Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:53 2012 Optimize a model with 1659 rows, 82 columns and 3318 nonzeros Presolve removed 1160 rows and 0 columns Presolve time: 0.04s Presolved: 499 rows, 82 columns, 3250 nonzeros Variable types: 0 continuous, 82 integer (82 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.233800e+01, 279 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.33800 0 79 6.00000 12.33800 106% - 0s H 0 0 7.0000000 12.33800 76.3% - 0s 0 0 12.10105 0 80 7.00000 12.10105 72.9% - 0s H 0 0 8.0000000 12.10105 51.3% - 0s 0 0 12.02087 0 80 8.00000 12.02087 50.3% - 0s 0 0 11.99756 0 82 8.00000 11.99756 50.0% - 0s 0 0 11.99234 0 81 8.00000 11.99234 49.9% - 0s 0 0 11.98363 0 81 8.00000 11.98363 49.8% - 0s 0 0 11.97890 0 81 8.00000 11.97890 49.7% - 0s 0 0 11.96775 0 81 8.00000 11.96775 49.6% - 0s 0 0 11.96754 0 81 8.00000 11.96754 49.6% - 0s 0 0 11.96402 0 81 8.00000 11.96402 49.6% - 0s 0 0 11.96373 0 81 8.00000 11.96373 49.5% - 0s 0 0 11.95980 0 81 8.00000 11.95980 49.5% - 0s 0 0 11.95918 0 81 8.00000 11.95918 49.5% - 0s 0 0 11.95883 0 81 8.00000 11.95883 49.5% - 0s 0 2 11.95869 0 81 8.00000 11.95869 49.5% - 0s Cutting planes: Gomory: 2 Clique: 43 Zero half: 4 Explored 108 nodes (5590 simplex iterations) in 0.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%