Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:39 2013 Optimize a model with 2140 rows, 3020 columns and 10010 nonzeros Presolve removed 30 rows and 20 columns Presolve time: 0.12s Presolved: 2110 rows, 3000 columns, 7980 nonzeros Variable types: 2010 continuous, 990 integer (990 binary) Root relaxation: objective 1.791602e+04, 847 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17916.0191 0 3 - 17916.0191 - - 0s 0 0 17963.4886 0 4 - 17963.4886 - - 0s 0 0 17979.1842 0 4 - 17979.1842 - - 0s H 0 0 17988.082339 17979.1842 0.05% - 0s 0 0 17979.4111 0 6 17988.0823 17979.4111 0.05% - 0s 0 0 17979.4111 0 3 17988.0823 17979.4111 0.05% - 0s 0 0 17979.4111 0 4 17988.0823 17979.4111 0.05% - 0s 0 0 17979.4111 0 4 17988.0823 17979.4111 0.05% - 0s 0 0 17979.4111 0 6 17988.0823 17979.4111 0.05% - 0s 0 0 17979.4845 0 5 17988.0823 17979.4845 0.05% - 0s 0 0 17979.5236 0 5 17988.0823 17979.5236 0.05% - 0s 0 0 17979.5631 0 5 17988.0823 17979.5631 0.05% - 0s 0 0 17979.6031 0 5 17988.0823 17979.6031 0.05% - 0s 0 0 17979.6434 0 5 17988.0823 17979.6434 0.05% - 0s 0 0 17979.6842 0 5 17988.0823 17979.6842 0.05% - 0s 0 0 17979.7255 0 5 17988.0823 17979.7255 0.05% - 0s 0 0 17979.7672 0 5 17988.0823 17979.7672 0.05% - 0s 0 0 17979.8094 0 5 17988.0823 17979.8094 0.05% - 0s 0 0 17979.8521 0 5 17988.0823 17979.8521 0.05% - 0s 0 0 17979.8953 0 5 17988.0823 17979.8953 0.05% - 0s H 0 0 17986.082339 17979.8953 0.03% - 0s 0 2 17979.9804 0 5 17986.0823 17979.9804 0.03% - 0s * 17 14 15 17984.233688 17980.3364 0.02% 4.4 0s * 18 10 15 17984.221875 17980.3364 0.02% 4.2 0s Cutting planes: Flow cover: 5 Explored 35 nodes (1289 simplex iterations) in 0.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.798422187500e+04, best bound 1.798272101228e+04, gap 0.0083%