Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:53:22 2012 Optimize a model with 689 rows, 118 columns and 1378 nonzeros Presolve removed 243 rows and 0 columns Presolve time: 0.00s Presolved: 446 rows, 118 columns, 1094 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 4.149020e+01, 289 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.49020 0 113 31.00000 41.49020 33.8% - 0s 0 0 40.84227 0 111 31.00000 40.84227 31.7% - 0s H 0 0 32.0000000 40.84227 27.6% - 0s 0 0 40.49382 0 114 32.00000 40.49382 26.5% - 0s 0 0 40.18430 0 114 32.00000 40.18430 25.6% - 0s 0 0 40.12153 0 114 32.00000 40.12153 25.4% - 0s 0 0 39.92346 0 113 32.00000 39.92346 24.8% - 0s 0 0 39.84920 0 115 32.00000 39.84920 24.5% - 0s H 0 0 33.0000000 39.84920 20.8% - 0s 0 0 39.79873 0 115 33.00000 39.79873 20.6% - 0s 0 0 39.64542 0 113 33.00000 39.64542 20.1% - 0s 0 0 39.59265 0 114 33.00000 39.59265 20.0% - 0s 0 0 39.49148 0 115 33.00000 39.49148 19.7% - 0s 0 0 39.39545 0 116 33.00000 39.39545 19.4% - 0s 0 0 39.34258 0 116 33.00000 39.34258 19.2% - 0s 0 0 39.27816 0 115 33.00000 39.27816 19.0% - 0s 0 0 39.21459 0 113 33.00000 39.21459 18.8% - 0s 0 0 39.11456 0 113 33.00000 39.11456 18.5% - 0s 0 0 39.07100 0 114 33.00000 39.07100 18.4% - 0s 0 0 39.04752 0 114 33.00000 39.04752 18.3% - 0s 0 0 39.02718 0 113 33.00000 39.02718 18.3% - 0s 0 0 39.01423 0 115 33.00000 39.01423 18.2% - 0s 0 0 39.01423 0 114 33.00000 39.01423 18.2% - 0s 0 2 39.01420 0 114 33.00000 39.01420 18.2% - 0s H 27 7 34.0000000 38.87681 14.3% 29.0 0s Cutting planes: Clique: 4 Zero half: 77 Explored 423 nodes (16323 simplex iterations) in 0.72 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%