Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:42 2012 Optimize a model with 203 rows, 65 columns and 406 nonzeros Presolve removed 63 rows and 3 columns Presolve time: 0.00s Presolved: 140 rows, 62 columns, 315 nonzeros Variable types: 0 continuous, 62 integer (62 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 2.750000e+01, 84 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27.50000 0 41 21.00000 27.50000 31.0% - 0s H 0 0 22.0000000 27.50000 25.0% - 0s H 0 0 24.0000000 27.50000 14.6% - 0s 0 0 26.60000 0 50 24.00000 26.60000 10.8% - 0s 0 0 26.31667 0 61 24.00000 26.31667 9.65% - 0s 0 0 26.20000 0 61 24.00000 26.20000 9.17% - 0s H 0 0 25.0000000 26.20000 4.80% - 0s 0 0 26.12500 0 52 25.00000 26.12500 4.50% - 0s 0 0 cutoff 0 25.00000 25.99997 4.00% - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 26 Explored 0 nodes (227 simplex iterations) in 0.01 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%