current bounds on the number of colors: 0 -- 82 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:42 2012 Optimize a model with 8036 rows, 3556 columns and 27224 nonzeros Presolve removed 1 rows and 41 columns Presolve time: 0.05s Presolved: 8035 rows, 3515 columns, 27183 nonzeros Variable types: 0 continuous, 3515 integer (3515 binary) Root relaxation: objective 0.000000e+00, 221 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 (363 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:42 2012 Optimize a model with 3962 rows, 1834 columns and 13280 nonzeros Presolve removed 1 rows and 20 columns Presolve time: 0.02s Presolved: 3961 rows, 1814 columns, 13260 nonzeros Variable types: 0 continuous, 1814 integer (1814 binary) Root relaxation: objective 0.000000e+00, 191 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 0.03 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:42 2012 Optimize a model with 2022 rows, 1014 columns and 6640 nonzeros Presolve removed 1 rows and 10 columns Presolve time: 0.01s Presolved: 2021 rows, 1004 columns, 6630 nonzeros Variable types: 0 continuous, 1004 integer (1004 binary) Root relaxation: objective 0.000000e+00, 197 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 (330 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:42 2012 Optimize a model with 1052 rows, 604 columns and 3320 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1051 rows, 599 columns, 3315 nonzeros Variable types: 0 continuous, 599 integer (599 binary) Root relaxation: objective 0.000000e+00, 191 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 (336 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 18:21:42 2012 Optimize a model with 470 rows, 358 columns and 1328 nonzeros Presolve removed 82 rows and 83 columns Presolve time: 0.00s Presolved: 388 rows, 275 columns, 1164 nonzeros Variable types: 0 continuous, 275 integer (275 binary) Root relaxation: objective 0.000000e+00, 89 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 81 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (315 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 18:21:42 2012 Optimize a model with 664 rows, 440 columns and 1992 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 663 rows, 437 columns, 1989 nonzeros Variable types: 0 continuous, 437 integer (437 binary) Root relaxation: objective 0.000000e+00, 186 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 0 136 - 0.00000 - - 0s 0 0 0.00000 0 162 - 0.00000 - - 0s 0 0 0.00000 0 138 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 135 - 0.00000 - - 0s 0 0 0.00000 0 140 - 0.00000 - - 0s 0 0 0.00000 0 166 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 2 0.00000 0 125 - 0.00000 - - 0s Cutting planes: Zero half: 15 Explored 21 nodes (4945 simplex iterations) in 0.22 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 18:21:42 2012 Optimize a model with 858 rows, 522 columns and 2656 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 857 rows, 518 columns, 2652 nonzeros Variable types: 0 continuous, 518 integer (518 binary) Root relaxation: objective 0.000000e+00, 186 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 6 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (578 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