Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:01:00 2013 Optimize a model with 501 rows, 3227 columns and 173767 nonzeros Presolve removed 47 rows and 43 columns Presolve time: 0.32s Presolved: 454 rows, 3184 columns, 168612 nonzeros Variable types: 0 continuous, 3184 integer (3184 binary) Found heuristic solution: objective 2159.0000000 Root relaxation: objective 1.797000e+03, 499 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 1797.0000000 1797.00000 0.0% - 0s Explored 0 nodes (499 simplex iterations) in 0.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.797000000000e+03, best bound 1.797000000000e+03, gap 0.0%