Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:16:06 2012 Optimize a model with 4069 rows, 3080 columns and 15013 nonzeros Presolve removed 227 rows and 277 columns Presolve time: 0.08s Presolved: 3842 rows, 2803 columns, 14048 nonzeros Variable types: 0 continuous, 2803 integer (2803 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 3.000000e+00, 3229 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 16 55.00000 3.00000 94.5% - 0s H 0 0 3.0000000 3.00000 0.0% - 0s Explored 0 nodes (12090 simplex iterations) in 0.91 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%