Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:40 2013 Optimize a model with 520 rows, 6720 columns and 26260 nonzeros Presolve removed 20 rows and 580 columns Presolve time: 0.03s Presolved: 500 rows, 6140 columns, 24260 nonzeros Variable types: 6020 continuous, 120 integer (120 binary) Root relaxation: objective 3.600389e+04, 415 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36003.8892 0 6 - 36003.8892 - - 0s 0 0 36012.3178 0 6 - 36012.3178 - - 0s 0 0 36014.4704 0 9 - 36014.4704 - - 0s 0 0 36015.6338 0 9 - 36015.6338 - - 0s 0 0 36015.8159 0 9 - 36015.8159 - - 0s 0 0 36017.8264 0 9 - 36017.8264 - - 0s 0 0 36018.0602 0 9 - 36018.0602 - - 0s 0 0 36018.0602 0 9 - 36018.0602 - - 0s 0 0 36018.1056 0 9 - 36018.1056 - - 0s 0 0 36018.1056 0 9 - 36018.1056 - - 0s H 0 0 36388.769579 36018.1056 1.02% - 0s 0 1 36194.4213 0 5 36388.7696 36194.4213 0.53% - 0s * 6 3 6 36202.381588 36200.6933 0.00% 33.8 0s Cutting planes: Flow cover: 9 Explored 7 nodes (895 simplex iterations) in 0.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.620238158816e+04, best bound 3.620069326905e+04, gap 0.0047%