Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:36:08 2012 Optimize a model with 5085 rows, 2070 columns and 17145 nonzeros Presolve removed 1576 rows and 45 columns Presolve time: 0.11s Presolved: 3509 rows, 2025 columns, 13455 nonzeros Variable types: 0 continuous, 2025 integer (2025 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.000000e+00, 3417 iterations, 0.24 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 64 28.00000 3.00000 89.3% - 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 0 146 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 137 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 141 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 122 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 106 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 131 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 138 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 123 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 140 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 140 4.00000 3.00000 25.0% - 13s 0 2 3.00000 0 140 4.00000 3.00000 25.0% - 15s 7 6 3.00000 1 116 4.00000 3.00000 25.0% 420 21s 10 8 3.00000 1 52 4.00000 3.00000 25.0% 294 25s 12 10 3.00000 1 54 4.00000 3.00000 25.0% 245 30s Cutting planes: Gomory: 8 Clique: 1 Zero half: 1 Explored 17 nodes (188089 simplex iterations) in 32.62 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%