Gurobi 5.0.1 (linux64) logging started Fri Nov 16 18:31:44 2012 Optimize a model with 9272 rows, 15006 columns and 42334 nonzeros Presolve removed 38 rows and 4636 columns Presolve time: 0.15s Presolved: 9234 rows, 10370 columns, 37698 nonzeros Variable types: 0 continuous, 10370 integer (10370 binary) Found heuristic solution: objective 33.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 9281 iterations, 0.51 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 98 3.00000 2.00000 33.3% - 1s 0 0 2.00000 0 282 3.00000 2.00000 33.3% - 4s 0 0 2.00000 0 272 3.00000 2.00000 33.3% - 8s 0 0 2.00000 0 98 3.00000 2.00000 33.3% - 12s 0 0 2.00000 0 185 3.00000 2.00000 33.3% - 15s 0 0 2.00000 0 185 3.00000 2.00000 33.3% - 20s 0 0 2.00000 0 274 3.00000 2.00000 33.3% - 26s 0 0 2.00000 0 98 3.00000 2.00000 33.3% - 32s 0 0 2.00000 0 183 3.00000 2.00000 33.3% - 37s 0 0 2.00000 0 183 3.00000 2.00000 33.3% - 38s 0 2 2.00000 0 183 3.00000 2.00000 33.3% - 43s 4 4 2.00000 1 98 3.00000 2.00000 33.3% 3598 46s 5 5 2.00000 1 220 3.00000 2.00000 33.3% 2879 54s 6 6 2.00000 1 98 3.00000 2.00000 33.3% 2399 60s 7 6 2.00000 1 98 3.00000 2.00000 33.3% 2056 69s 8 7 2.00000 1 98 3.00000 2.00000 33.3% 1799 79s 9 8 2.00000 1 98 3.00000 2.00000 33.3% 1599 80s Cutting planes: Gomory: 4 Zero half: 5 Explored 13 nodes (361352 simplex iterations) in 84.47 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%