Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:53:43 2012 Optimize a model with 35459 rows, 32580 columns and 138058 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.81s Presolved: 35637 rows, 32578 columns, 170064 nonzeros Variable types: 0 continuous, 32578 integer (32578 binary) Found heuristic solution: objective 180.0000000 Root relaxation: objective 2.000000e+00, 20818 iterations, 1.55 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 298 180.00000 2.00000 98.9% - 4s H 0 0 108.0000000 2.00000 98.1% - 4s H 0 0 4.0000000 2.00000 50.0% - 4s H 0 0 3.0000000 2.00000 33.3% - 4s Cutting planes: Zero half: 2 Explored 0 nodes (67663 simplex iterations) in 5.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 2.000000000000e+00, gap 33.3333%