Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:13:10 2013 Optimize a model with 3400 rows, 106200 columns and 216100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.44s Presolved: 3200 rows, 105900 columns, 211800 nonzeros Variable types: 104000 continuous, 1900 integer (1900 binary) Root relaxation: objective 7.543716e+05, 8490 iterations, 0.67 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 754371.571 0 4 - 754371.571 - - 1s H 0 0 982042.73564 754371.571 23.2% - 1s 0 0 754446.958 0 4 982042.736 754446.958 23.2% - 1s 0 0 754486.007 0 2 982042.736 754486.007 23.2% - 2s H 0 0 757433.81826 754486.007 0.39% - 2s 0 0 754503.437 0 4 757433.818 754503.437 0.39% - 2s 0 0 754508.986 0 4 757433.818 754508.986 0.39% - 3s 0 0 754509.041 0 4 757433.818 754509.041 0.39% - 3s 0 0 754512.011 0 4 757433.818 754512.011 0.39% - 3s 0 0 754516.042 0 4 757433.818 754516.042 0.39% - 4s 0 0 754518.633 0 4 757433.818 754518.633 0.38% - 4s 0 0 754521.690 0 4 757433.818 754521.690 0.38% - 4s 0 0 754523.693 0 4 757433.818 754523.693 0.38% - 5s 0 0 754523.712 0 4 757433.818 754523.712 0.38% - 5s 0 0 754527.350 0 4 757433.818 754527.350 0.38% - 5s 0 0 754527.404 0 4 757433.818 754527.404 0.38% - 5s 0 0 754527.665 0 4 757433.818 754527.665 0.38% - 6s 0 0 754527.933 0 4 757433.818 754527.933 0.38% - 6s 0 0 754527.933 0 4 757433.818 754527.933 0.38% - 7s 0 2 754554.273 0 4 757433.818 754554.273 0.38% - 7s 18 15 754968.083 17 2 757433.818 754764.151 0.35% 83.4 10s H 64 13 755679.58081 754764.151 0.12% 49.9 14s 69 15 755676.522 68 2 755679.581 754764.151 0.12% 50.1 15s 211 40 755587.069 140 1 755679.581 754773.912 0.12% 27.0 20s 288 50 cutoff 6 755679.581 754930.742 0.10% 35.9 25s 351 29 755529.385 12 3 755679.581 755367.514 0.04% 47.5 30s Cutting planes: Flow cover: 48 Explored 401 nodes (29022 simplex iterations) in 32.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.556795808113e+05, best bound 7.556059927506e+05, gap 0.0097%