Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:53 2012 Optimize a model with 2617 rows, 506 columns and 8248 nonzeros Presolve removed 804 rows and 2 columns Presolve time: 0.06s Presolved: 1813 rows, 504 columns, 9156 nonzeros Variable types: 0 continuous, 504 integer (504 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 5.000000e+00, 1298 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 98 22.00000 5.00000 77.3% - 0s H 0 0 21.0000000 5.00000 76.2% - 0s H 0 0 11.0000000 5.00000 54.5% - 0s 0 0 5.00000 0 108 11.00000 5.00000 54.5% - 0s H 0 0 8.0000000 5.00000 37.5% - 0s H 0 0 7.0000000 5.00000 28.6% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 94 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 51 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 37 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 57 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 39 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 48 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 36 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 16 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 45 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 29 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 58 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 49 6.00000 5.00000 16.7% - 2s 0 2 5.00000 0 49 6.00000 5.00000 16.7% - 3s 9 8 5.00000 1 40 6.00000 5.00000 16.7% 53.0 5s Cutting planes: Gomory: 1 Clique: 2 MIR: 1 Zero half: 4 Explored 26 nodes (44134 simplex iterations) in 7.66 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%