Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:05:31 2012 Optimize a model with 843 rows, 129 columns and 1686 nonzeros Presolve removed 320 rows and 0 columns Presolve time: 0.01s Presolved: 523 rows, 129 columns, 1346 nonzeros Variable types: 0 continuous, 129 integer (129 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 4.333945e+01, 317 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.33945 0 122 31.00000 43.33945 39.8% - 0s 0 0 42.79327 0 124 31.00000 42.79327 38.0% - 0s 0 0 42.69788 0 126 31.00000 42.69788 37.7% - 0s 0 0 42.48775 0 128 31.00000 42.48775 37.1% - 0s 0 0 42.21825 0 127 31.00000 42.21825 36.2% - 0s H 0 0 34.0000000 42.21825 24.2% - 0s 0 0 41.76859 0 128 34.00000 41.76859 22.8% - 0s 0 0 41.64189 0 126 34.00000 41.64189 22.5% - 0s 0 0 41.57484 0 127 34.00000 41.57484 22.3% - 0s 0 0 41.49360 0 123 34.00000 41.49360 22.0% - 0s 0 0 41.45119 0 127 34.00000 41.45119 21.9% - 0s 0 0 41.39298 0 128 34.00000 41.39298 21.7% - 0s 0 0 41.35826 0 128 34.00000 41.35826 21.6% - 0s 0 0 41.33753 0 127 34.00000 41.33753 21.6% - 0s 0 0 41.32362 0 127 34.00000 41.32362 21.5% - 0s 0 0 41.32362 0 127 34.00000 41.32362 21.5% - 0s 0 2 41.32102 0 127 34.00000 41.32102 21.5% - 0s 615 195 36.00000 17 125 34.00000 38.76474 14.0% 33.9 5s H 1388 204 35.0000000 38.20000 9.14% 35.0 8s Cutting planes: Gomory: 4 Clique: 2 Zero half: 45 Explored 2019 nodes (63243 simplex iterations) in 9.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%