Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:21 2012 Optimize a model with 1814 rows, 86 columns and 3628 nonzeros Presolve removed 1262 rows and 0 columns Presolve time: 0.05s Presolved: 552 rows, 86 columns, 3550 nonzeros Variable types: 0 continuous, 86 integer (86 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.280261e+01, 323 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.80261 0 80 7.00000 12.80261 82.9% - 0s H 0 0 8.0000000 12.80261 60.0% - 0s 0 0 12.46935 0 84 8.00000 12.46935 55.9% - 0s 0 0 12.38432 0 85 8.00000 12.38432 54.8% - 0s 0 0 12.36983 0 85 8.00000 12.36983 54.6% - 0s 0 0 12.34562 0 84 8.00000 12.34562 54.3% - 0s 0 0 12.31884 0 83 8.00000 12.31884 54.0% - 0s 0 0 12.31182 0 84 8.00000 12.31182 53.9% - 0s 0 0 12.30159 0 85 8.00000 12.30159 53.8% - 0s 0 0 12.29985 0 85 8.00000 12.29985 53.7% - 0s 0 0 12.28950 0 85 8.00000 12.28950 53.6% - 0s 0 0 12.28651 0 84 8.00000 12.28651 53.6% - 0s 0 0 12.28527 0 84 8.00000 12.28527 53.6% - 0s 0 0 12.28411 0 85 8.00000 12.28411 53.6% - 0s 0 2 12.28388 0 85 8.00000 12.28388 53.5% - 0s Cutting planes: Clique: 59 Zero half: 2 Explored 147 nodes (7523 simplex iterations) in 1.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%