Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:05:07 2012 Optimize a model with 15404 rows, 4290 columns and 50178 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.46s Presolved: 15402 rows, 4288 columns, 49704 nonzeros Variable types: 0 continuous, 4288 integer (4288 binary) Found heuristic solution: objective 65.0000000 Root relaxation: objective 2.000000e+00, 3198 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 130 65.00000 2.00000 96.9% - 0s H 0 0 63.0000000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 3.00000 0 2099 5.00000 3.00000 40.0% - 4s 0 0 3.00000 0 2494 5.00000 3.00000 40.0% - 6s 0 0 3.00000 0 2529 5.00000 3.00000 40.0% - 12s 0 0 3.00000 0 2266 5.00000 3.00000 40.0% - 18s 0 0 3.00000 0 1287 5.00000 3.00000 40.0% - 25s 0 0 3.00000 0 2234 5.00000 3.00000 40.0% - 31s H 0 0 4.0000000 3.00000 25.0% - 31s 0 0 3.00000 0 2249 4.00000 3.00000 25.0% - 36s 0 0 3.00000 0 2246 4.00000 3.00000 25.0% - 42s 0 0 3.00000 0 2241 4.00000 3.00000 25.0% - 48s 0 0 3.00000 0 2247 4.00000 3.00000 25.0% - 54s 0 0 3.00000 0 2231 4.00000 3.00000 25.0% - 58s 0 2 3.00000 0 2231 4.00000 3.00000 25.0% - 70s Cutting planes: Clique: 30 Zero half: 5 Explored 1 nodes (213771 simplex iterations) in 72.76 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%