current bounds on the number of colors: 0 -- 119 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:30:12 2012 Optimize a model with 23129 rows, 7411 columns and 76051 nonzeros Presolve time: 0.13s Presolved: 23129 rows, 7411 columns, 76051 nonzeros Variable types: 0 continuous, 7411 integer (7411 binary) Root relaxation: objective 0.000000e+00, 345 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 (345 simplex iterations) in 0.16 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 -- 59 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:30:12 2012 Optimize a model with 11429 rows, 3841 columns and 37381 nonzeros Presolve time: 0.05s Presolved: 11429 rows, 3841 columns, 37381 nonzeros Variable types: 0 continuous, 3841 integer (3841 binary) Root relaxation: objective 0.000000e+00, 297 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 (510 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 -- 29 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:30:12 2012 Optimize a model with 5579 rows, 2056 columns and 18046 nonzeros Presolve time: 0.02s Presolved: 5579 rows, 2056 columns, 18046 nonzeros Variable types: 0 continuous, 2056 integer (2056 binary) Root relaxation: objective 0.000000e+00, 247 iterations, 0.00 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 (447 simplex iterations) in 0.03 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 -- 14 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:30:13 2012 Optimize a model with 2849 rows, 1223 columns and 9023 nonzeros Presolve time: 0.01s Presolved: 2849 rows, 1223 columns, 9023 nonzeros Variable types: 0 continuous, 1223 integer (1223 binary) Root relaxation: objective 0.000000e+00, 255 iterations, 0.00 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 (474 simplex iterations) in 0.02 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:30:13 2012 Optimize a model with 1289 rows, 747 columns and 3867 nonzeros Presolve time: 0.00s Presolved: 1289 rows, 747 columns, 3867 nonzeros Variable types: 0 continuous, 747 integer (747 binary) Root relaxation: objective 0.000000e+00, 268 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 0 234 - 0.00000 - - 0s 0 0 0.00000 0 230 - 0.00000 - - 0s 0 0 0.00000 0 295 - 0.00000 - - 0s 0 0 0.00000 0 319 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 2 0.00000 0 266 - 0.00000 - - 1s Cutting planes: Zero half: 11 Explored 3 nodes (13043 simplex iterations) in 1.05 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:30:14 2012 Optimize a model with 2069 rows, 985 columns and 6445 nonzeros Presolve time: 0.01s Presolved: 2069 rows, 985 columns, 6445 nonzeros Variable types: 0 continuous, 985 integer (985 binary) Root relaxation: objective 0.000000e+00, 268 iterations, 0.00 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 (715 simplex iterations) in 0.02 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:30:14 2012 Optimize a model with 1679 rows, 866 columns and 5156 nonzeros Presolve time: 0.00s Presolved: 1679 rows, 866 columns, 5156 nonzeros Variable types: 0 continuous, 866 integer (866 binary) Root relaxation: objective 0.000000e+00, 264 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 0 204 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1984 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% optimal solution found: number of colors: 4