current bounds on the number of colors: 0 -- 130 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 01:57:26 2012 Optimize a model with 55965 rows, 9309 columns and 175955 nonzeros Presolve time: 0.17s Presolved: 55965 rows, 9309 columns, 175955 nonzeros Variable types: 0 continuous, 9309 integer (9309 binary) Root relaxation: objective 0.000000e+00, 324 iterations, 0.06 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 (622 simplex iterations) in 0.31 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 -- 65 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 01:57:27 2012 Optimize a model with 27618 rows, 5019 columns and 86624 nonzeros Presolve time: 0.13s Presolved: 27618 rows, 5019 columns, 86624 nonzeros Variable types: 0 continuous, 5019 integer (5019 binary) Root relaxation: objective 0.000000e+00, 322 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 (602 simplex iterations) in 0.19 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 01:57:27 2012 Optimize a model with 13874 rows, 2939 columns and 43312 nonzeros Presolve time: 0.05s Presolved: 13874 rows, 2939 columns, 43312 nonzeros Variable types: 0 continuous, 2939 integer (2939 binary) Root relaxation: objective 0.000000e+00, 290 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 (572 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 01:57:28 2012 Optimize a model with 7002 rows, 1899 columns and 21656 nonzeros Presolve time: 0.02s Presolved: 7002 rows, 1899 columns, 21656 nonzeros Variable types: 0 continuous, 1899 integer (1899 binary) Root relaxation: objective 0.000000e+00, 270 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 (1293 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 01:57:28 2012 Optimize a model with 3566 rows, 1379 columns and 10828 nonzeros Presolve time: 0.01s Presolved: 3566 rows, 1379 columns, 10828 nonzeros Variable types: 0 continuous, 1379 integer (1379 binary) Root relaxation: objective 0.000000e+00, 304 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 0 258 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 0s 0 0 0.00000 0 404 - 0.00000 - - 1s 0 0 0.00000 0 380 - 0.00000 - - 1s 0 0 0.00000 0 378 - 0.00000 - - 2s 0 0 0.00000 0 389 - 0.00000 - - 2s 0 0 0.00000 0 387 - 0.00000 - - 3s 0 0 0.00000 0 383 - 0.00000 - - 4s 0 0 0.00000 0 382 - 0.00000 - - 5s 0 0 0.00000 0 377 - 0.00000 - - 6s 0 0 0.00000 0 385 - 0.00000 - - 7s 0 0 0.00000 0 381 - 0.00000 - - 8s 0 0 0.00000 0 380 - 0.00000 - - 9s 0 0 0.00000 0 380 - 0.00000 - - 10s 0 0 0.00000 0 377 - 0.00000 - - 11s 0 0 0.00000 0 390 - 0.00000 - - 11s 0 0 0.00000 0 390 - 0.00000 - - 12s 0 2 0.00000 0 389 - 0.00000 - - 13s Cutting planes: Clique: 22 Zero half: 19 Explored 21 nodes (50171 simplex iterations) in 14.17 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 01:57:42 2012 Optimize a model with 5284 rows, 1639 columns and 16242 nonzeros Presolve time: 0.01s Presolved: 5284 rows, 1639 columns, 16242 nonzeros Variable types: 0 continuous, 1639 integer (1639 binary) Root relaxation: objective 0.000000e+00, 272 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 0 258 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 350 MIR: 10 Zero half: 422 Explored 0 nodes (4384 simplex iterations) in 0.44 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 01:57:43 2012 Optimize a model with 4425 rows, 1509 columns and 13535 nonzeros Presolve time: 0.01s Presolved: 4425 rows, 1509 columns, 13535 nonzeros Variable types: 0 continuous, 1509 integer (1509 binary) Root relaxation: objective 0.000000e+00, 276 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 0 250 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 1s 0 0 0.00000 0 319 - 0.00000 - - 1s 0 0 0.00000 0 194 - 0.00000 - - 1s 0 0 0.00000 0 245 - 0.00000 - - 2s 0 0 0.00000 0 252 - 0.00000 - - 3s 0 0 0.00000 0 286 - 0.00000 - - 3s 0 0 0.00000 0 286 - 0.00000 - - 4s 0 0 0.00000 0 286 - 0.00000 - - 4s 0 2 0.00000 0 286 - 0.00000 - - 4s 8 8 0.00000 5 303 - 0.00000 - 394 5s 603 109 0.00000 7 216 - 0.00000 - 108 10s 608 113 0.00000 9 273 - 0.00000 - 107 15s 612 115 0.00000 6 281 - 0.00000 - 106 20s 806 125 0.00000 17 306 - 0.00000 - 177 25s 1037 148 infeasible 31 - 0.00000 - 191 30s 1287 166 0.00000 32 269 - 0.00000 - 202 35s 1528 185 infeasible 35 - 0.00000 - 211 40s 1756 193 infeasible 30 - 0.00000 - 219 45s 2007 194 0.00000 23 260 - 0.00000 - 221 50s 2243 220 0.00000 26 286 - 0.00000 - 225 55s 2480 247 infeasible 32 - 0.00000 - 228 60s 2693 260 0.00000 27 268 - 0.00000 - 232 65s 2924 285 0.00000 27 293 - 0.00000 - 234 70s 3141 280 0.00000 30 276 - 0.00000 - 237 75s 3387 298 infeasible 27 - 0.00000 - 238 80s 3586 317 0.00000 22 300 - 0.00000 - 242 85s 3808 327 infeasible 30 - 0.00000 - 244 90s 4047 332 infeasible 28 - 0.00000 - 244 95s 4260 327 0.00000 28 290 - 0.00000 - 246 100s 4476 331 infeasible 25 - 0.00000 - 248 105s 4696 353 infeasible 31 - 0.00000 - 249 110s 4911 352 infeasible 29 - 0.00000 - 250 115s 5159 358 0.00000 27 293 - 0.00000 - 250 120s 5363 342 infeasible 27 - 0.00000 - 252 125s 5588 351 0.00000 27 292 - 0.00000 - 253 130s 5823 352 0.00000 33 228 - 0.00000 - 253 135s 6045 360 infeasible 34 - 0.00000 - 254 140s 6290 383 0.00000 37 268 - 0.00000 - 254 145s 6529 404 0.00000 34 281 - 0.00000 - 254 150s 6765 426 infeasible 38 - 0.00000 - 254 155s 7010 423 infeasible 35 - 0.00000 - 254 160s 7237 436 0.00000 32 292 - 0.00000 - 254 165s 7461 424 infeasible 33 - 0.00000 - 255 170s 7699 428 infeasible 30 - 0.00000 - 255 175s 7903 416 infeasible 31 - 0.00000 - 256 180s 8117 418 0.00000 33 283 - 0.00000 - 256 185s 8351 414 infeasible 28 - 0.00000 - 256 190s 8558 423 0.00000 27 314 - 0.00000 - 257 195s 8777 428 0.00000 34 286 - 0.00000 - 258 200s 8986 419 infeasible 30 - 0.00000 - 258 205s 9243 424 0.00000 32 286 - 0.00000 - 258 210s 9451 434 0.00000 32 234 - 0.00000 - 259 215s 9674 431 0.00000 32 222 - 0.00000 - 259 220s 9895 426 infeasible 27 - 0.00000 - 259 225s 10133 454 0.00000 34 280 - 0.00000 - 259 230s 10357 450 infeasible 33 - 0.00000 - 259 235s 10564 447 infeasible 33 - 0.00000 - 260 240s 10796 442 0.00000 30 260 - 0.00000 - 260 245s 11014 456 0.00000 34 281 - 0.00000 - 260 250s 11258 454 0.00000 28 228 - 0.00000 - 260 255s 11472 446 infeasible 33 - 0.00000 - 260 260s 11696 450 infeasible 37 - 0.00000 - 261 265s 11942 462 infeasible 34 - 0.00000 - 261 270s 12156 448 0.00000 35 298 - 0.00000 - 261 275s 12375 443 infeasible 30 - 0.00000 - 261 280s Cutting planes: Gomory: 1 Clique: 8 Zero half: 15 Explored 12461 nodes (3287508 simplex iterations) in 282.13 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