Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:53:06 2012 Optimize a model with 3087 rows, 112 columns and 6174 nonzeros Presolve removed 2196 rows and 0 columns Presolve time: 0.10s Presolved: 891 rows, 112 columns, 6019 nonzeros Variable types: 0 continuous, 112 integer (112 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.574122e+01, 448 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.74122 0 107 7.00000 15.74122 125% - 0s H 0 0 8.0000000 15.74122 96.8% - 0s 0 0 15.13451 0 112 8.00000 15.13451 89.2% - 0s 0 0 15.09377 0 112 8.00000 15.09377 88.7% - 0s 0 0 15.04246 0 112 8.00000 15.04246 88.0% - 0s H 0 0 9.0000000 15.04246 67.1% - 0s 0 0 15.03318 0 112 9.00000 15.03318 67.0% - 0s 0 0 15.03254 0 112 9.00000 15.03254 67.0% - 0s 0 2 15.03112 0 112 9.00000 15.03112 67.0% - 1s Cutting planes: Clique: 89 Zero half: 1 Explored 413 nodes (25999 simplex iterations) in 2.75 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%