Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:05:15 2013 Optimize a model with 662 rows, 6905 columns and 320760 nonzeros Presolve removed 19 rows and 21 columns Presolve time: 0.65s Presolved: 643 rows, 6884 columns, 319165 nonzeros Variable types: 0 continuous, 6884 integer (6884 binary) Found heuristic solution: objective 4296.0000000 Found heuristic solution: objective 3365.0000000 Root relaxation: objective 2.553000e+03, 1184 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 2553.0000000 2553.00000 0.0% - 0s Explored 0 nodes (1184 simplex iterations) in 0.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.553000000000e+03, best bound 2.553000000000e+03, gap 0.0%