// Simple LTS from Lec 9 of Computer-Aided Verification

// RESULT: ?
"ex": A[ X "a" ] & E[ X !"b"];
// RESULT: true
filter(forall, "ex" <=> (s=2));

// RESULT: ?
"ex_lhs": A[ X "a" ]
// RESULT: true
filter(forall, "ex_lhs" <=> (s=2));

// RESULT: ?
"ex_rhs": E[ X !"b"];
// RESULT: true
filter(forall, "ex_rhs" <=> (s=0|s=1|s=2));