Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:58:56 2012 Optimize a model with 21234 rows, 24180 columns and 87108 nonzeros Presolve removed 338 rows and 4032 columns Presolve time: 0.47s Presolved: 20896 rows, 20148 columns, 82033 nonzeros Variable types: 0 continuous, 20148 integer (20148 binary) Found heuristic solution: objective 155.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 217 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (217 simplex iterations) in 0.53 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%