Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:02:35 2012 Optimize a model with 12119 rows, 3660 columns and 39718 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.32s Presolved: 12117 rows, 3658 columns, 39314 nonzeros Variable types: 0 continuous, 3658 integer (3658 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 2.000000e+00, 2631 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 120 60.00000 2.00000 96.7% - 0s H 0 0 50.0000000 2.00000 96.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 280 5.00000 2.66667 46.7% - 1s 0 0 2.67836 0 3236 5.00000 2.67836 46.4% - 2s 0 0 2.67836 0 3274 5.00000 2.67836 46.4% - 3s 0 0 2.67836 0 2935 5.00000 2.67836 46.4% - 8s 0 0 2.67836 0 2955 5.00000 2.67836 46.4% - 12s 0 0 2.67836 0 2980 5.00000 2.67836 46.4% - 16s 0 0 2.67836 0 2877 5.00000 2.67836 46.4% - 21s 0 0 2.67836 0 2940 5.00000 2.67836 46.4% - 26s 0 0 2.67836 0 2940 5.00000 2.67836 46.4% - 28s 0 2 3.00000 0 2940 5.00000 3.00000 40.0% - 38s 5 7 4.00000 4 107 5.00000 3.00000 40.0% 2304 40s * 25 5 20 4.0000000 3.00000 25.0% 502 40s Cutting planes: Clique: 186 Zero half: 15 Explored 33 nodes (89094 simplex iterations) in 40.57 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%