Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:53:20 2013 Optimize a model with 13287 rows, 1849 columns and 40678 nonzeros Presolve removed 2351 rows and 967 columns Presolve time: 0.09s Presolved: 10936 rows, 882 columns, 33447 nonzeros Variable types: 16 continuous, 866 integer (866 binary) Found heuristic solution: objective 36794.000000 Root relaxation: objective 2.781000e+04, 2831 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27810.0038 0 8 36794.0000 27810.0038 24.4% - 0s H 0 0 27828.000000 27810.0038 0.06% - 0s H 0 0 27824.000000 27810.0038 0.05% - 0s H 0 0 27822.000000 27810.0038 0.04% - 0s 0 0 27812.0763 0 23 27822.0000 27812.0763 0.04% - 0s 0 0 27812.0763 0 10 27822.0000 27812.0763 0.04% - 0s 0 0 27812.6606 0 22 27822.0000 27812.6606 0.03% - 0s H 0 0 27819.000000 27812.6606 0.02% - 0s 0 0 27813.7891 0 22 27819.0000 27813.7891 0.02% - 0s 0 1 27813.9118 0 22 27819.0000 27813.9118 0.02% - 0s Cutting planes: Gomory: 8 Cover: 2 Implied bound: 1 MIR: 10 Zero half: 2 Explored 12 nodes (3350 simplex iterations) in 0.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.781900000000e+04, best bound 2.781700000000e+04, gap 0.0072%