Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:40:58 2012 Optimize a model with 4127 rows, 7482 columns and 19434 nonzeros Presolve removed 174 rows and 2 columns Presolve time: 0.13s Presolved: 4039 rows, 7480 columns, 26308 nonzeros Variable types: 0 continuous, 7480 integer (7480 binary) Found heuristic solution: objective 86.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 124 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 (124 simplex iterations) in 0.14 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%