Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:32 2013 Optimize a model with 528 rows, 23088 columns and 46128 nonzeros Presolve time: 0.03s Presolved: 528 rows, 23088 columns, 46128 nonzeros Variable types: 23040 continuous, 48 integer (48 binary) Root relaxation: objective 5.720625e+04, 931 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57206.2530 0 9 - 57206.2530 - - 0s H 0 0 58017.000000 57206.2530 1.40% - 0s H 0 0 57728.000000 57206.2530 0.90% - 0s 0 0 57496.3978 0 3 57728.0000 57496.3978 0.40% - 0s 0 0 57513.2392 0 4 57728.0000 57513.2392 0.37% - 0s 0 0 57513.2392 0 9 57728.0000 57513.2392 0.37% - 0s 0 0 57513.2392 0 3 57728.0000 57513.2392 0.37% - 0s 0 0 57523.4805 0 5 57728.0000 57523.4805 0.35% - 0s 0 0 57527.2447 0 3 57728.0000 57527.2447 0.35% - 0s 0 0 57535.7875 0 4 57728.0000 57535.7875 0.33% - 0s 0 0 57536.1137 0 3 57728.0000 57536.1137 0.33% - 0s 0 0 57536.6151 0 3 57728.0000 57536.6151 0.33% - 0s 0 0 57537.9826 0 4 57728.0000 57537.9826 0.33% - 0s 0 0 57540.5195 0 4 57728.0000 57540.5195 0.32% - 0s 0 0 57541.1623 0 3 57728.0000 57541.1623 0.32% - 0s 0 0 57541.4597 0 4 57728.0000 57541.4597 0.32% - 0s 0 0 57541.8495 0 2 57728.0000 57541.8495 0.32% - 0s H 0 0 57632.000000 57541.8495 0.16% - 0s 0 1 57604.2800 0 2 57632.0000 57604.2800 0.05% - 0s Cutting planes: Implied bound: 109 Flow cover: 4 Explored 4 nodes (2626 simplex iterations) in 0.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.763200000000e+04, best bound 5.763200000000e+04, gap 0.0%