current bounds on the number of colors: 0 -- 47 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:48 2012 Optimize a model with 1105 rows, 1127 columns and 4255 nonzeros Presolve removed 7 rows and 161 columns Presolve time: 0.01s Presolved: 1098 rows, 966 columns, 4094 nonzeros Variable types: 0 continuous, 966 integer (966 binary) Root relaxation: objective 0.000000e+00, 76 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 (76 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 -- 23 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:48 2012 Optimize a model with 553 rows, 563 columns and 2035 nonzeros Presolve removed 7 rows and 77 columns Presolve time: 0.00s Presolved: 546 rows, 486 columns, 1958 nonzeros Variable types: 0 continuous, 486 integer (486 binary) Root relaxation: objective 0.000000e+00, 76 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 (76 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:48 2012 Optimize a model with 277 rows, 281 columns and 925 nonzeros Presolve removed 7 rows and 35 columns Presolve time: 0.00s Presolved: 270 rows, 246 columns, 890 nonzeros Variable types: 0 continuous, 246 integer (246 binary) Root relaxation: objective 0.000000e+00, 65 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 (65 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 Fri Dec 14 18:19:48 2012 Optimize a model with 139 rows, 140 columns and 370 nonzeros Presolve removed 47 rows and 54 columns Presolve time: 0.00s Presolved: 92 rows, 86 columns, 276 nonzeros Variable types: 0 continuous, 86 integer (86 binary) Root relaxation: objective 0.000000e+00, 43 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 40 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (148 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 18:19:48 2012 Optimize a model with 185 rows, 187 columns and 555 nonzeros Presolve removed 7 rows and 21 columns Presolve time: 0.00s Presolved: 178 rows, 166 columns, 534 nonzeros Variable types: 0 continuous, 166 integer (166 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 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