Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:42:42 2012 Optimize a model with 4859 rows, 8190 columns and 22318 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.13s Presolved: 4947 rows, 8188 columns, 30310 nonzeros Variable types: 0 continuous, 8188 integer (8188 binary) Found heuristic solution: objective 90.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 150 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 54 3.00000 2.00000 33.3% - 0s 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (251 simplex iterations) in 0.17 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%