current bounds on the number of colors: 0 -- 171 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:25:19 2012 Optimize a model with 64601 rows, 15293 columns and 207825 nonzeros Presolve time: 0.20s Presolved: 64601 rows, 15293 columns, 207825 nonzeros Variable types: 0 continuous, 15293 integer (15293 binary) Root relaxation: objective 0.000000e+00, 715 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 (1144 simplex iterations) in 0.37 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 -- 85 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:25:20 2012 Optimize a model with 32007 rows, 7940 columns and 102690 nonzeros Presolve time: 0.14s Presolved: 32007 rows, 7940 columns, 102690 nonzeros Variable types: 0 continuous, 7940 integer (7940 binary) Root relaxation: objective 0.000000e+00, 539 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 (938 simplex iterations) in 0.22 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:25:21 2012 Optimize a model with 16089 rows, 4349 columns and 51345 nonzeros Presolve time: 0.06s Presolved: 16089 rows, 4349 columns, 51345 nonzeros Variable types: 0 continuous, 4349 integer (4349 binary) Root relaxation: objective 0.000000e+00, 403 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 (706 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:25:21 2012 Optimize a model with 7751 rows, 2468 columns and 24450 nonzeros Presolve time: 0.02s Presolved: 7751 rows, 2468 columns, 24450 nonzeros Variable types: 0 continuous, 2468 integer (2468 binary) Root relaxation: objective 0.000000e+00, 366 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 (676 simplex iterations) in 0.04 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:25:21 2012 Optimize a model with 3961 rows, 1613 columns and 12225 nonzeros Presolve time: 0.01s Presolved: 3961 rows, 1613 columns, 12225 nonzeros Variable types: 0 continuous, 1613 integer (1613 binary) Root relaxation: objective 0.000000e+00, 376 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 (1998 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:25:21 2012 Optimize a model with 1687 rows, 1100 columns and 4890 nonzeros Presolve removed 171 rows and 171 columns Presolve time: 0.00s Presolved: 1516 rows, 929 columns, 4548 nonzeros Variable types: 0 continuous, 929 integer (929 binary) Root relaxation: objective 0.000000e+00, 174 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 0 171 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (724 simplex iterations) in 0.02 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: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:25:21 2012 Optimize a model with 2445 rows, 1271 columns and 7335 nonzeros Presolve time: 0.01s Presolved: 2445 rows, 1271 columns, 7335 nonzeros Variable types: 0 continuous, 1271 integer (1271 binary) Root relaxation: objective 0.000000e+00, 395 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 0 332 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 0s 0 0 0.00000 0 449 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 23 Clique: 1 Zero half: 438 Explored 0 nodes (7350 simplex iterations) in 0.90 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:25:22 2012 Optimize a model with 3203 rows, 1442 columns and 9780 nonzeros Presolve time: 0.01s Presolved: 3203 rows, 1442 columns, 9780 nonzeros Variable types: 0 continuous, 1442 integer (1442 binary) Root relaxation: objective 0.000000e+00, 384 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 0 330 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 362 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 290 - 0.00000 - - 1s 0 0 0.00000 0 274 - 0.00000 - - 1s 0 0 0.00000 0 274 - 0.00000 - - 1s 0 0 0.00000 0 262 - 0.00000 - - 2s 0 0 0.00000 0 265 - 0.00000 - - 2s 0 0 0.00000 0 198 - 0.00000 - - 2s 0 0 0.00000 0 216 - 0.00000 - - 2s 0 0 0.00000 0 232 - 0.00000 - - 2s 0 0 0.00000 0 231 - 0.00000 - - 3s 0 2 0.00000 0 230 - 0.00000 - - 3s 454 114 0.00000 19 278 - 0.00000 - 81.2 5s 610 150 0.00000 17 262 - 0.00000 - 79.9 10s 615 153 0.00000 13 339 - 0.00000 - 79.2 15s 980 157 0.00000 32 367 - 0.00000 - 153 20s 1531 191 0.00000 28 284 - 0.00000 - 156 25s 2131 263 infeasible 31 - 0.00000 - 154 30s 2690 306 0.00000 28 349 - 0.00000 - 156 35s 3330 348 infeasible 33 - 0.00000 - 154 40s 3968 348 0.00000 28 276 - 0.00000 - 153 45s 4506 334 infeasible 29 - 0.00000 - 155 50s 5046 324 0.00000 28 318 - 0.00000 - 156 55s 5565 283 infeasible 32 - 0.00000 - 158 60s 6156 292 0.00000 34 278 - 0.00000 - 158 65s 6754 258 infeasible 34 - 0.00000 - 158 70s 7278 238 infeasible 29 - 0.00000 - 159 75s 7800 226 infeasible 30 - 0.00000 - 160 80s 8356 246 0.00000 30 284 - 0.00000 - 160 85s 8938 254 infeasible 30 - 0.00000 - 160 90s 9508 264 0.00000 31 292 - 0.00000 - 160 95s 10098 294 0.00000 33 274 - 0.00000 - 160 100s 10671 281 0.00000 32 270 - 0.00000 - 160 105s 11275 323 0.00000 33 274 - 0.00000 - 160 110s 11893 382 infeasible 33 - 0.00000 - 159 115s 12489 398 infeasible 33 - 0.00000 - 159 120s 13121 432 0.00000 34 309 - 0.00000 - 159 125s 13730 503 infeasible 34 - 0.00000 - 158 130s 14356 505 0.00000 34 258 - 0.00000 - 158 135s 14958 527 infeasible 35 - 0.00000 - 158 140s 15531 528 0.00000 30 288 - 0.00000 - 158 145s 16112 521 infeasible 29 - 0.00000 - 158 150s 16756 511 infeasible 30 - 0.00000 - 158 155s 17313 518 0.00000 31 280 - 0.00000 - 158 160s 17932 511 infeasible 32 - 0.00000 - 158 165s 18523 500 infeasible 32 - 0.00000 - 158 170s 19099 480 infeasible 34 - 0.00000 - 158 175s 19567 528 infeasible 36 - 0.00000 - 159 180s 20067 564 infeasible 31 - 0.00000 - 159 185s 20560 595 infeasible 37 - 0.00000 - 160 190s 21115 598 infeasible 35 - 0.00000 - 160 195s 21619 616 0.00000 36 290 - 0.00000 - 160 200s 22233 644 0.00000 31 282 - 0.00000 - 160 205s 22744 655 infeasible 36 - 0.00000 - 161 210s 23289 658 0.00000 33 290 - 0.00000 - 161 215s 23959 682 infeasible 36 - 0.00000 - 160 220s 24537 654 0.00000 35 274 - 0.00000 - 160 225s 25020 669 0.00000 36 319 - 0.00000 - 161 230s 25577 662 0.00000 28 286 - 0.00000 - 161 235s 26203 670 0.00000 29 290 - 0.00000 - 160 240s 26809 648 infeasible 33 - 0.00000 - 160 245s 27315 674 infeasible 37 - 0.00000 - 161 250s 27891 676 infeasible 36 - 0.00000 - 161 255s 28469 712 infeasible 36 - 0.00000 - 161 260s 29002 721 0.00000 32 350 - 0.00000 - 161 265s 29542 703 infeasible 39 - 0.00000 - 161 270s 30095 721 infeasible 37 - 0.00000 - 161 275s 30639 741 infeasible 37 - 0.00000 - 161 280s 31214 728 infeasible 36 - 0.00000 - 161 285s 31742 733 0.00000 34 358 - 0.00000 - 161 290s 32231 728 infeasible 35 - 0.00000 - 162 295s Cutting planes: Clique: 1 Zero half: 2 Explored 32263 nodes (5250412 simplex iterations) in 295.26 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: 5