Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:43 2012 Optimize a model with 221 rows, 69 columns and 442 nonzeros Presolve removed 65 rows and 2 columns Presolve time: 0.00s Presolved: 156 rows, 67 columns, 350 nonzeros Variable types: 0 continuous, 67 integer (67 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 2.900000e+01, 83 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 24.00000 29.00000 20.8% - 0s 0 0 28.00000 0 63 24.00000 28.00000 16.7% - 0s 0 0 27.67143 0 63 24.00000 27.67143 15.3% - 0s 0 0 27.50000 0 62 24.00000 27.50000 14.6% - 0s 0 0 27.43558 0 65 24.00000 27.43558 14.3% - 0s 0 0 27.35096 0 65 24.00000 27.35096 14.0% - 0s 0 0 27.20122 0 65 24.00000 27.20122 13.3% - 0s H 0 0 25.0000000 27.20122 8.80% - 0s 0 0 27.19802 0 64 25.00000 27.19802 8.79% - 0s 0 0 27.17480 0 65 25.00000 27.17480 8.70% - 0s 0 0 27.17480 0 65 25.00000 27.17480 8.70% - 0s H 0 0 26.0000000 27.17480 4.52% - 0s 0 2 27.16667 0 64 26.00000 27.16667 4.49% - 0s Cutting planes: Gomory: 1 Zero half: 25 Explored 3 nodes (320 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%