Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:53:22 2013 Optimize a model with 14234 rows, 1936 columns and 43560 nonzeros Presolve removed 3426 rows and 1043 columns Presolve time: 0.10s Presolved: 10808 rows, 893 columns, 32916 nonzeros Variable types: 12 continuous, 881 integer (881 binary) Found heuristic solution: objective 46242.000000 Root relaxation: objective 4.067277e+04, 1622 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40672.7662 0 6 46242.0000 40672.7662 12.0% - 0s H 0 0 40688.000000 40672.7662 0.04% - 0s H 0 0 40679.000000 40672.7662 0.02% - 0s H 0 0 40674.000000 40672.7662 0.00% - 0s Explored 0 nodes (1626 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.067400000000e+04, best bound 4.067300000000e+04, gap 0.0025%