Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:32:56 2012 Optimize a model with 56195 rows, 49952 columns and 217423 nonzeros Presolve removed 25 rows and 5131 columns Presolve time: 1.37s Presolved: 56170 rows, 44821 columns, 211790 nonzeros Variable types: 0 continuous, 44821 integer (44821 binary) Found heuristic solution: objective 223.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 470 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 384 3.00000 2.00000 33.3% - 1s 0 0 infeasible 0 3.00000 2.00000 33.3% - 1s Explored 0 nodes (895 simplex iterations) in 1.71 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%