current bounds on the number of colors: 0 -- 171 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:16:27 2012 Optimize a model with 68341 rows, 15337 columns and 219045 nonzeros Presolve time: 0.21s Presolved: 68341 rows, 15337 columns, 219045 nonzeros Variable types: 0 continuous, 15337 integer (15337 binary) Root relaxation: objective 0.000000e+00, 683 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 (1277 simplex iterations) in 0.43 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 21:16:28 2012 Optimize a model with 33855 rows, 7984 columns and 108234 nonzeros Presolve time: 0.15s Presolved: 33855 rows, 7984 columns, 108234 nonzeros Variable types: 0 continuous, 7984 integer (7984 binary) Root relaxation: objective 0.000000e+00, 485 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 (860 simplex iterations) in 0.22 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 21:16:29 2012 Optimize a model with 17013 rows, 4393 columns and 54117 nonzeros Presolve time: 0.07s Presolved: 17013 rows, 4393 columns, 54117 nonzeros Variable types: 0 continuous, 4393 integer (4393 binary) Root relaxation: objective 0.000000e+00, 355 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 (675 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 21:16:29 2012 Optimize a model with 8191 rows, 2512 columns and 25770 nonzeros Presolve time: 0.02s Presolved: 8191 rows, 2512 columns, 25770 nonzeros Variable types: 0 continuous, 2512 integer (2512 binary) Root relaxation: objective 0.000000e+00, 355 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 (708 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 21:16:29 2012 Optimize a model with 4181 rows, 1657 columns and 12885 nonzeros Presolve time: 0.01s Presolved: 4181 rows, 1657 columns, 12885 nonzeros Variable types: 0 continuous, 1657 integer (1657 binary) Root relaxation: objective 0.000000e+00, 369 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 0 155 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3464 simplex iterations) in 0.23 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 21:16:29 2012 Optimize a model with 1775 rows, 1144 columns and 5154 nonzeros Presolve removed 171 rows and 171 columns Presolve time: 0.00s Presolved: 1604 rows, 973 columns, 4812 nonzeros Variable types: 0 continuous, 973 integer (973 binary) Root relaxation: objective 0.000000e+00, 183 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 0 171 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (723 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 21:16:30 2012 Optimize a model with 2577 rows, 1315 columns and 7731 nonzeros Presolve time: 0.01s Presolved: 2577 rows, 1315 columns, 7731 nonzeros Variable types: 0 continuous, 1315 integer (1315 binary) Root relaxation: objective 0.000000e+00, 390 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 0 326 - 0.00000 - - 0s 0 0 0.00000 0 470 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 26 Zero half: 531 Explored 0 nodes (7748 simplex iterations) in 0.88 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 21:16:31 2012 Optimize a model with 3379 rows, 1486 columns and 10308 nonzeros Presolve time: 0.01s Presolved: 3379 rows, 1486 columns, 10308 nonzeros Variable types: 0 continuous, 1486 integer (1486 binary) Root relaxation: objective 0.000000e+00, 403 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 0 318 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 438 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 1s 0 0 0.00000 0 256 - 0.00000 - - 1s 0 0 0.00000 0 393 - 0.00000 - - 2s 0 0 0.00000 0 403 - 0.00000 - - 2s 0 0 0.00000 0 378 - 0.00000 - - 3s 0 0 0.00000 0 381 - 0.00000 - - 3s 0 0 0.00000 0 381 - 0.00000 - - 4s 0 2 0.00000 0 381 - 0.00000 - - 4s 56 18 0.00000 8 350 - 0.00000 - 122 5s 605 56 0.00000 21 268 - 0.00000 - 98.2 10s 610 59 0.00000 14 367 - 0.00000 - 97.4 15s 615 62 0.00000 16 295 - 0.00000 - 96.6 20s 845 21 infeasible 21 - 0.00000 - 175 25s 1193 65 infeasible 28 - 0.00000 - 187 30s 1506 72 0.00000 25 292 - 0.00000 - 199 35s 1874 52 0.00000 19 321 - 0.00000 - 201 40s 2206 28 infeasible 22 - 0.00000 - 206 45s 2526 34 0.00000 22 341 - 0.00000 - 210 50s 2870 20 0.00000 24 380 - 0.00000 - 211 55s 3179 9 0.00000 24 292 - 0.00000 - 214 60s 3512 12 infeasible 26 - 0.00000 - 216 65s Cutting planes: Clique: 1 Zero half: 12 Explored 3763 nodes (844200 simplex iterations) in 68.62 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