Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:08:49 2012 Optimize a model with 4317 rows, 131 columns and 8634 nonzeros Presolve removed 3088 rows and 0 columns Presolve time: 0.14s Presolved: 1229 rows, 131 columns, 8497 nonzeros Variable types: 0 continuous, 131 integer (131 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.719656e+01, 646 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17.19656 0 128 7.00000 17.19656 146% - 0s H 0 0 8.0000000 17.19656 115% - 0s 0 0 16.71054 0 131 8.00000 16.71054 109% - 0s 0 0 16.61317 0 131 8.00000 16.61317 108% - 0s 0 0 16.52482 0 130 8.00000 16.52482 107% - 0s 0 0 16.46163 0 131 8.00000 16.46163 106% - 1s 0 0 16.44769 0 131 8.00000 16.44769 106% - 1s H 0 0 9.0000000 16.44769 82.8% - 1s 0 0 16.42182 0 131 9.00000 16.42182 82.5% - 1s 0 0 16.41346 0 131 9.00000 16.41346 82.4% - 1s 0 0 16.39883 0 131 9.00000 16.39883 82.2% - 1s 0 0 16.38772 0 131 9.00000 16.38772 82.1% - 1s 0 0 16.38701 0 131 9.00000 16.38701 82.1% - 2s 0 0 16.38221 0 131 9.00000 16.38221 82.0% - 2s 0 0 16.38086 0 130 9.00000 16.38086 82.0% - 2s 0 0 16.37436 0 130 9.00000 16.37436 81.9% - 2s 0 0 16.37306 0 130 9.00000 16.37306 81.9% - 2s 0 0 16.37130 0 130 9.00000 16.37130 81.9% - 2s 0 0 16.37023 0 130 9.00000 16.37023 81.9% - 3s 0 2 16.36955 0 130 9.00000 16.36955 81.9% - 3s 260 159 12.31172 12 64 9.00000 14.89145 65.5% 76.0 5s 801 232 11.08226 28 130 9.00000 12.39333 37.7% 59.5 11s 889 289 10.51848 51 46 9.00000 12.39333 37.7% 77.2 15s 1846 205 10.80198 40 49 9.00000 11.38899 26.5% 58.6 20s Cutting planes: Clique: 71 Explored 2265 nodes (119049 simplex iterations) in 20.98 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%