Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:54:16 2012 Optimize a model with 780 rows, 119 columns and 1560 nonzeros Presolve removed 314 rows and 0 columns Presolve time: 0.00s Presolved: 466 rows, 119 columns, 1232 nonzeros Variable types: 0 continuous, 119 integer (119 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.906354e+01, 350 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.06354 0 119 25.00000 39.06354 56.3% - 0s 0 0 38.82598 0 119 25.00000 38.82598 55.3% - 0s 0 0 38.75721 0 119 25.00000 38.75721 55.0% - 0s H 0 0 26.0000000 38.75721 49.1% - 0s 0 0 38.68663 0 119 26.00000 38.68663 48.8% - 0s H 0 0 27.0000000 38.68663 43.3% - 0s 0 0 38.36384 0 118 27.00000 38.36384 42.1% - 0s 0 0 38.06071 0 119 27.00000 38.06071 41.0% - 0s 0 0 37.94736 0 117 27.00000 37.94736 40.5% - 0s 0 0 37.86346 0 119 27.00000 37.86346 40.2% - 0s 0 0 37.74653 0 118 27.00000 37.74653 39.8% - 0s 0 0 37.51755 0 116 27.00000 37.51755 39.0% - 0s 0 0 37.38915 0 118 27.00000 37.38915 38.5% - 0s H 0 0 28.0000000 37.38915 33.5% - 0s 0 0 37.31818 0 116 28.00000 37.31818 33.3% - 0s 0 0 37.24688 0 119 28.00000 37.24688 33.0% - 0s 0 0 37.24433 0 119 28.00000 37.24433 33.0% - 0s 0 0 37.24433 0 119 28.00000 37.24433 33.0% - 0s H 0 0 30.0000000 37.24433 24.1% - 0s H 0 0 31.0000000 37.24433 20.1% - 0s 0 2 37.24427 0 119 31.00000 37.24427 20.1% - 0s Cutting planes: Clique: 2 Zero half: 47 Explored 744 nodes (27802 simplex iterations) in 1.18 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%