Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:40:30 2012 Optimize a model with 28863 rows, 31152 columns and 116862 nonzeros Presolve removed 23 rows and 3698 columns Presolve time: 0.64s Presolved: 28840 rows, 27454 columns, 112838 nonzeros Variable types: 0 continuous, 27454 integer (27454 binary) Found heuristic solution: objective 176.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 375 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 280 3.00000 2.00000 33.3% - 0s Explored 0 nodes (645 simplex iterations) in 0.80 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%