current bounds on the number of colors: 0 -- 165 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:00:06 2012 Optimize a model with 56089 rows, 14212 columns and 181302 nonzeros Presolve time: 0.17s Presolved: 56089 rows, 14212 columns, 181302 nonzeros Variable types: 0 continuous, 14212 integer (14212 binary) Root relaxation: objective 0.000000e+00, 611 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 (967 simplex iterations) in 0.30 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 -- 82 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:00:07 2012 Optimize a model with 28127 rows, 7447 columns and 90651 nonzeros Presolve time: 0.14s Presolved: 28127 rows, 7447 columns, 90651 nonzeros Variable types: 0 continuous, 7447 integer (7447 binary) Root relaxation: objective 0.000000e+00, 442 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 (779 simplex iterations) in 0.19 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:00:07 2012 Optimize a model with 13805 rows, 3982 columns and 44220 nonzeros Presolve time: 0.05s Presolved: 13805 rows, 3982 columns, 44220 nonzeros Variable types: 0 continuous, 3982 integer (3982 binary) Root relaxation: objective 0.000000e+00, 335 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 0.08 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:00:08 2012 Optimize a model with 6985 rows, 2332 columns and 22110 nonzeros Presolve time: 0.02s Presolved: 6985 rows, 2332 columns, 22110 nonzeros Variable types: 0 continuous, 2332 integer (2332 binary) Root relaxation: objective 0.000000e+00, 364 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 (874 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 20:00:08 2012 Optimize a model with 3575 rows, 1507 columns and 11055 nonzeros Presolve time: 0.01s Presolved: 3575 rows, 1507 columns, 11055 nonzeros Variable types: 0 continuous, 1507 integer (1507 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1490 simplex iterations) in 0.07 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 20:00:08 2012 Optimize a model with 1529 rows, 1012 columns and 4422 nonzeros Presolve removed 165 rows and 165 columns Presolve time: 0.00s Presolved: 1364 rows, 847 columns, 4092 nonzeros Variable types: 0 continuous, 847 integer (847 binary) Root relaxation: objective 0.000000e+00, 176 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 0 165 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (709 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 20:00:08 2012 Optimize a model with 2211 rows, 1177 columns and 6633 nonzeros Presolve time: 0.01s Presolved: 2211 rows, 1177 columns, 6633 nonzeros Variable types: 0 continuous, 1177 integer (1177 binary) Root relaxation: objective 0.000000e+00, 372 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 0 330 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3816 simplex iterations) in 0.40 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 20:00:09 2012 Optimize a model with 2893 rows, 1342 columns and 8844 nonzeros Presolve time: 0.01s Presolved: 2893 rows, 1342 columns, 8844 nonzeros Variable types: 0 continuous, 1342 integer (1342 binary) Root relaxation: objective 0.000000e+00, 370 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 0 310 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 409 - 0.00000 - - 0s 0 0 0.00000 0 434 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 1s 0 0 0.00000 0 366 - 0.00000 - - 1s 0 0 0.00000 0 364 - 0.00000 - - 2s 0 0 0.00000 0 402 - 0.00000 - - 2s 0 0 0.00000 0 383 - 0.00000 - - 2s 0 2 0.00000 0 383 - 0.00000 - - 3s 611 117 0.00000 11 409 - 0.00000 - 64.1 5s 621 124 0.00000 13 338 - 0.00000 - 63.0 10s 1018 63 0.00000 34 238 - 0.00000 - 112 15s * 1168 3 34 0.0000000 0.00000 0.0% 116 16s Cutting planes: Gomory: 1 Zero half: 12 Explored 1169 nodes (157532 simplex iterations) in 16.09 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% optimal solution found: number of colors: 4