Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:17 2012 Optimize a model with 568 rows, 48 columns and 1136 nonzeros Presolve removed 401 rows and 0 columns Presolve time: 0.01s Presolved: 167 rows, 48 columns, 908 nonzeros Variable types: 0 continuous, 48 integer (48 binary) Found heuristic solution: objective 5.0000000 Root relaxation: objective 8.539062e+00, 102 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8.53906 0 39 5.00000 8.53906 70.8% - 0s H 0 0 6.0000000 8.53906 42.3% - 0s H 0 0 7.0000000 8.53906 22.0% - 0s 0 0 8.28455 0 46 7.00000 8.28455 18.4% - 0s 0 0 8.20703 0 46 7.00000 8.20703 17.2% - 0s 0 0 8.17815 0 45 7.00000 8.17815 16.8% - 0s 0 0 8.15987 0 45 7.00000 8.15987 16.6% - 0s 0 0 8.15593 0 43 7.00000 8.15593 16.5% - 0s 0 0 8.15593 0 43 7.00000 8.15593 16.5% - 0s 0 0 8.15593 0 43 7.00000 8.15593 16.5% - 0s 0 2 8.14899 0 43 7.00000 8.14899 16.4% - 0s Cutting planes: Gomory: 2 Clique: 9 Zero half: 12 Explored 5 nodes (381 simplex iterations) in 0.06 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%