Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:02 2012 Optimize a model with 1732 rows, 84 columns and 3464 nonzeros Presolve removed 1231 rows and 0 columns Presolve time: 0.04s Presolved: 501 rows, 84 columns, 3141 nonzeros Variable types: 0 continuous, 84 integer (84 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.286458e+01, 247 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.86458 0 81 8.00000 12.86458 60.8% - 0s 0 0 12.62920 0 84 8.00000 12.62920 57.9% - 0s 0 0 12.55480 0 83 8.00000 12.55480 56.9% - 0s 0 0 12.55046 0 83 8.00000 12.55046 56.9% - 0s 0 0 12.54946 0 83 8.00000 12.54946 56.9% - 0s 0 0 12.52746 0 83 8.00000 12.52746 56.6% - 0s 0 0 12.51351 0 84 8.00000 12.51351 56.4% - 0s 0 0 12.50050 0 84 8.00000 12.50050 56.3% - 0s 0 0 12.48962 0 84 8.00000 12.48962 56.1% - 0s 0 0 12.47679 0 84 8.00000 12.47679 56.0% - 0s H 0 0 9.0000000 12.47679 38.6% - 0s 0 0 12.46480 0 83 9.00000 12.46480 38.5% - 0s 0 0 12.46301 0 83 9.00000 12.46301 38.5% - 0s 0 0 12.46282 0 83 9.00000 12.46282 38.5% - 0s 0 2 12.46236 0 83 9.00000 12.46236 38.5% - 0s Cutting planes: Clique: 33 Zero half: 7 Explored 66 nodes (3898 simplex iterations) in 0.84 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%