Optimize a model with 100 rows, 4950 columns and 9900 nonzeros Presolve time: 0.01s Presolved: 100 rows, 4950 columns, 9900 nonzeros Variable types: 0 continuous, 4950 integer (4950 binary) Root relaxation: objective 1.937850e+04, 123 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19378.5000 0 18 - 19378.5000 - - 0s 0 0 19464.0000 0 8 - 19464.0000 - - 0s 0 0 19479.6667 0 13 - 19479.6667 - - 0s 0 0 19489.6667 0 10 - 19489.6667 - - 0s 0 0 19516.1667 0 15 - 19516.1667 - - 0s 0 0 19526.4167 0 21 - 19526.4167 - - 0s 0 0 19538.0000 0 21 - 19538.0000 - - 0s 0 0 19540.7000 0 27 - 19540.7000 - - 0s 0 0 19543.3333 0 25 - 19543.3333 - - 0s 0 0 19546.0000 0 26 - 19546.0000 - - 0s 0 0 19546.5000 0 30 - 19546.5000 - - 0s 0 0 19558.8333 0 26 - 19558.8333 - - 0s 0 0 19977.0000 0 6 - 19977.0000 - - 0s 0 0 20589.0000 0 6 - 20589.0000 - - 0s 0 0 20940.5000 0 22 - 20940.5000 - - 0s 0 0 20959.4167 0 26 - 20959.4167 - - 0s 0 0 20959.4167 0 26 - 20959.4167 - - 0s 0 2 20959.6667 0 26 - 20959.6667 - - 0s * 198 198 152 23887.000000 20996.0000 12.1% 3.7 0s * 229 65 27 21753.000000 21001.5000 3.45% 3.9 0s * 253 41 16 21341.000000 21030.0000 1.46% 4.0 0s H 283 46 21320.000000 21041.5000 1.31% 4.0 0s * 394 63 17 21308.000000 21074.5000 1.10% 3.9 0s * 448 68 7 21292.000000 21104.5000 0.88% 3.9 0s H 480 76 21282.000000 21112.0000 0.80% 3.9 0s Cutting planes: Zero half: 12 Explored 733 nodes (3288 simplex iterations) in 1.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.128200000000e+04, best bound 2.128200000000e+04, gap 0.0% Gurobi 5.0.1 (linux64) logging started Sun Nov 25 02:42:54 2012