Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:08:54 2012 Optimize a model with 2782 rows, 552 columns and 8784 nonzeros Presolve removed 404 rows and 2 columns Presolve time: 0.07s Presolved: 2401 rows, 550 columns, 12582 nonzeros Variable types: 0 continuous, 550 integer (550 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 5.000000e+00, 2305 iterations, 0.25 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 57 23.00000 5.00000 78.3% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 69 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 59 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 67 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 71 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 97 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 41 6.00000 5.00000 16.7% - 2s 0 2 5.00000 0 41 6.00000 5.00000 16.7% - 2s 9 8 5.00000 1 89 6.00000 5.00000 16.7% 124 5s Cutting planes: Gomory: 7 Clique: 1 Zero half: 6 Explored 45 nodes (31774 simplex iterations) in 5.74 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%