Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:23:30 2012 Optimize a model with 8117 rows, 4422 columns and 28444 nonzeros Presolve removed 794 rows and 2 columns Presolve time: 0.27s Presolved: 7389 rows, 4420 columns, 30664 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 65.0000000 Root relaxation: objective 3.000000e+00, 5953 iterations, 0.72 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 32 65.00000 3.00000 95.4% - 2s H 0 0 3.0000000 3.00000 0.0% - 2s Explored 0 nodes (17848 simplex iterations) in 2.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%