Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:41 2012 Optimize a model with 1077 rows, 66 columns and 2154 nonzeros Presolve removed 746 rows and 0 columns Presolve time: 0.02s Presolved: 331 rows, 66 columns, 1993 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.068464e+01, 224 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.68464 0 64 7.00000 10.68464 52.6% - 0s H 0 0 8.0000000 10.68464 33.6% - 0s 0 0 10.51113 0 65 8.00000 10.51113 31.4% - 0s 0 0 10.44732 0 64 8.00000 10.44732 30.6% - 0s 0 0 10.41394 0 65 8.00000 10.41394 30.2% - 0s 0 0 10.39885 0 65 8.00000 10.39885 30.0% - 0s 0 0 10.39581 0 65 8.00000 10.39581 29.9% - 0s 0 2 10.39241 0 65 8.00000 10.39241 29.9% - 0s Cutting planes: Gomory: 2 Clique: 8 Zero half: 15 Explored 19 nodes (1440 simplex iterations) in 0.17 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%