Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:04 2012 Optimize a model with 1731 rows, 84 columns and 3462 nonzeros Presolve removed 1228 rows and 0 columns Presolve time: 0.04s Presolved: 503 rows, 84 columns, 3224 nonzeros Variable types: 0 continuous, 84 integer (84 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.248267e+01, 330 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.48267 0 78 6.00000 12.48267 108% - 0s H 0 0 7.0000000 12.48267 78.3% - 0s H 0 0 8.0000000 12.48267 56.0% - 0s 0 0 12.25506 0 78 8.00000 12.25506 53.2% - 0s 0 0 12.16006 0 81 8.00000 12.16006 52.0% - 0s H 0 0 9.0000000 12.16006 35.1% - 0s 0 0 12.14606 0 82 9.00000 12.14606 35.0% - 0s 0 0 12.13693 0 82 9.00000 12.13693 34.9% - 0s 0 0 12.12951 0 82 9.00000 12.12951 34.8% - 0s 0 0 12.12199 0 83 9.00000 12.12199 34.7% - 0s 0 0 12.11967 0 83 9.00000 12.11967 34.7% - 0s 0 0 12.11749 0 83 9.00000 12.11749 34.6% - 0s 0 0 12.07984 0 82 9.00000 12.07984 34.2% - 0s 0 0 12.07375 0 81 9.00000 12.07375 34.2% - 0s 0 0 12.06946 0 82 9.00000 12.06946 34.1% - 0s 0 0 12.06150 0 82 9.00000 12.06150 34.0% - 0s 0 0 12.05409 0 81 9.00000 12.05409 33.9% - 0s 0 0 12.05198 0 82 9.00000 12.05198 33.9% - 0s 0 0 12.04865 0 83 9.00000 12.04865 33.9% - 0s 0 0 12.04821 0 83 9.00000 12.04821 33.9% - 0s 0 0 12.04786 0 83 9.00000 12.04786 33.9% - 0s 0 2 12.04588 0 83 9.00000 12.04588 33.8% - 0s Cutting planes: Clique: 40 Zero half: 3 Explored 50 nodes (3492 simplex iterations) in 0.97 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%