Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:11:18 2012 Optimize a model with 27059 rows, 27060 columns and 107418 nonzeros Presolve removed 28 rows and 4266 columns Presolve time: 0.56s Presolved: 27031 rows, 22794 columns, 102824 nonzeros Variable types: 0 continuous, 22794 integer (22794 binary) Found heuristic solution: objective 164.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 328 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 0 264 3.00000 2.00000 33.3% - 0s 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (605 simplex iterations) in 0.71 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%