Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:38 2013 Optimize a model with 520 rows, 6720 columns and 26260 nonzeros Presolve removed 20 rows and 580 columns Presolve time: 0.03s Presolved: 500 rows, 6140 columns, 24260 nonzeros Variable types: 6020 continuous, 120 integer (120 binary) Root relaxation: objective 3.573401e+04, 481 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35734.0139 0 9 - 35734.0139 - - 0s 0 0 35739.4793 0 9 - 35739.4793 - - 0s 0 0 35740.7776 0 9 - 35740.7776 - - 0s 0 0 35741.3031 0 9 - 35741.3031 - - 0s 0 0 35741.7370 0 9 - 35741.7370 - - 0s 0 0 35742.0243 0 9 - 35742.0243 - - 0s 0 0 35742.1027 0 9 - 35742.1027 - - 0s 0 0 35742.3512 0 9 - 35742.3512 - - 0s 0 0 35743.8609 0 9 - 35743.8609 - - 0s 0 0 35743.8609 0 9 - 35743.8609 - - 0s 0 0 35743.8609 0 9 - 35743.8609 - - 0s 0 0 35743.8609 0 9 - 35743.8609 - - 0s 0 0 35743.8609 0 9 - 35743.8609 - - 0s H 0 0 36294.740271 35743.8609 1.52% - 0s 0 2 35810.9184 0 9 36294.7403 35810.9184 1.33% - 0s * 25 17 21 36239.622866 36010.0951 0.63% 16.6 0s * 52 13 15 36217.737157 36171.8246 0.13% 13.2 0s * 55 12 15 36216.374886 36171.8246 0.12% 12.5 0s H 57 8 36209.435357 36171.8246 0.10% 12.1 0s * 65 15 18 36199.580267 36173.4398 0.07% 11.0 0s * 73 12 19 36196.578146 36173.4398 0.06% 10.0 0s * 77 0 12 36173.439775 36173.4398 0.0% 9.6 0s Cutting planes: Flow cover: 11 Explored 78 nodes (1748 simplex iterations) in 0.49 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.617343977492e+04, best bound 3.617343977492e+04, gap 0.0%