current bounds on the number of colors: 0 -- 170 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:00:26 2012 Optimize a model with 67320 rows, 15240 columns and 215900 nonzeros Presolve time: 0.20s Presolved: 67320 rows, 15240 columns, 215900 nonzeros Variable types: 0 continuous, 15240 integer (15240 binary) Root relaxation: objective 0.000000e+00, 548 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 (874 simplex iterations) in 0.34 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 21:00:27 2012 Optimize a model with 33350 rows, 7930 columns and 106680 nonzeros Presolve time: 0.14s Presolved: 33350 rows, 7930 columns, 106680 nonzeros Variable types: 0 continuous, 7930 integer (7930 binary) Root relaxation: objective 0.000000e+00, 435 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 (761 simplex iterations) in 0.21 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 21:00:27 2012 Optimize a model with 16760 rows, 4360 columns and 53340 nonzeros Presolve time: 0.06s Presolved: 16760 rows, 4360 columns, 53340 nonzeros Variable types: 0 continuous, 4360 integer (4360 binary) Root relaxation: objective 0.000000e+00, 340 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 (643 simplex iterations) in 0.10 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 21:00:28 2012 Optimize a model with 8070 rows, 2490 columns and 25400 nonzeros Presolve time: 0.02s Presolved: 8070 rows, 2490 columns, 25400 nonzeros Variable types: 0 continuous, 2490 integer (2490 binary) Root relaxation: objective 0.000000e+00, 363 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 (712 simplex iterations) in 0.05 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 21:00:28 2012 Optimize a model with 4120 rows, 1640 columns and 12700 nonzeros Presolve time: 0.01s Presolved: 4120 rows, 1640 columns, 12700 nonzeros Variable types: 0 continuous, 1640 integer (1640 binary) Root relaxation: objective 0.000000e+00, 357 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 0 304 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1986 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 21:00:28 2012 Optimize a model with 1750 rows, 1130 columns and 5080 nonzeros Presolve removed 170 rows and 170 columns Presolve time: 0.00s Presolved: 1580 rows, 960 columns, 4740 nonzeros Variable types: 0 continuous, 960 integer (960 binary) Root relaxation: objective 0.000000e+00, 182 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 0 170 - 0.00000 - - 0s Explored 0 nodes (717 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 21:00:28 2012 Optimize a model with 2540 rows, 1300 columns and 7620 nonzeros Presolve time: 0.01s Presolved: 2540 rows, 1300 columns, 7620 nonzeros Variable types: 0 continuous, 1300 integer (1300 binary) Root relaxation: objective 0.000000e+00, 378 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 0 338 - 0.00000 - - 0s 0 0 0.00000 0 347 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4544 simplex iterations) in 0.44 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 21:00:29 2012 Optimize a model with 3330 rows, 1470 columns and 10160 nonzeros Presolve time: 0.01s Presolved: 3330 rows, 1470 columns, 10160 nonzeros Variable types: 0 continuous, 1470 integer (1470 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 0 318 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 438 - 0.00000 - - 0s 0 0 0.00000 0 427 - 0.00000 - - 0s 0 0 0.00000 0 422 - 0.00000 - - 0s 0 0 0.00000 0 429 - 0.00000 - - 1s 0 0 0.00000 0 431 - 0.00000 - - 1s 0 0 0.00000 0 405 - 0.00000 - - 2s 0 0 0.00000 0 245 - 0.00000 - - 3s 0 0 0.00000 0 409 - 0.00000 - - 3s 0 0 0.00000 0 422 - 0.00000 - - 3s 0 0 0.00000 0 422 - 0.00000 - - 4s 0 2 0.00000 0 422 - 0.00000 - - 4s 6 6 0.00000 4 387 - 0.00000 - 557 5s 860 49 0.00000 19 329 - 0.00000 - 104 10s 1108 60 0.00000 2 298 - 0.00000 - 107 15s 1112 62 0.00000 19 400 - 0.00000 - 106 21s 1114 64 0.00000 17 385 - 0.00000 - 106 25s 1119 67 0.00000 18 382 - 0.00000 - 106 30s 1206 55 infeasible 26 - 0.00000 - 158 35s 1495 25 0.00000 20 290 - 0.00000 - 172 40s 1759 15 infeasible 25 - 0.00000 - 184 45s Cutting planes: Clique: 1 Zero half: 34 Explored 1901 nodes (389708 simplex iterations) in 47.93 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