Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:12:20 2012 Optimize a model with 441 rows, 429 columns and 1529 nonzeros Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 441 rows, 402 columns, 1502 nonzeros Variable types: 0 continuous, 402 integer (401 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 0.000000e+00, 257 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 172 75.00000 0.00000 100% - 0s H 0 0 49.0000000 0.00000 100% - 0s H 0 0 47.0000000 0.00000 100% - 0s 0 0 0.37799 0 173 47.00000 0.37799 99.2% - 0s H 0 0 42.0000000 0.37799 99.1% - 0s 0 0 1.00000 0 176 42.00000 1.00000 97.6% - 0s H 0 0 37.0000000 1.00000 97.3% - 0s 0 0 1.00000 0 177 37.00000 1.00000 97.3% - 0s 0 0 1.00000 0 174 37.00000 1.00000 97.3% - 0s H 0 0 35.0000000 1.00000 97.1% - 0s H 0 0 33.0000000 1.00000 97.0% - 0s 0 2 1.00000 0 174 33.00000 1.00000 97.0% - 0s H 27 25 11.0000000 1.11721 89.8% 35.1 0s * 40 19 27 10.0000000 1.11721 88.8% 31.3 0s H 58 16 9.0000000 2.88427 68.0% 29.3 0s Cutting planes: Gomory: 3 Mod-K: 1 Explored 129 nodes (5156 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%