Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:44 2012 Optimize a model with 263 rows, 71 columns and 526 nonzeros Presolve removed 83 rows and 1 columns Presolve time: 0.00s Presolved: 180 rows, 70 columns, 415 nonzeros Variable types: 0 continuous, 70 integer (70 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 2.800000e+01, 102 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28.00000 0 59 23.00000 28.00000 21.7% - 0s H 0 0 24.0000000 28.00000 16.7% - 0s H 0 0 25.0000000 28.00000 12.0% - 0s 0 0 27.44828 0 66 25.00000 27.44828 9.79% - 0s 0 0 27.41592 0 68 25.00000 27.41592 9.66% - 0s 0 0 27.24399 0 68 25.00000 27.24399 8.98% - 0s 0 0 27.18182 0 65 25.00000 27.18182 8.73% - 0s 0 0 26.96733 0 66 25.00000 26.96733 7.87% - 0s 0 0 26.88235 0 66 25.00000 26.88235 7.53% - 0s 0 0 26.80460 0 67 25.00000 26.80460 7.22% - 0s 0 0 26.67435 0 70 25.00000 26.67435 6.70% - 0s 0 0 26.56667 0 69 25.00000 26.56667 6.27% - 0s 0 0 26.50000 0 68 25.00000 26.50000 6.00% - 0s 0 0 26.45946 0 69 25.00000 26.45946 5.84% - 0s 0 0 26.45536 0 70 25.00000 26.45536 5.82% - 0s 0 0 26.45536 0 70 25.00000 26.45536 5.82% - 0s 0 2 26.45536 0 70 25.00000 26.45536 5.82% - 0s Cutting planes: Zero half: 32 Explored 9 nodes (679 simplex iterations) in 0.05 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%