Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:54 2012 Optimize a model with 572 rows, 107 columns and 1144 nonzeros Presolve removed 205 rows and 0 columns Presolve time: 0.00s Presolved: 367 rows, 107 columns, 911 nonzeros Variable types: 0 continuous, 107 integer (107 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.726087e+01, 285 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.26087 0 103 28.00000 37.26087 33.1% - 0s H 0 0 29.0000000 37.26087 28.5% - 0s 0 0 36.82234 0 106 29.00000 36.82234 27.0% - 0s 0 0 36.63235 0 107 29.00000 36.63235 26.3% - 0s H 0 0 30.0000000 36.63235 22.1% - 0s 0 0 36.55028 0 106 30.00000 36.55028 21.8% - 0s 0 0 36.42986 0 103 30.00000 36.42986 21.4% - 0s 0 0 36.30040 0 106 30.00000 36.30040 21.0% - 0s 0 0 36.18172 0 104 30.00000 36.18172 20.6% - 0s 0 0 36.10836 0 105 30.00000 36.10836 20.4% - 0s 0 0 36.02603 0 105 30.00000 36.02603 20.1% - 0s 0 0 35.91752 0 105 30.00000 35.91752 19.7% - 0s 0 0 35.90532 0 104 30.00000 35.90532 19.7% - 0s 0 0 35.82569 0 105 30.00000 35.82569 19.4% - 0s 0 0 35.80899 0 106 30.00000 35.80899 19.4% - 0s 0 0 35.78984 0 104 30.00000 35.78984 19.3% - 0s 0 0 35.78203 0 104 30.00000 35.78203 19.3% - 0s 0 0 35.78203 0 104 30.00000 35.78203 19.3% - 0s 0 2 35.77503 0 104 30.00000 35.77503 19.3% - 0s * 27 15 10 31.0000000 35.64906 15.0% 29.7 0s * 137 13 9 32.0000000 34.53333 7.92% 28.5 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 60 Explored 197 nodes (6296 simplex iterations) in 0.29 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%