Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:55:39 2012 Optimize a model with 19277 rows, 23562 columns and 80629 nonzeros Presolve removed 952 rows and 4898 columns Presolve time: 0.43s Presolved: 18325 rows, 18664 columns, 73198 nonzeros Variable types: 0 continuous, 18664 integer (18664 binary) Found heuristic solution: objective 153.0000000 Root relaxation: objective 3.000000e+00, 12603 iterations, 1.24 seconds Total elapsed time = 8.47s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 36 153.00000 3.00000 98.0% - 8s H 0 0 3.0000000 3.00000 0.0% - 8s Explored 0 nodes (35585 simplex iterations) in 8.89 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%