Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:11 2012 Optimize a model with 2059 rows, 420 columns and 6498 nonzeros Presolve removed 1122 rows and 2 columns Presolve time: 0.06s Presolved: 957 rows, 418 columns, 5384 nonzeros Variable types: 0 continuous, 418 integer (418 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 5.000000e+00, 1324 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 34 20.00000 5.00000 75.0% - 0s H 0 0 11.0000000 5.00000 54.5% - 0s H 0 0 7.0000000 5.00000 28.6% - 0s 0 0 5.00000 0 72 7.00000 5.00000 28.6% - 0s 0 0 5.00000 0 78 7.00000 5.00000 28.6% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 51 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 70 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 36 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 54 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 183 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 56 6.00000 5.00000 16.7% - 0s 0 2 5.00000 0 56 6.00000 5.00000 16.7% - 0s Cutting planes: Zero half: 3 Explored 1 nodes (10412 simplex iterations) in 1.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%