Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:45:51 2012 Optimize a model with 18071 rows, 5256 columns and 59110 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.64s Presolved: 18141 rows, 5254 columns, 63792 nonzeros Variable types: 0 continuous, 5254 integer (5254 binary) Found heuristic solution: objective 72.0000000 Root relaxation: objective 2.000000e+00, 3660 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 144 72.00000 2.00000 97.2% - 1s H 0 0 68.0000000 2.00000 97.1% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 2261 5.00000 3.00000 40.0% - 11s H 0 0 4.0000000 3.00000 25.0% - 12s 0 0 3.00000 0 2261 4.00000 3.00000 25.0% - 17s 0 2 3.00000 0 2261 4.00000 3.00000 25.0% - 29s Cutting planes: Clique: 41 Explored 1 nodes (84437 simplex iterations) in 32.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%