Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:43 2012 Optimize a model with 231 rows, 68 columns and 462 nonzeros Presolve removed 78 rows and 2 columns Presolve time: 0.00s Presolved: 153 rows, 66 columns, 360 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 2.675000e+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 26.75000 0 51 22.00000 26.75000 21.6% - 0s H 0 0 23.0000000 26.75000 16.3% - 0s 0 0 26.00000 0 57 23.00000 26.00000 13.0% - 0s 0 0 26.00000 0 56 23.00000 26.00000 13.0% - 0s H 0 0 24.0000000 26.00000 8.33% - 0s 0 0 26.00000 0 56 24.00000 26.00000 8.33% - 0s 0 0 26.00000 0 28 24.00000 26.00000 8.33% - 0s 0 2 26.00000 0 26 24.00000 26.00000 8.33% - 0s * 11 4 4 25.0000000 26.00000 4.00% 15.7 0s Explored 14 nodes (591 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%