Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:00:17 2012 Optimize a model with 11639 rows, 3660 columns and 38278 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.30s Presolved: 11637 rows, 3658 columns, 37890 nonzeros Variable types: 0 continuous, 3658 integer (3658 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 2.000000e+00, 2715 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 0 120 60.00000 2.00000 96.7% - 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 0 329 5.00000 2.66667 46.7% - 1s 0 0 2.68235 0 3285 5.00000 2.68235 46.4% - 2s 0 0 2.68235 0 3238 5.00000 2.68235 46.4% - 3s 0 0 2.68235 0 3268 5.00000 2.68235 46.4% - 4s 0 0 2.68235 0 2923 5.00000 2.68235 46.4% - 6s 0 0 2.68235 0 2980 5.00000 2.68235 46.4% - 8s 0 0 2.68235 0 2907 5.00000 2.68235 46.4% - 9s 0 0 2.68235 0 2845 5.00000 2.68235 46.4% - 11s 0 0 2.68235 0 2932 5.00000 2.68235 46.4% - 13s 0 0 2.68235 0 2848 5.00000 2.68235 46.4% - 15s 0 0 2.68235 0 2890 5.00000 2.68235 46.4% - 17s 0 0 2.68235 0 2890 5.00000 2.68235 46.4% - 17s 0 2 3.00000 0 2890 5.00000 3.00000 40.0% - 23s * 21 5 19 4.0000000 3.00000 25.0% 367 24s Cutting planes: Clique: 185 Zero half: 18 Explored 31 nodes (54724 simplex iterations) in 24.27 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%