Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:45 2013 Optimize a model with 2140 rows, 3020 columns and 10010 nonzeros Presolve removed 30 rows and 20 columns Presolve time: 0.18s Presolved: 2110 rows, 3000 columns, 7980 nonzeros Variable types: 2010 continuous, 990 integer (990 binary) Root relaxation: objective 1.836170e+04, 723 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18361.7044 0 1 - 18361.7044 - - 0s 0 0 18381.2294 0 1 - 18381.2294 - - 0s 0 0 18381.2294 0 1 - 18381.2294 - - 0s 0 0 18383.0668 0 1 - 18383.0668 - - 0s 0 0 18383.8229 0 1 - 18383.8229 - - 0s H 0 0 18915.731529 18383.8229 2.81% - 0s 0 2 18385.7996 0 1 18915.7315 18385.7996 2.80% - 0s * 27 20 22 18420.099068 18392.0644 0.15% 12.2 0s * 61 24 11 18419.170656 18394.4701 0.13% 8.3 0s * 106 26 19 18418.270942 18397.5455 0.11% 7.3 0s * 110 24 20 18418.263500 18397.5455 0.11% 7.2 0s Cutting planes: Gomory: 1 Flow cover: 6 Explored 236 nodes (2061 simplex iterations) in 0.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.841826350024e+04, best bound 1.841670271060e+04, gap 0.0085%