current bounds on the number of colors: 0 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:17:09 2012 Optimize a model with 15676 rows, 1900 columns and 48150 nonzeros Presolve time: 0.06s Presolved: 15676 rows, 1900 columns, 48150 nonzeros Variable types: 0 continuous, 1900 integer (1900 binary) Root relaxation: objective 0.000000e+00, 123 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 (444 simplex iterations) in 0.11 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 Thu Dec 13 18:17:10 2012 Optimize a model with 7551 rows, 1237 columns and 23112 nonzeros Presolve time: 0.02s Presolved: 7551 rows, 1237 columns, 23112 nonzeros Variable types: 0 continuous, 1237 integer (1237 binary) Root relaxation: objective 0.000000e+00, 105 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 (529 simplex iterations) in 0.05 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 Thu Dec 13 18:17:10 2012 Optimize a model with 3801 rows, 931 columns and 11556 nonzeros Presolve time: 0.01s Presolved: 3801 rows, 931 columns, 11556 nonzeros Variable types: 0 continuous, 931 integer (931 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 0.00000 0 72 - 0.00000 - - 0s 0 0 0.00000 0 64 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2342 simplex iterations) in 0.30 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:17:10 2012 Optimize a model with 5676 rows, 1084 columns and 17334 nonzeros Presolve time: 0.02s Presolved: 5676 rows, 1084 columns, 17334 nonzeros Variable types: 0 continuous, 1084 integer (1084 binary) Root relaxation: objective 0.000000e+00, 109 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 0 0 0.00000 0 28 - 0.00000 - - 0s 0 0 0.00000 0 173 - 0.00000 - - 0s 0 0 0.00000 0 174 - 0.00000 - - 0s 0 0 0.00000 0 106 - 0.00000 - - 1s 0 0 0.00000 0 88 - 0.00000 - - 1s 0 0 0.00000 0 24 - 0.00000 - - 2s 0 0 0.00000 0 117 - 0.00000 - - 2s 0 0 0.00000 0 111 - 0.00000 - - 3s 0 0 0.00000 0 94 - 0.00000 - - 3s 0 0 0.00000 0 124 - 0.00000 - - 4s 0 0 0.00000 0 136 - 0.00000 - - 4s 0 0 0.00000 0 136 - 0.00000 - - 4s 0 2 0.00000 0 136 - 0.00000 - - 5s 560 19 infeasible 17 - 0.00000 - 108 10s 706 30 0.00000 14 136 - 0.00000 - 103 15s 710 33 0.00000 6 140 - 0.00000 - 102 20s 722 37 0.00000 13 172 - 0.00000 - 150 25s 1065 10 infeasible 27 - 0.00000 - 146 30s 1500 7 0.00000 23 124 - 0.00000 - 144 35s Cutting planes: Clique: 33 Zero half: 3 Explored 1608 nodes (262616 simplex iterations) in 35.94 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:17:46 2012 Optimize a model with 6301 rows, 1135 columns and 19260 nonzeros Presolve time: 0.02s Presolved: 6301 rows, 1135 columns, 19260 nonzeros Variable types: 0 continuous, 1135 integer (1135 binary) Root relaxation: objective 0.000000e+00, 110 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 40 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Clique: 35 MIR: 33 Zero half: 29 Explored 0 nodes (1759 simplex iterations) in 0.14 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