current bounds on the number of colors: 0 -- 127 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:10 2012 Optimize a model with 4789 rows, 8075 columns and 21987 nonzeros Presolve removed 35 rows and 2205 columns Presolve time: 0.06s Presolved: 4754 rows, 5870 columns, 19782 nonzeros Variable types: 0 continuous, 5870 integer (5870 binary) Root relaxation: objective 0.000000e+00, 150 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 (150 simplex iterations) in 0.07 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 -- 63 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:11 2012 Optimize a model with 2421 rows, 4011 columns and 10819 nonzeros Presolve removed 35 rows and 1085 columns Presolve time: 0.02s Presolved: 2386 rows, 2926 columns, 9734 nonzeros Variable types: 0 continuous, 2926 integer (2926 binary) Root relaxation: objective 0.000000e+00, 150 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 (150 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 -- 31 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:11 2012 Optimize a model with 1237 rows, 1979 columns and 5235 nonzeros Presolve removed 35 rows and 525 columns Presolve time: 0.01s Presolved: 1202 rows, 1454 columns, 4710 nonzeros Variable types: 0 continuous, 1454 integer (1454 binary) Root relaxation: objective 0.000000e+00, 151 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 (151 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 -- 15 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:11 2012 Optimize a model with 645 rows, 963 columns and 2443 nonzeros Presolve removed 35 rows and 245 columns Presolve time: 0.00s Presolved: 610 rows, 718 columns, 2198 nonzeros Variable types: 0 continuous, 718 integer (718 binary) Root relaxation: objective 0.000000e+00, 147 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 (147 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:11 2012 Optimize a model with 349 rows, 455 columns and 1047 nonzeros Presolve removed 35 rows and 105 columns Presolve time: 0.00s Presolved: 314 rows, 350 columns, 942 nonzeros Variable types: 0 continuous, 350 integer (350 binary) Root relaxation: objective 0.000000e+00, 126 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 (126 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 16:17:11 2012 Optimize a model with 201 rows, 201 columns and 349 nonzeros Presolve removed 201 rows and 201 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 16:17:11 2012 Optimize a model with 275 rows, 328 columns and 698 nonzeros Presolve removed 153 rows and 201 columns Presolve time: 0.00s Presolved: 122 rows, 127 columns, 366 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Root relaxation: objective 0.000000e+00, 60 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 (60 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