Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:05 2012 Optimize a model with 1794 rows, 84 columns and 3588 nonzeros Presolve removed 1261 rows and 0 columns Presolve time: 0.04s Presolved: 533 rows, 84 columns, 3619 nonzeros Variable types: 0 continuous, 84 integer (84 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.262581e+01, 304 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.62581 0 71 7.00000 12.62581 80.4% - 0s 0 0 12.05300 0 78 7.00000 12.05300 72.2% - 0s H 0 0 8.0000000 12.05300 50.7% - 0s 0 0 11.94144 0 80 8.00000 11.94144 49.3% - 0s 0 0 11.87313 0 81 8.00000 11.87313 48.4% - 0s 0 0 11.83758 0 81 8.00000 11.83758 48.0% - 0s 0 0 11.83578 0 81 8.00000 11.83578 47.9% - 0s 0 0 11.83508 0 81 8.00000 11.83508 47.9% - 0s 0 2 11.83355 0 81 8.00000 11.83355 47.9% - 0s * 42 14 6 9.0000000 11.55199 28.4% 51.0 0s Cutting planes: Clique: 54 Zero half: 1 Explored 57 nodes (3339 simplex iterations) in 0.51 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%