Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:49:48 2012 Optimize a model with 2730 rows, 104 columns and 5460 nonzeros Presolve removed 1963 rows and 0 columns Presolve time: 0.08s Presolved: 767 rows, 104 columns, 5273 nonzeros Variable types: 0 continuous, 104 integer (104 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.454145e+01, 408 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.54145 0 98 7.00000 14.54145 108% - 0s 0 0 14.00595 0 103 7.00000 14.00595 100% - 0s 0 0 13.94336 0 103 7.00000 13.94336 99.2% - 0s H 0 0 8.0000000 13.94336 74.3% - 0s 0 0 13.92111 0 104 8.00000 13.92111 74.0% - 0s 0 0 13.91517 0 104 8.00000 13.91517 73.9% - 0s 0 0 13.90600 0 103 8.00000 13.90600 73.8% - 0s 0 0 13.90210 0 104 8.00000 13.90210 73.8% - 0s H 0 0 9.0000000 13.90210 54.5% - 0s 0 0 13.89829 0 104 9.00000 13.89829 54.4% - 0s 0 0 13.89233 0 103 9.00000 13.89233 54.4% - 1s 0 0 13.88944 0 103 9.00000 13.88944 54.3% - 1s 0 0 13.88248 0 104 9.00000 13.88248 54.2% - 1s 0 0 13.87525 0 103 9.00000 13.87525 54.2% - 1s 0 0 13.87055 0 104 9.00000 13.87055 54.1% - 1s 0 0 13.86976 0 104 9.00000 13.86976 54.1% - 1s 0 0 13.86940 0 104 9.00000 13.86940 54.1% - 1s 0 2 13.86271 0 104 9.00000 13.86271 54.0% - 2s Cutting planes: Clique: 99 Zero half: 1 Explored 180 nodes (11868 simplex iterations) in 2.73 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%