Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:01 2012 Optimize a model with 641 rows, 112 columns and 1282 nonzeros Presolve removed 235 rows and 0 columns Presolve time: 0.00s Presolved: 406 rows, 112 columns, 1021 nonzeros Variable types: 0 continuous, 112 integer (112 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.871053e+01, 245 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.71053 0 108 24.00000 38.71053 61.3% - 0s H 0 0 25.0000000 38.71053 54.8% - 0s 0 0 37.74188 0 110 25.00000 37.74188 51.0% - 0s H 0 0 26.0000000 37.74188 45.2% - 0s 0 0 37.38615 0 109 26.00000 37.38615 43.8% - 0s 0 0 37.17345 0 110 26.00000 37.17345 43.0% - 0s 0 0 36.98111 0 111 26.00000 36.98111 42.2% - 0s 0 0 36.90950 0 111 26.00000 36.90950 42.0% - 0s H 0 0 28.0000000 36.90950 31.8% - 0s 0 0 36.75735 0 109 28.00000 36.75735 31.3% - 0s 0 0 36.74347 0 110 28.00000 36.74347 31.2% - 0s H 0 0 30.0000000 36.74347 22.5% - 0s 0 0 36.72294 0 110 30.00000 36.72294 22.4% - 0s 0 0 36.70305 0 109 30.00000 36.70305 22.3% - 0s 0 0 36.66833 0 111 30.00000 36.66833 22.2% - 0s 0 0 36.63174 0 110 30.00000 36.63174 22.1% - 0s 0 0 36.61175 0 110 30.00000 36.61175 22.0% - 0s 0 0 36.61175 0 109 30.00000 36.61175 22.0% - 0s 0 2 36.61117 0 109 30.00000 36.61117 22.0% - 0s H 165 47 31.0000000 35.00000 12.9% 33.8 0s Cutting planes: Gomory: 2 Clique: 3 Zero half: 59 Explored 726 nodes (20194 simplex iterations) in 0.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%