Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:56:52 2012 Optimize a model with 8686 rows, 5402 columns and 31096 nonzeros Presolve removed 1024 rows and 2 columns Presolve time: 0.34s Presolved: 7735 rows, 5400 columns, 33660 nonzeros Variable types: 0 continuous, 5400 integer (5400 binary) Found heuristic solution: objective 73.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 129 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 (129 simplex iterations) in 0.37 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%