private static SolverStats SolveAndRecordStats(ISearchAlgorithm <VacuumWorldState, VacuumWorldAction> solver)
{
var stats = new SolverStats();
var stopwatch = Stopwatch.StartNew();
solver.Solve();
stats.TimeToFinish = stopwatch.Elapsed;
stats.NumberOfExploredStates = solver.NumberOfExploredStates;
stats.FoundSolution = solver.IsSolved;
stats.SolutionCost = solver.GetSolution().Count();
return(stats);
}