Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:45 2012 Optimize a model with 295 rows, 73 columns and 590 nonzeros Presolve removed 108 rows and 0 columns Presolve time: 0.00s Presolved: 187 rows, 73 columns, 460 nonzeros Variable types: 0 continuous, 73 integer (73 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 2.716667e+01, 126 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27.16667 0 64 23.00000 27.16667 18.1% - 0s 0 0 26.73333 0 68 23.00000 26.73333 16.2% - 0s 0 0 26.41791 0 68 23.00000 26.41791 14.9% - 0s 0 0 26.00000 0 67 23.00000 26.00000 13.0% - 0s 0 0 26.00000 0 66 23.00000 26.00000 13.0% - 0s 0 0 26.00000 0 64 23.00000 26.00000 13.0% - 0s H 0 0 24.0000000 26.00000 8.33% - 0s 0 0 26.00000 0 44 24.00000 26.00000 8.33% - 0s 0 0 26.00000 0 57 24.00000 26.00000 8.33% - 0s 0 0 26.00000 0 56 24.00000 26.00000 8.33% - 0s 0 2 26.00000 0 56 24.00000 26.00000 8.33% - 0s * 17 2 7 25.0000000 25.40000 1.60% 18.8 0s Cutting planes: Gomory: 1 Zero half: 16 Explored 18 nodes (772 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0%