current bounds on the number of colors: 0 -- 109 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:43 2012 Optimize a model with 2917 rows, 5938 columns and 14310 nonzeros Presolve removed 40 rows and 2160 columns Presolve time: 0.04s Presolved: 2877 rows, 3778 columns, 12150 nonzeros Variable types: 0 continuous, 3778 integer (3778 binary) Root relaxation: objective 0.000000e+00, 111 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 (111 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 -- 54 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:43 2012 Optimize a model with 1513 rows, 2995 columns and 7155 nonzeros Presolve removed 40 rows and 1080 columns Presolve time: 0.01s Presolved: 1473 rows, 1915 columns, 6075 nonzeros Variable types: 0 continuous, 1915 integer (1915 binary) Root relaxation: objective 0.000000e+00, 111 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 (111 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 -- 27 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:43 2012 Optimize a model with 785 rows, 1469 columns and 3445 nonzeros Presolve removed 40 rows and 520 columns Presolve time: 0.00s Presolved: 745 rows, 949 columns, 2925 nonzeros Variable types: 0 continuous, 949 integer (949 binary) Root relaxation: objective 0.000000e+00, 112 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 (112 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 -- 13 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:43 2012 Optimize a model with 421 rows, 706 columns and 1590 nonzeros Presolve removed 40 rows and 240 columns Presolve time: 0.00s Presolved: 381 rows, 466 columns, 1350 nonzeros Variable types: 0 continuous, 466 integer (466 binary) Root relaxation: objective 0.000000e+00, 102 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 (102 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:43 2012 Optimize a model with 265 rows, 379 columns and 795 nonzeros Presolve removed 40 rows and 120 columns Presolve time: 0.00s Presolved: 225 rows, 259 columns, 675 nonzeros Variable types: 0 continuous, 259 integer (259 binary) Root relaxation: objective 0.000000e+00, 99 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 (99 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:43 2012 Optimize a model with 161 rows, 161 columns and 265 nonzeros Presolve removed 161 rows and 161 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 - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:43 2012 Optimize a model with 213 rows, 270 columns and 530 nonzeros Presolve removed 125 rows and 173 columns Presolve time: 0.00s Presolved: 88 rows, 97 columns, 264 nonzeros Variable types: 0 continuous, 97 integer (97 binary) Root relaxation: objective 0.000000e+00, 33 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 (33 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% optimal solution found: number of colors: 2