Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:43:13 2012 Optimize a model with 4230 rows, 8930 columns and 21244 nonzeros Presolve removed 32 rows and 3008 columns Presolve time: 0.14s Presolved: 4198 rows, 5922 columns, 18236 nonzeros Variable types: 0 continuous, 5922 integer (5922 binary) Found heuristic solution: objective 26.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 3576 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 cutoff 0 2.00000 1.00000 50.0% - 0s Explored 0 nodes (3576 simplex iterations) in 0.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%