Gurobi 5.0.1 (linux64) logging started Mon Nov 19 10:43:03 2012 Optimize a model with 7506 rows, 172 columns and 15012 nonzeros Presolve removed 5440 rows and 0 columns Presolve time: 0.35s Presolved: 2066 rows, 172 columns, 15451 nonzeros Variable types: 0 continuous, 172 integer (172 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 2.049207e+01, 951 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 20.49207 0 171 8.00000 20.49207 156% - 0s H 0 0 9.0000000 20.49207 128% - 0s 0 0 20.03881 0 169 9.00000 20.03881 123% - 0s 0 0 19.89158 0 172 9.00000 19.89158 121% - 1s 0 0 19.79027 0 172 9.00000 19.79027 120% - 1s 0 0 19.74683 0 172 9.00000 19.74683 119% - 1s H 0 0 10.0000000 19.74683 97.5% - 1s 0 0 19.71223 0 172 10.00000 19.71223 97.1% - 1s 0 0 19.68425 0 172 10.00000 19.68425 96.8% - 2s 0 0 19.67049 0 172 10.00000 19.67049 96.7% - 2s 0 0 19.65739 0 172 10.00000 19.65739 96.6% - 2s 0 0 19.64038 0 172 10.00000 19.64038 96.4% - 2s 0 0 19.63047 0 172 10.00000 19.63047 96.3% - 2s 0 0 19.62519 0 172 10.00000 19.62519 96.3% - 3s 0 0 19.62212 0 172 10.00000 19.62212 96.2% - 3s 0 0 19.62169 0 172 10.00000 19.62169 96.2% - 3s 0 0 19.62146 0 172 10.00000 19.62146 96.2% - 3s 0 0 19.62118 0 172 10.00000 19.62118 96.2% - 4s 0 2 19.62112 0 172 10.00000 19.62112 96.2% - 5s 383 283 11.61057 35 62 10.00000 18.68431 86.8% 90.1 10s 601 417 13.65380 19 172 10.00000 17.76329 77.6% 88.6 18s 610 423 12.93349 20 172 10.00000 17.76329 77.6% 87.3 20s 634 441 14.13219 25 78 10.00000 17.76329 77.6% 105 25s 725 502 14.79361 71 110 10.00000 15.91032 59.1% 141 30s 1214 502 11.41414 26 41 10.00000 15.01125 50.1% 115 35s 1524 511 14.50098 25 81 10.00000 14.63244 46.3% 101 40s 1788 549 11.21113 63 55 10.00000 14.51777 45.2% 92.8 45s 2172 570 11.12321 30 43 10.00000 14.04472 40.4% 85.4 50s 2742 659 12.12626 46 58 10.00000 13.30806 33.1% 79.1 55s 3310 591 11.91157 61 59 10.00000 12.61368 26.1% 74.6 60s 4179 143 11.33548 31 36 10.00000 11.52915 15.3% 65.3 65s Cutting planes: Clique: 65 Explored 4363 nodes (277365 simplex iterations) in 65.39 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%