Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:02:44 2012 Optimize a model with 6863 rows, 2352 columns and 22702 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.12s Presolved: 6861 rows, 2350 columns, 22416 nonzeros Variable types: 0 continuous, 2350 integer (2350 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 2.000000e+00, 1672 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 96 48.00000 2.00000 95.8% - 0s H 0 0 41.0000000 2.00000 95.1% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 137 5.00000 2.66667 46.7% - 0s 0 0 2.67153 0 2032 5.00000 2.67153 46.6% - 0s 0 0 2.67153 0 2039 5.00000 2.67153 46.6% - 1s 0 0 2.67153 0 1742 5.00000 2.67153 46.6% - 2s 0 0 2.67153 0 1729 5.00000 2.67153 46.6% - 3s 0 0 2.67153 0 1869 5.00000 2.67153 46.6% - 4s 0 0 2.67153 0 1795 5.00000 2.67153 46.6% - 5s 0 0 2.67153 0 1825 5.00000 2.67153 46.6% - 5s 0 0 2.67153 0 1872 5.00000 2.67153 46.6% - 6s 0 0 2.67153 0 1877 5.00000 2.67153 46.6% - 7s 0 0 2.67153 0 1872 5.00000 2.67153 46.6% - 8s 0 2 3.00000 0 1872 5.00000 3.00000 40.0% - 9s 18 2 4.00000 1 74 5.00000 4.00000 20.0% 315 10s H 27 4 4.0000000 4.00000 0.0% 244 10s Cutting planes: Clique: 59 Zero half: 4 Explored 27 nodes (39817 simplex iterations) in 10.35 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%