Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:28:40 2012 Optimize a model with 519 rows, 476 columns and 1771 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 519 rows, 459 columns, 1754 nonzeros Variable types: 0 continuous, 459 integer (458 binary) Found heuristic solution: objective 109.0000000 Root relaxation: objective 0.000000e+00, 249 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 0 199 109.00000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s H 0 0 75.0000000 0.00000 100% - 0s 0 0 0.47856 0 200 75.00000 0.47856 99.4% - 0s H 0 0 61.0000000 0.47856 99.2% - 0s 0 0 1.00000 0 204 61.00000 1.00000 98.4% - 0s H 0 0 45.0000000 1.00000 97.8% - 0s 0 0 1.00000 0 203 45.00000 1.00000 97.8% - 0s H 0 0 43.0000000 1.00000 97.7% - 0s H 0 0 39.0000000 1.00000 97.4% - 0s 0 2 1.00000 0 201 39.00000 1.00000 97.4% - 0s H 27 21 18.0000000 1.00000 94.4% 57.7 0s Cutting planes: Gomory: 3 Zero half: 2 Explored 1479 nodes (49074 simplex iterations) in 2.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%