current bounds on the number of colors: 0 -- 75 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:01 2012 Optimize a model with 1333 rows, 2809 columns and 6549 nonzeros Presolve removed 27 rows and 999 columns Presolve time: 0.01s Presolved: 1306 rows, 1810 columns, 5550 nonzeros Variable types: 0 continuous, 1810 integer (1810 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 -- 37 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:01 2012 Optimize a model with 687 rows, 1384 columns and 3186 nonzeros Presolve removed 27 rows and 486 columns Presolve time: 0.00s Presolved: 660 rows, 898 columns, 2700 nonzeros Variable types: 0 continuous, 898 integer (898 binary) Root relaxation: objective 0.000000e+00, 78 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 (78 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:01 2012 Optimize a model with 381 rows, 709 columns and 1593 nonzeros Presolve removed 27 rows and 243 columns Presolve time: 0.00s Presolved: 354 rows, 466 columns, 1350 nonzeros Variable types: 0 continuous, 466 integer (466 binary) Root relaxation: objective 0.000000e+00, 74 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 (74 simplex iterations) in 0.00 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 Sat Dec 15 16:14:01 2012 Optimize a model with 211 rows, 334 columns and 708 nonzeros Presolve removed 27 rows and 108 columns Presolve time: 0.00s Presolved: 184 rows, 226 columns, 600 nonzeros Variable types: 0 continuous, 226 integer (226 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 simplex iterations) in 0.00 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 Sat Dec 15 16:14:01 2012 Optimize a model with 143 rows, 184 columns and 354 nonzeros Presolve removed 87 rows and 120 columns Presolve time: 0.00s Presolved: 56 rows, 64 columns, 168 nonzeros Variable types: 0 continuous, 64 integer (64 binary) Root relaxation: objective 0.000000e+00, 24 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 (24 simplex iterations) in 0.00 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 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:01 2012 Optimize a model with 109 rows, 109 columns and 177 nonzeros Presolve removed 109 rows and 109 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 2