Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:50:27 2012 Optimize a model with 2775 rows, 106 columns and 5550 nonzeros Presolve removed 1956 rows and 0 columns Presolve time: 0.09s Presolved: 819 rows, 106 columns, 5526 nonzeros Variable types: 0 continuous, 106 integer (106 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.480794e+01, 444 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.80794 0 100 7.00000 14.80794 112% - 0s 0 0 14.42223 0 103 7.00000 14.42223 106% - 0s H 0 0 8.0000000 14.42223 80.3% - 0s 0 0 14.37661 0 104 8.00000 14.37661 79.7% - 0s 0 0 14.33777 0 105 8.00000 14.33777 79.2% - 0s 0 0 14.32117 0 104 8.00000 14.32117 79.0% - 0s H 0 0 9.0000000 14.32117 59.1% - 0s 0 0 14.29724 0 105 9.00000 14.29724 58.9% - 0s 0 0 14.28944 0 105 9.00000 14.28944 58.8% - 0s 0 0 14.28338 0 104 9.00000 14.28338 58.7% - 0s 0 0 14.28294 0 105 9.00000 14.28294 58.7% - 1s 0 2 14.28228 0 105 9.00000 14.28228 58.7% - 1s Cutting planes: Clique: 82 Zero half: 3 Explored 280 nodes (16592 simplex iterations) in 2.35 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%