Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:56:59 2012 Optimize a model with 549 rows, 507 columns and 1877 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 549 rows, 489 columns, 1859 nonzeros Variable types: 0 continuous, 489 integer (488 binary) Found heuristic solution: objective 105.0000000 Root relaxation: objective 0.000000e+00, 273 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 0 210 105.00000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s H 0 0 64.0000000 0.00000 100% - 0s 0 0 0.28272 0 212 64.00000 0.28272 100% - 0s H 0 0 42.0000000 0.28272 99.3% - 0s 0 0 0.71458 0 213 42.00000 0.71458 98.3% - 0s H 0 0 41.0000000 0.71458 98.3% - 0s 0 0 0.71458 0 214 41.00000 0.71458 98.3% - 0s 0 0 0.71458 0 213 41.00000 0.71458 98.3% - 0s 0 2 0.71458 0 213 41.00000 0.71458 98.3% - 0s H 27 27 40.0000000 1.00000 97.5% 44.6 0s * 61 53 37 22.0000000 1.00000 95.5% 29.2 0s * 104 61 30 20.0000000 1.00000 95.0% 29.1 0s H 216 130 19.0000000 1.81866 90.4% 34.7 0s * 598 189 16 18.0000000 7.00000 61.1% 32.7 0s Cutting planes: Gomory: 2 Mod-K: 2 Explored 2249 nodes (85576 simplex iterations) in 4.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%