Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:33:40 2012 Optimize a model with 14959 rows, 4692 columns and 49230 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.49s Presolved: 14957 rows, 4690 columns, 48790 nonzeros Variable types: 0 continuous, 4690 integer (4690 binary) Found heuristic solution: objective 68.0000000 Root relaxation: objective 2.000000e+00, 3386 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 68.00000 2.00000 97.1% - 0s H 0 0 62.0000000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 241 5.00000 2.66667 46.7% - 4s 0 0 2.67347 0 3776 5.00000 2.67347 46.5% - 5s 0 0 2.67347 0 3753 5.00000 2.67347 46.5% - 7s 0 0 2.67347 0 3727 5.00000 2.67347 46.5% - 7s H 0 0 4.0000000 2.67347 33.2% - 8s 0 0 2.67347 0 3745 4.00000 2.67347 33.2% - 8s 0 0 2.67347 0 3266 4.00000 2.67347 33.2% - 11s 0 0 2.67347 0 3190 4.00000 2.67347 33.2% - 13s 0 0 2.67347 0 3197 4.00000 2.67347 33.2% - 14s 0 0 2.67347 0 3183 4.00000 2.67347 33.2% - 16s 0 0 2.67347 0 3016 4.00000 2.67347 33.2% - 18s 0 0 2.67347 0 3046 4.00000 2.67347 33.2% - 19s 0 0 2.67347 0 3151 4.00000 2.67347 33.2% - 21s 0 0 2.67347 0 3251 4.00000 2.67347 33.2% - 23s 0 0 2.67347 0 3058 4.00000 2.67347 33.2% - 25s 0 1 3.00000 0 3058 4.00000 3.00000 25.0% - 30s Cutting planes: Clique: 88 Zero half: 5 Explored 6 nodes (83539 simplex iterations) in 30.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%