Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:26:27 2013 Optimize a model with 1028 rows, 3044 columns and 8082 nonzeros Presolve removed 959 rows and 2833 columns Presolve time: 0.15s Presolved: 69 rows, 211 columns, 422 nonzeros Variable types: 148 continuous, 63 integer (63 binary) Root relaxation: objective 4.810927e+03, 6 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4810.92679 0 2 - 4810.92679 - - 0s 0 0 4830.94972 0 4 - 4830.94972 - - 0s 0 0 4830.94988 0 4 - 4830.94988 - - 0s 0 0 4830.96051 0 4 - 4830.96051 - - 0s 0 0 4830.97132 0 4 - 4830.97132 - - 0s 0 0 4830.98211 0 4 - 4830.98211 - - 0s H 0 0 4832.0930826 4830.98211 0.02% - 0s 0 0 4830.98211 0 2 4832.09308 4830.98211 0.02% - 0s 0 0 4830.98950 0 4 4832.09308 4830.98950 0.02% - 0s 0 0 4830.98962 0 4 4832.09308 4830.98962 0.02% - 0s 0 0 4830.98963 0 4 4832.09308 4830.98963 0.02% - 0s 0 0 4830.99700 0 4 4832.09308 4830.99700 0.02% - 0s 0 0 4831.00438 0 4 4832.09308 4831.00438 0.02% - 0s 0 0 4831.01175 0 4 4832.09308 4831.01175 0.02% - 0s 0 0 4831.01913 0 4 4832.09308 4831.01913 0.02% - 0s 0 0 4831.02651 0 4 4832.09308 4831.02651 0.02% - 0s 0 0 4831.03388 0 4 4832.09308 4831.03388 0.02% - 0s 0 0 4831.04126 0 4 4832.09308 4831.04126 0.02% - 0s 0 0 4831.04864 0 4 4832.09308 4831.04864 0.02% - 0s 0 0 4831.05601 0 4 4832.09308 4831.05601 0.02% - 0s 0 0 4831.06339 0 4 4832.09308 4831.06339 0.02% - 0s 0 0 4831.07077 0 4 4832.09308 4831.07077 0.02% - 0s 0 0 4831.07815 0 4 4832.09308 4831.07815 0.02% - 0s 0 0 4831.08553 0 4 4832.09308 4831.08553 0.02% - 0s 0 0 4831.09291 0 4 4832.09308 4831.09291 0.02% - 0s 0 0 4831.10029 0 4 4832.09308 4831.10029 0.02% - 0s 0 0 4831.10381 0 4 4832.09308 4831.10381 0.02% - 0s 0 0 4831.10732 0 4 4832.09308 4831.10732 0.02% - 0s H 0 0 4831.8915047 4831.10732 0.02% - 0s 0 1 4831.10961 0 4 4831.89150 4831.10961 0.02% - 0s * 15 0 15 4831.1210937 4831.12109 0.0% 1.2 0s Cutting planes: Cover: 2 Flow cover: 2 Explored 16 nodes (199 simplex iterations) in 0.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.831121093654e+03, best bound 4.831121093654e+03, gap 0.0%