Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:02:54 2012 Optimize a model with 6239 rows, 2352 columns and 20830 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.11s Presolved: 6285 rows, 2350 columns, 22874 nonzeros Variable types: 0 continuous, 2350 integer (2350 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 2.000000e+00, 1847 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 96 48.00000 2.00000 95.8% - 0s H 0 0 44.0000000 2.00000 95.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 481 5.00000 2.66667 46.7% - 0s 0 0 2.66667 0 1890 5.00000 2.66667 46.7% - 0s 0 0 2.66667 0 320 5.00000 2.66667 46.7% - 2s 0 0 2.69697 0 1688 5.00000 2.69697 46.1% - 3s 0 0 2.69697 0 1779 5.00000 2.69697 46.1% - 4s 0 0 2.69697 0 1726 5.00000 2.69697 46.1% - 5s 0 0 2.69697 0 1741 5.00000 2.69697 46.1% - 6s 0 0 2.69697 0 1750 5.00000 2.69697 46.1% - 7s 0 0 2.69697 0 1754 5.00000 2.69697 46.1% - 7s 0 0 2.69697 0 1754 5.00000 2.69697 46.1% - 8s H 0 0 4.0000000 2.69697 32.6% - 10s 0 1 3.00000 0 1754 4.00000 3.00000 25.0% - 10s Cutting planes: Clique: 147 Zero half: 3 Explored 10 nodes (32631 simplex iterations) in 10.86 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%