Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:46:19 2012 Optimize a model with 20942 rows, 5550 columns and 68080 nonzeros Presolve time: 0.16s Presolved: 20942 rows, 5550 columns, 68136 nonzeros Variable types: 0 continuous, 5550 integer (5550 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 2.000000e+00, 5045 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 148 50.00000 2.00000 96.0% - 0s H 0 0 19.0000000 2.00000 89.5% - 0s H 0 0 6.0000000 2.00000 66.7% - 3s 0 0 2.00000 0 148 6.00000 2.00000 66.7% - 9s 0 0 2.00000 0 148 6.00000 2.00000 66.7% - 18s 0 0 2.00000 0 148 6.00000 2.00000 66.7% - 28s H 0 0 5.0000000 2.00000 60.0% - 31s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 39s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 50s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 59s 0 2 2.00000 0 148 5.00000 2.00000 60.0% - 82s 1 3 3.00000 1 1113 5.00000 2.00000 60.0% 68726 102s 2 4 3.00000 1 1051 5.00000 3.00000 40.0% 54710 119s 3 5 3.00000 2 491 5.00000 3.00000 40.0% 37393 121s 14 10 cutoff 9 5.00000 3.00000 40.0% 10162 127s 21 9 3.00000 2 361 5.00000 3.00000 40.0% 7684 132s 27 11 3.33333 4 293 5.00000 3.00000 40.0% 6871 141s 81 39 4.00000 15 120 5.00000 4.00000 20.0% 2473 155s 169 43 cutoff 22 5.00000 4.00000 20.0% 1473 161s 179 39 cutoff 17 5.00000 4.00000 20.0% 1540 165s 200 42 cutoff 11 5.00000 4.00000 20.0% 1530 170s 205 41 cutoff 11 5.00000 4.00000 20.0% 1628 175s 214 40 cutoff 9 5.00000 4.00000 20.0% 1713 180s 265 31 cutoff 10 5.00000 4.00000 20.0% 1516 186s * 299 1 17 4.0000000 4.00000 0.0% 1430 189s Cutting planes: Clique: 174 Explored 300 nodes (566594 simplex iterations) in 189.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%