Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:12:23 2013 Optimize a model with 561 rows, 26061 columns and 52071 nonzeros Presolve time: 0.04s Presolved: 561 rows, 26061 columns, 52071 nonzeros Variable types: 26010 continuous, 51 integer (51 binary) Root relaxation: objective 5.131999e+04, 941 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51319.9926 0 10 - 51319.9926 - - 0s H 0 0 55123.000000 51319.9926 6.90% - 0s H 0 0 51604.000000 51319.9926 0.55% - 0s 0 0 51418.1463 0 4 51604.0000 51418.1463 0.36% - 0s 0 0 51431.5050 0 4 51604.0000 51431.5050 0.33% - 0s 0 0 51432.5046 0 4 51604.0000 51432.5046 0.33% - 0s 0 0 51437.4974 0 4 51604.0000 51437.4974 0.32% - 0s 0 0 51439.1301 0 4 51604.0000 51439.1301 0.32% - 0s 0 0 51439.1301 0 4 51604.0000 51439.1301 0.32% - 0s 0 0 51439.4611 0 4 51604.0000 51439.4611 0.32% - 0s 0 0 51439.7306 0 4 51604.0000 51439.7306 0.32% - 0s 0 0 51443.0816 0 3 51604.0000 51443.0816 0.31% - 0s 0 0 51443.8057 0 4 51604.0000 51443.8057 0.31% - 0s 0 0 51443.8057 0 4 51604.0000 51443.8057 0.31% - 0s 0 0 51443.8057 0 4 51604.0000 51443.8057 0.31% - 0s 0 0 51443.8057 0 4 51604.0000 51443.8057 0.31% - 0s 0 0 51491.1000 0 4 51604.0000 51491.1000 0.22% - 0s 0 0 51504.1692 0 3 51604.0000 51504.1692 0.19% - 0s 0 0 51504.1692 0 7 51604.0000 51504.1692 0.19% - 0s 0 0 51513.8147 0 4 51604.0000 51513.8147 0.17% - 0s 0 0 51520.5370 0 3 51604.0000 51520.5370 0.16% - 0s 0 0 51521.1116 0 2 51604.0000 51521.1116 0.16% - 0s 0 0 51521.1609 0 3 51604.0000 51521.1609 0.16% - 0s 0 0 51522.2137 0 2 51604.0000 51522.2137 0.16% - 0s 0 0 51522.9640 0 2 51604.0000 51522.9640 0.16% - 0s 0 0 51523.0300 0 2 51604.0000 51523.0300 0.16% - 0s 0 0 51523.0300 0 2 51604.0000 51523.0300 0.16% - 1s 0 0 51523.3157 0 2 51604.0000 51523.3157 0.16% - 1s 0 0 51523.3157 0 2 51604.0000 51523.3157 0.16% - 1s 0 0 51523.3565 0 2 51604.0000 51523.3565 0.16% - 1s 0 0 51523.7284 0 2 51604.0000 51523.7284 0.16% - 1s 0 2 51531.5818 0 2 51604.0000 51531.5818 0.14% - 1s Cutting planes: Implied bound: 37 Flow cover: 4 Explored 3 nodes (2321 simplex iterations) in 1.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.160400000000e+04, best bound 5.160400000000e+04, gap 0.0%