Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:43 2012 Optimize a model with 230 rows, 69 columns and 460 nonzeros Presolve removed 84 rows and 5 columns Presolve time: 0.00s Presolved: 146 rows, 64 columns, 340 nonzeros Variable types: 0 continuous, 64 integer (64 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 2.900000e+01, 82 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 29.00000 0 52 23.00000 29.00000 26.1% - 0s H 0 0 24.0000000 29.00000 20.8% - 0s 0 0 28.39657 0 61 24.00000 28.39657 18.3% - 0s H 0 0 26.0000000 28.39657 9.22% - 0s 0 0 27.62500 0 64 26.00000 27.62500 6.25% - 0s 0 0 27.39286 0 62 26.00000 27.39286 5.36% - 0s 0 0 27.30000 0 63 26.00000 27.30000 5.00% - 0s 0 0 27.24280 0 61 26.00000 27.24280 4.78% - 0s 0 0 27.22222 0 59 26.00000 27.22222 4.70% - 0s 0 0 27.18182 0 60 26.00000 27.18182 4.55% - 0s 0 0 27.13889 0 61 26.00000 27.13889 4.38% - 0s 0 0 27.00000 0 62 26.00000 27.00000 3.85% - 0s 0 0 27.00000 0 51 26.00000 27.00000 3.85% - 0s 0 0 27.00000 0 50 26.00000 27.00000 3.85% - 0s 0 0 cutoff 0 26.00000 26.99997 3.85% - 0s Cutting planes: Zero half: 56 Explored 0 nodes (390 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%