Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:01:59 2012 Optimize a model with 20223 rows, 25122 columns and 85002 nonzeros Presolve removed 31 rows and 4584 columns Presolve time: 0.43s Presolved: 20192 rows, 20538 columns, 80164 nonzeros Variable types: 0 continuous, 20538 integer (20538 binary) Found heuristic solution: objective 158.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 256 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 174 3.00000 2.00000 33.3% - 0s 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (471 simplex iterations) in 0.54 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%