Gurobi 5.0.1 (linux64) logging started Mon Nov 19 08:30:22 2012 Optimize a model with 6122 rows, 157 columns and 12244 nonzeros Presolve removed 4428 rows and 0 columns Presolve time: 0.25s Presolved: 1694 rows, 157 columns, 12232 nonzeros Variable types: 0 continuous, 157 integer (157 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.958833e+01, 809 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19.58833 0 157 7.00000 19.58833 180% - 0s H 0 0 9.0000000 19.58833 118% - 0s 0 0 19.23098 0 157 9.00000 19.23098 114% - 0s 0 0 19.06269 0 157 9.00000 19.06269 112% - 0s 0 0 19.03558 0 157 9.00000 19.03558 112% - 1s 0 0 18.99313 0 156 9.00000 18.99313 111% - 1s 0 0 18.95498 0 156 9.00000 18.95498 111% - 1s 0 0 18.93452 0 157 9.00000 18.93452 110% - 1s 0 0 18.92617 0 157 9.00000 18.92617 110% - 1s 0 0 18.91081 0 157 9.00000 18.91081 110% - 2s H 0 0 10.0000000 18.91081 89.1% - 2s 0 0 18.90383 0 157 10.00000 18.90383 89.0% - 2s 0 0 18.88577 0 157 10.00000 18.88577 88.9% - 2s 0 0 18.87631 0 157 10.00000 18.87631 88.8% - 2s 0 0 18.87552 0 157 10.00000 18.87552 88.8% - 2s 0 0 18.87099 0 157 10.00000 18.87099 88.7% - 3s 0 0 18.86835 0 157 10.00000 18.86835 88.7% - 3s 0 0 18.86373 0 157 10.00000 18.86373 88.6% - 3s 0 0 18.86257 0 157 10.00000 18.86257 88.6% - 3s 0 0 18.86167 0 157 10.00000 18.86167 88.6% - 4s 0 0 18.86017 0 157 10.00000 18.86017 88.6% - 4s 0 0 18.85961 0 157 10.00000 18.85961 88.6% - 4s 0 0 18.85960 0 157 10.00000 18.85960 88.6% - 4s 0 2 18.85737 0 157 10.00000 18.85737 88.6% - 5s 435 277 12.90712 19 72 10.00000 17.23058 72.3% 85.8 10s 601 378 13.77322 11 157 10.00000 16.31453 63.1% 84.2 15s 628 398 14.82395 20 83 10.00000 16.31453 63.1% 95.7 20s 932 439 13.08321 31 68 10.00000 15.09128 50.9% 111 25s 1534 445 11.85348 35 43 10.00000 14.11405 41.1% 85.6 30s 1783 383 11.03244 24 38 10.00000 13.72657 37.3% 81.1 35s 2406 388 11.03881 30 37 10.00000 12.64621 26.5% 74.4 40s Cutting planes: Clique: 64 Explored 3075 nodes (200836 simplex iterations) in 42.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%