Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:26:19 2012 Optimize a model with 8223 rows, 1056 columns and 25566 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8253 rows, 1054 columns, 29913 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.538462e+00, 6487 iterations, 0.45 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.53846 0 889 32.00000 3.53846 88.9% - 1s 0 0 6.00000 0 99 32.00000 6.00000 81.2% - 2s H 0 0 27.0000000 6.00000 77.8% - 2s 0 0 6.28571 0 776 27.00000 6.28571 76.7% - 2s H 0 0 16.0000000 6.28571 60.7% - 2s H 0 0 9.0000000 6.28571 30.2% - 2s 0 0 6.30476 0 259 9.00000 6.30476 29.9% - 3s 0 0 7.00000 0 143 9.00000 7.00000 22.2% - 3s 0 0 7.00000 0 192 9.00000 7.00000 22.2% - 4s 0 0 7.00000 0 39 9.00000 7.00000 22.2% - 4s 0 0 7.00000 0 46 9.00000 7.00000 22.2% - 4s 0 0 7.00000 0 18 9.00000 7.00000 22.2% - 4s H 0 0 8.0000000 7.00000 12.5% - 4s 0 0 7.00000 0 31 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 86 8.00000 7.00000 12.5% - 5s 0 0 7.00000 0 81 8.00000 7.00000 12.5% - 5s 0 0 7.00000 0 95 8.00000 7.00000 12.5% - 5s 0 0 7.00000 0 95 8.00000 7.00000 12.5% - 6s 0 2 7.00000 0 95 8.00000 7.00000 12.5% - 6s 93 11 7.00000 28 98 8.00000 7.00000 12.5% 218 10s 1243 13 7.00000 31 124 8.00000 7.00000 12.5% 90.7 15s 2385 5 infeasible 30 8.00000 7.00000 12.5% 85.8 20s Cutting planes: Gomory: 6 Clique: 77 Zero half: 34 Explored 2558 nodes (254958 simplex iterations) in 20.73 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%