current bounds on the number of colors: 0 -- 183 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:11:08 2012 Optimize a model with 83448 rows, 17568 columns and 266448 nonzeros Presolve time: 0.26s Presolved: 83448 rows, 17568 columns, 266448 nonzeros Variable types: 0 continuous, 17568 integer (17568 binary) Root relaxation: objective 0.000000e+00, 606 iterations, 0.05 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 (991 simplex iterations) in 0.42 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 -- 91 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:11:10 2012 Optimize a model with 41358 rows, 9150 columns and 131760 nonzeros Presolve time: 0.16s Presolved: 41358 rows, 9150 columns, 131760 nonzeros Variable types: 0 continuous, 9150 integer (9150 binary) Root relaxation: objective 0.000000e+00, 503 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 (893 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 -- 45 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:11:11 2012 Optimize a model with 20313 rows, 4941 columns and 64416 nonzeros Presolve time: 0.08s Presolved: 20313 rows, 4941 columns, 64416 nonzeros Variable types: 0 continuous, 4941 integer (4941 binary) Root relaxation: objective 0.000000e+00, 415 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 (782 simplex iterations) in 0.14 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 -- 22 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:11:11 2012 Optimize a model with 10248 rows, 2928 columns and 32208 nonzeros Presolve time: 0.03s Presolved: 10248 rows, 2928 columns, 32208 nonzeros Variable types: 0 continuous, 2928 integer (2928 binary) Root relaxation: objective 0.000000e+00, 383 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 (721 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:11:11 2012 Optimize a model with 4758 rows, 1830 columns and 14640 nonzeros Presolve time: 0.01s Presolved: 4758 rows, 1830 columns, 14640 nonzeros Variable types: 0 continuous, 1830 integer (1830 binary) Root relaxation: objective 0.000000e+00, 391 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 0 148 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 273 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (10172 simplex iterations) in 0.83 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 Sat Dec 15 02:11:12 2012 Optimize a model with 2013 rows, 1281 columns and 5856 nonzeros Presolve removed 183 rows and 183 columns Presolve time: 0.01s Presolved: 1830 rows, 1098 columns, 5490 nonzeros Variable types: 0 continuous, 1098 integer (1098 binary) Root relaxation: objective 0.000000e+00, 190 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 0 183 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (798 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 Sat Dec 15 02:11:12 2012 Optimize a model with 2928 rows, 1464 columns and 8784 nonzeros Presolve time: 0.01s Presolved: 2928 rows, 1464 columns, 8784 nonzeros Variable types: 0 continuous, 1464 integer (1464 binary) Root relaxation: objective 0.000000e+00, 421 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 0 366 - 0.00000 - - 0s 0 0 0.00000 0 364 - 0.00000 - - 0s 0 0 0.00000 0 500 - 0.00000 - - 1s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 28 Zero half: 1114 Explored 0 nodes (8839 simplex iterations) in 1.35 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 Sat Dec 15 02:11:13 2012 Optimize a model with 3843 rows, 1647 columns and 11712 nonzeros Presolve time: 0.01s Presolved: 3843 rows, 1647 columns, 11712 nonzeros Variable types: 0 continuous, 1647 integer (1647 binary) Root relaxation: objective 0.000000e+00, 425 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 0 356 - 0.00000 - - 0s 0 0 0.00000 0 354 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 0s 0 0 0.00000 0 468 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 1s 0 0 0.00000 0 346 - 0.00000 - - 2s 0 0 0.00000 0 344 - 0.00000 - - 2s 0 0 0.00000 0 344 - 0.00000 - - 3s 0 0 0.00000 0 334 - 0.00000 - - 3s 0 0 0.00000 0 332 - 0.00000 - - 4s 0 0 0.00000 0 328 - 0.00000 - - 4s 0 0 0.00000 0 333 - 0.00000 - - 5s 0 0 0.00000 0 333 - 0.00000 - - 5s 0 2 0.00000 0 333 - 0.00000 - - 5s 327 10 0.00000 14 335 - 0.00000 - 168 10s 701 37 0.00000 19 354 - 0.00000 - 165 15s 706 40 0.00000 18 350 - 0.00000 - 164 20s 709 42 0.00000 12 336 - 0.00000 - 163 26s 711 44 0.00000 12 422 - 0.00000 - 163 30s 715 46 0.00000 12 441 - 0.00000 - 162 36s 800 31 0.00000 26 341 - 0.00000 - 242 40s 998 13 0.00000 27 308 - 0.00000 - 250 45s 1180 7 0.00000 26 429 - 0.00000 - 258 50s Cutting planes: Clique: 2 Zero half: 13 Explored 1280 nodes (377532 simplex iterations) in 52.74 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5