Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:47:53 2012 Optimize a model with 54863 rows, 46872 columns and 210382 nonzeros Presolve removed 19 rows and 3674 columns Presolve time: 1.29s Presolved: 54844 rows, 43198 columns, 206202 nonzeros Variable types: 0 continuous, 43198 integer (43198 binary) Found heuristic solution: objective 216.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 470 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 0 378 3.00000 2.00000 33.3% - 1s Explored 0 nodes (887 simplex iterations) in 1.61 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%