current bounds on the number of colors: 0 -- 212 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 14:03:44 2012 Optimize a model with 120840 rows, 23610 columns and 384356 nonzeros Presolve time: 0.42s Presolved: 120840 rows, 23610 columns, 384356 nonzeros Variable types: 0 continuous, 23610 integer (23610 binary) Root relaxation: objective 0.000000e+00, 558 iterations, 0.15 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 (1008 simplex iterations) in 0.73 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 -- 106 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 14:03:46 2012 Optimize a model with 60526 rows, 12374 columns and 192178 nonzeros Presolve time: 0.18s Presolved: 60526 rows, 12374 columns, 192178 nonzeros Variable types: 0 continuous, 12374 integer (12374 binary) Root relaxation: objective 0.000000e+00, 794 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 (1300 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 -- 53 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 14:03:47 2012 Optimize a model with 29800 rows, 6650 columns and 94276 nonzeros Presolve time: 0.12s Presolved: 29800 rows, 6650 columns, 94276 nonzeros Variable types: 0 continuous, 6650 integer (6650 binary) Root relaxation: objective 0.000000e+00, 515 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 (945 simplex iterations) in 0.18 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 -- 26 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 14:03:48 2012 Optimize a model with 15006 rows, 3894 columns and 47138 nonzeros Presolve time: 0.05s Presolved: 15006 rows, 3894 columns, 47138 nonzeros Variable types: 0 continuous, 3894 integer (3894 binary) Root relaxation: objective 0.000000e+00, 436 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 (843 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 -- 13 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 14:03:48 2012 Optimize a model with 7040 rows, 2410 columns and 21756 nonzeros Presolve time: 0.02s Presolved: 7040 rows, 2410 columns, 21756 nonzeros Variable types: 0 continuous, 2410 integer (2410 binary) Root relaxation: objective 0.000000e+00, 471 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 (2790 simplex iterations) in 0.18 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 14:03:48 2012 Optimize a model with 3626 rows, 1774 columns and 10878 nonzeros Presolve time: 0.01s Presolved: 3626 rows, 1774 columns, 10878 nonzeros Variable types: 0 continuous, 1774 integer (1774 binary) Root relaxation: objective 0.000000e+00, 511 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 0 420 - 0.00000 - - 0s 0 0 0.00000 0 420 - 0.00000 - - 0s 0 0 0.00000 0 595 - 0.00000 - - 1s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 76 Zero half: 1505 Explored 0 nodes (9323 simplex iterations) in 1.78 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 14:03:50 2012 Optimize a model with 4764 rows, 1986 columns and 14504 nonzeros Presolve time: 0.01s Presolved: 4764 rows, 1986 columns, 14504 nonzeros Variable types: 0 continuous, 1986 integer (1986 binary) Root relaxation: objective 0.000000e+00, 454 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 0 400 - 0.00000 - - 0s 0 0 0.00000 0 392 - 0.00000 - - 0s 0 0 0.00000 0 402 - 0.00000 - - 1s 0 0 0.00000 0 402 - 0.00000 - - 1s 0 0 0.00000 0 400 - 0.00000 - - 2s 0 0 0.00000 0 398 - 0.00000 - - 3s 0 0 0.00000 0 398 - 0.00000 - - 4s 0 0 0.00000 0 386 - 0.00000 - - 5s 0 0 0.00000 0 380 - 0.00000 - - 6s 0 0 0.00000 0 395 - 0.00000 - - 7s 0 0 0.00000 0 386 - 0.00000 - - 8s 0 0 0.00000 0 376 - 0.00000 - - 9s 0 0 0.00000 0 376 - 0.00000 - - 10s 0 0 0.00000 0 372 - 0.00000 - - 10s 0 0 0.00000 0 383 - 0.00000 - - 11s 0 0 0.00000 0 381 - 0.00000 - - 12s 0 2 0.00000 0 372 - 0.00000 - - 14s 8 6 0.00000 6 513 - 0.00000 - 674 15s 193 39 0.00000 16 513 - 0.00000 - 241 20s 350 68 0.00000 17 457 - 0.00000 - 256 25s 511 75 0.00000 17 384 - 0.00000 - 259 30s 683 79 infeasible 24 - 0.00000 - 258 35s 804 87 0.00000 19 402 - 0.00000 - 264 41s 806 89 0.00000 16 408 - 0.00000 - 263 47s 808 90 0.00000 8 388 - 0.00000 - 262 52s 809 91 0.00000 15 388 - 0.00000 - 262 55s 813 93 0.00000 14 393 - 0.00000 - 261 60s 915 73 infeasible 22 - 0.00000 - 333 65s 1008 53 0.00000 22 398 - 0.00000 - 343 70s 1100 13 infeasible 24 - 0.00000 - 354 75s 1199 8 0.00000 25 510 - 0.00000 - 359 80s Cutting planes: Zero half: 12 Explored 1218 nodes (518422 simplex iterations) in 81.16 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 14:05:11 2012 Optimize a model with 5902 rows, 2198 columns and 18130 nonzeros Presolve time: 0.02s Presolved: 5902 rows, 2198 columns, 18130 nonzeros Variable types: 0 continuous, 2198 integer (2198 binary) Root relaxation: objective 0.000000e+00, 466 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 0 386 - 0.00000 - - 0s 0 0 0.00000 0 390 - 0.00000 - - 0s 0 0 0.00000 0 443 - 0.00000 - - 1s 0 0 0.00000 0 461 - 0.00000 - - 1s 0 0 0.00000 0 478 - 0.00000 - - 2s 0 0 0.00000 0 516 - 0.00000 - - 3s 0 0 0.00000 0 482 - 0.00000 - - 4s 0 2 0.00000 0 482 - 0.00000 - - 5s * 501 1 57 0.0000000 0.00000 0.0% 96.3 8s Cutting planes: Clique: 2 Zero half: 32 Explored 502 nodes (76350 simplex iterations) in 8.73 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% optimal solution found: number of colors: 5