Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:36:00 2012 Optimize a model with 16103 rows, 4422 columns and 52402 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.49s Presolved: 16101 rows, 4420 columns, 51914 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3041 iterations, 0.13 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 62.0000000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 186 5.00000 2.66667 46.7% - 8s 0 0 2.67016 0 4110 5.00000 2.67016 46.6% - 8s 0 0 2.67016 0 4104 5.00000 2.67016 46.6% - 10s 0 0 2.67016 0 4117 5.00000 2.67016 46.6% - 11s 0 0 2.67016 0 3708 5.00000 2.67016 46.6% - 12s 0 0 2.67016 0 3725 5.00000 2.67016 46.6% - 13s 0 0 2.67016 0 3734 5.00000 2.67016 46.6% - 14s 0 0 2.67016 0 3759 5.00000 2.67016 46.6% - 15s 0 0 2.67016 0 3763 5.00000 2.67016 46.6% - 16s 0 0 2.67016 0 3761 5.00000 2.67016 46.6% - 17s 0 2 2.80000 0 3761 5.00000 2.80000 44.0% - 28s 28 18 4.00000 19 87 5.00000 3.00000 40.0% 264 40s * 34 3 23 4.0000000 3.00000 25.0% 220 40s Cutting planes: Clique: 122 Zero half: 2 Explored 38 nodes (48115 simplex iterations) in 40.46 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%