current bounds on the number of colors: 0 -- 173 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:42 2012 Optimize a model with 13331 rows, 15031 columns and 54352 nonzeros Presolve removed 24 rows and 2064 columns Presolve time: 0.11s Presolved: 13307 rows, 12967 columns, 52288 nonzeros Variable types: 0 continuous, 12967 integer (12967 binary) Root relaxation: objective 0.000000e+00, 262 iterations, 0.01 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 (262 simplex iterations) in 0.12 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 -- 86 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:42 2012 Optimize a model with 6752 rows, 7592 columns and 27176 nonzeros Presolve removed 24 rows and 1032 columns Presolve time: 0.06s Presolved: 6728 rows, 6560 columns, 26144 nonzeros Variable types: 0 continuous, 6560 integer (6560 binary) Root relaxation: objective 0.000000e+00, 265 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 (265 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 -- 43 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:43 2012 Optimize a model with 3386 rows, 3786 columns and 13272 nonzeros Presolve removed 24 rows and 504 columns Presolve time: 0.02s Presolved: 3362 rows, 3282 columns, 12768 nonzeros Variable types: 0 continuous, 3282 integer (3282 binary) Root relaxation: objective 0.000000e+00, 264 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 (264 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:43 2012 Optimize a model with 1703 rows, 1883 columns and 6320 nonzeros Presolve removed 24 rows and 240 columns Presolve time: 0.01s Presolved: 1679 rows, 1643 columns, 6080 nonzeros Variable types: 0 continuous, 1643 integer (1643 binary) Root relaxation: objective 0.000000e+00, 262 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:43 2012 Optimize a model with 938 rows, 1018 columns and 3160 nonzeros Presolve removed 24 rows and 120 columns Presolve time: 0.00s Presolved: 914 rows, 898 columns, 3040 nonzeros Variable types: 0 continuous, 898 integer (898 binary) Root relaxation: objective 0.000000e+00, 238 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 (238 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 16:23:43 2012 Optimize a model with 479 rows, 499 columns and 1264 nonzeros Presolve removed 177 rows and 203 columns Presolve time: 0.00s Presolved: 302 rows, 296 columns, 906 nonzeros Variable types: 0 continuous, 296 integer (296 binary) Root relaxation: objective 0.000000e+00, 167 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 0 132 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (500 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:43 2012 Optimize a model with 632 rows, 672 columns and 1896 nonzeros Presolve removed 24 rows and 72 columns Presolve time: 0.00s Presolved: 608 rows, 600 columns, 1824 nonzeros Variable types: 0 continuous, 600 integer (600 binary) Root relaxation: objective 0.000000e+00, 242 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 (320 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: 3