Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:43:36 2012 Optimize a model with 13055 rows, 18632 columns and 57118 nonzeros Presolve removed 576 rows and 4082 columns Presolve time: 0.25s Presolved: 12479 rows, 14550 columns, 51494 nonzeros Variable types: 0 continuous, 14550 integer (14550 binary) Found heuristic solution: objective 136.0000000 Root relaxation: objective 3.000000e+00, 8060 iterations, 0.43 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 24 136.00000 3.00000 97.8% - 4s H 0 0 3.0000000 3.00000 0.0% - 4s Explored 0 nodes (26151 simplex iterations) in 4.28 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%