Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:34:23 2012 Optimize a model with 281 rows, 302 columns and 1002 nonzeros Presolve removed 0 rows and 31 columns Presolve time: 0.00s Presolved: 281 rows, 271 columns, 971 nonzeros Variable types: 0 continuous, 271 integer (270 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 0.000000e+00, 192 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 0 115 48.00000 0.00000 100% - 0s H 0 0 43.0000000 0.00000 100% - 0s H 0 0 35.0000000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.18579 0 116 30.00000 0.18579 99.4% - 0s H 0 0 24.0000000 0.18579 99.2% - 0s 0 0 1.00000 0 121 24.00000 1.00000 95.8% - 0s H 0 0 20.0000000 1.00000 95.0% - 0s 0 0 1.00000 0 118 20.00000 1.00000 95.0% - 0s H 0 0 11.0000000 1.00000 90.9% - 0s 0 0 1.00000 0 124 11.00000 1.00000 90.9% - 0s 0 0 1.00000 0 117 11.00000 1.00000 90.9% - 0s 0 2 1.00000 0 117 11.00000 1.00000 90.9% - 0s H 27 24 9.0000000 1.00000 88.9% 36.4 0s H 54 12 5.0000000 1.00000 80.0% 24.1 0s H 136 20 4.0000000 1.00000 75.0% 29.3 0s Cutting planes: Gomory: 3 Zero half: 16 Explored 417 nodes (12689 simplex iterations) in 0.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%