Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:01:39 2013 Optimize a model with 609 rows, 5092 columns and 273004 nonzeros Presolve removed 95 rows and 591 columns Presolve time: 0.59s Presolved: 514 rows, 4501 columns, 239133 nonzeros Variable types: 0 continuous, 4501 integer (4501 binary) Found heuristic solution: objective 3183.0000000 Root relaxation: objective 2.734000e+03, 780 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 2734.0000000 2734.00000 0.0% - 0s Explored 0 nodes (780 simplex iterations) in 0.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.734000000000e+03, best bound 2.734000000000e+03, gap 0.0%