Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:31:41 2012 Optimize a model with 12554 rows, 18360 columns and 55348 nonzeros Presolve removed 305 rows and 4457 columns Presolve time: 0.24s Presolved: 12249 rows, 13903 columns, 50036 nonzeros Variable types: 0 continuous, 13903 integer (13903 binary) Found heuristic solution: objective 135.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 168 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 (168 simplex iterations) in 0.27 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%