Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:15 2012 Optimize a model with 503 rows, 45 columns and 1006 nonzeros Presolve removed 351 rows and 0 columns Presolve time: 0.01s Presolved: 152 rows, 45 columns, 816 nonzeros Variable types: 0 continuous, 45 integer (45 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 8.330000e+00, 68 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8.33000 0 38 6.00000 8.33000 38.8% - 0s H 0 0 7.0000000 8.33000 19.0% - 0s 0 0 8.02285 0 39 7.00000 8.02285 14.6% - 0s 0 0 cutoff 0 7.00000 7.99999 14.3% - 0s Cutting planes: Gomory: 3 Clique: 9 Zero half: 6 Explored 0 nodes (119 simplex iterations) in 0.02 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%