Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:36 2012 Optimize a model with 967 rows, 63 columns and 1934 nonzeros Presolve removed 663 rows and 0 columns Presolve time: 0.01s Presolved: 304 rows, 63 columns, 1775 nonzeros Variable types: 0 continuous, 63 integer (63 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.058630e+01, 150 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.58630 0 59 6.00000 10.58630 76.4% - 0s H 0 0 7.0000000 10.58630 51.2% - 0s H 0 0 8.0000000 10.58630 32.3% - 0s 0 0 10.40781 0 63 8.00000 10.40781 30.1% - 0s 0 0 10.35687 0 60 8.00000 10.35687 29.5% - 0s 0 0 10.34296 0 62 8.00000 10.34296 29.3% - 0s 0 0 10.32462 0 63 8.00000 10.32462 29.1% - 0s 0 0 10.32168 0 63 8.00000 10.32168 29.0% - 0s 0 2 10.31985 0 63 8.00000 10.31985 29.0% - 0s Cutting planes: Gomory: 3 Clique: 14 Zero half: 11 Explored 26 nodes (1327 simplex iterations) in 0.14 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%