Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:43:31 2012 Optimize a model with 26726 rows, 31506 columns and 110800 nonzeros Presolve removed 36 rows and 6020 columns Presolve time: 0.60s Presolved: 26690 rows, 25486 columns, 104480 nonzeros Variable types: 0 continuous, 25486 integer (25486 binary) Found heuristic solution: objective 177.0000000 Root relaxation: objective 2.000000e+00, 18781 iterations, 1.22 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 272 177.00000 2.00000 98.9% - 3s H 0 0 105.0000000 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 0 0 infeasible 0 3.00000 2.00000 33.3% - 4s Cutting planes: Gomory: 1 Zero half: 9 Explored 0 nodes (62488 simplex iterations) in 4.30 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%