Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:10:26 2013 Optimize a model with 8280 rows, 12040 columns and 40020 nonzeros Presolve removed 60 rows and 40 columns Presolve time: 0.20s Presolved: 8220 rows, 12000 columns, 31960 nonzeros Variable types: 8020 continuous, 3980 integer (3980 binary) Root relaxation: objective 4.370285e+04, 3445 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43702.8549 0 2 - 43702.8549 - - 0s 0 0 43729.7176 0 1 - 43729.7176 - - 0s 0 0 43730.3920 0 1 - 43730.3920 - - 0s 0 0 43731.9269 0 1 - 43731.9269 - - 0s 0 0 43731.9269 0 1 - 43731.9269 - - 0s 0 0 43732.6943 0 1 - 43732.6943 - - 0s 0 0 43732.6943 0 1 - 43732.6943 - - 0s 0 2 43733.0691 0 1 - 43733.0691 - - 1s 303 305 43917.5349 303 1 - 43849.7094 - 7.1 5s H 432 318 44052.826720 43849.7094 0.46% 8.3 6s 607 469 44036.7445 390 1 44052.8267 43857.1166 0.44% 7.6 10s H 1084 688 44044.306288 43858.3286 0.42% 19.1 14s * 1086 648 250 44042.761061 43858.3286 0.42% 19.2 14s 1166 695 43939.3938 52 1 44042.7611 43862.7877 0.41% 18.8 15s H 1532 181 43910.192736 43867.2304 0.10% 17.2 16s * 1990 194 33 43907.423309 43881.8509 0.06% 14.7 18s H 1991 169 43904.049061 43881.8509 0.05% 14.7 18s H 1992 165 43903.569741 43881.8509 0.05% 14.8 18s * 1995 149 33 43900.867770 43881.8509 0.04% 14.8 18s Cutting planes: Gomory: 1 Flow cover: 7 Explored 2310 nodes (34324 simplex iterations) in 19.37 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.390086776983e+04, best bound 4.389650175110e+04, gap 0.0099%