Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:44:04 2012 Optimize a model with 11507 rows, 18906 columns and 52743 nonzeros Presolve removed 44 rows and 5756 columns Presolve time: 0.20s Presolved: 11463 rows, 13150 columns, 46821 nonzeros Variable types: 0 continuous, 13150 integer (13150 binary) Found heuristic solution: objective 137.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 167 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 54 3.00000 2.00000 33.3% - 0s 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (299 simplex iterations) in 0.26 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%