Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:10:55 2013 Optimize a model with 82239 rows, 6241 columns and 249640 nonzeros Presolve removed 8175 rows and 3199 columns Presolve time: 0.81s Presolved: 74064 rows, 3042 columns, 224391 nonzeros Variable types: 29 continuous, 3013 integer (3013 binary) Found heuristic solution: objective 127312.00000 Root relaxation: objective 9.822540e+04, 17751 iterations, 2.22 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 98225.3987 0 17 127312.000 98225.3987 22.8% - 3s H 0 0 98247.000000 98225.3987 0.02% - 3s H 0 0 98235.000000 98225.3987 0.01% - 3s Explored 0 nodes (17782 simplex iterations) in 3.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.823500000000e+04, best bound 9.822600000000e+04, gap 0.0092%