Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:55:28 2012 Optimize a model with 3328 rows, 116 columns and 6656 nonzeros Presolve removed 2370 rows and 0 columns Presolve time: 0.10s Presolved: 958 rows, 116 columns, 6485 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.578256e+01, 447 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.78256 0 112 7.00000 15.78256 125% - 0s H 0 0 8.0000000 15.78256 97.3% - 0s 0 0 15.40705 0 116 8.00000 15.40705 92.6% - 0s 0 0 15.36270 0 116 8.00000 15.36270 92.0% - 0s 0 0 15.32586 0 115 8.00000 15.32586 91.6% - 0s 0 0 15.29061 0 115 8.00000 15.29061 91.1% - 0s 0 0 15.27897 0 115 8.00000 15.27897 91.0% - 0s H 0 0 9.0000000 15.27897 69.8% - 0s 0 0 15.27721 0 116 9.00000 15.27721 69.7% - 0s 0 0 15.27705 0 116 9.00000 15.27705 69.7% - 1s 0 0 15.27694 0 116 9.00000 15.27694 69.7% - 1s 0 0 15.27690 0 116 9.00000 15.27690 69.7% - 1s 0 2 15.27629 0 116 9.00000 15.27629 69.7% - 1s Cutting planes: Clique: 86 Zero half: 1 Explored 561 nodes (34401 simplex iterations) in 3.76 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%