current bounds on the number of colors: 0 -- 159 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:42 2012 Optimize a model with 50324 rows, 13196 columns and 163056 nonzeros Presolve time: 0.17s Presolved: 50324 rows, 13196 columns, 163056 nonzeros Variable types: 0 continuous, 13196 integer (13196 binary) Root relaxation: objective 0.000000e+00, 578 iterations, 0.04 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 (902 simplex iterations) in 0.28 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 -- 79 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:43 2012 Optimize a model with 24924 rows, 6836 columns and 80496 nonzeros Presolve time: 0.13s Presolved: 24924 rows, 6836 columns, 80496 nonzeros Variable types: 0 continuous, 6836 integer (6836 binary) Root relaxation: objective 0.000000e+00, 435 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 (726 simplex iterations) in 0.18 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:43 2012 Optimize a model with 12224 rows, 3656 columns and 39216 nonzeros Presolve time: 0.05s Presolved: 12224 rows, 3656 columns, 39216 nonzeros Variable types: 0 continuous, 3656 integer (3656 binary) Root relaxation: objective 0.000000e+00, 329 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 (597 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:43 2012 Optimize a model with 5874 rows, 2066 columns and 18576 nonzeros Presolve time: 0.02s Presolved: 5874 rows, 2066 columns, 18576 nonzeros Variable types: 0 continuous, 2066 integer (2066 binary) Root relaxation: objective 0.000000e+00, 340 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 (619 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:43 2012 Optimize a model with 2699 rows, 1271 columns and 8256 nonzeros Presolve time: 0.01s Presolved: 2699 rows, 1271 columns, 8256 nonzeros Variable types: 0 continuous, 1271 integer (1271 binary) Root relaxation: objective 0.000000e+00, 372 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 0 304 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 404 - 0.00000 - - 0s 0 0 0.00000 0 263 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 1s 0 0 0.00000 0 371 - 0.00000 - - 1s 0 0 0.00000 0 371 - 0.00000 - - 1s 0 2 0.00000 0 371 - 0.00000 - - 1s 805 140 0.00000 5 282 - 0.00000 - 79.6 5s 813 145 0.00000 19 331 - 0.00000 - 78.8 10s 820 150 0.00000 13 303 - 0.00000 - 78.2 15s * 916 112 24 0.0000000 0.00000 0.0% 134 16s Cutting planes: Clique: 1 Zero half: 8 Explored 917 nodes (138439 simplex iterations) in 16.28 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 19:14:00 2012 Optimize a model with 1429 rows, 953 columns and 4128 nonzeros Presolve removed 159 rows and 159 columns Presolve time: 0.00s Presolved: 1270 rows, 794 columns, 3810 nonzeros Variable types: 0 continuous, 794 integer (794 binary) Root relaxation: objective 0.000000e+00, 172 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 0 159 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (671 simplex iterations) in 0.02 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 19:14:00 2012 Optimize a model with 2064 rows, 1112 columns and 6192 nonzeros Presolve time: 0.01s Presolved: 2064 rows, 1112 columns, 6192 nonzeros Variable types: 0 continuous, 1112 integer (1112 binary) Root relaxation: objective 0.000000e+00, 368 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 0 310 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 380 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 27 Zero half: 367 Explored 0 nodes (6500 simplex iterations) in 0.64 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: 4