Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:47:04 2012 Optimize a model with 2261 rows, 95 columns and 4522 nonzeros Presolve removed 1613 rows and 0 columns Presolve time: 0.06s Presolved: 648 rows, 95 columns, 4420 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.384579e+01, 366 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.84579 0 87 8.00000 13.84579 73.1% - 0s 0 0 13.44087 0 90 8.00000 13.44087 68.0% - 0s 0 0 13.35771 0 93 8.00000 13.35771 67.0% - 0s H 0 0 9.0000000 13.35771 48.4% - 0s 0 0 13.31221 0 94 9.00000 13.31221 47.9% - 0s 0 0 13.29582 0 93 9.00000 13.29582 47.7% - 0s 0 0 13.24444 0 94 9.00000 13.24444 47.2% - 0s 0 0 13.22871 0 94 9.00000 13.22871 47.0% - 0s 0 0 13.22377 0 94 9.00000 13.22377 46.9% - 0s 0 2 13.22306 0 94 9.00000 13.22306 46.9% - 0s Cutting planes: Clique: 60 Zero half: 1 Explored 98 nodes (7046 simplex iterations) in 1.07 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%