Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:57:22 2012 Optimize a model with 755 rows, 123 columns and 1510 nonzeros Presolve removed 265 rows and 0 columns Presolve time: 0.01s Presolved: 490 rows, 123 columns, 1221 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 4.287883e+01, 310 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.87883 0 121 26.00000 42.87883 64.9% - 0s H 0 0 27.0000000 42.87883 58.8% - 0s 0 0 42.32979 0 123 27.00000 42.32979 56.8% - 0s H 0 0 28.0000000 42.32979 51.2% - 0s 0 0 42.00188 0 123 28.00000 42.00188 50.0% - 0s H 0 0 29.0000000 42.00188 44.8% - 0s 0 0 41.77021 0 122 29.00000 41.77021 44.0% - 0s 0 0 41.40912 0 122 29.00000 41.40912 42.8% - 0s 0 0 41.23389 0 121 29.00000 41.23389 42.2% - 0s 0 0 41.00010 0 123 29.00000 41.00010 41.4% - 0s 0 0 40.87623 0 123 29.00000 40.87623 41.0% - 0s 0 0 40.83088 0 122 29.00000 40.83088 40.8% - 0s H 0 0 30.0000000 40.83088 36.1% - 0s 0 0 40.80079 0 122 30.00000 40.80079 36.0% - 0s 0 0 40.77313 0 121 30.00000 40.77313 35.9% - 0s 0 0 40.77237 0 122 30.00000 40.77237 35.9% - 0s 0 0 40.77237 0 122 30.00000 40.77237 35.9% - 0s 0 2 40.77221 0 122 30.00000 40.77221 35.9% - 0s H 15 15 31.0000000 40.77221 31.5% 49.5 0s * 145 68 14 32.0000000 39.45896 23.3% 36.6 0s 610 258 36.45714 7 123 32.00000 38.03414 18.9% 31.0 5s H 1139 323 33.0000000 38.03414 15.3% 34.6 8s 2371 388 34.01449 18 80 33.00000 36.02358 9.16% 29.6 10s Cutting planes: Gomory: 2 Zero half: 43 Explored 3374 nodes (92112 simplex iterations) in 10.92 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%