Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:31:54 2012 Optimize a model with 15377 rows, 4422 columns and 50224 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.47s Presolved: 15375 rows, 4420 columns, 49758 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3255 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 132 66.00000 2.00000 97.0% - 0s H 0 0 58.0000000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 1118 5.00000 2.66667 46.7% - 7s 0 0 2.66667 0 3257 5.00000 2.66667 46.7% - 7s 0 0 2.66667 0 431 5.00000 2.66667 46.7% - 10s 0 0 2.68449 0 3835 5.00000 2.68449 46.3% - 12s 0 0 2.68449 0 3843 5.00000 2.68449 46.3% - 14s 0 0 2.68449 0 3813 5.00000 2.68449 46.3% - 16s 0 0 2.68449 0 3857 5.00000 2.68449 46.3% - 18s 0 0 2.68449 0 3854 5.00000 2.68449 46.3% - 20s 0 0 2.68449 0 3843 5.00000 2.68449 46.3% - 21s 0 0 2.68449 0 3853 5.00000 2.68449 46.3% - 23s 0 0 2.68449 0 3907 5.00000 2.68449 46.3% - 25s 0 0 2.68449 0 3907 5.00000 2.68449 46.3% - 26s 0 1 3.00000 0 3907 5.00000 3.00000 40.0% - 48s 7 5 infeasible 6 5.00000 3.00000 40.0% 1404 50s * 25 4 17 4.0000000 3.00000 25.0% 729 51s Cutting planes: Clique: 318 Zero half: 28 Explored 30 nodes (81915 simplex iterations) in 51.25 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%