Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:08:05 2012 Optimize a model with 2617 rows, 506 columns and 8248 nonzeros Presolve removed 816 rows and 2 columns Presolve time: 0.06s Presolved: 1823 rows, 504 columns, 9580 nonzeros Variable types: 0 continuous, 504 integer (504 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 5.000000e+00, 1930 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 37 22.00000 5.00000 77.3% - 0s H 0 0 12.0000000 5.00000 58.3% - 0s H 0 0 8.0000000 5.00000 37.5% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 121 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 38 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 37 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 51 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 35 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 44 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 55 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 51 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 44 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 53 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 53 6.00000 5.00000 16.7% - 2s 0 2 5.00000 0 45 6.00000 5.00000 16.7% - 2s 11 9 5.00000 1 65 6.00000 5.00000 16.7% 61.0 5s Cutting planes: Gomory: 1 Clique: 7 Zero half: 16 Explored 27 nodes (39498 simplex iterations) in 6.04 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%