Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:14:11 2012 Optimize a model with 599 rows, 540 columns and 2035 nonzeros Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 599 rows, 521 columns, 2016 nonzeros Variable types: 0 continuous, 521 integer (520 binary) Found heuristic solution: objective 116.0000000 Root relaxation: objective 0.000000e+00, 293 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 0 208 116.00000 0.00000 100% - 0s H 0 0 96.0000000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s H 0 0 80.0000000 0.00000 100% - 0s 0 0 0.25196 0 210 80.00000 0.25196 100% - 0s H 0 0 78.0000000 0.25196 100% - 0s 0 0 0.68677 0 220 78.00000 0.68677 99.1% - 0s H 0 0 72.0000000 0.68677 99.0% - 0s 0 0 0.68836 0 214 72.00000 0.68836 99.0% - 0s 0 0 0.68836 0 215 72.00000 0.68836 99.0% - 0s 0 0 0.68836 0 215 72.00000 0.68836 99.0% - 0s 0 2 0.70545 0 213 72.00000 0.70545 99.0% - 0s H 27 27 69.0000000 1.00000 98.6% 49.2 0s H 48 46 29.0000000 1.00000 96.6% 40.4 0s * 164 118 13 26.0000000 4.00000 84.6% 41.0 0s * 384 208 21 25.0000000 6.87736 72.5% 38.2 0s H 1358 333 24.0000000 11.56338 51.8% 35.4 2s * 1582 332 27 23.0000000 13.26190 42.3% 34.3 2s 2829 296 20.59412 20 211 23.00000 16.62626 27.7% 31.6 5s Explored 4034 nodes (123014 simplex iterations) in 6.57 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%