Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:04:36 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 1.937272e+04, 125 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19372.7157 0 4 - 19372.7157 - - 0s 0 0 19392.6763 0 4 - 19392.6763 - - 0s 0 0 19396.0749 0 4 - 19396.0749 - - 0s 0 0 19400.5740 0 5 - 19400.5740 - - 0s 0 0 19405.2863 0 4 - 19405.2863 - - 0s 0 0 19409.0954 0 6 - 19409.0954 - - 0s 0 0 19412.7805 0 4 - 19412.7805 - - 0s 0 0 19413.2266 0 9 - 19413.2266 - - 0s 0 0 19415.9601 0 4 - 19415.9601 - - 0s 0 0 19417.2618 0 13 - 19417.2618 - - 0s 0 0 19418.5935 0 4 - 19418.5935 - - 0s 0 0 19418.7568 0 14 - 19418.7568 - - 0s 0 0 19419.4236 0 10 - 19419.4236 - - 0s 0 0 19419.9968 0 16 - 19419.9968 - - 0s 0 0 19420.1043 0 10 - 19420.1043 - - 0s 0 0 19420.7088 0 16 - 19420.7088 - - 0s 0 0 19420.9886 0 9 - 19420.9886 - - 0s 0 0 19420.9886 0 9 - 19420.9886 - - 0s 0 2 19420.9886 0 9 - 19420.9886 - - 0s * 35 8 18 19513.742915 19512.9094 0.00% 12.8 0s Cutting planes: Gomory: 2 Implied bound: 27 Flow cover: 7 Explored 36 nodes (743 simplex iterations) in 0.91 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.951374291540e+04, best bound 1.951290939046e+04, gap 0.0043%