Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:14:32 2012 Optimize a model with 7721 rows, 2970 columns and 25864 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.16s Presolved: 7719 rows, 2968 columns, 25578 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 2.000000e+00, 2385 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 47.0000000 2.00000 95.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 149 5.00000 2.66667 46.7% - 1s 0 0 2.67097 0 2367 5.00000 2.67097 46.6% - 1s 0 0 2.67097 0 2367 5.00000 2.67097 46.6% - 1s 0 0 2.67097 0 2265 5.00000 2.67097 46.6% - 3s 0 0 2.67097 0 2098 5.00000 2.67097 46.6% - 4s 0 0 2.67097 0 2090 5.00000 2.67097 46.6% - 5s 0 0 2.67097 0 2056 5.00000 2.67097 46.6% - 7s 0 0 2.67097 0 2076 5.00000 2.67097 46.6% - 8s 0 0 2.67097 0 2074 5.00000 2.67097 46.6% - 9s 0 0 2.67097 0 2071 5.00000 2.67097 46.6% - 11s 0 0 2.67097 0 2071 5.00000 2.67097 46.6% - 12s H 0 0 4.0000000 2.67097 33.2% - 14s 0 2 3.00000 0 2071 4.00000 3.00000 25.0% - 16s Cutting planes: Gomory: 1 Clique: 44 Zero half: 6 Explored 19 nodes (54707 simplex iterations) in 16.94 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%