Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:39:38 2012 Optimize a model with 2807 rows, 6162 columns and 14194 nonzeros Presolve removed 192 rows and 2654 columns Presolve time: 0.11s Presolved: 2615 rows, 3508 columns, 11084 nonzeros Variable types: 0 continuous, 3508 integer (3508 binary) Found heuristic solution: objective 78.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 74 iterations, 0.00 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 (74 simplex iterations) in 0.12 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%