Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:41:57 2012 Optimize a model with 311 rows, 329 columns and 1104 nonzeros Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 311 rows, 307 columns, 1082 nonzeros Variable types: 0 continuous, 307 integer (306 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 0.000000e+00, 208 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 0 124 50.00000 0.00000 100% - 0s H 0 0 48.0000000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s 0 0 0.12408 0 126 28.00000 0.12408 100% - 0s H 0 0 24.0000000 0.12408 99.5% - 0s H 0 0 16.0000000 0.12408 99.2% - 0s 0 0 0.73847 0 138 16.00000 0.73847 95.4% - 0s H 0 0 14.0000000 0.73847 94.7% - 0s 0 0 0.73847 0 141 14.00000 0.73847 94.7% - 0s 0 0 0.73847 0 131 14.00000 0.73847 94.7% - 0s H 0 0 13.0000000 0.73847 94.3% - 0s H 0 0 9.0000000 0.73847 91.8% - 0s 0 2 0.73876 0 131 9.00000 0.73876 91.8% - 0s * 38 23 30 5.0000000 1.00000 80.0% 33.7 0s * 130 24 13 4.0000000 1.00000 75.0% 29.9 0s Cutting planes: Gomory: 4 Zero half: 4 Explored 204 nodes (8051 simplex iterations) in 0.24 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%