Gurobi 5.0.1 (linux64) logging started Mon Nov 19 10:04:00 2012 Optimize a model with 7116 rows, 169 columns and 14232 nonzeros Presolve removed 5137 rows and 0 columns Presolve time: 0.31s Presolved: 1979 rows, 169 columns, 14490 nonzeros Variable types: 0 continuous, 169 integer (169 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 2.049947e+01, 956 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 20.49947 0 169 7.00000 20.49947 193% - 0s H 0 0 8.0000000 20.49947 156% - 0s 0 0 20.05275 0 169 8.00000 20.05275 151% - 0s 0 0 19.87151 0 169 8.00000 19.87151 148% - 1s 0 0 19.81881 0 168 8.00000 19.81881 148% - 1s H 0 0 9.0000000 19.81881 120% - 1s 0 0 19.76625 0 168 9.00000 19.76625 120% - 1s 0 0 19.71600 0 169 9.00000 19.71600 119% - 1s 0 0 19.67585 0 169 9.00000 19.67585 119% - 1s 0 0 19.64524 0 169 9.00000 19.64524 118% - 2s 0 0 19.61753 0 169 9.00000 19.61753 118% - 2s 0 0 19.58387 0 169 9.00000 19.58387 118% - 2s H 0 0 10.0000000 19.58387 95.8% - 2s 0 0 19.54834 0 169 10.00000 19.54834 95.5% - 2s 0 0 19.54236 0 169 10.00000 19.54236 95.4% - 3s 0 0 19.53400 0 169 10.00000 19.53400 95.3% - 3s 0 0 19.53066 0 169 10.00000 19.53066 95.3% - 3s 0 0 19.52839 0 169 10.00000 19.52839 95.3% - 3s 0 0 19.52689 0 169 10.00000 19.52689 95.3% - 4s 0 0 19.52568 0 169 10.00000 19.52568 95.3% - 4s 0 0 19.52558 0 169 10.00000 19.52558 95.3% - 4s 0 2 19.52463 0 169 10.00000 19.52463 95.2% - 5s 357 250 15.08804 11 81 10.00000 18.33070 83.3% 94.2 10s 601 397 13.30567 28 169 10.00000 17.26794 72.7% 92.6 20s 621 412 14.24281 14 71 10.00000 17.26794 72.7% 102 25s 713 474 12.20132 60 60 10.00000 15.83357 58.3% 142 30s 1248 530 11.58607 41 53 10.00000 15.09999 51.0% 108 35s 1596 552 12.22531 37 64 10.00000 14.82736 48.3% 94.9 40s 1874 537 11.00000 26 38 10.00000 14.42924 44.3% 87.6 45s 2484 632 13.21235 36 65 10.00000 13.87185 38.7% 78.2 50s 3121 647 11.92308 17 32 10.00000 13.04623 30.5% 73.1 55s 3693 450 cutoff 20 10.00000 12.20766 22.1% 69.3 60s Cutting planes: Clique: 76 Explored 4355 nodes (274708 simplex iterations) in 62.64 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%