Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:47:55 2012 Optimize a model with 5657 rows, 2162 columns and 18904 nonzeros Presolve removed 1750 rows and 2 columns Presolve time: 0.11s Presolved: 3907 rows, 2160 columns, 14824 nonzeros Variable types: 0 continuous, 2160 integer (2160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 4.000000e+00, 3219 iterations, 0.23 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 (8441 simplex iterations) in 0.68 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%