Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:46:22 2012 Optimize a model with 2138 rows, 92 columns and 4276 nonzeros Presolve removed 1529 rows and 0 columns Presolve time: 0.06s Presolved: 609 rows, 92 columns, 4147 nonzeros Variable types: 0 continuous, 92 integer (92 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.327187e+01, 318 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.27187 0 81 7.00000 13.27187 89.6% - 0s H 0 0 8.0000000 13.27187 65.9% - 0s 0 0 12.84259 0 88 8.00000 12.84259 60.5% - 0s 0 0 12.74031 0 90 8.00000 12.74031 59.3% - 0s 0 0 12.71179 0 91 8.00000 12.71179 58.9% - 0s H 0 0 9.0000000 12.71179 41.2% - 0s 0 0 12.68839 0 90 9.00000 12.68839 41.0% - 0s 0 0 12.66213 0 89 9.00000 12.66213 40.7% - 0s 0 0 12.64006 0 92 9.00000 12.64006 40.4% - 0s 0 0 12.63423 0 92 9.00000 12.63423 40.4% - 0s 0 0 12.63416 0 92 9.00000 12.63416 40.4% - 0s 0 2 12.63364 0 92 9.00000 12.63364 40.4% - 0s Cutting planes: Clique: 87 Explored 63 nodes (5419 simplex iterations) in 1.10 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%