current bounds on the number of colors: 0 -- 141 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 11:06:18 2012 Optimize a model with 69231 rows, 10857 columns and 217140 nonzeros Presolve time: 0.19s Presolved: 69231 rows, 10857 columns, 217140 nonzeros Variable types: 0 continuous, 10857 integer (10857 binary) Root relaxation: objective 0.000000e+00, 368 iterations, 0.08 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 (686 simplex iterations) in 0.36 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 -- 70 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 11:06:19 2012 Optimize a model with 34686 rows, 5922 columns and 108570 nonzeros Presolve time: 0.15s Presolved: 34686 rows, 5922 columns, 108570 nonzeros Variable types: 0 continuous, 5922 integer (5922 binary) Root relaxation: objective 0.000000e+00, 433 iterations, 0.04 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 (825 simplex iterations) in 0.24 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 11:06:20 2012 Optimize a model with 16920 rows, 3384 columns and 52734 nonzeros Presolve time: 0.06s Presolved: 16920 rows, 3384 columns, 52734 nonzeros Variable types: 0 continuous, 3384 integer (3384 binary) Root relaxation: objective 0.000000e+00, 287 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 (601 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: 0 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 11:06:20 2012 Optimize a model with 8037 rows, 2115 columns and 24816 nonzeros Presolve time: 0.02s Presolved: 8037 rows, 2115 columns, 24816 nonzeros Variable types: 0 continuous, 2115 integer (2115 binary) Root relaxation: objective 0.000000e+00, 293 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 (1050 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 11:06:20 2012 Optimize a model with 4089 rows, 1551 columns and 12408 nonzeros Presolve time: 0.01s Presolved: 4089 rows, 1551 columns, 12408 nonzeros Variable types: 0 continuous, 1551 integer (1551 binary) Root relaxation: objective 0.000000e+00, 293 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 0 280 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 433 - 0.00000 - - 1s 0 0 0.00000 0 447 - 0.00000 - - 2s 0 0 0.00000 0 454 - 0.00000 - - 3s 0 0 0.00000 0 440 - 0.00000 - - 3s 0 0 0.00000 0 437 - 0.00000 - - 5s 0 0 0.00000 0 426 - 0.00000 - - 6s 0 0 0.00000 0 421 - 0.00000 - - 8s 0 0 0.00000 0 418 - 0.00000 - - 9s 0 0 0.00000 0 409 - 0.00000 - - 11s 0 0 0.00000 0 417 - 0.00000 - - 13s 0 0 0.00000 0 421 - 0.00000 - - 14s 0 0 0.00000 0 421 - 0.00000 - - 14s 0 2 0.00000 0 421 - 0.00000 - - 16s Cutting planes: Clique: 17 Zero half: 14 Explored 25 nodes (61370 simplex iterations) in 17.31 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 11:06:38 2012 Optimize a model with 6063 rows, 1833 columns and 18612 nonzeros Presolve time: 0.02s Presolved: 6063 rows, 1833 columns, 18612 nonzeros Variable types: 0 continuous, 1833 integer (1833 binary) Root relaxation: objective 0.000000e+00, 289 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 0 147 - 0.00000 - - 0s 0 0 0.00000 0 170 - 0.00000 - - 0s 0 0 0.00000 0 342 - 0.00000 - - 1s 0 0 0.00000 0 393 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 2s Cutting planes: Gomory: 1 Clique: 1 Zero half: 44 Explored 0 nodes (17156 simplex iterations) in 2.07 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 11:06:40 2012 Optimize a model with 5076 rows, 1692 columns and 15510 nonzeros Presolve time: 0.01s Presolved: 5076 rows, 1692 columns, 15510 nonzeros Variable types: 0 continuous, 1692 integer (1692 binary) Root relaxation: objective 0.000000e+00, 296 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 0 280 - 0.00000 - - 0s 0 0 0.00000 0 295 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 390 - 0.00000 - - 1s 0 0 0.00000 0 351 - 0.00000 - - 2s 0 0 0.00000 0 368 - 0.00000 - - 3s 0 0 0.00000 0 372 - 0.00000 - - 4s 0 0 0.00000 0 332 - 0.00000 - - 5s 0 0 0.00000 0 364 - 0.00000 - - 6s 0 0 0.00000 0 364 - 0.00000 - - 7s 0 2 0.00000 0 364 - 0.00000 - - 8s 101 49 0.00000 19 305 - 0.00000 - 192 10s 603 125 0.00000 18 254 - 0.00000 - 124 16s 606 127 0.00000 27 331 - 0.00000 - 124 20s 610 130 0.00000 24 200 - 0.00000 - 123 26s 613 132 0.00000 19 228 - 0.00000 - 122 31s 618 135 0.00000 10 342 - 0.00000 - 217 35s 658 146 infeasible 28 - 0.00000 - 221 40s 785 123 infeasible 26 - 0.00000 - 241 45s 918 91 0.00000 21 341 - 0.00000 - 257 50s 1090 72 infeasible 22 - 0.00000 - 261 55s 1224 68 infeasible 25 - 0.00000 - 269 60s 1368 64 0.00000 20 340 - 0.00000 - 277 65s 1545 123 infeasible 34 - 0.00000 - 274 70s 1689 139 infeasible 30 - 0.00000 - 279 75s 1829 149 0.00000 26 319 - 0.00000 - 283 80s 1973 157 0.00000 28 299 - 0.00000 - 287 85s 2115 175 infeasible 27 - 0.00000 - 291 90s 2245 185 0.00000 25 312 - 0.00000 - 296 95s 2398 194 infeasible 30 - 0.00000 - 298 100s 2573 207 infeasible 32 - 0.00000 - 297 105s 2722 212 infeasible 28 - 0.00000 - 300 110s 2877 207 infeasible 27 - 0.00000 - 302 115s 3022 206 0.00000 25 345 - 0.00000 - 305 120s 3149 213 infeasible 29 - 0.00000 - 308 125s 3332 234 infeasible 29 - 0.00000 - 307 130s 3523 225 infeasible 30 - 0.00000 - 306 135s 3684 212 infeasible 24 - 0.00000 - 308 140s 3812 206 infeasible 29 - 0.00000 - 311 145s 3972 204 infeasible 27 - 0.00000 - 312 150s 4109 211 0.00000 27 323 - 0.00000 - 314 155s 4259 217 infeasible 28 - 0.00000 - 315 160s 4426 222 0.00000 29 236 - 0.00000 - 315 165s 4559 217 0.00000 21 307 - 0.00000 - 317 170s 4692 218 infeasible 31 - 0.00000 - 319 175s 4828 206 0.00000 26 321 - 0.00000 - 321 180s 4977 201 infeasible 26 - 0.00000 - 322 185s 5140 230 infeasible 33 - 0.00000 - 321 190s 5299 261 infeasible 36 - 0.00000 - 321 195s 5467 281 infeasible 28 - 0.00000 - 321 200s 5639 288 infeasible 29 - 0.00000 - 321 205s 5783 290 infeasible 34 - 0.00000 - 321 210s 5940 291 0.00000 27 324 - 0.00000 - 322 215s 6103 296 infeasible 33 - 0.00000 - 321 220s 6276 299 infeasible 34 - 0.00000 - 321 225s 6460 319 infeasible 37 - 0.00000 - 320 230s 6642 323 infeasible 36 - 0.00000 - 320 235s 6795 320 infeasible 34 - 0.00000 - 320 240s 6957 348 infeasible 31 - 0.00000 - 319 245s 7107 368 0.00000 26 305 - 0.00000 - 320 250s 7265 374 infeasible 30 - 0.00000 - 320 255s 7397 384 infeasible 29 - 0.00000 - 321 260s 7556 401 0.00000 26 310 - 0.00000 - 321 265s 7702 397 0.00000 28 323 - 0.00000 - 321 270s 7843 396 0.00000 27 316 - 0.00000 - 322 275s Cutting planes: Gomory: 1 Clique: 2 Zero half: 5 Explored 7897 nodes (2580608 simplex iterations) in 276.67 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