current bounds on the number of colors: 0 -- 116 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:28:59 2012 Optimize a model with 21286 rows, 7093 columns and 70238 nonzeros Presolve time: 0.13s Presolved: 21286 rows, 7093 columns, 70238 nonzeros Variable types: 0 continuous, 7093 integer (7093 binary) Root relaxation: objective 0.000000e+00, 346 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 (593 simplex iterations) in 0.17 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 -- 58 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:28:59 2012 Optimize a model with 10701 rows, 3729 columns and 35119 nonzeros Presolve time: 0.05s Presolved: 10701 rows, 3729 columns, 35119 nonzeros Variable types: 0 continuous, 3729 integer (3729 binary) Root relaxation: objective 0.000000e+00, 273 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 (472 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 -- 29 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:29:00 2012 Optimize a model with 5226 rows, 1989 columns and 16954 nonzeros Presolve time: 0.02s Presolved: 5226 rows, 1989 columns, 16954 nonzeros Variable types: 0 continuous, 1989 integer (1989 binary) Root relaxation: objective 0.000000e+00, 242 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 (456 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 18:29:00 2012 Optimize a model with 2671 rows, 1177 columns and 8477 nonzeros Presolve time: 0.01s Presolved: 2671 rows, 1177 columns, 8477 nonzeros Variable types: 0 continuous, 1177 integer (1177 binary) Root relaxation: objective 0.000000e+00, 272 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 (478 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 18:29:00 2012 Optimize a model with 1211 rows, 713 columns and 3633 nonzeros Presolve time: 0.00s Presolved: 1211 rows, 713 columns, 3633 nonzeros Variable types: 0 continuous, 713 integer (713 binary) Root relaxation: objective 0.000000e+00, 284 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 0 208 - 0.00000 - - 0s 0 0 0.00000 0 226 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 251 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 227 - 0.00000 - - 0s 0 2 0.00000 0 227 - 0.00000 - - 0s Cutting planes: Zero half: 18 Explored 3 nodes (10141 simplex iterations) in 0.77 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 18:29:01 2012 Optimize a model with 1941 rows, 945 columns and 6055 nonzeros Presolve time: 0.01s Presolved: 1941 rows, 945 columns, 6055 nonzeros Variable types: 0 continuous, 945 integer (945 binary) Root relaxation: objective 0.000000e+00, 257 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 (692 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 18:29:01 2012 Optimize a model with 1576 rows, 829 columns and 4844 nonzeros Presolve time: 0.00s Presolved: 1576 rows, 829 columns, 4844 nonzeros Variable types: 0 continuous, 829 integer (829 binary) Root relaxation: objective 0.000000e+00, 252 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 52 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1545 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% optimal solution found: number of colors: 4