Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:27:04 2012 Optimize a model with 3611 rows, 1892 columns and 12511 nonzeros Presolve removed 519 rows and 45 columns Presolve time: 0.10s Presolved: 3092 rows, 1847 columns, 11077 nonzeros Variable types: 0 continuous, 1847 integer (1847 binary) Found heuristic solution: objective 43.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 73 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 (73 simplex iterations) in 0.11 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%