Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:47:42 2012 Optimize a model with 2409 rows, 98 columns and 4818 nonzeros Presolve removed 1720 rows and 0 columns Presolve time: 0.07s Presolved: 689 rows, 98 columns, 4671 nonzeros Variable types: 0 continuous, 98 integer (98 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.397152e+01, 437 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.97152 0 91 8.00000 13.97152 74.6% - 0s 0 0 13.62288 0 96 8.00000 13.62288 70.3% - 0s H 0 0 9.0000000 13.62288 51.4% - 0s 0 0 13.57185 0 95 9.00000 13.57185 50.8% - 0s 0 0 13.54828 0 96 9.00000 13.54828 50.5% - 0s 0 0 13.48278 0 97 9.00000 13.48278 49.8% - 0s 0 0 13.41760 0 97 9.00000 13.41760 49.1% - 0s 0 0 13.40498 0 98 9.00000 13.40498 48.9% - 0s 0 0 13.40204 0 98 9.00000 13.40204 48.9% - 0s 0 2 13.40147 0 98 9.00000 13.40147 48.9% - 0s Cutting planes: Clique: 84 Explored 136 nodes (8787 simplex iterations) in 1.26 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%