Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:47:19 2012 Optimize a model with 2305 rows, 96 columns and 4610 nonzeros Presolve removed 1660 rows and 0 columns Presolve time: 0.06s Presolved: 645 rows, 96 columns, 4388 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.363578e+01, 305 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.63578 0 89 8.00000 13.63578 70.4% - 0s 0 0 13.35089 0 94 8.00000 13.35089 66.9% - 0s 0 0 13.29351 0 95 8.00000 13.29351 66.2% - 0s 0 0 13.26418 0 95 8.00000 13.26418 65.8% - 0s 0 0 13.26275 0 95 8.00000 13.26275 65.8% - 0s H 0 0 9.0000000 13.26275 47.4% - 0s 0 0 13.26231 0 95 9.00000 13.26231 47.4% - 0s 0 2 13.25576 0 95 9.00000 13.25576 47.3% - 0s Cutting planes: Clique: 39 Zero half: 7 Explored 121 nodes (8138 simplex iterations) in 0.95 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%