Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:47:34 2012 Optimize a model with 6100 rows, 10100 columns and 28000 nonzeros Presolve removed 30 rows and 3000 columns Presolve time: 0.13s Presolved: 6070 rows, 7100 columns, 25000 nonzeros Variable types: 0 continuous, 7100 integer (7100 binary) Found heuristic solution: objective 30.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 6511 iterations, 0.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 78 3.00000 2.00000 33.3% - 1s 0 0 2.00000 0 78 3.00000 2.00000 33.3% - 2s 0 0 2.00000 0 147 3.00000 2.00000 33.3% - 3s 0 0 2.00000 0 153 3.00000 2.00000 33.3% - 5s 0 0 2.00000 0 182 3.00000 2.00000 33.3% - 8s 0 0 2.00000 0 151 3.00000 2.00000 33.3% - 9s 0 0 2.00000 0 182 3.00000 2.00000 33.3% - 11s 0 0 2.00000 0 182 3.00000 2.00000 33.3% - 12s 0 2 2.00000 0 182 3.00000 2.00000 33.3% - 14s 4 4 2.00000 1 78 3.00000 2.00000 33.3% 2548 15s 6 6 2.00000 1 78 3.00000 2.00000 33.3% 1699 20s 8 7 2.00000 1 82 3.00000 2.00000 33.3% 1274 26s Cutting planes: Gomory: 17 Explored 12 nodes (202344 simplex iterations) in 27.81 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%