Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:10:28 2012 Optimize a model with 21163 rows, 5550 columns and 68670 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.73s Presolved: 21235 rows, 5548 columns, 73574 nonzeros Variable types: 0 continuous, 5548 integer (5548 binary) Found heuristic solution: objective 74.0000000 Root relaxation: objective 2.000000e+00, 3932 iterations, 0.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 148 74.00000 2.00000 97.3% - 1s H 0 0 68.0000000 2.00000 97.1% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 410 5.00000 2.66667 46.7% - 14s 0 0 2.67925 0 4942 5.00000 2.67925 46.4% - 16s 0 0 2.67925 0 4926 5.00000 2.67925 46.4% - 18s 0 0 2.67925 0 4895 5.00000 2.67925 46.4% - 19s 0 0 2.67925 0 4886 5.00000 2.67925 46.4% - 20s 0 0 2.67925 0 4891 5.00000 2.67925 46.4% - 21s 0 0 2.67925 0 4860 5.00000 2.67925 46.4% - 24s 0 0 2.67925 0 4859 5.00000 2.67925 46.4% - 26s 0 0 2.67925 0 4767 5.00000 2.67925 46.4% - 29s 0 0 2.67925 0 4788 5.00000 2.67925 46.4% - 31s 0 0 2.67925 0 4799 5.00000 2.67925 46.4% - 34s 0 0 2.67925 0 4862 5.00000 2.67925 46.4% - 37s 0 0 2.67925 0 4855 5.00000 2.67925 46.4% - 39s 0 2 3.00000 0 4855 5.00000 3.00000 40.0% - 69s 6 4 infeasible 5 5.00000 3.00000 40.0% 530 70s * 39 3 26 4.0000000 4.00000 0.0% 281 73s Cutting planes: Clique: 289 Zero half: 3 Explored 40 nodes (82086 simplex iterations) in 73.43 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%