// bugfix: SimpleLTL.simplify() requires that the formula is a tree, i.e., no sharing of subtrees.
// Fix (SVN rev: 10894) ensures that SimpleLTL is a tree (regression due to rev 10565).
// Without the fix, the Pmin formula has result 1.0.
//
// Model: two_dice.nm

// RESULT: 0.0
Pmax=?[ (X (s1=7)) | (X (X s1=7)) ]

// RESULT: 0.0
Pmin=?[ (X (s1=7)) | (X (X s1=7)) ]