Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:29 2012 Optimize a model with 910 rows, 60 columns and 1820 nonzeros Presolve removed 654 rows and 0 columns Presolve time: 0.01s Presolved: 256 rows, 60 columns, 1527 nonzeros Variable types: 0 continuous, 60 integer (60 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 9.950729e+00, 108 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 9.95073 0 50 7.00000 9.95073 42.2% - 0s 0 0 9.61877 0 55 7.00000 9.61877 37.4% - 0s 0 0 9.57412 0 54 7.00000 9.57412 36.8% - 0s 0 0 9.56739 0 56 7.00000 9.56739 36.7% - 0s 0 0 9.55507 0 58 7.00000 9.55507 36.5% - 0s H 0 0 8.0000000 9.55507 19.4% - 0s 0 0 9.55059 0 56 8.00000 9.55059 19.4% - 0s 0 0 9.54293 0 56 8.00000 9.54293 19.3% - 0s 0 0 9.54130 0 57 8.00000 9.54130 19.3% - 0s 0 0 9.54050 0 57 8.00000 9.54050 19.3% - 0s 0 2 9.53954 0 57 8.00000 9.53954 19.2% - 0s Cutting planes: Clique: 26 Zero half: 1 Explored 9 nodes (462 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%