current bounds on the number of colors: 0 -- 71 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:49 2012 Optimize a model with 4236 rows, 2604 columns and 14980 nonzeros Presolve removed 3 rows and 105 columns Presolve time: 0.03s Presolved: 4233 rows, 2499 columns, 14875 nonzeros Variable types: 0 continuous, 2499 integer (2499 binary) Root relaxation: objective 0.000000e+00, 138 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 (138 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:49 2012 Optimize a model with 2094 rows, 1326 columns and 7276 nonzeros Presolve removed 3 rows and 51 columns Presolve time: 0.01s Presolved: 2091 rows, 1275 columns, 7225 nonzeros Variable types: 0 continuous, 1275 integer (1275 binary) Root relaxation: objective 0.000000e+00, 131 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 (131 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:49 2012 Optimize a model with 1023 rows, 687 columns and 3424 nonzeros Presolve removed 3 rows and 24 columns Presolve time: 0.00s Presolved: 1020 rows, 663 columns, 3400 nonzeros Variable types: 0 continuous, 663 integer (663 binary) Root relaxation: objective 0.000000e+00, 143 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 (224 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:49 2012 Optimize a model with 547 rows, 403 columns and 1712 nonzeros Presolve removed 3 rows and 12 columns Presolve time: 0.00s Presolved: 544 rows, 391 columns, 1700 nonzeros Variable types: 0 continuous, 391 integer (391 binary) Root relaxation: objective 0.000000e+00, 147 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 (228 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:49 2012 Optimize a model with 309 rows, 261 columns and 856 nonzeros Presolve removed 73 rows and 77 columns Presolve time: 0.00s Presolved: 236 rows, 184 columns, 708 nonzeros Variable types: 0 continuous, 184 integer (184 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 0.00000 0 63 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (257 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:49 2012 Optimize a model with 428 rows, 332 columns and 1284 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 425 rows, 323 columns, 1275 nonzeros Variable types: 0 continuous, 323 integer (323 binary) Root relaxation: objective 0.000000e+00, 161 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 (490 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: 3