Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:47:04 2012 Optimize a model with 5105 rows, 2162 columns and 17248 nonzeros Presolve removed 1152 rows and 2 columns Presolve time: 0.10s Presolved: 3953 rows, 2160 columns, 14316 nonzeros Variable types: 0 continuous, 2160 integer (2160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 3.000000e+00, 3624 iterations, 0.35 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 48 46.00000 3.00000 93.5% - 1s H 0 0 29.0000000 3.00000 89.7% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 55 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 83 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 151 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 151 4.00000 3.00000 25.0% - 7s 0 2 3.00000 0 151 4.00000 3.00000 25.0% - 11s 5 5 3.00000 1 62 4.00000 3.00000 25.0% 1706 16s 7 6 3.00000 1 68 4.00000 3.00000 25.0% 1219 20s 9 8 3.00000 1 48 4.00000 3.00000 25.0% 948 25s 11 9 3.00000 1 73 4.00000 3.00000 25.0% 776 30s 16 14 3.00000 11 75 4.00000 3.00000 25.0% 6574 35s 18 16 3.00000 12 279 4.00000 3.00000 25.0% 5929 40s 39 8 3.00000 14 438 4.00000 3.00000 25.0% 3083 49s 49 2 3.00000 15 85 4.00000 3.00000 25.0% 2513 50s Cutting planes: Gomory: 2 Zero half: 9 Explored 52 nodes (174642 simplex iterations) in 50.15 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%