Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:15:33 2012 Optimize a model with 6300 rows, 2550 columns and 21250 nonzeros Presolve removed 2102 rows and 100 columns Presolve time: 0.13s Presolved: 4198 rows, 2450 columns, 16300 nonzeros Variable types: 0 continuous, 2450 integer (2450 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.000000e+00, 5410 iterations, 0.56 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 (6778 simplex iterations) in 0.84 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%