Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:23 2012 Optimize a model with 1847 rows, 86 columns and 3694 nonzeros Presolve removed 1337 rows and 0 columns Presolve time: 0.04s Presolved: 510 rows, 86 columns, 3382 nonzeros Variable types: 0 continuous, 86 integer (86 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.302938e+01, 283 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.02938 0 79 7.00000 13.02938 86.1% - 0s H 0 0 8.0000000 13.02938 62.9% - 0s 0 0 12.62912 0 80 8.00000 12.62912 57.9% - 0s 0 0 12.57817 0 81 8.00000 12.57817 57.2% - 0s 0 0 12.55065 0 82 8.00000 12.55065 56.9% - 0s 0 0 12.53828 0 82 8.00000 12.53828 56.7% - 0s 0 0 12.53583 0 81 8.00000 12.53583 56.7% - 0s 0 0 12.53386 0 82 8.00000 12.53386 56.7% - 0s H 0 0 9.0000000 12.53386 39.3% - 0s 0 0 12.52319 0 83 9.00000 12.52319 39.1% - 0s 0 0 12.52182 0 83 9.00000 12.52182 39.1% - 0s 0 0 12.51047 0 83 9.00000 12.51047 39.0% - 0s 0 0 12.50767 0 82 9.00000 12.50767 39.0% - 0s 0 0 12.50667 0 83 9.00000 12.50667 39.0% - 0s 0 2 12.50394 0 83 9.00000 12.50394 38.9% - 0s Cutting planes: Clique: 60 Zero half: 2 Explored 53 nodes (3501 simplex iterations) in 0.80 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%