Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:07:16 2012 Optimize a model with 859 rows, 130 columns and 1718 nonzeros Presolve removed 339 rows and 0 columns Presolve time: 0.01s Presolved: 520 rows, 130 columns, 1355 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 4.358806e+01, 386 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.58806 0 127 27.00000 43.58806 61.4% - 0s H 0 0 28.0000000 43.58806 55.7% - 0s 0 0 43.19258 0 129 28.00000 43.19258 54.3% - 0s H 0 0 31.0000000 43.19258 39.3% - 0s 0 0 42.79057 0 129 31.00000 42.79057 38.0% - 0s 0 0 42.57921 0 127 31.00000 42.57921 37.4% - 0s H 0 0 33.0000000 42.57921 29.0% - 0s 0 0 42.46755 0 129 33.00000 42.46755 28.7% - 0s 0 0 42.42609 0 130 33.00000 42.42609 28.6% - 0s 0 0 42.37371 0 130 33.00000 42.37371 28.4% - 0s 0 0 42.31911 0 130 33.00000 42.31911 28.2% - 0s 0 0 42.14755 0 130 33.00000 42.14755 27.7% - 0s 0 0 42.13034 0 127 33.00000 42.13034 27.7% - 0s 0 0 42.08505 0 129 33.00000 42.08505 27.5% - 0s 0 0 41.99835 0 130 33.00000 41.99835 27.3% - 0s 0 0 41.99335 0 130 33.00000 41.99335 27.3% - 0s 0 0 41.99335 0 130 33.00000 41.99335 27.3% - 0s 0 2 41.99158 0 130 33.00000 41.99158 27.2% - 0s 613 203 36.27273 8 130 33.00000 38.94545 18.0% 32.4 5s 3332 786 35.06250 30 82 33.00000 36.55000 10.8% 28.2 10s * 3411 613 29 34.0000000 36.53061 7.44% 27.9 10s Cutting planes: Gomory: 4 Clique: 1 Zero half: 39 Explored 4413 nodes (114208 simplex iterations) in 10.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%