Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:23:47 2012 Optimize a model with 8031 rows, 1056 columns and 24990 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8029 rows, 1054 columns, 27529 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.411765e+00, 8042 iterations, 0.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.41176 0 917 32.00000 3.41176 89.3% - 2s H 0 0 31.0000000 3.41176 89.0% - 2s 0 0 5.09673 0 798 31.00000 5.09673 83.6% - 2s H 0 0 29.0000000 5.09673 82.4% - 2s H 0 0 9.0000000 5.09673 43.4% - 3s 0 0 5.23881 0 256 9.00000 5.23881 41.8% - 4s H 0 0 8.0000000 5.23881 34.5% - 4s 0 0 5.35849 0 773 8.00000 5.35849 33.0% - 4s 0 0 5.35849 0 763 8.00000 5.35849 33.0% - 4s 0 0 5.35849 0 751 8.00000 5.35849 33.0% - 4s 0 0 5.35849 0 747 8.00000 5.35849 33.0% - 5s H 0 0 7.0000000 5.35849 23.5% - 5s 0 0 5.35849 0 738 7.00000 5.35849 23.5% - 5s 0 0 5.35849 0 709 7.00000 5.35849 23.5% - 5s 0 0 5.35849 0 730 7.00000 5.35849 23.5% - 5s 0 0 5.35849 0 666 7.00000 5.35849 23.5% - 7s 0 0 5.35849 0 688 7.00000 5.35849 23.5% - 8s 0 0 5.35849 0 688 7.00000 5.35849 23.5% - 8s 0 2 5.35880 0 688 7.00000 5.35880 23.4% - 11s 362 35 6.00000 18 48 7.00000 6.00000 14.3% 63.1 16s 803 34 6.00000 11 112 7.00000 6.00000 14.3% 48.0 22s 804 35 6.00000 3 131 7.00000 6.00000 14.3% 47.9 25s 806 36 6.00000 16 125 7.00000 6.00000 14.3% 47.8 31s 807 37 6.00000 8 130 7.00000 6.00000 14.3% 47.7 35s 809 38 6.00000 12 129 7.00000 6.00000 14.3% 47.6 40s Cutting planes: Gomory: 36 Clique: 62 Zero half: 167 Explored 817 nodes (116851 simplex iterations) in 43.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%