Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:21:52 2013 Optimize a model with 113652 rows, 7744 columns and 344608 nonzeros Presolve removed 11636 rows and 3982 columns Presolve time: 1.20s Presolved: 102016 rows, 3762 columns, 308427 nonzeros Variable types: 28 continuous, 3734 integer (3734 binary) Found heuristic solution: objective 195054.00000 Root relaxation: objective 1.622942e+05, 18037 iterations, 2.43 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 162294.158 0 8 195054.000 162294.158 16.8% - 4s H 0 0 162304.00000 162294.158 0.01% - 4s Explored 0 nodes (18117 simplex iterations) in 4.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.623040000000e+05, best bound 1.622950000000e+05, gap 0.0055%