Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:15 2012 Optimize a model with 484 rows, 44 columns and 968 nonzeros Presolve removed 331 rows and 0 columns Presolve time: 0.01s Presolved: 153 rows, 44 columns, 834 nonzeros Variable types: 0 continuous, 44 integer (44 binary) Found heuristic solution: objective 5.0000000 Root relaxation: objective 8.029412e+00, 76 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8.02941 0 35 5.00000 8.02941 60.6% - 0s 0 0 7.81267 0 41 5.00000 7.81267 56.3% - 0s H 0 0 6.0000000 7.81267 30.2% - 0s 0 0 7.71560 0 41 6.00000 7.71560 28.6% - 0s 0 0 7.67834 0 38 6.00000 7.67834 28.0% - 0s 0 0 7.64250 0 42 6.00000 7.64250 27.4% - 0s 0 0 7.61840 0 40 6.00000 7.61840 27.0% - 0s 0 0 7.61675 0 43 6.00000 7.61675 26.9% - 0s 0 2 7.61666 0 43 6.00000 7.61666 26.9% - 0s Cutting planes: Gomory: 1 Clique: 14 Zero half: 9 Explored 14 nodes (571 simplex iterations) in 0.06 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%