Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:45 2012 Optimize a model with 265 rows, 73 columns and 530 nonzeros Presolve removed 87 rows and 2 columns Presolve time: 0.00s Presolved: 178 rows, 71 columns, 412 nonzeros Variable types: 0 continuous, 71 integer (71 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 2.900000e+01, 159 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 56 22.00000 29.00000 31.8% - 0s H 0 0 24.0000000 29.00000 20.8% - 0s 0 0 28.60000 0 69 24.00000 28.60000 19.2% - 0s 0 0 28.16346 0 67 24.00000 28.16346 17.3% - 0s H 0 0 25.0000000 28.16346 12.7% - 0s 0 0 27.73333 0 65 25.00000 27.73333 10.9% - 0s 0 0 27.50000 0 63 25.00000 27.50000 10.0% - 0s 0 0 27.33333 0 65 25.00000 27.33333 9.33% - 0s 0 0 27.33333 0 62 25.00000 27.33333 9.33% - 0s 0 0 27.24138 0 69 25.00000 27.24138 8.97% - 0s 0 0 27.20430 0 69 25.00000 27.20430 8.82% - 0s 0 0 27.16710 0 70 25.00000 27.16710 8.67% - 0s 0 0 27.16667 0 70 25.00000 27.16667 8.67% - 0s 0 0 27.16667 0 70 25.00000 27.16667 8.67% - 0s 0 2 27.16667 0 70 25.00000 27.16667 8.67% - 0s * 24 1 4 26.0000000 26.14286 0.55% 23.2 0s Cutting planes: Clique: 1 Zero half: 36 Explored 25 nodes (1115 simplex iterations) in 0.05 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%