Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:08:21 2013 Optimize a model with 23616 rows, 23136 columns and 92256 nonzeros Presolve removed 48 rows and 0 columns Presolve time: 0.10s Presolved: 23568 rows, 23136 columns, 92208 nonzeros Variable types: 23088 continuous, 48 integer (48 binary) Root relaxation: objective 3.841968e+04, 2624 iterations, 0.52 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38419.6792 0 37 - 38419.6792 - - 0s H 0 0 49249.000000 38419.6792 22.0% - 1s 0 0 41702.2761 0 5 49249.0000 41702.2761 15.3% - 2s H 0 0 45212.373195 41702.2761 7.76% - 2s H 0 0 43409.000000 41702.2761 3.93% - 2s 0 0 41838.1995 0 4 43409.0000 41838.1995 3.62% - 2s H 0 0 43052.000000 41838.1995 2.82% - 2s 0 0 41923.9376 0 3 43052.0000 41923.9376 2.62% - 2s 0 0 41928.2500 0 2 43052.0000 41928.2500 2.61% - 2s H 0 0 42914.000000 41928.2500 2.30% - 2s H 0 0 42638.000000 41928.2500 1.66% - 2s 0 2 41928.9773 0 2 42638.0000 41928.9773 1.66% - 2s H 7 6 42617.000000 42014.7663 1.41% 70.4 3s * 20 8 9 42513.000000 42023.0206 1.15% 138 3s H 23 5 42424.125000 42023.0206 0.95% 120 4s H 24 3 42249.000000 42077.6667 0.41% 124 4s H 26 5 42220.846154 42077.6667 0.34% 118 4s H 30 7 42198.000000 42077.6667 0.29% 109 4s * 32 8 12 42182.000000 42077.6667 0.25% 104 4s * 37 0 6 42149.000000 42149.0000 0.0% 96.1 4s Cutting planes: Implied bound: 41 Explored 38 nodes (8017 simplex iterations) in 4.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.214900000000e+04, best bound 4.214900000000e+04, gap 0.0%