Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:47:55 2012 Optimize a model with 5473 rows, 2162 columns and 18352 nonzeros Presolve removed 1152 rows and 2 columns Presolve time: 0.12s Presolved: 4321 rows, 2160 columns, 15496 nonzeros Variable types: 0 continuous, 2160 integer (2160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 4.000000e+00, 3192 iterations, 0.28 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 4.0000000 4.00000 0.0% - 0s Explored 0 nodes (10192 simplex iterations) in 0.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%