Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:35 2013 Optimize a model with 495 rows, 20295 columns and 40545 nonzeros Presolve time: 0.03s Presolved: 495 rows, 20295 columns, 40545 nonzeros Variable types: 20250 continuous, 45 integer (45 binary) Root relaxation: objective 4.377012e+04, 687 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43770.1239 0 6 - 43770.1239 - - 0s H 0 0 44838.000000 43770.1239 2.38% - 0s H 0 0 44381.000000 43770.1239 1.38% - 0s H 0 0 44309.000000 43770.1239 1.22% - 0s 0 0 43929.6592 0 3 44309.0000 43929.6592 0.86% - 0s H 0 0 44290.748344 43929.6592 0.82% - 0s H 0 0 44160.000000 43929.6592 0.52% - 0s 0 0 43938.3948 0 3 44160.0000 43938.3948 0.50% - 0s 0 0 43938.6140 0 3 44160.0000 43938.6140 0.50% - 0s 0 0 43940.3976 0 4 44160.0000 43940.3976 0.50% - 0s 0 0 43942.1528 0 4 44160.0000 43942.1528 0.49% - 0s 0 0 43942.6380 0 3 44160.0000 43942.6380 0.49% - 0s 0 0 43942.7365 0 5 44160.0000 43942.7365 0.49% - 0s 0 0 43942.8078 0 3 44160.0000 43942.8078 0.49% - 0s 0 0 43942.9177 0 2 44160.0000 43942.9177 0.49% - 0s 0 0 43942.9177 0 2 44160.0000 43942.9177 0.49% - 0s 0 0 43963.9684 0 5 44160.0000 43963.9684 0.44% - 0s 0 0 43985.2084 0 5 44160.0000 43985.2084 0.40% - 0s 0 0 43985.2084 0 5 44160.0000 43985.2084 0.40% - 0s 0 0 43985.2084 0 3 44160.0000 43985.2084 0.40% - 0s 0 0 44011.1000 0 4 44160.0000 44011.1000 0.34% - 0s 0 0 44015.8878 0 6 44160.0000 44015.8878 0.33% - 0s 0 0 44016.2456 0 3 44160.0000 44016.2456 0.33% - 0s H 0 0 44044.000000 44016.2456 0.06% - 0s 0 0 44016.9795 0 3 44044.0000 44016.9795 0.06% - 0s 0 0 44017.0599 0 3 44044.0000 44017.0599 0.06% - 0s 0 0 44017.1692 0 3 44044.0000 44017.1692 0.06% - 0s 0 0 44018.0702 0 2 44044.0000 44018.0702 0.06% - 0s 0 2 44018.7814 0 2 44044.0000 44018.7814 0.06% - 0s * 7 0 2 44032.000000 44032.0000 0.0% 14.3 0s Cutting planes: Implied bound: 78 Flow cover: 9 Explored 8 nodes (1826 simplex iterations) in 0.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.403200000000e+04, best bound 4.403200000000e+04, gap 0.0%