Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:38:43 2012 Optimize a model with 7955 rows, 2756 columns and 26362 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.15s Presolved: 7953 rows, 2754 columns, 26056 nonzeros Variable types: 0 continuous, 2754 integer (2754 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 2.000000e+00, 2068 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 104 52.00000 2.00000 96.2% - 0s H 0 0 51.0000000 2.00000 96.1% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 151 5.00000 2.66667 46.7% - 1s 0 0 2.67114 0 2566 5.00000 2.67114 46.6% - 1s 0 0 2.67114 0 2556 5.00000 2.67114 46.6% - 1s 0 0 2.67114 0 2554 5.00000 2.67114 46.6% - 2s 0 0 2.67114 0 2566 5.00000 2.67114 46.6% - 2s 0 0 2.67114 0 2443 5.00000 2.67114 46.6% - 3s 0 0 2.67114 0 2402 5.00000 2.67114 46.6% - 4s 0 0 2.67114 0 2396 5.00000 2.67114 46.6% - 4s 0 0 2.67114 0 2417 5.00000 2.67114 46.6% - 5s 0 0 2.67114 0 2415 5.00000 2.67114 46.6% - 5s 0 0 2.67114 0 2395 5.00000 2.67114 46.6% - 5s 0 0 2.67114 0 2308 5.00000 2.67114 46.6% - 6s 0 0 2.67114 0 2359 5.00000 2.67114 46.6% - 7s 0 0 2.67114 0 2356 5.00000 2.67114 46.6% - 8s 0 0 2.67114 0 2385 5.00000 2.67114 46.6% - 8s 0 0 2.67114 0 2388 5.00000 2.67114 46.6% - 9s 0 0 2.67114 0 2287 5.00000 2.67114 46.6% - 9s 0 2 2.80000 0 2287 5.00000 2.80000 44.0% - 11s * 16 6 5 4.0000000 3.00000 25.0% 277 12s Cutting planes: Clique: 84 Explored 21 nodes (30167 simplex iterations) in 12.32 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%