Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:21 2012 Optimize a model with 2288 rows, 462 columns and 7222 nonzeros Presolve removed 1283 rows and 2 columns Presolve time: 0.06s Presolved: 1005 rows, 460 columns, 5236 nonzeros Variable types: 0 continuous, 460 integer (460 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 5.000000e+00, 1345 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 57 21.00000 5.00000 76.2% - 0s H 0 0 15.0000000 5.00000 66.7% - 0s H 0 0 7.0000000 5.00000 28.6% - 0s 0 0 5.00000 0 75 7.00000 5.00000 28.6% - 0s 0 0 5.00000 0 84 7.00000 5.00000 28.6% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 74 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 72 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 66 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 60 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 26 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 53 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 54 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 50 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 47 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 44 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 48 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 48 6.00000 5.00000 16.7% - 2s 0 2 5.00000 0 48 6.00000 5.00000 16.7% - 2s 12 10 5.00000 1 44 6.00000 5.00000 16.7% 64.2 5s Cutting planes: Gomory: 11 Clique: 20 Zero half: 27 Explored 94 nodes (63216 simplex iterations) in 8.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%