Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:13:38 2012 Optimize a model with 509 rows, 464 columns and 1734 nonzeros Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 509 rows, 442 columns, 1712 nonzeros Variable types: 0 continuous, 442 integer (441 binary) Found heuristic solution: objective 105.0000000 Root relaxation: objective 0.000000e+00, 247 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 0 185 105.00000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s 0 0 0.67833 0 186 69.00000 0.67833 99.0% - 0s H 0 0 67.0000000 0.67833 99.0% - 0s 0 0 1.00000 0 187 67.00000 1.00000 98.5% - 0s H 0 0 62.0000000 1.00000 98.4% - 0s 0 0 1.17001 0 188 62.00000 1.17001 98.1% - 0s H 0 0 50.0000000 1.17001 97.7% - 0s 0 0 1.35619 0 190 50.00000 1.35619 97.3% - 0s H 0 0 43.0000000 1.35619 96.8% - 0s 0 0 1.36107 0 189 43.00000 1.36107 96.8% - 0s H 0 0 42.0000000 1.36107 96.8% - 0s 0 0 1.36107 0 189 42.00000 1.36107 96.8% - 0s H 0 0 39.0000000 1.36107 96.5% - 0s 0 2 1.36187 0 189 39.00000 1.36187 96.5% - 0s H 62 41 22.0000000 1.50617 93.2% 32.5 0s * 214 124 19 21.0000000 1.58763 92.4% 31.9 0s H 1746 635 20.0000000 9.92638 50.4% 27.6 2s 3707 1217 14.47945 18 172 20.00000 12.70000 36.5% 23.3 5s 8385 1865 18.04605 19 179 20.00000 14.59574 27.0% 21.1 10s 13773 1676 cutoff 19 20.00000 16.04615 19.8% 20.4 15s Explored 19508 nodes (377783 simplex iterations) in 19.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%