Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:08:32 2012 Optimize a model with 2782 rows, 552 columns and 8784 nonzeros Presolve removed 392 rows and 2 columns Presolve time: 0.07s Presolved: 2390 rows, 550 columns, 12101 nonzeros Variable types: 0 continuous, 550 integer (550 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 5.000000e+00, 2379 iterations, 0.26 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 20 23.00000 5.00000 78.3% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 83 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 20 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 169 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 22 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 20 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 20 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 20 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 32 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 33 6.00000 5.00000 16.7% - 2s 0 0 5.00000 0 38 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 44 6.00000 5.00000 16.7% - 3s 0 0 5.00000 0 20 6.00000 5.00000 16.7% - 3s 0 0 5.00000 0 39 6.00000 5.00000 16.7% - 3s 0 0 5.00000 0 50 6.00000 5.00000 16.7% - 3s 0 0 5.00000 0 33 6.00000 5.00000 16.7% - 4s 0 0 5.00000 0 226 6.00000 5.00000 16.7% - 4s 0 0 5.00000 0 226 6.00000 5.00000 16.7% - 4s 0 2 5.00000 0 226 6.00000 5.00000 16.7% - 5s Cutting planes: Gomory: 12 Clique: 4 Zero half: 39 Explored 5 nodes (41157 simplex iterations) in 6.23 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%