Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:41 2012 Optimize a model with 644 rows, 114 columns and 1288 nonzeros Presolve removed 242 rows and 0 columns Presolve time: 0.00s Presolved: 402 rows, 114 columns, 1028 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 3.939527e+01, 306 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.39527 0 111 30.00000 39.39527 31.3% - 0s 0 0 39.08443 0 112 30.00000 39.08443 30.3% - 0s 0 0 38.80622 0 111 30.00000 38.80622 29.4% - 0s 0 0 38.65463 0 113 30.00000 38.65463 28.8% - 0s 0 0 38.48682 0 111 30.00000 38.48682 28.3% - 0s 0 0 38.38736 0 113 30.00000 38.38736 28.0% - 0s 0 0 38.28041 0 113 30.00000 38.28041 27.6% - 0s 0 0 38.19379 0 114 30.00000 38.19379 27.3% - 0s 0 0 38.04372 0 110 30.00000 38.04372 26.8% - 0s 0 0 38.00135 0 111 30.00000 38.00135 26.7% - 0s 0 0 37.92087 0 112 30.00000 37.92087 26.4% - 0s H 0 0 31.0000000 37.92087 22.3% - 0s 0 0 37.82918 0 111 31.00000 37.82918 22.0% - 0s 0 0 37.66212 0 111 31.00000 37.66212 21.5% - 0s 0 0 37.58751 0 111 31.00000 37.58751 21.3% - 0s 0 0 37.54438 0 113 31.00000 37.54438 21.1% - 0s 0 0 37.51099 0 111 31.00000 37.51099 21.0% - 0s 0 0 37.50728 0 113 31.00000 37.50728 21.0% - 0s 0 0 37.50728 0 112 31.00000 37.50728 21.0% - 0s H 0 0 32.0000000 37.50728 17.2% - 0s 0 2 37.50597 0 112 32.00000 37.50597 17.2% - 0s * 18 10 5 33.0000000 37.42437 13.4% 46.7 0s Cutting planes: Clique: 3 Zero half: 55 Explored 414 nodes (13187 simplex iterations) in 0.56 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%