Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:34 2012 Optimize a model with 529 rows, 104 columns and 1058 nonzeros Presolve removed 204 rows and 3 columns Presolve time: 0.00s Presolved: 325 rows, 101 columns, 800 nonzeros Variable types: 0 continuous, 101 integer (101 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.732895e+01, 210 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.32895 0 99 26.00000 37.32895 43.6% - 0s H 0 0 28.0000000 37.32895 33.3% - 0s 0 0 36.37360 0 98 28.00000 36.37360 29.9% - 0s H 0 0 30.0000000 36.37360 21.2% - 0s 0 0 36.12154 0 99 30.00000 36.12154 20.4% - 0s 0 0 35.89012 0 98 30.00000 35.89012 19.6% - 0s 0 0 35.67881 0 98 30.00000 35.67881 18.9% - 0s 0 0 35.51435 0 98 30.00000 35.51435 18.4% - 0s 0 0 35.49251 0 99 30.00000 35.49251 18.3% - 0s 0 0 35.43788 0 98 30.00000 35.43788 18.1% - 0s 0 0 35.31643 0 99 30.00000 35.31643 17.7% - 0s 0 0 35.13724 0 100 30.00000 35.13724 17.1% - 0s 0 0 35.10187 0 99 30.00000 35.10187 17.0% - 0s 0 0 35.08196 0 100 30.00000 35.08196 16.9% - 0s 0 0 35.08196 0 100 30.00000 35.08196 16.9% - 0s 0 2 35.08120 0 100 30.00000 35.08120 16.9% - 0s * 69 26 15 31.0000000 34.19608 10.3% 25.3 0s Cutting planes: Clique: 3 Zero half: 40 Explored 220 nodes (5359 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%