Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:15 2012 Optimize a model with 481 rows, 44 columns and 962 nonzeros Presolve removed 339 rows and 0 columns Presolve time: 0.01s Presolved: 142 rows, 44 columns, 758 nonzeros Variable types: 0 continuous, 44 integer (44 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 8.503575e+00, 78 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8.50357 0 41 6.00000 8.50357 41.7% - 0s 0 0 8.18422 0 42 6.00000 8.18422 36.4% - 0s H 0 0 7.0000000 8.18422 16.9% - 0s 0 0 8.12558 0 41 7.00000 8.12558 16.1% - 0s 0 0 8.11319 0 42 7.00000 8.11319 15.9% - 0s 0 0 8.10058 0 40 7.00000 8.10058 15.7% - 0s 0 0 8.09943 0 42 7.00000 8.09943 15.7% - 0s 0 2 8.09920 0 42 7.00000 8.09920 15.7% - 0s Cutting planes: Gomory: 4 Clique: 9 Zero half: 8 Explored 3 nodes (258 simplex iterations) in 0.04 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%