Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012 Optimize a model with 185 rows, 64 columns and 370 nonzeros Presolve removed 43 rows and 0 columns Presolve time: 0.00s Presolved: 142 rows, 64 columns, 311 nonzeros Variable types: 0 continuous, 64 integer (64 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 2.750000e+01, 102 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 55 24.00000 27.50000 14.6% - 0s H 0 0 25.0000000 27.50000 10.0% - 0s 0 0 26.96429 0 58 25.00000 26.96429 7.86% - 0s 0 0 26.75000 0 60 25.00000 26.75000 7.00% - 0s 0 0 26.69333 0 60 25.00000 26.69333 6.77% - 0s 0 0 26.50000 0 55 25.00000 26.50000 6.00% - 0s 0 0 26.46429 0 59 25.00000 26.46429 5.86% - 0s 0 0 26.33333 0 58 25.00000 26.33333 5.33% - 0s 0 0 26.25000 0 63 25.00000 26.25000 5.00% - 0s 0 0 26.22222 0 58 25.00000 26.22222 4.89% - 0s 0 0 26.04255 0 61 25.00000 26.04255 4.17% - 0s 0 0 26.03704 0 61 25.00000 26.03704 4.15% - 0s 0 0 26.03704 0 61 25.00000 26.03704 4.15% - 0s 0 1 26.00000 0 61 25.00000 26.00000 4.00% - 0s Cutting planes: Zero half: 22 Explored 2 nodes (308 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%