current bounds on the number of colors: 0 -- 73 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:55 2012 Optimize a model with 5797 rows, 2787 columns and 19800 nonzeros Presolve removed 2 rows and 72 columns Presolve time: 0.03s Presolved: 5795 rows, 2715 columns, 19728 nonzeros Variable types: 0 continuous, 2715 integer (2715 binary) Root relaxation: objective 0.000000e+00, 176 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 (293 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% current bounds on the number of colors: 0 -- 36 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:55 2012 Optimize a model with 2935 rows, 1473 columns and 9900 nonzeros Presolve removed 2 rows and 36 columns Presolve time: 0.01s Presolved: 2933 rows, 1437 columns, 9864 nonzeros Variable types: 0 continuous, 1437 integer (1437 binary) Root relaxation: objective 0.000000e+00, 154 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 (263 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:55 2012 Optimize a model with 1504 rows, 816 columns and 4950 nonzeros Presolve removed 2 rows and 18 columns Presolve time: 0.00s Presolved: 1502 rows, 798 columns, 4932 nonzeros Variable types: 0 continuous, 798 integer (798 binary) Root relaxation: objective 0.000000e+00, 166 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 (166 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:55 2012 Optimize a model with 709 rows, 451 columns and 2200 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 707 rows, 443 columns, 2192 nonzeros Variable types: 0 continuous, 443 integer (443 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 (377 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:55 2012 Optimize a model with 391 rows, 305 columns and 1100 nonzeros Presolve removed 73 rows and 75 columns Presolve time: 0.00s Presolved: 318 rows, 230 columns, 954 nonzeros Variable types: 0 continuous, 230 integer (230 binary) Root relaxation: objective 0.000000e+00, 76 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 71 - 0.00000 - - 0s Explored 0 nodes (291 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:55 2012 Optimize a model with 550 rows, 378 columns and 1650 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 548 rows, 372 columns, 1644 nonzeros Variable types: 0 continuous, 372 integer (372 binary) Root relaxation: objective 0.000000e+00, 156 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 90 - 0.00000 - - 0s 0 0 0.00000 0 112 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 0 0.00000 0 77 - 0.00000 - - 0s 0 0 0.00000 0 77 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 81 - 0.00000 - - 0s 0 0 0.00000 0 127 - 0.00000 - - 0s 0 0 0.00000 0 114 - 0.00000 - - 0s 0 2 0.00000 0 112 - 0.00000 - - 0s Cutting planes: Gomory: 1 Zero half: 4 Explored 13 nodes (4868 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4