Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:46:56 2012 Optimize a model with 2230 rows, 95 columns and 4460 nonzeros Presolve removed 1604 rows and 0 columns Presolve time: 0.06s Presolved: 626 rows, 95 columns, 4176 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.359407e+01, 308 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.59407 0 89 7.00000 13.59407 94.2% - 0s 0 0 13.33299 0 95 7.00000 13.33299 90.5% - 0s H 0 0 8.0000000 13.33299 66.7% - 0s 0 0 13.25448 0 95 8.00000 13.25448 65.7% - 0s H 0 0 9.0000000 13.25448 47.3% - 0s 0 0 13.21518 0 95 9.00000 13.21518 46.8% - 0s 0 0 13.20720 0 95 9.00000 13.20720 46.7% - 0s 0 0 13.20703 0 95 9.00000 13.20703 46.7% - 0s 0 2 13.20487 0 95 9.00000 13.20487 46.7% - 0s Cutting planes: Clique: 56 Zero half: 3 Explored 106 nodes (7710 simplex iterations) in 1.04 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%