current bounds on the number of colors: 0 -- 80 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:40:03 2012 Optimize a model with 11840 rows, 3494 columns and 38480 nonzeros Presolve removed 1 rows and 40 columns Presolve time: 0.06s Presolved: 11839 rows, 3454 columns, 38440 nonzeros Variable types: 0 continuous, 3454 integer (3454 binary) Root relaxation: objective 0.000000e+00, 203 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 (360 simplex iterations) in 0.09 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 -- 40 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:40:04 2012 Optimize a model with 5960 rows, 1894 columns and 19240 nonzeros Presolve removed 1 rows and 20 columns Presolve time: 0.02s Presolved: 5959 rows, 1874 columns, 19220 nonzeros Variable types: 0 continuous, 1874 integer (1874 binary) Root relaxation: objective 0.000000e+00, 165 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 (368 simplex iterations) in 0.04 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 Thu Dec 13 19:40:04 2012 Optimize a model with 3020 rows, 1094 columns and 9620 nonzeros Presolve removed 1 rows and 10 columns Presolve time: 0.01s Presolved: 3019 rows, 1084 columns, 9610 nonzeros Variable types: 0 continuous, 1084 integer (1084 binary) Root relaxation: objective 0.000000e+00, 169 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 (310 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:40:04 2012 Optimize a model with 1550 rows, 694 columns and 4810 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1549 rows, 689 columns, 4805 nonzeros Variable types: 0 continuous, 689 integer (689 binary) Root relaxation: objective 0.000000e+00, 163 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 (584 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:40:04 2012 Optimize a model with 668 rows, 454 columns and 1924 nonzeros Presolve removed 80 rows and 81 columns Presolve time: 0.00s Presolved: 588 rows, 373 columns, 1764 nonzeros Variable types: 0 continuous, 373 integer (373 binary) Root relaxation: objective 0.000000e+00, 83 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 79 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (318 simplex iterations) in 0.01 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 Thu Dec 13 19:40:04 2012 Optimize a model with 962 rows, 534 columns and 2886 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 961 rows, 531 columns, 2883 nonzeros Variable types: 0 continuous, 531 integer (531 binary) Root relaxation: objective 0.000000e+00, 169 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 0 156 - 0.00000 - - 0s 0 0 0.00000 0 154 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1554 simplex iterations) in 0.09 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:40:04 2012 Optimize a model with 1256 rows, 614 columns and 3848 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1255 rows, 610 columns, 3844 nonzeros Variable types: 0 continuous, 610 integer (610 binary) Root relaxation: objective 0.000000e+00, 182 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 0 154 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 179 - 0.00000 - - 0s 0 0 0.00000 0 143 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 0s 0 0 0.00000 0 137 - 0.00000 - - 0s 0 0 0.00000 0 134 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 0 0.00000 0 139 - 0.00000 - - 0s 0 0 0.00000 0 139 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Zero half: 14 Explored 0 nodes (9586 simplex iterations) in 0.54 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