Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:54:08 2013 Optimize a model with 341 rows, 9641 columns and 19251 nonzeros Presolve time: 0.01s Presolved: 341 rows, 9641 columns, 19251 nonzeros Variable types: 9610 continuous, 31 integer (31 binary) Root relaxation: objective 2.809540e+04, 368 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28095.3968 0 8 - 28095.3968 - - 0s H 0 0 29482.000000 28095.3968 4.70% - 0s H 0 0 28515.000000 28095.3968 1.47% - 0s 0 0 28379.9724 0 8 28515.0000 28379.9724 0.47% - 0s 0 0 28392.4523 0 6 28515.0000 28392.4523 0.43% - 0s 0 0 28401.4405 0 6 28515.0000 28401.4405 0.40% - 0s 0 0 28403.8518 0 6 28515.0000 28403.8518 0.39% - 0s 0 0 28403.8518 0 6 28515.0000 28403.8518 0.39% - 0s 0 0 28404.3561 0 5 28515.0000 28404.3561 0.39% - 0s 0 0 28404.4702 0 5 28515.0000 28404.4702 0.39% - 0s 0 0 28404.4702 0 8 28515.0000 28404.4702 0.39% - 0s 0 0 28404.4702 0 8 28515.0000 28404.4702 0.39% - 0s 0 0 28404.4702 0 6 28515.0000 28404.4702 0.39% - 0s 0 0 28404.4702 0 6 28515.0000 28404.4702 0.39% - 0s 0 0 28404.4702 0 6 28515.0000 28404.4702 0.39% - 0s 0 0 28404.4702 0 5 28515.0000 28404.4702 0.39% - 0s 0 0 28404.4702 0 5 28515.0000 28404.4702 0.39% - 0s 0 0 28404.4842 0 5 28515.0000 28404.4842 0.39% - 0s 0 0 28414.2458 0 6 28515.0000 28414.2458 0.35% - 0s 0 0 28419.3604 0 5 28515.0000 28419.3604 0.34% - 0s 0 0 28426.6812 0 4 28515.0000 28426.6812 0.31% - 0s 0 2 28432.0850 0 4 28515.0000 28432.0850 0.29% - 0s Cutting planes: Implied bound: 68 Flow cover: 6 Explored 12 nodes (1291 simplex iterations) in 0.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.851500000000e+04, best bound 2.851490000000e+04, gap 0.0004%