Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:01:16 2012 Optimize a model with 3851 rows, 124 columns and 7702 nonzeros Presolve removed 2684 rows and 0 columns Presolve time: 0.14s Presolved: 1167 rows, 124 columns, 8359 nonzeros Variable types: 0 continuous, 124 integer (124 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.648090e+01, 537 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.48090 0 119 8.00000 16.48090 106% - 0s 0 0 15.95505 0 122 8.00000 15.95505 99.4% - 0s H 0 0 9.0000000 15.95505 77.3% - 0s 0 0 15.90772 0 123 9.00000 15.90772 76.8% - 0s 0 0 15.87581 0 123 9.00000 15.87581 76.4% - 0s 0 0 15.85052 0 124 9.00000 15.85052 76.1% - 0s 0 0 15.81390 0 124 9.00000 15.81390 75.7% - 1s 0 0 15.81025 0 124 9.00000 15.81025 75.7% - 1s 0 0 15.80473 0 124 9.00000 15.80473 75.6% - 1s 0 0 15.80096 0 124 9.00000 15.80096 75.6% - 1s 0 2 15.79951 0 124 9.00000 15.79951 75.6% - 2s * 502 83 6 10.0000000 12.25306 22.5% 63.0 4s Cutting planes: Clique: 78 Explored 586 nodes (35208 simplex iterations) in 4.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%