Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:19 2012 Optimize a model with 675 rows, 51 columns and 1350 nonzeros Presolve removed 481 rows and 0 columns Presolve time: 0.01s Presolved: 194 rows, 51 columns, 1134 nonzeros Variable types: 0 continuous, 51 integer (51 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 8.902341e+00, 108 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8.90234 0 44 6.00000 8.90234 48.4% - 0s 0 0 8.58307 0 41 6.00000 8.58307 43.1% - 0s 0 0 8.48091 0 47 6.00000 8.48091 41.3% - 0s H 0 0 7.0000000 8.48091 21.2% - 0s 0 0 8.42276 0 47 7.00000 8.42276 20.3% - 0s 0 0 8.41936 0 47 7.00000 8.41936 20.3% - 0s 0 2 8.41586 0 47 7.00000 8.41586 20.2% - 0s Cutting planes: Clique: 19 Zero half: 9 Explored 7 nodes (384 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%