Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:51:11 2012 Optimize a model with 2886 rows, 108 columns and 5772 nonzeros Presolve removed 2073 rows and 0 columns Presolve time: 0.09s Presolved: 813 rows, 108 columns, 5535 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.487242e+01, 413 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.87242 0 104 8.00000 14.87242 85.9% - 0s 0 0 14.54418 0 106 8.00000 14.54418 81.8% - 0s 0 0 14.49909 0 107 8.00000 14.49909 81.2% - 0s H 0 0 9.0000000 14.49909 61.1% - 0s 0 0 14.48049 0 107 9.00000 14.48049 60.9% - 0s 0 0 14.47308 0 107 9.00000 14.47308 60.8% - 0s 0 0 14.46234 0 107 9.00000 14.46234 60.7% - 0s 0 0 14.45983 0 107 9.00000 14.45983 60.7% - 0s 0 0 14.45879 0 107 9.00000 14.45879 60.7% - 0s 0 0 14.45865 0 107 9.00000 14.45865 60.7% - 1s 0 2 14.45719 0 107 9.00000 14.45719 60.6% - 1s Cutting planes: Clique: 66 Zero half: 3 Explored 312 nodes (18514 simplex iterations) in 2.27 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%