current bounds on the number of colors: 0 -- 85 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:03 2012 Optimize a model with 8863 rows, 3779 columns and 29904 nonzeros Presolve removed 1 rows and 42 columns Presolve time: 0.05s Presolved: 8862 rows, 3737 columns, 29862 nonzeros Variable types: 0 continuous, 3737 integer (3737 binary) Root relaxation: objective 0.000000e+00, 199 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 (199 simplex iterations) in 0.06 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:03 2012 Optimize a model with 4474 rows, 1994 columns and 14952 nonzeros Presolve removed 1 rows and 21 columns Presolve time: 0.02s Presolved: 4473 rows, 1973 columns, 14931 nonzeros Variable types: 0 continuous, 1973 integer (1973 binary) Root relaxation: objective 0.000000e+00, 200 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 (330 simplex iterations) in 0.03 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 Fri Dec 14 18:22:03 2012 Optimize a model with 2175 rows, 1059 columns and 7120 nonzeros Presolve removed 1 rows and 10 columns Presolve time: 0.01s Presolved: 2174 rows, 1049 columns, 7110 nonzeros Variable types: 0 continuous, 1049 integer (1049 binary) Root relaxation: objective 0.000000e+00, 180 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 (295 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 Fri Dec 14 18:22:03 2012 Optimize a model with 1130 rows, 634 columns and 3560 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1129 rows, 629 columns, 3555 nonzeros Variable types: 0 continuous, 629 integer (629 binary) Root relaxation: objective 0.000000e+00, 206 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 (338 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:03 2012 Optimize a model with 503 rows, 379 columns and 1424 nonzeros Presolve removed 85 rows and 86 columns Presolve time: 0.00s Presolved: 418 rows, 293 columns, 1254 nonzeros Variable types: 0 continuous, 293 integer (293 binary) Root relaxation: objective 0.000000e+00, 93 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 84 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (341 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 Fri Dec 14 18:22:03 2012 Optimize a model with 712 rows, 464 columns and 2136 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 711 rows, 461 columns, 2133 nonzeros Variable types: 0 continuous, 461 integer (461 binary) Root relaxation: objective 0.000000e+00, 203 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 0 100 - 0.00000 - - 0s 0 0 0.00000 0 114 - 0.00000 - - 0s 0 0 0.00000 0 161 - 0.00000 - - 0s 0 0 0.00000 0 175 - 0.00000 - - 0s 0 0 0.00000 0 138 - 0.00000 - - 0s 0 0 0.00000 0 127 - 0.00000 - - 0s 0 0 0.00000 0 127 - 0.00000 - - 0s 0 0 0.00000 0 127 - 0.00000 - - 0s 0 0 0.00000 0 143 - 0.00000 - - 0s 0 0 0.00000 0 153 - 0.00000 - - 0s 0 0 0.00000 0 153 - 0.00000 - - 0s 0 2 0.00000 0 153 - 0.00000 - - 0s Cutting planes: Zero half: 7 Explored 7 nodes (6280 simplex iterations) in 0.28 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:03 2012 Optimize a model with 921 rows, 549 columns and 2848 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 920 rows, 545 columns, 2844 nonzeros Variable types: 0 continuous, 545 integer (545 binary) Root relaxation: objective 0.000000e+00, 197 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 (366 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% optimal solution found: number of colors: 4