Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:21:36 2012 Optimize a model with 491 rows, 459 columns and 1684 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 491 rows, 441 columns, 1666 nonzeros Variable types: 0 continuous, 441 integer (440 binary) Found heuristic solution: objective 102.0000000 Root relaxation: objective 0.000000e+00, 242 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 0 191 102.00000 0.00000 100% - 0s H 0 0 80.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s H 0 0 58.0000000 0.00000 100% - 0s 0 0 0.42701 0 192 58.00000 0.42701 99.3% - 0s H 0 0 55.0000000 0.42701 99.2% - 0s 0 0 1.00000 0 195 55.00000 1.00000 98.2% - 0s H 0 0 54.0000000 1.00000 98.1% - 0s 0 0 1.00000 0 194 54.00000 1.00000 98.1% - 0s H 0 0 48.0000000 1.00000 97.9% - 0s 0 0 1.00000 0 195 48.00000 1.00000 97.9% - 0s 0 0 1.00000 0 191 48.00000 1.00000 97.9% - 0s H 0 0 44.0000000 1.00000 97.7% - 0s H 0 0 40.0000000 1.00000 97.5% - 0s 0 2 1.00000 0 191 40.00000 1.00000 97.5% - 0s H 27 27 17.0000000 3.14815 81.5% 48.8 0s * 31 21 18 14.0000000 3.14815 77.5% 48.4 0s Cutting planes: Gomory: 1 Explored 298 nodes (12238 simplex iterations) in 0.54 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%