current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:57 2012 Optimize a model with 18495 rows, 2141 columns and 56781 nonzeros Presolve time: 0.08s Presolved: 18495 rows, 2141 columns, 56781 nonzeros Variable types: 0 continuous, 2141 integer (2141 binary) Root relaxation: objective 0.000000e+00, 132 iterations, 0.02 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 (300 simplex iterations) in 0.12 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:57 2012 Optimize a model with 8933 rows, 1385 columns and 27339 nonzeros Presolve time: 0.03s Presolved: 8933 rows, 1385 columns, 27339 nonzeros Variable types: 0 continuous, 1385 integer (1385 binary) Root relaxation: objective 0.000000e+00, 124 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 (595 simplex iterations) in 0.07 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:57 2012 Optimize a model with 4152 rows, 1007 columns and 12618 nonzeros Presolve time: 0.01s Presolved: 4152 rows, 1007 columns, 12618 nonzeros Variable types: 0 continuous, 1007 integer (1007 binary) Root relaxation: objective 0.000000e+00, 110 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 56 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2230 simplex iterations) in 0.25 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: 6 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:57 2012 Optimize a model with 6201 rows, 1169 columns and 18927 nonzeros Presolve time: 0.02s Presolved: 6201 rows, 1169 columns, 18927 nonzeros Variable types: 0 continuous, 1169 integer (1169 binary) Root relaxation: objective 0.000000e+00, 114 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 0 0.00000 0 98 - 0.00000 - - 1s 0 0 0.00000 0 134 - 0.00000 - - 2s 0 0 0.00000 0 98 - 0.00000 - - 2s 0 0 0.00000 0 169 - 0.00000 - - 3s 0 0 0.00000 0 179 - 0.00000 - - 3s 0 0 0.00000 0 178 - 0.00000 - - 3s 0 2 0.00000 0 106 - 0.00000 - - 4s 28 18 infeasible 18 - 0.00000 - 168 5s 657 18 infeasible 22 - 0.00000 - 109 10s 817 29 0.00000 11 142 - 0.00000 - 107 15s 821 32 0.00000 17 129 - 0.00000 - 106 20s 825 34 0.00000 6 203 - 0.00000 - 106 25s 888 48 0.00000 29 89 - 0.00000 - 154 30s 1344 11 0.00000 22 123 - 0.00000 - 148 35s 1794 24 0.00000 27 122 - 0.00000 - 145 40s 2258 30 0.00000 23 132 - 0.00000 - 145 45s 2688 22 0.00000 25 119 - 0.00000 - 145 50s 3061 9 infeasible 25 - 0.00000 - 148 55s 3410 10 infeasible 23 - 0.00000 - 151 60s Cutting planes: Clique: 14 Zero half: 1 Explored 3653 nodes (576424 simplex iterations) in 62.88 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: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:30:00 2012 Optimize a model with 7567 rows, 1277 columns and 23133 nonzeros Presolve time: 0.02s Presolved: 7567 rows, 1277 columns, 23133 nonzeros Variable types: 0 continuous, 1277 integer (1277 binary) Root relaxation: objective 0.000000e+00, 118 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 42 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (914 simplex iterations) in 0.08 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:30:01 2012 Optimize a model with 6884 rows, 1223 columns and 21030 nonzeros Presolve time: 0.02s Presolved: 6884 rows, 1223 columns, 21030 nonzeros Variable types: 0 continuous, 1223 integer (1223 binary) Root relaxation: objective 0.000000e+00, 114 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 32 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 48 MIR: 4 Zero half: 44 Explored 0 nodes (2313 simplex iterations) in 0.20 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: 10