Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:10:45 2013 Optimize a model with 79157 rows, 6084 columns and 240318 nonzeros Presolve removed 4386 rows and 3060 columns Presolve time: 0.76s Presolved: 74771 rows, 3024 columns, 227235 nonzeros Variable types: 39 continuous, 2985 integer (2985 binary) Found heuristic solution: objective 117279.00000 Root relaxation: objective 8.125037e+04, 19099 iterations, 2.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 81250.3712 0 14 117279.000 81250.3712 30.7% - 3s H 0 0 81264.000000 81250.3712 0.02% - 3s H 0 0 81256.000000 81250.3712 0.01% - 3s Explored 0 nodes (19172 simplex iterations) in 3.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.125600000000e+04, best bound 8.125100000000e+04, gap 0.0062%