Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:50:09 2012 Optimize a model with 2788 rows, 105 columns and 5576 nonzeros Presolve removed 1957 rows and 0 columns Presolve time: 0.10s Presolved: 831 rows, 105 columns, 5844 nonzeros Variable types: 0 continuous, 105 integer (105 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.435806e+01, 387 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.35806 0 97 6.00000 14.35806 139% - 0s H 0 0 8.0000000 14.35806 79.5% - 0s 0 0 13.90132 0 102 8.00000 13.90132 73.8% - 0s 0 0 13.80620 0 104 8.00000 13.80620 72.6% - 0s 0 0 13.79844 0 104 8.00000 13.79844 72.5% - 0s 0 0 13.78388 0 103 8.00000 13.78388 72.3% - 0s 0 0 13.76815 0 104 8.00000 13.76815 72.1% - 0s 0 0 13.75472 0 105 8.00000 13.75472 71.9% - 0s 0 0 13.75343 0 105 8.00000 13.75343 71.9% - 1s 0 0 13.75071 0 104 8.00000 13.75071 71.9% - 1s 0 0 13.75004 0 104 8.00000 13.75004 71.9% - 1s 0 0 13.74976 0 104 8.00000 13.74976 71.9% - 1s 0 0 13.74973 0 104 8.00000 13.74973 71.9% - 1s 0 2 13.74497 0 104 8.00000 13.74497 71.8% - 1s H 252 59 9.0000000 11.57562 28.6% 52.4 2s Cutting planes: Clique: 85 Explored 314 nodes (15786 simplex iterations) in 2.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%