Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:21 2012 Optimize a model with 748 rows, 54 columns and 1496 nonzeros Presolve removed 524 rows and 0 columns Presolve time: 0.01s Presolved: 224 rows, 54 columns, 1355 nonzeros Variable types: 0 continuous, 54 integer (54 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 9.074579e+00, 144 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 9.07458 0 50 7.00000 9.07458 29.6% - 0s H 0 0 8.0000000 9.07458 13.4% - 0s 0 0 cutoff 0 8.00000 8.99999 12.5% - 0s Cutting planes: Gomory: 2 Clique: 19 Zero half: 53 Explored 0 nodes (156 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%