Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:43 2012 Optimize a model with 218 rows, 68 columns and 436 nonzeros Presolve removed 44 rows and 2 columns Presolve time: 0.00s Presolved: 174 rows, 66 columns, 379 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 2.900000e+01, 91 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 54 23.00000 29.00000 26.1% - 0s 0 0 28.00000 0 63 23.00000 28.00000 21.7% - 0s 0 0 27.85714 0 62 23.00000 27.85714 21.1% - 0s H 0 0 24.0000000 27.85714 16.1% - 0s 0 0 27.42857 0 65 24.00000 27.42857 14.3% - 0s 0 0 27.00000 0 58 24.00000 27.00000 12.5% - 0s 0 0 27.00000 0 52 24.00000 27.00000 12.5% - 0s 0 0 26.66667 0 55 24.00000 26.66667 11.1% - 0s 0 0 26.60000 0 64 24.00000 26.60000 10.8% - 0s 0 0 26.58333 0 65 24.00000 26.58333 10.8% - 0s 0 0 26.58333 0 62 24.00000 26.58333 10.8% - 0s 0 2 26.58333 0 62 24.00000 26.58333 10.8% - 0s H 28 3 25.0000000 26.00000 4.00% 16.4 0s Cutting planes: Zero half: 44 Explored 32 nodes (927 simplex iterations) in 0.04 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%