current bounds on the number of colors: 0 -- 88 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:29 2012 Optimize a model with 8096 rows, 4054 columns and 27896 nonzeros Presolve removed 1 rows and 44 columns Presolve time: 0.05s Presolved: 8095 rows, 4010 columns, 27852 nonzeros Variable types: 0 continuous, 4010 integer (4010 binary) Root relaxation: objective 0.000000e+00, 224 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 (351 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 -- 44 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:29 2012 Optimize a model with 4092 rows, 2118 columns and 13948 nonzeros Presolve removed 1 rows and 22 columns Presolve time: 0.02s Presolved: 4091 rows, 2096 columns, 13926 nonzeros Variable types: 0 continuous, 2096 integer (2096 binary) Root relaxation: objective 0.000000e+00, 213 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 (349 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:30 2012 Optimize a model with 2090 rows, 1150 columns and 6974 nonzeros Presolve removed 1 rows and 11 columns Presolve time: 0.01s Presolved: 2089 rows, 1139 columns, 6963 nonzeros Variable types: 0 continuous, 1139 integer (1139 binary) Root relaxation: objective 0.000000e+00, 195 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 (314 simplex iterations) in 0.01 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:30 2012 Optimize a model with 998 rows, 622 columns and 3170 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 997 rows, 617 columns, 3165 nonzeros Variable types: 0 continuous, 617 integer (617 binary) Root relaxation: objective 0.000000e+00, 201 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 (334 simplex iterations) in 0.01 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 18:22:30 2012 Optimize a model with 452 rows, 358 columns and 1268 nonzeros Presolve removed 88 rows and 89 columns Presolve time: 0.00s Presolved: 364 rows, 269 columns, 1092 nonzeros Variable types: 0 continuous, 269 integer (269 binary) Root relaxation: objective 0.000000e+00, 95 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 87 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (323 simplex iterations) in 0.00 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 18:22:30 2012 Optimize a model with 634 rows, 446 columns and 1902 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 633 rows, 443 columns, 1899 nonzeros Variable types: 0 continuous, 443 integer (443 binary) Root relaxation: objective 0.000000e+00, 195 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 70 - 0.00000 - - 0s 0 0 0.00000 0 103 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 0 0.00000 0 65 - 0.00000 - - 0s 0 0 0.00000 0 76 - 0.00000 - - 0s 0 0 0.00000 0 78 - 0.00000 - - 0s 0 0 0.00000 0 101 - 0.00000 - - 0s 0 0 0.00000 0 74 - 0.00000 - - 0s 0 2 0.00000 0 74 - 0.00000 - - 0s Cutting planes: Zero half: 5 Explored 11 nodes (3735 simplex iterations) in 0.24 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:30 2012 Optimize a model with 816 rows, 534 columns and 2536 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 815 rows, 530 columns, 2532 nonzeros Variable types: 0 continuous, 530 integer (530 binary) Root relaxation: objective 0.000000e+00, 227 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 (345 simplex iterations) in 0.01 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