Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:11:18 2012 Optimize a model with 3750 rows, 650 columns and 11800 nonzeros Presolve time: 0.05s Presolved: 3750 rows, 650 columns, 20393 nonzeros Variable types: 0 continuous, 650 integer (650 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 3.500000e+00, 3374 iterations, 0.23 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.50000 0 53 17.00000 3.50000 79.4% - 0s H 0 0 8.0000000 3.50000 56.3% - 0s 0 0 5.33333 0 124 8.00000 5.33333 33.3% - 0s 0 0 6.00000 0 122 8.00000 6.00000 25.0% - 0s H 0 0 7.0000000 6.00000 14.3% - 0s 0 0 6.00000 0 152 7.00000 6.00000 14.3% - 0s 0 0 6.00000 0 46 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 23 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 36 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 54 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 29 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 28 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 30 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 12 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 22 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 22 7.00000 6.00000 14.3% - 2s 0 2 6.00000 0 22 7.00000 6.00000 14.3% - 3s 7 6 6.00000 1 25 7.00000 6.00000 14.3% 149 5s 187 11 infeasible 22 7.00000 6.00000 14.3% 272 10s Cutting planes: Gomory: 3 Clique: 32 Zero half: 8 Explored 324 nodes (95578 simplex iterations) in 11.64 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%