current bounds on the number of colors: 0 -- 87 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:29 2012 Optimize a model with 1807 rows, 3781 columns and 8901 nonzeros Presolve removed 30 rows and 1290 columns Presolve time: 0.02s Presolved: 1777 rows, 2491 columns, 7611 nonzeros Variable types: 0 continuous, 2491 integer (2491 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (89 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 -- 43 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:30 2012 Optimize a model with 927 rows, 1867 columns and 4347 nonzeros Presolve removed 30 rows and 630 columns Presolve time: 0.01s Presolved: 897 rows, 1237 columns, 3717 nonzeros Variable types: 0 continuous, 1237 integer (1237 binary) Root relaxation: objective 0.000000e+00, 88 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 (88 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:30 2012 Optimize a model with 487 rows, 910 columns and 2070 nonzeros Presolve removed 30 rows and 300 columns Presolve time: 0.00s Presolved: 457 rows, 610 columns, 1770 nonzeros Variable types: 0 continuous, 610 integer (610 binary) Root relaxation: objective 0.000000e+00, 88 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 (88 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:30 2012 Optimize a model with 287 rows, 475 columns and 1035 nonzeros Presolve removed 30 rows and 150 columns Presolve time: 0.00s Presolved: 257 rows, 325 columns, 885 nonzeros Variable types: 0 continuous, 325 integer (325 binary) Root relaxation: objective 0.000000e+00, 77 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 (77 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:30 2012 Optimize a model with 167 rows, 214 columns and 414 nonzeros Presolve removed 107 rows and 147 columns Presolve time: 0.00s Presolved: 60 rows, 67 columns, 180 nonzeros Variable types: 0 continuous, 67 integer (67 binary) Root relaxation: objective 0.000000e+00, 22 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 (22 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 16:14:30 2012 Optimize a model with 127 rows, 127 columns and 207 nonzeros Presolve removed 127 rows and 127 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