Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:15:57 2012 Optimize a model with 481 rows, 451 columns and 1651 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 481 rows, 434 columns, 1634 nonzeros Variable types: 0 continuous, 434 integer (433 binary) Found heuristic solution: objective 85.0000000 Root relaxation: objective 0.000000e+00, 247 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 0 177 85.00000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s H 0 0 49.0000000 0.00000 100% - 0s 0 0 0.23249 0 179 49.00000 0.23249 100% - 0s H 0 0 37.0000000 0.23249 99.4% - 0s 0 0 0.78044 0 182 37.00000 0.78044 97.9% - 0s H 0 0 32.0000000 0.78044 97.6% - 0s 0 0 0.78123 0 184 32.00000 0.78123 97.6% - 0s 0 0 0.78123 0 184 32.00000 0.78123 97.6% - 0s 0 2 0.78151 0 184 32.00000 0.78151 97.6% - 0s H 32 32 19.0000000 1.00000 94.7% 44.5 0s * 154 100 20 18.0000000 1.00000 94.4% 39.2 0s H 321 86 14.0000000 3.92157 72.0% 38.6 0s Cutting planes: Gomory: 4 Zero half: 3 Mod-K: 1 Explored 609 nodes (21201 simplex iterations) in 0.92 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.400000000000e+01, best bound 1.400000000000e+01, gap 0.0%