Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:06:15 2012 Optimize a model with 7594 rows, 992 columns and 23620 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.09s Presolved: 7592 rows, 990 columns, 27083 nonzeros Variable types: 0 continuous, 990 integer (990 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 3.450000e+00, 5762 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.45000 0 908 31.00000 3.45000 88.9% - 0s 0 0 6.00000 0 147 31.00000 6.00000 80.6% - 1s H 0 0 27.0000000 6.00000 77.8% - 1s H 0 0 11.0000000 6.00000 45.5% - 1s 0 0 6.00000 0 165 11.00000 6.00000 45.5% - 2s H 0 0 10.0000000 6.00000 40.0% - 2s 0 0 6.00127 0 180 10.00000 6.00127 40.0% - 2s H 0 0 9.0000000 6.00127 33.3% - 2s 0 0 6.08333 0 251 9.00000 6.08333 32.4% - 3s 0 0 6.08333 0 127 9.00000 6.08333 32.4% - 4s 0 0 6.11250 0 174 9.00000 6.11250 32.1% - 5s 0 0 6.27941 0 298 9.00000 6.27941 30.2% - 5s 0 0 6.30000 0 231 9.00000 6.30000 30.0% - 5s 0 0 6.44318 0 270 9.00000 6.44318 28.4% - 5s 0 0 6.44318 0 340 9.00000 6.44318 28.4% - 5s 0 0 6.44318 0 151 9.00000 6.44318 28.4% - 6s 0 0 6.44543 0 343 9.00000 6.44543 28.4% - 6s H 0 0 8.0000000 6.44543 19.4% - 6s 0 0 6.44543 0 376 8.00000 6.44543 19.4% - 6s 0 0 6.44678 0 370 8.00000 6.44678 19.4% - 7s 0 0 6.44678 0 369 8.00000 6.44678 19.4% - 7s 0 0 6.44678 0 360 8.00000 6.44678 19.4% - 7s 0 0 6.44678 0 361 8.00000 6.44678 19.4% - 7s 0 0 6.44678 0 354 8.00000 6.44678 19.4% - 8s 0 0 6.44678 0 354 8.00000 6.44678 19.4% - 8s 0 0 6.44678 0 358 8.00000 6.44678 19.4% - 8s 0 0 6.44678 0 356 8.00000 6.44678 19.4% - 8s 0 0 6.44678 0 352 8.00000 6.44678 19.4% - 9s 0 0 6.44678 0 355 8.00000 6.44678 19.4% - 9s 0 0 7.00000 0 104 8.00000 7.00000 12.5% - 9s 0 0 7.00000 0 56 8.00000 7.00000 12.5% - 9s 0 2 7.00000 0 56 8.00000 7.00000 12.5% - 10s 320 9 7.00000 26 101 8.00000 7.00000 12.5% 122 15s Cutting planes: Gomory: 1 Clique: 120 Zero half: 46 Explored 440 nodes (98446 simplex iterations) in 15.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%