Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:41 2012 Optimize a model with 1113 rows, 66 columns and 2226 nonzeros Presolve removed 797 rows and 0 columns Presolve time: 0.02s Presolved: 316 rows, 66 columns, 1985 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.073568e+01, 135 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.73568 0 54 7.00000 10.73568 53.4% - 0s H 0 0 8.0000000 10.73568 34.2% - 0s 0 0 10.21886 0 63 8.00000 10.21886 27.7% - 0s 0 0 10.13728 0 62 8.00000 10.13728 26.7% - 0s 0 0 10.09753 0 64 8.00000 10.09753 26.2% - 0s 0 0 10.09718 0 65 8.00000 10.09718 26.2% - 0s 0 0 10.09417 0 65 8.00000 10.09417 26.2% - 0s 0 2 10.09021 0 65 8.00000 10.09021 26.1% - 0s Cutting planes: Clique: 30 Zero half: 3 Explored 17 nodes (931 simplex iterations) in 0.15 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%