Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:54:58 2012 Optimize a model with 3255 rows, 115 columns and 6510 nonzeros Presolve removed 2352 rows and 0 columns Presolve time: 0.11s Presolved: 903 rows, 115 columns, 6197 nonzeros Variable types: 0 continuous, 115 integer (115 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.563292e+01, 506 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.63292 0 113 7.00000 15.63292 123% - 0s 0 0 15.42900 0 114 7.00000 15.42900 120% - 0s H 0 0 8.0000000 15.42900 92.9% - 0s 0 0 15.34642 0 115 8.00000 15.34642 91.8% - 0s 0 0 15.29234 0 114 8.00000 15.29234 91.2% - 0s H 0 0 9.0000000 15.29234 69.9% - 0s 0 0 15.27573 0 115 9.00000 15.27573 69.7% - 0s 0 0 15.26895 0 115 9.00000 15.26895 69.7% - 0s 0 0 15.26835 0 115 9.00000 15.26835 69.6% - 0s 0 0 15.26770 0 115 9.00000 15.26770 69.6% - 1s 0 2 15.26650 0 115 9.00000 15.26650 69.6% - 1s Cutting planes: Clique: 53 Zero half: 4 Explored 529 nodes (32100 simplex iterations) in 3.10 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%