Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:27:01 2012 Optimize a model with 16920 rows, 5256 columns and 55728 nonzeros Presolve time: 0.13s Presolved: 16920 rows, 5256 columns, 55815 nonzeros Variable types: 0 continuous, 5256 integer (5256 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 2.000000e+00, 4778 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 0 144 43.00000 2.00000 95.3% - 0s H 0 0 14.0000000 2.00000 85.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 14s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 22s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 39s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 50s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 58s H 0 0 4.0000000 2.00000 50.0% - 60s 0 2 2.00000 0 144 4.00000 2.00000 50.0% - 77s 1 3 2.50000 1 836 4.00000 2.00000 50.0% 51637 89s 2 4 3.00000 1 852 4.00000 2.50000 37.5% 40048 101s 6 6 3.00000 4 140 4.00000 3.00000 25.0% 14671 105s 18 6 3.00000 5 136 4.00000 3.00000 25.0% 5644 110s 20 4 cutoff 6 4.00000 3.00000 25.0% 6079 115s 24 4 cutoff 4 4.00000 3.00000 25.0% 6314 125s 25 3 cutoff 4 4.00000 3.00000 25.0% 7054 133s 26 4 3.00000 2 542 4.00000 3.00000 25.0% 7001 135s 32 2 cutoff 4 4.00000 3.00000 25.0% 6593 142s 34 4 3.00000 3 787 4.00000 3.00000 25.0% 6465 145s 47 1 cutoff 5 4.00000 3.00000 25.0% 5105 151s Cutting planes: Clique: 134 Explored 49 nodes (382037 simplex iterations) in 154.37 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%