current bounds on the number of colors: 0 -- 135 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 06:36:04 2012 Optimize a model with 59899 rows, 9937 columns and 188337 nonzeros Presolve time: 0.19s Presolved: 59899 rows, 9937 columns, 188337 nonzeros Variable types: 0 continuous, 9937 integer (9937 binary) Root relaxation: objective 0.000000e+00, 341 iterations, 0.07 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 (638 simplex iterations) in 0.33 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 -- 67 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 06:36:05 2012 Optimize a model with 29571 rows, 5347 columns and 92763 nonzeros Presolve time: 0.14s Presolved: 29571 rows, 5347 columns, 92763 nonzeros Variable types: 0 continuous, 5347 integer (5347 binary) Root relaxation: objective 0.000000e+00, 404 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 (949 simplex iterations) in 0.23 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 -- 33 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 06:36:05 2012 Optimize a model with 14407 rows, 3052 columns and 44976 nonzeros Presolve time: 0.05s Presolved: 14407 rows, 3052 columns, 44976 nonzeros Variable types: 0 continuous, 3052 integer (3052 binary) Root relaxation: objective 0.000000e+00, 273 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 (526 simplex iterations) in 0.08 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 06:36:05 2012 Optimize a model with 7271 rows, 1972 columns and 22488 nonzeros Presolve time: 0.02s Presolved: 7271 rows, 1972 columns, 22488 nonzeros Variable types: 0 continuous, 1972 integer (1972 binary) Root relaxation: objective 0.000000e+00, 277 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 (928 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 06:36:06 2012 Optimize a model with 3703 rows, 1432 columns and 11244 nonzeros Presolve time: 0.01s Presolved: 3703 rows, 1432 columns, 11244 nonzeros Variable types: 0 continuous, 1432 integer (1432 binary) Root relaxation: objective 0.000000e+00, 307 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 253 - 0.00000 - - 0s 0 0 0.00000 0 408 - 0.00000 - - 1s 0 0 0.00000 0 404 - 0.00000 - - 2s 0 0 0.00000 0 404 - 0.00000 - - 2s 0 0 0.00000 0 398 - 0.00000 - - 3s 0 0 0.00000 0 396 - 0.00000 - - 4s 0 0 0.00000 0 392 - 0.00000 - - 6s 0 0 0.00000 0 388 - 0.00000 - - 7s 0 0 0.00000 0 388 - 0.00000 - - 8s 0 0 0.00000 0 385 - 0.00000 - - 9s 0 0 0.00000 0 390 - 0.00000 - - 11s 0 0 0.00000 0 388 - 0.00000 - - 12s 0 0 0.00000 0 387 - 0.00000 - - 13s 0 0 0.00000 0 387 - 0.00000 - - 13s 0 0 0.00000 0 387 - 0.00000 - - 14s 0 2 0.00000 0 387 - 0.00000 - - 15s Cutting planes: Clique: 16 Zero half: 12 Explored 5 nodes (49143 simplex iterations) in 15.26 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 4 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 06:36:21 2012 Optimize a model with 5487 rows, 1702 columns and 16866 nonzeros Presolve time: 0.01s Presolved: 5487 rows, 1702 columns, 16866 nonzeros Variable types: 0 continuous, 1702 integer (1702 binary) Root relaxation: objective 0.000000e+00, 299 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 254 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1388 simplex iterations) in 0.09 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 06:36:21 2012 Optimize a model with 4595 rows, 1567 columns and 14055 nonzeros Presolve time: 0.01s Presolved: 4595 rows, 1567 columns, 14055 nonzeros Variable types: 0 continuous, 1567 integer (1567 binary) Root relaxation: objective 0.000000e+00, 279 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 0 258 - 0.00000 - - 0s 0 0 0.00000 0 271 - 0.00000 - - 0s 0 0 0.00000 0 317 - 0.00000 - - 1s 0 0 0.00000 0 329 - 0.00000 - - 1s 0 0 0.00000 0 350 - 0.00000 - - 2s 0 0 0.00000 0 339 - 0.00000 - - 2s 0 0 0.00000 0 303 - 0.00000 - - 3s 0 0 0.00000 0 300 - 0.00000 - - 4s 0 0 0.00000 0 304 - 0.00000 - - 5s 0 0 0.00000 0 292 - 0.00000 - - 6s 0 0 0.00000 0 303 - 0.00000 - - 6s 0 0 0.00000 0 293 - 0.00000 - - 7s 0 0 0.00000 0 301 - 0.00000 - - 8s 0 0 0.00000 0 301 - 0.00000 - - 8s 0 2 0.00000 0 301 - 0.00000 - - 9s 51 21 0.00000 17 218 - 0.00000 - 200 10s 697 47 infeasible 21 - 0.00000 - 112 15s 906 58 0.00000 26 275 - 0.00000 - 108 20s 909 60 0.00000 14 311 - 0.00000 - 108 26s 911 62 0.00000 28 323 - 0.00000 - 108 30s 996 74 0.00000 29 301 - 0.00000 - 165 35s 1192 54 0.00000 22 323 - 0.00000 - 186 40s 1382 82 infeasible 29 - 0.00000 - 201 45s 1580 100 0.00000 26 307 - 0.00000 - 211 50s 1807 121 0.00000 29 285 - 0.00000 - 217 55s 2009 103 0.00000 26 305 - 0.00000 - 224 60s 2227 119 infeasible 26 - 0.00000 - 227 65s 2437 129 0.00000 26 307 - 0.00000 - 231 70s 2630 118 0.00000 30 317 - 0.00000 - 236 75s 2841 141 infeasible 34 - 0.00000 - 238 80s 3040 130 infeasible 30 - 0.00000 - 241 85s 3243 131 infeasible 26 - 0.00000 - 244 90s 3431 127 0.00000 25 313 - 0.00000 - 246 95s 3626 138 0.00000 27 299 - 0.00000 - 249 100s 3822 138 infeasible 25 - 0.00000 - 251 105s 4025 145 infeasible 25 - 0.00000 - 252 110s 4230 136 0.00000 24 298 - 0.00000 - 253 115s 4428 146 infeasible 26 - 0.00000 - 254 120s 4617 159 infeasible 27 - 0.00000 - 256 125s 4815 155 infeasible 27 - 0.00000 - 257 130s 4985 147 0.00000 23 300 - 0.00000 - 259 135s 5177 149 infeasible 28 - 0.00000 - 261 140s 5362 156 infeasible 34 - 0.00000 - 262 145s 5535 147 infeasible 28 - 0.00000 - 264 150s 5719 147 0.00000 29 318 - 0.00000 - 265 155s 5922 150 infeasible 33 - 0.00000 - 265 160s 6119 153 infeasible 32 - 0.00000 - 266 165s 6306 164 infeasible 29 - 0.00000 - 267 170s 6483 163 0.00000 29 316 - 0.00000 - 268 175s 6678 162 infeasible 27 - 0.00000 - 269 180s 6883 161 0.00000 16 319 - 0.00000 - 269 185s 7053 185 0.00000 31 234 - 0.00000 - 270 190s 7250 198 infeasible 34 - 0.00000 - 270 195s 7452 212 0.00000 27 302 - 0.00000 - 270 200s 7638 220 0.00000 30 312 - 0.00000 - 271 205s 7803 223 0.00000 29 311 - 0.00000 - 272 210s 7995 231 infeasible 30 - 0.00000 - 272 215s 8181 227 infeasible 27 - 0.00000 - 273 220s 8379 243 infeasible 29 - 0.00000 - 273 225s 8550 230 infeasible 24 - 0.00000 - 274 230s 8759 229 0.00000 21 312 - 0.00000 - 274 235s 8942 228 0.00000 31 303 - 0.00000 - 275 240s 9135 259 infeasible 34 - 0.00000 - 275 245s 9319 263 0.00000 25 294 - 0.00000 - 275 250s 9505 267 0.00000 26 306 - 0.00000 - 275 255s 9686 278 infeasible 26 - 0.00000 - 276 260s 9888 278 0.00000 30 313 - 0.00000 - 276 265s 10074 270 0.00000 23 329 - 0.00000 - 276 270s 10260 290 infeasible 26 - 0.00000 - 276 275s 10441 299 0.00000 24 294 - 0.00000 - 277 280s Cutting planes: Gomory: 2 Clique: 6 Zero half: 7 Explored 10491 nodes (2951007 simplex iterations) in 281.17 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: 6