Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:51:27 2012 Optimize a model with 2926 rows, 108 columns and 5852 nonzeros Presolve removed 2089 rows and 0 columns Presolve time: 0.09s Presolved: 837 rows, 108 columns, 5770 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.467326e+01, 402 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.67326 0 102 7.00000 14.67326 110% - 0s H 0 0 8.0000000 14.67326 83.4% - 0s 0 0 14.18950 0 107 8.00000 14.18950 77.4% - 0s 0 0 14.12560 0 105 8.00000 14.12560 76.6% - 0s 0 0 14.04784 0 105 8.00000 14.04784 75.6% - 0s 0 0 14.03966 0 107 8.00000 14.03966 75.5% - 0s 0 0 14.03294 0 107 8.00000 14.03294 75.4% - 0s H 0 0 9.0000000 14.03294 55.9% - 0s 0 0 14.02282 0 107 9.00000 14.02282 55.8% - 0s 0 0 14.01961 0 107 9.00000 14.01961 55.8% - 1s 0 2 14.01921 0 107 9.00000 14.01921 55.8% - 1s Cutting planes: Clique: 91 Zero half: 1 Explored 251 nodes (15707 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%