Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:34:10 2012 Optimize a model with 3402 rows, 3280 columns and 14480 nonzeros Presolve removed 277 rows and 80 columns Presolve time: 0.11s Presolved: 3125 rows, 3200 columns, 13999 nonzeros Variable types: 1560 continuous, 1640 integer (1640 binary) Root relaxation: objective 2.467972e+02, 3742 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 246.79720 0 79 - 246.79720 - - 0s 0 0 268.12320 0 91 - 268.12320 - - 0s 0 0 272.86206 0 97 - 272.86206 - - 0s 0 0 274.20618 0 105 - 274.20618 - - 0s 0 0 276.06614 0 100 - 276.06614 - - 0s 0 0 276.44386 0 107 - 276.44386 - - 0s 0 0 276.44386 0 108 - 276.44386 - - 0s 0 0 276.44386 0 109 - 276.44386 - - 0s 0 2 276.44491 0 107 - 276.44491 - - 2s 63 47 287.42767 6 77 - 278.59944 - 244 5s 290 211 297.10943 17 81 - 280.20767 - 205 10s 482 340 335.90683 54 53 - 281.59099 - 215 15s 604 408 333.69673 32 95 - 281.67614 - 230 20s 620 421 295.58253 11 99 - 295.58253 - 235 25s 675 435 infeasible 38 - 301.84520 - 236 30s 845 462 313.41323 14 90 - 307.38327 - 242 35s H 924 426 360.0000000 308.64229 14.3% 246 38s H 994 318 335.0000000 310.20471 7.40% 236 38s H 1061 281 329.0000000 310.84581 5.52% 228 39s 1063 284 315.14124 21 61 329.00000 310.88566 5.51% 228 40s H 1117 262 328.0000000 311.56120 5.01% 222 40s 1219 252 312.80073 22 84 328.00000 312.80073 4.63% 216 45s 1375 238 315.84192 32 48 328.00000 312.80073 4.63% 203 50s 2006 128 324.44881 37 48 328.00000 319.31068 2.65% 161 55s Cutting planes: Gomory: 25 Cover: 64 Implied bound: 15 Clique: 1 Flow cover: 78 GUB cover: 3 Explored 2313 nodes (342837 simplex iterations) in 56.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.280000000000e+02, best bound 3.280000000000e+02, gap 0.0%