Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:06:49 2012 Optimize a model with 1880 rows, 420 columns and 5980 nonzeros Presolve removed 1060 rows and 0 columns Presolve time: 0.03s Presolved: 820 rows, 420 columns, 4200 nonzeros Variable types: 0 continuous, 420 integer (420 binary) Found heuristic solution: objective 12.0000000 Root relaxation: objective 5.000000e+00, 1265 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 26 12.00000 5.00000 58.3% - 0s H 0 0 7.0000000 5.00000 28.6% - 0s 0 0 5.00000 0 72 7.00000 5.00000 28.6% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 60 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 76 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 46 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 51 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 29 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 46 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 75 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 51 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 49 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 57 6.00000 5.00000 16.7% - 1s 0 2 5.00000 0 44 6.00000 5.00000 16.7% - 1s Cutting planes: Gomory: 2 Clique: 3 Zero half: 7 Explored 37 nodes (46240 simplex iterations) in 4.40 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%