Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:36 2013 Optimize a model with 1140 rows, 2020 columns and 6010 nonzeros Presolve removed 30 rows and 20 columns Presolve time: 0.05s Presolved: 1110 rows, 2000 columns, 4980 nonzeros Variable types: 1510 continuous, 490 integer (490 binary) Root relaxation: objective 1.836170e+04, 402 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 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 18466.379364 18383.8229 0.45% - 0s 0 0 18383.8229 0 1 18466.3794 18383.8229 0.45% - 0s 0 0 18383.8229 0 1 18466.3794 18383.8229 0.45% - 0s 0 0 18383.8229 0 1 18466.3794 18383.8229 0.45% - 0s 0 0 18383.8229 0 1 18466.3794 18383.8229 0.45% - 0s 0 2 18385.3538 0 1 18466.3794 18385.3538 0.44% - 0s * 13 12 9 18419.731102 18391.8338 0.15% 7.2 0s * 40 8 7 18419.206591 18401.0261 0.10% 5.2 0s * 43 6 8 18419.171318 18403.1856 0.09% 5.3 0s * 52 4 7 18418.241613 18409.2450 0.05% 5.4 0s Cutting planes: Gomory: 1 Flow cover: 4 Explored 61 nodes (1025 simplex iterations) in 0.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.841824161337e+04, best bound 1.841824161337e+04, gap 0.0%