Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:14:27 2012 Optimize a model with 3576 rows, 2450 columns and 12934 nonzeros Presolve removed 296 rows and 2 columns Presolve time: 0.10s Presolved: 3329 rows, 2448 columns, 14466 nonzeros Variable types: 0 continuous, 2448 integer (2448 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 3.000000e+00, 2017 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 16 49.00000 3.00000 93.9% - 0s H 0 0 3.0000000 3.00000 0.0% - 0s Explored 0 nodes (6432 simplex iterations) in 0.41 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%