 0 1562.66667 0 20 1816.00000 1562.66667 14.0% - 0s 0 0 1562.66667 0 22 1816.00000 1562.66667 14.0% - 0s 0 0 1564.80000 0 22 1816.00000 1564.80000 13.8% - 0s 0 0 1581.06122 0 21 1816.00000 1581.06122 12.9% - 0s 0 0 1583.02041 0 21 1816.00000 1583.02041 12.8% - 0s 0 0 1628.08163 0 18 1816.00000 1628.08163 10.3% - 0s 0 0 1628.08163 0 17 1816.00000 1628.08163 10.3% - 0s 0 0 1628.08163 0 16 1816.00000 1628.08163 10.3% - 0s 0 0 1628.08163 0 18 1816.00000 1628.08163 10.3% - 0s 0 0 1628.08163 0 22 1816.00000 1628.08163 10.3% - 0s 0 0 1630.04082 0 16 1816.00000 1630.04082 10.2% - 0s 0 0 1632.53333 0 13 1816.00000 1632.53333 10.1% - 0s 0 0 1632.53333 0 15 1816.00000 1632.53333 10.1% - 0s 0 0 1634.66667 0 14 1816.00000 1634.66667 10.0% - 0s 0 0 1634.66667 0 14 1816.00000 1634.66667 10.0% - 0s 0 0 1634.66667 0 12 1816.00000 1634.66667 10.0% - 0s 0 0 1636.80000 0 19 1816.00000 1636.80000 9.87% - 0s 0 0 1647.03297 0 22 1816.00000 1647.03297 9.30% - 0s 0 0 1648.08791 0 23 1816.00000 1648.08791 9.25% - 0s 0 0 1649.14286 0 10 1816.00000 1649.14286 9.19% - 0s 0 0 1649.14286 0 20 1816.00000 1649.14286 9.19% - 0s 0 0 1649.14286 0 17 1816.00000 1649.14286 9.19% - 0s 0 0 1649.14286 0 17 1816.00000 1649.14286 9.19% - 0s 0 2 1649.14286 0 15 1816.00000 1649.14286 9.19% - 0s * 18 0 3 1812.0000000 1812.00000 0.0% 22.6 0s Cutting planes: Gomory: 8 Cover: 1 Implied bound: 10 Flow cover: 16 Flow path: 1 Explored 19 nodes (3227 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.812000000000e+03, best bound 1.812000000000e+03, gap 0.0%