Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:42 2012 Optimize a model with 199 rows, 65 columns and 398 nonzeros Presolve removed 82 rows and 7 columns Presolve time: 0.00s Presolved: 117 rows, 58 columns, 270 nonzeros Variable types: 0 continuous, 58 integer (58 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 2.625000e+01, 86 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 26.25000 0 47 23.00000 26.25000 14.1% - 0s H 0 0 24.0000000 26.25000 9.38% - 0s 0 0 26.00000 0 52 24.00000 26.00000 8.33% - 0s 0 0 26.00000 0 50 24.00000 26.00000 8.33% - 0s 0 0 25.77778 0 57 24.00000 25.77778 7.41% - 0s 0 0 25.62500 0 54 24.00000 25.62500 6.77% - 0s 0 0 25.62500 0 50 24.00000 25.62500 6.77% - 0s 0 0 25.57746 0 57 24.00000 25.57746 6.57% - 0s 0 0 25.56303 0 57 24.00000 25.56303 6.51% - 0s 0 0 25.56250 0 57 24.00000 25.56250 6.51% - 0s 0 0 25.56250 0 57 24.00000 25.56250 6.51% - 0s 0 2 25.56250 0 57 24.00000 25.56250 6.51% - 0s * 12 2 3 25.0000000 25.53191 2.13% 8.9 0s Cutting planes: Zero half: 21 Explored 13 nodes (355 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%