current bounds on the number of colors: 0 -- 123 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:36 2012 Optimize a model with 21717 rows, 7857 columns and 72285 nonzeros Presolve time: 0.12s Presolved: 21717 rows, 7857 columns, 72285 nonzeros Variable types: 0 continuous, 7857 integer (7857 binary) Root relaxation: objective 0.000000e+00, 368 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 (593 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 -- 61 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:36 2012 Optimize a model with 10743 rows, 4044 columns and 35550 nonzeros Presolve time: 0.05s Presolved: 10743 rows, 4044 columns, 35550 nonzeros Variable types: 0 continuous, 4044 integer (4044 binary) Root relaxation: objective 0.000000e+00, 309 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 (519 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 -- 30 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:37 2012 Optimize a model with 5433 rows, 2199 columns and 17775 nonzeros Presolve time: 0.02s Presolved: 5433 rows, 2199 columns, 17775 nonzeros Variable types: 0 continuous, 2199 integer (2199 binary) Root relaxation: objective 0.000000e+00, 260 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 (451 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:37 2012 Optimize a model with 2601 rows, 1215 columns and 8295 nonzeros Presolve time: 0.01s Presolved: 2601 rows, 1215 columns, 8295 nonzeros Variable types: 0 continuous, 1215 integer (1215 binary) Root relaxation: objective 0.000000e+00, 281 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 (502 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 18:31:37 2012 Optimize a model with 1185 rows, 723 columns and 3555 nonzeros Presolve time: 0.00s Presolved: 1185 rows, 723 columns, 3555 nonzeros Variable types: 0 continuous, 723 integer (723 binary) Root relaxation: objective 0.000000e+00, 277 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 0 228 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 237 - 0.00000 - - 0s 0 0 0.00000 0 261 - 0.00000 - - 0s 0 0 0.00000 0 261 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 243 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 2 0.00000 0 184 - 0.00000 - - 0s Cutting planes: Zero half: 34 Explored 21 nodes (13183 simplex iterations) in 0.91 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 18:31:38 2012 Optimize a model with 1893 rows, 969 columns and 5925 nonzeros Presolve time: 0.01s Presolved: 1893 rows, 969 columns, 5925 nonzeros Variable types: 0 continuous, 969 integer (969 binary) Root relaxation: objective 0.000000e+00, 277 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 (790 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 18:31:38 2012 Optimize a model with 1539 rows, 846 columns and 4740 nonzeros Presolve time: 0.00s Presolved: 1539 rows, 846 columns, 4740 nonzeros Variable types: 0 continuous, 846 integer (846 binary) Root relaxation: objective 0.000000e+00, 292 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 (943 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% optimal solution found: number of colors: 4