Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:16:06 2012 Optimize a model with 13635 rows, 18360 columns and 58725 nonzeros Presolve removed 23 rows and 3105 columns Presolve time: 0.26s Presolved: 13612 rows, 15255 columns, 55620 nonzeros Variable types: 0 continuous, 15255 integer (15255 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 2.000000e+00, 12525 iterations, 0.71 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 140 41.00000 2.00000 95.1% - 2s H 0 0 4.0000000 2.00000 50.0% - 2s H 0 0 3.0000000 2.00000 33.3% - 2s 0 0 2.00000 0 370 3.00000 2.00000 33.3% - 7s 0 0 2.00000 0 371 3.00000 2.00000 33.3% - 17s 0 0 2.00000 0 140 3.00000 2.00000 33.3% - 25s 0 0 2.00000 0 258 3.00000 2.00000 33.3% - 38s 0 0 2.00000 0 252 3.00000 2.00000 33.3% - 49s 0 0 2.00000 0 258 3.00000 2.00000 33.3% - 60s 0 0 2.00000 0 252 3.00000 2.00000 33.3% - 69s 0 0 2.00000 0 298 3.00000 2.00000 33.3% - 78s 0 0 2.00000 0 298 3.00000 2.00000 33.3% - 85s 0 2 2.00000 0 298 3.00000 2.00000 33.3% - 100s 5 5 2.00000 1 472 3.00000 2.00000 33.3% 5228 118s 6 6 2.00000 1 250 3.00000 2.00000 33.3% 4357 135s 7 6 2.00000 1 264 3.00000 2.00000 33.3% 3734 146s Cutting planes: Gomory: 2 Zero half: 47 Explored 8 nodes (420208 simplex iterations) in 146.94 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%