Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:04:41 2013 Optimize a model with 2160 rows, 5030 columns and 16050 nonzeros Presolve removed 10 rows and 10 columns Presolve time: 0.14s Presolved: 2150 rows, 5020 columns, 14040 nonzeros Variable types: 3020 continuous, 2000 integer (2000 binary) Root relaxation: objective 1.997658e+04, 144 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19976.5790 0 4 - 19976.5790 - - 0s 0 0 20004.5760 0 4 - 20004.5760 - - 0s 0 0 20007.0372 0 4 - 20007.0372 - - 0s 0 0 20014.8709 0 4 - 20014.8709 - - 0s 0 0 20021.5155 0 4 - 20021.5155 - - 0s 0 0 20022.3311 0 6 - 20022.3311 - - 0s 0 0 20027.6257 0 4 - 20027.6257 - - 0s 0 0 20029.7925 0 7 - 20029.7925 - - 0s 0 0 20032.6558 0 6 - 20032.6558 - - 0s 0 0 20033.2764 0 7 - 20033.2764 - - 0s 0 0 20034.8378 0 9 - 20034.8378 - - 0s 0 0 20036.3933 0 11 - 20036.3933 - - 0s 0 0 20036.9983 0 4 - 20036.9983 - - 0s 0 0 20037.5287 0 10 - 20037.5287 - - 0s 0 0 20038.1138 0 9 - 20038.1138 - - 0s 0 0 20038.4998 0 11 - 20038.4998 - - 0s 0 0 20038.9237 0 15 - 20038.9237 - - 0s 0 0 20040.4331 0 10 - 20040.4331 - - 0s 0 0 20040.9165 0 15 - 20040.9165 - - 0s 0 0 20041.5050 0 10 - 20041.5050 - - 0s 0 0 20041.5244 0 16 - 20041.5244 - - 0s 0 0 20041.6199 0 16 - 20041.6199 - - 0s 0 0 20041.6199 0 16 - 20041.6199 - - 0s H 0 0 20759.641207 20041.6199 3.46% - 0s 0 2 20041.6199 0 16 20759.6412 20041.6199 3.46% - 0s H 27 9 20158.810385 20157.5119 0.01% 9.6 1s Cutting planes: Gomory: 2 Implied bound: 35 Flow cover: 9 Explored 27 nodes (691 simplex iterations) in 1.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.015881038494e+04, best bound 2.015751186932e+04, gap 0.0064%