current bounds on the number of colors: 0 -- 58 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:09 2012 Optimize a model with 2175 rows, 1755 columns and 8033 nonzeros Presolve removed 5 rows and 145 columns Presolve time: 0.01s Presolved: 2170 rows, 1610 columns, 7888 nonzeros Variable types: 0 continuous, 1610 integer (1610 binary) Root relaxation: objective 0.000000e+00, 100 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 (100 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 -- 29 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:09 2012 Optimize a model with 1080 rows, 885 columns and 3878 nonzeros Presolve removed 5 rows and 70 columns Presolve time: 0.00s Presolved: 1075 rows, 815 columns, 3808 nonzeros Variable types: 0 continuous, 815 integer (815 binary) Root relaxation: objective 0.000000e+00, 107 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 (166 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 -- 14 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:09 2012 Optimize a model with 569 rows, 479 columns and 1939 nonzeros Presolve removed 5 rows and 35 columns Presolve time: 0.00s Presolved: 564 rows, 444 columns, 1904 nonzeros Variable types: 0 continuous, 444 integer (444 binary) Root relaxation: objective 0.000000e+00, 98 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 (98 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 Fri Dec 14 18:20:09 2012 Optimize a model with 277 rows, 247 columns and 831 nonzeros Presolve removed 5 rows and 15 columns Presolve time: 0.00s Presolved: 272 rows, 232 columns, 816 nonzeros Variable types: 0 continuous, 232 integer (232 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 (160 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 Fri Dec 14 18:20:09 2012 Optimize a model with 131 rows, 131 columns and 277 nonzeros Presolve removed 131 rows and 131 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 Fri Dec 14 18:20:09 2012 Optimize a model with 204 rows, 189 columns and 554 nonzeros Presolve removed 58 rows and 63 columns Presolve time: 0.00s Presolved: 146 rows, 126 columns, 438 nonzeros Variable types: 0 continuous, 126 integer (126 binary) Root relaxation: objective 0.000000e+00, 54 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 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (190 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 - optimal solution found: number of colors: 3