Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:59 2012 Optimize a model with 1254 rows, 72 columns and 2508 nonzeros Presolve removed 883 rows and 0 columns Presolve time: 0.02s Presolved: 371 rows, 72 columns, 2207 nonzeros Variable types: 0 continuous, 72 integer (72 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.200792e+01, 239 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.00792 0 65 8.00000 12.00792 50.1% - 0s H 0 0 9.0000000 12.00792 33.4% - 0s 0 0 11.52122 0 72 9.00000 11.52122 28.0% - 0s 0 0 11.46578 0 71 9.00000 11.46578 27.4% - 0s 0 0 11.45094 0 72 9.00000 11.45094 27.2% - 0s 0 2 11.45073 0 72 9.00000 11.45073 27.2% - 0s Cutting planes: Clique: 35 Zero half: 2 Explored 17 nodes (1210 simplex iterations) in 0.21 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%