Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:49:20 2012 Optimize a model with 575 rows, 519 columns and 1954 nonzeros Presolve removed 0 rows and 11 columns Presolve time: 0.00s Presolved: 575 rows, 508 columns, 1943 nonzeros Variable types: 0 continuous, 508 integer (507 binary) Found heuristic solution: objective 112.0000000 Root relaxation: objective 0.000000e+00, 263 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 0 214 112.00000 0.00000 100% - 0s H 0 0 82.0000000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s 0 0 0.46848 0 216 74.00000 0.46848 99.4% - 0s H 0 0 59.0000000 0.46848 99.2% - 0s 0 0 0.86742 0 218 59.00000 0.86742 98.5% - 0s H 0 0 54.0000000 0.86742 98.4% - 0s 0 0 0.86788 0 219 54.00000 0.86788 98.4% - 0s H 0 0 51.0000000 0.86788 98.3% - 0s H 0 0 48.0000000 0.86788 98.2% - 0s H 0 0 45.0000000 0.86788 98.1% - 0s 0 2 0.87033 0 219 45.00000 0.87033 98.1% - 0s * 48 43 29 23.0000000 1.00000 95.7% 45.3 0s * 52 29 29 22.0000000 1.00000 95.5% 45.4 0s * 161 79 30 21.0000000 1.00000 95.2% 43.0 0s * 1636 403 28 20.0000000 12.04420 39.8% 33.3 3s 2630 457 17.40000 21 208 20.00000 13.80110 31.0% 29.8 5s Explored 5482 nodes (147895 simplex iterations) in 9.46 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%