Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:20:21 2012 Optimize a model with 6349 rows, 2550 columns and 21348 nonzeros Presolve removed 2104 rows and 102 columns Presolve time: 0.14s Presolved: 4245 rows, 2448 columns, 16228 nonzeros Variable types: 0 continuous, 2448 integer (2448 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 4.000000e+00, 4169 iterations, 0.37 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 (10143 simplex iterations) in 0.93 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%