Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:47:00 2012 Optimize a model with 2251 rows, 95 columns and 4502 nonzeros Presolve removed 1609 rows and 0 columns Presolve time: 0.07s Presolved: 642 rows, 95 columns, 4325 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.383512e+01, 455 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.83512 0 88 7.00000 13.83512 97.6% - 0s H 0 0 8.0000000 13.83512 72.9% - 0s 0 0 13.29504 0 92 8.00000 13.29504 66.2% - 0s 0 0 13.20187 0 93 8.00000 13.20187 65.0% - 0s 0 0 13.18696 0 95 8.00000 13.18696 64.8% - 0s 0 0 13.17269 0 95 8.00000 13.17269 64.7% - 0s 0 0 13.16520 0 95 8.00000 13.16520 64.6% - 0s 0 0 13.15608 0 95 8.00000 13.15608 64.5% - 0s 0 0 13.15420 0 95 8.00000 13.15420 64.4% - 0s 0 0 13.15265 0 95 8.00000 13.15265 64.4% - 0s H 0 0 9.0000000 13.15265 46.1% - 0s 0 0 13.15239 0 95 9.00000 13.15239 46.1% - 0s 0 2 13.15136 0 95 9.00000 13.15136 46.1% - 0s Cutting planes: Clique: 74 Zero half: 2 Explored 119 nodes (7806 simplex iterations) in 1.28 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%