current bounds on the number of colors: 0 -- 121 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:23:03 2012 Optimize a model with 48541 rows, 8067 columns and 152520 nonzeros Presolve time: 0.16s Presolved: 48541 rows, 8067 columns, 152520 nonzeros Variable types: 0 continuous, 8067 integer (8067 binary) Root relaxation: objective 0.000000e+00, 289 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (627 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 60 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:23:04 2012 Optimize a model with 24331 rows, 4437 columns and 76260 nonzeros Presolve time: 0.11s Presolved: 24331 rows, 4437 columns, 76260 nonzeros Variable types: 0 continuous, 4437 integer (4437 binary) Root relaxation: objective 0.000000e+00, 294 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (657 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 30 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:23:04 2012 Optimize a model with 12226 rows, 2622 columns and 38130 nonzeros Presolve time: 0.04s Presolved: 12226 rows, 2622 columns, 38130 nonzeros Variable types: 0 continuous, 2622 integer (2622 binary) Root relaxation: objective 0.000000e+00, 246 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (506 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:23:04 2012 Optimize a model with 5770 rows, 1654 columns and 17794 nonzeros Presolve time: 0.02s Presolved: 5770 rows, 1654 columns, 17794 nonzeros Variable types: 0 continuous, 1654 integer (1654 binary) Root relaxation: objective 0.000000e+00, 259 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1436 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:23:04 2012 Optimize a model with 2542 rows, 1170 columns and 7626 nonzeros Presolve time: 0.01s Presolved: 2542 rows, 1170 columns, 7626 nonzeros Variable types: 0 continuous, 1170 integer (1170 binary) Root relaxation: objective 0.000000e+00, 271 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Clique: 352 Zero half: 444 Explored 0 nodes (1627 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:23:05 2012 Optimize a model with 4156 rows, 1412 columns and 12710 nonzeros Presolve time: 0.01s Presolved: 4156 rows, 1412 columns, 12710 nonzeros Variable types: 0 continuous, 1412 integer (1412 binary) Root relaxation: objective 0.000000e+00, 256 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 234 - 0.00000 - - 0s 0 0 0.00000 0 259 - 0.00000 - - 0s 0 0 0.00000 0 251 - 0.00000 - - 1s 0 0 0.00000 0 361 - 0.00000 - - 1s 0 0 0.00000 0 291 - 0.00000 - - 1s 0 0 0.00000 0 301 - 0.00000 - - 2s 0 0 0.00000 0 279 - 0.00000 - - 3s 0 0 0.00000 0 272 - 0.00000 - - 3s 0 0 0.00000 0 276 - 0.00000 - - 4s 0 0 0.00000 0 315 - 0.00000 - - 4s 0 0 0.00000 0 266 - 0.00000 - - 4s 0 2 0.00000 0 266 - 0.00000 - - 5s 674 35 infeasible 29 - 0.00000 - 103 10s 707 47 0.00000 4 238 - 0.00000 - 102 15s 747 72 0.00000 28 212 - 0.00000 - 146 20s 999 96 0.00000 28 278 - 0.00000 - 169 25s 1234 129 infeasible 41 - 0.00000 - 187 30s 1510 167 0.00000 27 212 - 0.00000 - 195 35s 1782 175 infeasible 29 - 0.00000 - 201 40s 2023 188 0.00000 32 241 - 0.00000 - 207 45s 2268 213 infeasible 25 - 0.00000 - 212 50s 2535 250 infeasible 28 - 0.00000 - 214 55s 2792 251 infeasible 30 - 0.00000 - 217 60s 3018 271 0.00000 28 263 - 0.00000 - 220 65s 3235 296 infeasible 31 - 0.00000 - 223 70s 3448 299 infeasible 30 - 0.00000 - 227 75s 3674 307 0.00000 32 282 - 0.00000 - 230 80s 3899 304 0.00000 32 265 - 0.00000 - 232 85s 4116 293 infeasible 28 - 0.00000 - 235 90s 4349 302 infeasible 32 - 0.00000 - 236 95s 4563 296 0.00000 32 262 - 0.00000 - 238 100s 4781 290 infeasible 32 - 0.00000 - 240 105s 5015 304 infeasible 23 - 0.00000 - 241 110s 5206 299 0.00000 22 289 - 0.00000 - 243 115s 5453 310 infeasible 31 - 0.00000 - 244 120s 5674 327 infeasible 32 - 0.00000 - 245 125s 5881 330 infeasible 27 - 0.00000 - 247 130s 6115 338 0.00000 29 210 - 0.00000 - 247 135s 6355 358 infeasible 25 - 0.00000 - 247 140s 6603 354 0.00000 25 264 - 0.00000 - 248 145s 6831 352 0.00000 26 292 - 0.00000 - 248 150s 7060 357 0.00000 29 270 - 0.00000 - 249 155s 7319 338 0.00000 17 310 - 0.00000 - 249 160s 7556 335 infeasible 31 - 0.00000 - 249 165s 7772 323 0.00000 29 257 - 0.00000 - 250 170s 7973 316 infeasible 27 - 0.00000 - 251 175s 8194 311 infeasible 29 - 0.00000 - 252 180s 8439 320 infeasible 28 - 0.00000 - 252 185s 8652 309 infeasible 30 - 0.00000 - 253 190s 8851 306 0.00000 19 288 - 0.00000 - 254 195s 9062 289 infeasible 33 - 0.00000 - 255 200s 9256 283 infeasible 27 - 0.00000 - 256 205s 9508 287 0.00000 31 247 - 0.00000 - 255 210s 9728 299 infeasible 34 - 0.00000 - 256 215s 9966 299 infeasible 26 - 0.00000 - 256 220s 10203 298 0.00000 25 278 - 0.00000 - 256 225s 10423 284 infeasible 25 - 0.00000 - 256 230s 10639 292 infeasible 27 - 0.00000 - 256 235s 10841 282 infeasible 29 - 0.00000 - 257 240s 11034 265 infeasible 29 - 0.00000 - 258 245s 11250 265 infeasible 30 - 0.00000 - 258 250s 11458 253 0.00000 20 283 - 0.00000 - 259 255s 11647 256 infeasible 30 - 0.00000 - 260 260s 11843 248 0.00000 31 202 - 0.00000 - 260 265s 12063 232 infeasible 28 - 0.00000 - 261 270s 12261 216 0.00000 24 280 - 0.00000 - 261 275s 12461 214 0.00000 28 245 - 0.00000 - 262 280s 12683 198 0.00000 27 295 - 0.00000 - 262 285s 12886 179 infeasible 22 - 0.00000 - 263 290s 13082 157 infeasible 23 - 0.00000 - 263 295s Cutting planes: Clique: 4 Zero half: 10 Explored 13160 nodes (3502650 simplex iterations) in 297.10 seconds Thread count was 1 (of 16 available processors) Time limit reached Best objective -, best bound 0.000000000000e+00, gap - current bounds on the number of colors: 5 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:28:02 2012 Optimize a model with 4963 rows, 1533 columns and 15252 nonzeros Presolve time: 0.01s Presolved: 4963 rows, 1533 columns, 15252 nonzeros Variable types: 0 continuous, 1533 integer (1533 binary) Root relaxation: objective 0.000000e+00, 261 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 242 - 0.00000 - - 0s Explored 0 nodes (638 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Time limit reached Best objective -, best bound 0.000000000000e+00, gap - optimal solution found: number of colors: 7