current bounds on the number of colors: 0 -- 51 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:55 2012 Optimize a model with 1926 rows, 1350 columns and 6900 nonzeros Presolve removed 2 rows and 50 columns Presolve time: 0.01s Presolved: 1924 rows, 1300 columns, 6850 nonzeros Variable types: 0 continuous, 1300 integer (1300 binary) Root relaxation: objective 0.000000e+00, 95 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 (95 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 -- 25 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:55 2012 Optimize a model with 951 rows, 687 columns and 3312 nonzeros Presolve removed 2 rows and 24 columns Presolve time: 0.00s Presolved: 949 rows, 663 columns, 3288 nonzeros Variable types: 0 continuous, 663 integer (663 binary) Root relaxation: objective 0.000000e+00, 102 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 (102 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 -- 12 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:55 2012 Optimize a model with 501 rows, 381 columns and 1656 nonzeros Presolve removed 2 rows and 12 columns Presolve time: 0.00s Presolved: 499 rows, 369 columns, 1644 nonzeros Variable types: 0 continuous, 369 integer (369 binary) Root relaxation: objective 0.000000e+00, 91 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 (91 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:55 2012 Optimize a model with 276 rows, 228 columns and 828 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 274 rows, 222 columns, 822 nonzeros Variable types: 0 continuous, 222 integer (222 binary) Root relaxation: objective 0.000000e+00, 112 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 18 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (285 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 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:55 2012 Optimize a model with 126 rows, 126 columns and 276 nonzeros Presolve removed 126 rows and 126 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 18:19:55 2012 Optimize a model with 201 rows, 177 columns and 552 nonzeros Presolve removed 51 rows and 53 columns Presolve time: 0.00s Presolved: 150 rows, 124 columns, 450 nonzeros Variable types: 0 continuous, 124 integer (124 binary) Root relaxation: objective 0.000000e+00, 55 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 49 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (163 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