Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:41:42 2013 Optimize a model with 340 rows, 11130 columns and 122340 nonzeros Presolve removed 10 rows and 10 columns Presolve time: 0.22s Presolved: 330 rows, 11120 columns, 112330 nonzeros Variable types: 11020 continuous, 100 integer (100 binary) Root relaxation: objective 1.836170e+04, 115 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 3 - 18361.7044 - - 0s 0 0 18361.7577 0 3 - 18361.7577 - - 0s 0 0 18381.2294 0 3 - 18381.2294 - - 0s 0 0 18393.7318 0 12 - 18393.7318 - - 0s 0 0 18393.7318 0 12 - 18393.7318 - - 0s 0 2 18393.7641 0 12 - 18393.7641 - - 2s * 20 11 19 18419.101034 18393.7641 0.14% 5.3 2s * 45 22 21 18418.637207 18414.3847 0.02% 4.3 2s Cutting planes: Flow cover: 1 Explored 77 nodes (586 simplex iterations) in 2.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.841863720698e+04, best bound 1.841690590886e+04, gap 0.0094%