current bounds on the number of colors: 0 -- 141 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 10:56:18 2012 Optimize a model with 70841 rows, 10880 columns and 221970 nonzeros Presolve time: 0.19s Presolved: 70841 rows, 10880 columns, 221970 nonzeros Variable types: 0 continuous, 10880 integer (10880 binary) Root relaxation: objective 0.000000e+00, 359 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 (769 simplex iterations) in 0.39 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 10:56:19 2012 Optimize a model with 35491 rows, 5945 columns and 110985 nonzeros Presolve time: 0.16s Presolved: 35491 rows, 5945 columns, 110985 nonzeros Variable types: 0 continuous, 5945 integer (5945 binary) Root relaxation: objective 0.000000e+00, 426 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 (805 simplex iterations) in 0.25 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 10:56:20 2012 Optimize a model with 17311 rows, 3407 columns and 53907 nonzeros Presolve time: 0.06s Presolved: 17311 rows, 3407 columns, 53907 nonzeros Variable types: 0 continuous, 3407 integer (3407 binary) Root relaxation: objective 0.000000e+00, 392 iterations, 0.02 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 (796 simplex iterations) in 0.11 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 10:56:20 2012 Optimize a model with 8221 rows, 2138 columns and 25368 nonzeros Presolve time: 0.02s Presolved: 8221 rows, 2138 columns, 25368 nonzeros Variable types: 0 continuous, 2138 integer (2138 binary) Root relaxation: objective 0.000000e+00, 303 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 (810 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 10:56:20 2012 Optimize a model with 4181 rows, 1574 columns and 12684 nonzeros Presolve time: 0.01s Presolved: 4181 rows, 1574 columns, 12684 nonzeros Variable types: 0 continuous, 1574 integer (1574 binary) Root relaxation: objective 0.000000e+00, 301 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 0 210 - 0.00000 - - 0s 0 0 0.00000 0 259 - 0.00000 - - 0s 0 0 0.00000 0 458 - 0.00000 - - 2s 0 0 0.00000 0 465 - 0.00000 - - 2s 0 0 0.00000 0 454 - 0.00000 - - 3s 0 0 0.00000 0 448 - 0.00000 - - 4s 0 0 0.00000 0 445 - 0.00000 - - 5s 0 0 0.00000 0 439 - 0.00000 - - 7s 0 0 0.00000 0 441 - 0.00000 - - 7s 0 0 0.00000 0 443 - 0.00000 - - 8s 0 0 0.00000 0 436 - 0.00000 - - 9s 0 0 0.00000 0 429 - 0.00000 - - 10s 0 0 0.00000 0 447 - 0.00000 - - 11s 0 0 0.00000 0 447 - 0.00000 - - 12s 0 2 0.00000 0 447 - 0.00000 - - 13s Cutting planes: Clique: 14 Zero half: 15 Explored 15 nodes (65751 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 10:56:35 2012 Optimize a model with 6201 rows, 1856 columns and 19026 nonzeros Presolve time: 0.02s Presolved: 6201 rows, 1856 columns, 19026 nonzeros Variable types: 0 continuous, 1856 integer (1856 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 0.00000 0 195 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 45 Zero half: 59 Explored 0 nodes (6040 simplex iterations) in 0.66 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 10:56:35 2012 Optimize a model with 5191 rows, 1715 columns and 15855 nonzeros Presolve time: 0.01s Presolved: 5191 rows, 1715 columns, 15855 nonzeros Variable types: 0 continuous, 1715 integer (1715 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 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 255 - 0.00000 - - 0s 0 0 0.00000 0 370 - 0.00000 - - 2s 0 0 0.00000 0 360 - 0.00000 - - 2s 0 0 0.00000 0 346 - 0.00000 - - 2s 0 0 0.00000 0 376 - 0.00000 - - 2s 0 0 0.00000 0 288 - 0.00000 - - 3s 0 0 0.00000 0 350 - 0.00000 - - 4s 0 0 0.00000 0 223 - 0.00000 - - 6s 0 0 0.00000 0 319 - 0.00000 - - 7s 0 0 0.00000 0 311 - 0.00000 - - 8s 0 0 0.00000 0 326 - 0.00000 - - 9s 0 0 0.00000 0 326 - 0.00000 - - 9s 0 2 0.00000 0 326 - 0.00000 - - 10s 225 30 infeasible 19 - 0.00000 - 196 15s 580 26 infeasible 20 - 0.00000 - 171 20s 907 36 0.00000 3 255 - 0.00000 - 166 25s 911 39 0.00000 4 316 - 0.00000 - 166 30s 914 41 0.00000 5 307 - 0.00000 - 165 35s 917 43 0.00000 21 319 - 0.00000 - 165 41s 946 56 0.00000 22 336 - 0.00000 - 216 45s 1068 19 0.00000 20 350 - 0.00000 - 234 50s 1195 18 infeasible 28 - 0.00000 - 247 55s 1325 36 infeasible 28 - 0.00000 - 257 60s 1455 36 0.00000 26 341 - 0.00000 - 267 65s 1584 33 infeasible 30 - 0.00000 - 274 70s 1708 39 infeasible 25 - 0.00000 - 281 75s 1831 42 0.00000 23 333 - 0.00000 - 287 80s 1936 35 0.00000 26 322 - 0.00000 - 295 85s 2062 43 0.00000 29 338 - 0.00000 - 299 90s 2161 34 0.00000 19 353 - 0.00000 - 306 95s 2278 37 0.00000 28 337 - 0.00000 - 311 100s 2399 32 0.00000 24 319 - 0.00000 - 314 105s 2527 30 0.00000 20 342 - 0.00000 - 317 110s 2651 36 infeasible 26 - 0.00000 - 319 115s 2789 36 0.00000 22 335 - 0.00000 - 320 120s 2917 46 infeasible 30 - 0.00000 - 321 125s 3029 48 infeasible 28 - 0.00000 - 324 130s 3141 54 0.00000 27 358 - 0.00000 - 327 135s 3245 46 0.00000 23 337 - 0.00000 - 330 140s 3350 55 infeasible 29 - 0.00000 - 334 145s 3464 69 infeasible 32 - 0.00000 - 335 150s 3579 68 infeasible 31 - 0.00000 - 337 155s 3683 64 infeasible 28 - 0.00000 - 340 160s 3798 73 0.00000 25 250 - 0.00000 - 341 165s 3908 71 infeasible 25 - 0.00000 - 343 170s 4014 69 infeasible 30 - 0.00000 - 345 175s 4130 75 0.00000 31 328 - 0.00000 - 346 180s 4249 76 0.00000 27 331 - 0.00000 - 347 185s 4366 75 infeasible 26 - 0.00000 - 348 190s 4486 69 infeasible 30 - 0.00000 - 348 195s 4593 76 0.00000 24 358 - 0.00000 - 349 200s 4709 84 0.00000 25 348 - 0.00000 - 350 205s 4817 76 infeasible 34 - 0.00000 - 352 210s 4930 87 0.00000 25 340 - 0.00000 - 353 215s 5040 83 infeasible 34 - 0.00000 - 354 220s 5147 76 infeasible 26 - 0.00000 - 355 225s 5263 78 infeasible 28 - 0.00000 - 356 230s 5367 80 0.00000 23 356 - 0.00000 - 357 235s 5484 89 infeasible 29 - 0.00000 - 357 240s 5602 79 infeasible 20 - 0.00000 - 358 245s 5727 84 infeasible 30 - 0.00000 - 358 250s 5844 81 infeasible 28 - 0.00000 - 359 255s 5975 84 infeasible 27 - 0.00000 - 358 260s 6083 84 0.00000 25 361 - 0.00000 - 359 265s 6196 97 0.00000 26 341 - 0.00000 - 360 270s 6311 98 infeasible 27 - 0.00000 - 360 275s 6435 102 infeasible 29 - 0.00000 - 361 280s Cutting planes: Clique: 10 Zero half: 12 Explored 6458 nodes (2381051 simplex iterations) in 281.10 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