Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:10:30 2012 Optimize a model with 2591 rows, 1332 columns and 8926 nonzeros Presolve removed 723 rows and 38 columns Presolve time: 0.10s Presolved: 1868 rows, 1294 columns, 7058 nonzeros Variable types: 0 continuous, 1294 integer (1294 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 3.000000e+00, 1768 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 60 36.00000 3.00000 91.7% - 0s H 0 0 5.0000000 3.00000 40.0% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 48 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 161 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 50 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 49 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 49 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 75 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 45 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 463 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 59 4.00000 3.00000 25.0% - 3s 0 2 3.00000 0 59 4.00000 3.00000 25.0% - 3s 6 6 3.00000 1 28 4.00000 3.00000 25.0% 119 5s Cutting planes: Gomory: 4 Clique: 1 Zero half: 7 Explored 25 nodes (62477 simplex iterations) in 8.42 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%