Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:48:58 2012 Optimize a model with 2575 rows, 102 columns and 5150 nonzeros Presolve removed 1837 rows and 0 columns Presolve time: 0.07s Presolved: 738 rows, 102 columns, 4942 nonzeros Variable types: 0 continuous, 102 integer (102 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.435263e+01, 410 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.35263 0 97 7.00000 14.35263 105% - 0s H 0 0 8.0000000 14.35263 79.4% - 0s 0 0 13.98606 0 102 8.00000 13.98606 74.8% - 0s 0 0 13.93415 0 102 8.00000 13.93415 74.2% - 0s 0 0 13.90883 0 102 8.00000 13.90883 73.9% - 0s 0 0 13.90802 0 102 8.00000 13.90802 73.9% - 0s H 0 0 9.0000000 13.90802 54.5% - 0s 0 0 13.90703 0 102 9.00000 13.90703 54.5% - 0s 0 2 13.90273 0 102 9.00000 13.90273 54.5% - 0s Cutting planes: Clique: 92 Explored 189 nodes (12572 simplex iterations) in 1.62 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%