Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:58:54 2012 Optimize a model with 6866 rows, 11990 columns and 32044 nonzeros Presolve removed 249 rows and 3163 columns Presolve time: 0.14s Presolved: 6617 rows, 8827 columns, 28216 nonzeros Variable types: 0 continuous, 8827 integer (8827 binary) Found heuristic solution: objective 109.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 127 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 (127 simplex iterations) in 0.16 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%