Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:42 2012 Optimize a model with 227 rows, 67 columns and 454 nonzeros Presolve removed 59 rows and 0 columns Presolve time: 0.00s Presolved: 168 rows, 67 columns, 382 nonzeros Variable types: 0 continuous, 67 integer (67 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 2.750000e+01, 93 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 51 24.00000 27.50000 14.6% - 0s 0 0 26.50000 0 59 24.00000 26.50000 10.4% - 0s 0 0 26.00000 0 60 24.00000 26.00000 8.33% - 0s 0 0 26.00000 0 61 24.00000 26.00000 8.33% - 0s 0 0 26.00000 0 51 24.00000 26.00000 8.33% - 0s H 0 0 25.0000000 26.00000 4.00% - 0s 0 2 26.00000 0 51 25.00000 26.00000 4.00% - 0s Explored 3 nodes (346 simplex iterations) in 0.03 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%