Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:45 2012 Optimize a model with 537 rows, 105 columns and 1074 nonzeros Presolve removed 190 rows and 0 columns Presolve time: 0.00s Presolved: 347 rows, 105 columns, 857 nonzeros Variable types: 0 continuous, 105 integer (105 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.670270e+01, 243 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.70270 0 100 28.00000 36.70270 31.1% - 0s 0 0 36.19984 0 101 28.00000 36.19984 29.3% - 0s 0 0 35.99165 0 103 28.00000 35.99165 28.5% - 0s H 0 0 29.0000000 35.99165 24.1% - 0s 0 0 35.93357 0 104 29.00000 35.93357 23.9% - 0s 0 0 35.82568 0 104 29.00000 35.82568 23.5% - 0s 0 0 35.61741 0 103 29.00000 35.61741 22.8% - 0s 0 0 35.55554 0 103 29.00000 35.55554 22.6% - 0s 0 0 35.47776 0 102 29.00000 35.47776 22.3% - 0s H 0 0 30.0000000 35.47776 18.3% - 0s 0 0 35.45817 0 101 30.00000 35.45817 18.2% - 0s 0 0 35.42782 0 103 30.00000 35.42782 18.1% - 0s 0 0 35.41898 0 102 30.00000 35.41898 18.1% - 0s 0 0 35.40918 0 102 30.00000 35.40918 18.0% - 0s 0 0 35.40918 0 101 30.00000 35.40918 18.0% - 0s 0 2 35.40918 0 101 30.00000 35.40918 18.0% - 0s * 223 36 14 31.0000000 33.96372 9.56% 24.6 0s Cutting planes: Clique: 5 Zero half: 42 Explored 402 nodes (9761 simplex iterations) in 0.36 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%