Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:17:52 2013 Optimize a model with 29754 rows, 29214 columns and 116694 nonzeros Presolve removed 1052 rows and 0 columns Presolve time: 0.17s Presolved: 28702 rows, 29214 columns, 114590 nonzeros Variable types: 29160 continuous, 54 integer (54 binary) Root relaxation: objective 6.155116e+04, 5176 iterations, 0.53 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61551.1583 0 4 - 61551.1583 - - 0s H 0 0 61781.000000 61551.1583 0.37% - 0s H 0 0 61643.000000 61551.1583 0.15% - 0s 0 0 61552.7960 0 6 61643.0000 61552.7960 0.15% - 1s 0 0 61552.7960 0 4 61643.0000 61552.7960 0.15% - 1s 0 0 61588.2725 0 5 61643.0000 61588.2725 0.09% - 1s 0 0 61588.9331 0 4 61643.0000 61588.9331 0.09% - 1s 0 0 61628.6667 0 1 61643.0000 61628.6667 0.02% - 2s 0 0 cutoff 0 61643.0000 61643.0000 0.0% - 2s Cutting planes: Flow cover: 1 Explored 0 nodes (7612 simplex iterations) in 2.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.164300000000e+04, best bound 6.164300000000e+04, gap 0.0%