Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:50:32 2012 Optimize a model with 2757 rows, 106 columns and 5514 nonzeros Presolve removed 1941 rows and 0 columns Presolve time: 0.09s Presolved: 816 rows, 106 columns, 5621 nonzeros Variable types: 0 continuous, 106 integer (106 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.475973e+01, 388 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.75973 0 102 6.00000 14.75973 146% - 0s H 0 0 7.0000000 14.75973 111% - 0s 0 0 14.41866 0 104 7.00000 14.41866 106% - 0s H 0 0 8.0000000 14.41866 80.2% - 0s 0 0 14.37454 0 104 8.00000 14.37454 79.7% - 0s 0 0 14.34113 0 104 8.00000 14.34113 79.3% - 0s 0 0 14.33340 0 106 8.00000 14.33340 79.2% - 0s 0 0 14.32232 0 106 8.00000 14.32232 79.0% - 0s H 0 0 9.0000000 14.32232 59.1% - 0s 0 0 14.31028 0 106 9.00000 14.31028 59.0% - 0s 0 0 14.29879 0 106 9.00000 14.29879 58.9% - 0s 0 0 14.29671 0 106 9.00000 14.29671 58.9% - 1s 0 0 14.29666 0 106 9.00000 14.29666 58.9% - 1s 0 0 14.29665 0 106 9.00000 14.29665 58.9% - 1s 0 2 14.29349 0 106 9.00000 14.29349 58.8% - 1s Cutting planes: Clique: 64 Zero half: 4 Explored 257 nodes (16198 simplex iterations) in 2.54 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%