Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:14:52 2012 Optimize a model with 8801 rows, 2970 columns and 29104 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.18s Presolved: 8799 rows, 2968 columns, 28778 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 2.000000e+00, 2139 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 108 54.00000 2.00000 96.3% - 0s H 0 0 49.0000000 2.00000 95.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 1117 5.00000 2.66667 46.7% - 1s 0 0 3.00000 0 131 5.00000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 80 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 132 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 122 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 104 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 144 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 116 4.00000 3.00000 25.0% - 2s 0 2 3.00000 0 116 4.00000 3.00000 25.0% - 2s Cutting planes: Zero half: 8 Explored 3 nodes (16815 simplex iterations) in 2.41 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%