Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:49 2012 Optimize a model with 336 rows, 80 columns and 672 nonzeros Presolve removed 119 rows and 0 columns Presolve time: 0.00s Presolved: 217 rows, 80 columns, 519 nonzeros Variable types: 0 continuous, 80 integer (80 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 2.980515e+01, 146 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 29.80515 0 77 24.00000 29.80515 24.2% - 0s 0 0 29.19923 0 78 24.00000 29.19923 21.7% - 0s 0 0 28.78592 0 78 24.00000 28.78592 19.9% - 0s 0 0 28.63725 0 80 24.00000 28.63725 19.3% - 0s 0 0 28.54492 0 79 24.00000 28.54492 18.9% - 0s H 0 0 26.0000000 28.54492 9.79% - 0s 0 0 28.50394 0 80 26.00000 28.50394 9.63% - 0s 0 0 28.47761 0 78 26.00000 28.47761 9.53% - 0s 0 0 28.40574 0 78 26.00000 28.40574 9.25% - 0s 0 0 28.28846 0 78 26.00000 28.28846 8.80% - 0s 0 0 28.24352 0 78 26.00000 28.24352 8.63% - 0s 0 0 28.23529 0 74 26.00000 28.23529 8.60% - 0s 0 0 28.21429 0 74 26.00000 28.21429 8.52% - 0s 0 0 28.20513 0 77 26.00000 28.20513 8.48% - 0s 0 0 28.20513 0 75 26.00000 28.20513 8.48% - 0s H 0 0 27.0000000 28.20513 4.46% - 0s 0 2 28.20513 0 75 27.00000 28.20513 4.46% - 0s Cutting planes: Gomory: 1 Zero half: 23 Explored 9 nodes (670 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%