Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:24:11 2012 Optimize a model with 11739 rows, 16770 columns and 51471 nonzeros Presolve removed 35 rows and 4515 columns Presolve time: 0.21s Presolved: 11704 rows, 12255 columns, 46956 nonzeros Variable types: 0 continuous, 12255 integer (12255 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 2.000000e+00, 10863 iterations, 0.70 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 146 45.00000 2.00000 95.6% - 3s H 0 0 4.0000000 2.00000 50.0% - 3s H 0 0 3.0000000 2.00000 33.3% - 3s 0 0 2.00000 0 339 3.00000 2.00000 33.3% - 7s 0 0 2.00000 0 255 3.00000 2.00000 33.3% - 14s 0 0 2.00000 0 264 3.00000 2.00000 33.3% - 20s 0 0 2.00000 0 239 3.00000 2.00000 33.3% - 28s 0 0 2.00000 0 245 3.00000 2.00000 33.3% - 35s 0 0 2.00000 0 239 3.00000 2.00000 33.3% - 44s 0 0 2.00000 0 243 3.00000 2.00000 33.3% - 53s 0 0 2.00000 0 342 3.00000 2.00000 33.3% - 59s 0 0 2.00000 0 264 3.00000 2.00000 33.3% - 64s 0 2 2.00000 0 264 3.00000 2.00000 33.3% - 74s 2 3 2.00000 1 264 3.00000 2.00000 33.3% 10759 76s 5 5 2.00000 1 250 3.00000 2.00000 33.3% 4304 90s 6 6 2.00000 1 433 3.00000 2.00000 33.3% 3586 123s 7 6 2.00000 1 433 3.00000 2.00000 33.3% 3074 132s 9 7 infeasible 16 3.00000 3.00000 0.0% 16803 151s Cutting planes: Gomory: 7 Zero half: 1 Explored 10 nodes (382056 simplex iterations) in 151.28 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%