Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:09 2013 Optimize a model with 2280 rows, 6040 columns and 16020 nonzeros Presolve removed 60 rows and 40 columns Presolve time: 0.06s Presolved: 2220 rows, 6000 columns, 13960 nonzeros Variable types: 5020 continuous, 980 integer (980 binary) Root relaxation: objective 3.860476e+04, 1077 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38604.7615 0 3 - 38604.7615 - - 0s 0 0 38714.1404 0 3 - 38714.1404 - - 0s 0 0 38754.2671 0 3 - 38754.2671 - - 0s 0 0 38758.3662 0 3 - 38758.3662 - - 0s 0 0 38770.5692 0 3 - 38770.5692 - - 0s 0 0 38780.7011 0 3 - 38780.7011 - - 0s 0 0 38786.4782 0 3 - 38786.4782 - - 0s 0 0 38789.4029 0 4 - 38789.4029 - - 0s 0 0 38791.1649 0 3 - 38791.1649 - - 0s 0 0 38793.5253 0 3 - 38793.5253 - - 0s 0 0 38795.7451 0 4 - 38795.7451 - - 0s 0 0 38797.8644 0 4 - 38797.8644 - - 0s 0 0 38802.3072 0 3 - 38802.3072 - - 0s 0 0 38803.4751 0 3 - 38803.4751 - - 0s 0 0 38803.7959 0 3 - 38803.7959 - - 0s 0 0 38809.3084 0 3 - 38809.3084 - - 0s 0 0 38809.3885 0 4 - 38809.3885 - - 0s 0 0 38809.6568 0 3 - 38809.6568 - - 0s 0 0 38809.8365 0 4 - 38809.8365 - - 0s H 0 0 43621.603553 38809.8365 11.0% - 0s 0 2 38810.7979 0 4 43621.6036 38810.7979 11.0% - 0s H 11 8 38863.145248 38828.0864 0.09% 18.2 0s H 14 6 38862.894219 38828.0864 0.09% 17.4 0s * 15 5 13 38861.053897 38828.0864 0.08% 16.5 0s * 24 7 8 38861.052123 38833.0272 0.07% 14.3 0s Cutting planes: Gomory: 2 Flow cover: 36 Explored 42 nodes (1974 simplex iterations) in 0.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.886105212265e+04, best bound 3.886062397889e+04, gap 0.0011%