Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:40:03 2012 Optimize a model with 3159 rows, 6642 columns and 15795 nonzeros Presolve removed 31 rows and 2511 columns Presolve time: 0.09s Presolved: 3128 rows, 4131 columns, 13284 nonzeros Variable types: 0 continuous, 4131 integer (4131 binary) Found heuristic solution: objective 21.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 2602 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 (2602 simplex iterations) in 0.14 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%