Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:35:30 2012 Optimize a model with 281 rows, 305 columns and 1005 nonzeros Presolve removed 0 rows and 30 columns Presolve time: 0.00s Presolved: 281 rows, 275 columns, 975 nonzeros Variable types: 0 continuous, 275 integer (274 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 0.000000e+00, 194 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 0 107 45.00000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 0 0.05682 0 109 22.00000 0.05682 100% - 0s H 0 0 16.0000000 0.05682 100% - 0s 0 0 0.66667 0 113 16.00000 0.66667 95.8% - 0s H 0 0 5.0000000 0.66667 86.7% - 0s 0 0 0.66667 0 115 5.00000 0.66667 86.7% - 0s 0 0 0.66667 0 113 5.00000 0.66667 86.7% - 0s H 0 0 3.0000000 0.66667 77.8% - 0s 0 2 0.66667 0 113 3.00000 0.66667 77.8% - 0s Cutting planes: Gomory: 3 Explored 18 nodes (1416 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%