Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:44:09 2012 Optimize a model with 5060 rows, 2162 columns and 17158 nonzeros Presolve removed 1150 rows and 0 columns Presolve time: 0.12s Presolved: 3910 rows, 2162 columns, 14398 nonzeros Variable types: 0 continuous, 2162 integer (2162 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.000000e+00, 2993 iterations, 0.20 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 104 27.00000 3.00000 88.9% - 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 98 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 74 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 80 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 62 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 89 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 101 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 142 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 139 4.00000 3.00000 25.0% - 7s 0 2 3.00000 0 88 4.00000 3.00000 25.0% - 9s 4 4 3.00000 1 104 4.00000 3.00000 25.0% 358 10s 8 7 3.00000 1 101 4.00000 3.00000 25.0% 179 16s 13 10 3.00000 14 82 4.00000 3.00000 25.0% 4434 20s Cutting planes: Gomory: 2 Zero half: 10 Explored 19 nodes (119595 simplex iterations) in 21.30 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%