Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:15 2012 Optimize a model with 664 rows, 116 columns and 1328 nonzeros Presolve removed 237 rows and 0 columns Presolve time: 0.00s Presolved: 427 rows, 116 columns, 1067 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.014295e+01, 250 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.14295 0 116 28.00000 40.14295 43.4% - 0s 0 0 39.72373 0 116 28.00000 39.72373 41.9% - 0s 0 0 39.52099 0 115 28.00000 39.52099 41.1% - 0s 0 0 39.40230 0 115 28.00000 39.40230 40.7% - 0s 0 0 39.14700 0 115 28.00000 39.14700 39.8% - 0s 0 0 39.03987 0 116 28.00000 39.03987 39.4% - 0s 0 0 38.87827 0 115 28.00000 38.87827 38.9% - 0s 0 0 38.81188 0 116 28.00000 38.81188 38.6% - 0s 0 0 38.68626 0 114 28.00000 38.68626 38.2% - 0s 0 0 38.53418 0 114 28.00000 38.53418 37.6% - 0s H 0 0 29.0000000 38.53418 32.9% - 0s 0 0 38.42313 0 116 29.00000 38.42313 32.5% - 0s 0 0 38.35670 0 115 29.00000 38.35670 32.3% - 0s 0 0 38.28127 0 116 29.00000 38.28127 32.0% - 0s 0 0 38.24416 0 116 29.00000 38.24416 31.9% - 0s 0 0 38.16130 0 116 29.00000 38.16130 31.6% - 0s 0 0 38.09590 0 115 29.00000 38.09590 31.4% - 0s 0 0 38.04637 0 115 29.00000 38.04637 31.2% - 0s 0 0 37.97253 0 114 29.00000 37.97253 30.9% - 0s 0 0 37.95593 0 115 29.00000 37.95593 30.9% - 0s 0 2 37.95556 0 115 29.00000 37.95556 30.9% - 0s H 19 17 30.0000000 37.95556 26.5% 56.5 0s H 51 25 32.0000000 37.63887 17.6% 42.5 0s Cutting planes: Clique: 3 Zero half: 85 Explored 1058 nodes (30894 simplex iterations) in 1.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%