Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:45 2012 Optimize a model with 2684 rows, 506 columns and 8470 nonzeros Presolve removed 1608 rows and 0 columns Presolve time: 0.04s Presolved: 1076 rows, 506 columns, 6280 nonzeros Variable types: 0 continuous, 506 integer (506 binary) Found heuristic solution: objective 19.0000000 Root relaxation: objective 6.000000e+00, 1719 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 6.0000000 6.00000 0.0% - 0s Explored 0 nodes (2187 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%