Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:11:01 2012 Optimize a model with 2771 rows, 1332 columns and 9466 nonzeros Presolve removed 758 rows and 2 columns Presolve time: 0.11s Presolved: 2049 rows, 1330 columns, 8850 nonzeros Variable types: 0 continuous, 1330 integer (1330 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 3.000000e+00, 1785 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 252 36.00000 3.00000 91.7% - 0s H 0 0 17.0000000 3.00000 82.4% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 678 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 76 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 61 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 52 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 75 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 46 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 48 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 40 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 69 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 60 4.00000 3.00000 25.0% - 4s 0 2 3.00000 0 60 4.00000 3.00000 25.0% - 4s 4 4 3.00000 1 74 4.00000 3.00000 25.0% 532 5s Cutting planes: Gomory: 10 Clique: 6 Zero half: 65 Explored 7 nodes (65541 simplex iterations) in 8.03 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%