Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:43 2012 Optimize a model with 223 rows, 68 columns and 446 nonzeros Presolve removed 62 rows and 2 columns Presolve time: 0.00s Presolved: 161 rows, 66 columns, 361 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 2.833333e+01, 101 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28.33333 0 62 22.00000 28.33333 28.8% - 0s H 0 0 24.0000000 28.33333 18.1% - 0s 0 0 27.62500 0 64 24.00000 27.62500 15.1% - 0s H 0 0 25.0000000 27.62500 10.5% - 0s 0 0 27.13636 0 65 25.00000 27.13636 8.55% - 0s 0 0 26.85714 0 60 25.00000 26.85714 7.43% - 0s 0 0 26.80000 0 64 25.00000 26.80000 7.20% - 0s 0 0 26.77778 0 65 25.00000 26.77778 7.11% - 0s 0 0 26.72759 0 65 25.00000 26.72759 6.91% - 0s 0 0 26.59184 0 64 25.00000 26.59184 6.37% - 0s 0 0 26.48387 0 64 25.00000 26.48387 5.94% - 0s 0 0 26.42169 0 63 25.00000 26.42169 5.69% - 0s 0 0 26.40000 0 63 25.00000 26.40000 5.60% - 0s 0 0 26.40000 0 63 25.00000 26.40000 5.60% - 0s 0 2 26.40000 0 63 25.00000 26.40000 5.60% - 0s Cutting planes: Zero half: 27 Explored 9 nodes (484 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%