Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:51 2012 Optimize a model with 1659 rows, 82 columns and 3318 nonzeros Presolve removed 1163 rows and 0 columns Presolve time: 0.04s Presolved: 496 rows, 82 columns, 3205 nonzeros Variable types: 0 continuous, 82 integer (82 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.240311e+01, 328 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.40311 0 82 7.00000 12.40311 77.2% - 0s H 0 0 8.0000000 12.40311 55.0% - 0s 0 0 12.17577 0 82 8.00000 12.17577 52.2% - 0s 0 0 12.13916 0 81 8.00000 12.13916 51.7% - 0s 0 0 12.12080 0 81 8.00000 12.12080 51.5% - 0s 0 0 12.11382 0 81 8.00000 12.11382 51.4% - 0s 0 0 12.10090 0 80 8.00000 12.10090 51.3% - 0s 0 0 12.08853 0 82 8.00000 12.08853 51.1% - 0s 0 0 12.08341 0 82 8.00000 12.08341 51.0% - 0s 0 0 12.04682 0 81 8.00000 12.04682 50.6% - 0s 0 0 12.03261 0 82 8.00000 12.03261 50.4% - 0s 0 0 12.02886 0 82 8.00000 12.02886 50.4% - 0s H 0 0 9.0000000 12.02886 33.7% - 0s 0 0 12.02198 0 82 9.00000 12.02198 33.6% - 0s 0 0 12.01410 0 82 9.00000 12.01410 33.5% - 0s 0 0 12.01393 0 82 9.00000 12.01393 33.5% - 0s 0 2 12.00767 0 82 9.00000 12.00767 33.4% - 0s Cutting planes: Clique: 39 Zero half: 8 Explored 38 nodes (3616 simplex iterations) in 0.80 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%