Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:15:09 2012 Optimize a model with 4181 rows, 2652 columns and 14941 nonzeros Presolve removed 359 rows and 2 columns Presolve time: 0.10s Presolved: 3822 rows, 2650 columns, 13924 nonzeros Variable types: 0 continuous, 2650 integer (2650 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 3.000000e+00, 3007 iterations, 0.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 36 51.00000 3.00000 94.1% - 0s H 0 0 3.0000000 3.00000 0.0% - 0s Explored 0 nodes (10071 simplex iterations) in 0.69 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%