Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:19:28 2012 Optimize a model with 453 rows, 439 columns and 1569 nonzeros Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 453 rows, 412 columns, 1542 nonzeros Variable types: 0 continuous, 412 integer (411 binary) Found heuristic solution: objective 77.0000000 Root relaxation: objective 0.000000e+00, 230 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 174 77.00000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s 0 0 0.25869 0 176 67.00000 0.25869 100% - 0s H 0 0 55.0000000 0.25869 100% - 0s 0 0 0.71834 0 179 55.00000 0.71834 98.7% - 0s H 0 0 40.0000000 0.71834 98.2% - 0s 0 0 0.71834 0 179 40.00000 0.71834 98.2% - 0s 0 2 0.78373 0 179 40.00000 0.78373 98.0% - 0s * 51 36 31 15.0000000 1.00000 93.3% 30.8 0s * 127 71 18 14.0000000 2.03857 85.4% 31.6 0s Cutting planes: Gomory: 3 Zero half: 1 Explored 1064 nodes (30356 simplex iterations) in 1.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.400000000000e+01, best bound 1.400000000000e+01, gap 0.0%