Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012 Optimize a model with 212 rows, 64 columns and 424 nonzeros Presolve removed 53 rows and 1 columns Presolve time: 0.00s Presolved: 159 rows, 63 columns, 354 nonzeros Variable types: 0 continuous, 63 integer (63 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 2.700000e+01, 81 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27.00000 0 55 22.00000 27.00000 22.7% - 0s H 0 0 23.0000000 27.00000 17.4% - 0s 0 0 26.25000 0 56 23.00000 26.25000 14.1% - 0s 0 0 26.00000 0 56 23.00000 26.00000 13.0% - 0s H 0 0 24.0000000 26.00000 8.33% - 0s 0 0 25.85714 0 61 24.00000 25.85714 7.74% - 0s 0 0 25.72222 0 60 24.00000 25.72222 7.18% - 0s 0 0 25.62712 0 62 24.00000 25.62712 6.78% - 0s 0 0 25.61062 0 63 24.00000 25.61062 6.71% - 0s 0 0 25.54386 0 63 24.00000 25.54386 6.43% - 0s 0 0 25.53030 0 63 24.00000 25.53030 6.38% - 0s 0 0 25.53030 0 63 24.00000 25.53030 6.38% - 0s 0 2 25.53030 0 63 24.00000 25.53030 6.38% - 0s Cutting planes: Zero half: 23 Explored 10 nodes (481 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%