Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:01:13 2012 Optimize a model with 543 rows, 496 columns and 1851 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 543 rows, 480 columns, 1835 nonzeros Variable types: 0 continuous, 480 integer (479 binary) Found heuristic solution: objective 99.0000000 Root relaxation: objective 0.000000e+00, 272 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 0 203 99.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 80.0000000 0.00000 100% - 0s 0 0 0.57635 0 204 80.00000 0.57635 99.3% - 0s H 0 0 77.0000000 0.57635 99.3% - 0s H 0 0 65.0000000 0.57635 99.1% - 0s 0 0 1.00000 0 205 65.00000 1.00000 98.5% - 0s H 0 0 61.0000000 1.00000 98.4% - 0s 0 0 1.00000 0 208 61.00000 1.00000 98.4% - 0s 0 0 1.00000 0 203 61.00000 1.00000 98.4% - 0s H 0 0 57.0000000 1.00000 98.2% - 0s H 0 0 51.0000000 1.00000 98.0% - 0s H 0 0 46.0000000 1.00000 97.8% - 0s 0 2 1.00000 0 203 46.00000 1.00000 97.8% - 0s H 54 37 20.0000000 1.57803 92.1% 32.3 0s * 381 164 15 19.0000000 6.96522 63.3% 38.5 0s 3188 181 16.44693 19 206 19.00000 14.41463 24.1% 30.2 5s Explored 3847 nodes (113394 simplex iterations) in 5.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%