Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:30:05 2012 Optimize a model with 10497 rows, 3422 columns and 34624 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.25s Presolved: 10553 rows, 3420 columns, 37626 nonzeros Variable types: 0 continuous, 3420 integer (3420 binary) Found heuristic solution: objective 58.0000000 Root relaxation: objective 2.000000e+00, 2531 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 116 58.00000 2.00000 96.6% - 0s H 0 0 52.0000000 2.00000 96.2% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 331 5.00000 2.66667 46.7% - 2s 0 0 2.68293 0 3092 5.00000 2.68293 46.3% - 2s 0 0 2.68293 0 3114 5.00000 2.68293 46.3% - 3s 0 0 2.68293 0 2977 5.00000 2.68293 46.3% - 5s 0 0 2.68293 0 2962 5.00000 2.68293 46.3% - 6s 0 0 2.68293 0 2954 5.00000 2.68293 46.3% - 7s 0 0 2.68293 0 2943 5.00000 2.68293 46.3% - 8s 0 0 2.68293 0 2936 5.00000 2.68293 46.3% - 10s 0 0 2.68293 0 2923 5.00000 2.68293 46.3% - 11s 0 0 2.68293 0 2945 5.00000 2.68293 46.3% - 12s 0 0 2.68293 0 2938 5.00000 2.68293 46.3% - 13s 0 0 2.68293 0 2952 5.00000 2.68293 46.3% - 15s 0 0 2.68293 0 2952 5.00000 2.68293 46.3% - 16s 0 2 3.00000 0 2952 5.00000 3.00000 40.0% - 24s 5 6 4.00000 5 159 5.00000 3.00000 40.0% 2206 26s * 18 5 15 4.0000000 3.00000 25.0% 869 27s Cutting planes: Clique: 185 Zero half: 4 Explored 24 nodes (51065 simplex iterations) in 27.69 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%