Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:00:49 2013 Optimize a model with 218 rows, 904 columns and 19638 nonzeros Presolve removed 76 rows and 218 columns Presolve time: 0.10s Presolved: 142 rows, 686 columns, 14798 nonzeros Variable types: 0 continuous, 686 integer (686 binary) Found heuristic solution: objective 726.0000000 Root relaxation: objective 5.650000e+02, 48 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 565.0000000 565.00000 0.0% - 0s Explored 0 nodes (48 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.650000000000e+02, best bound 5.650000000000e+02, gap 0.0%