fix(spl): avoid unreachable branch caused by lookupDiscrAux (#888)

Author: Stevengre

kmir/src/kmir/kdist/mir-semantics/symbolic/spl-token.md

@@ -314,13 +314,16 @@ The `#initBorrow` helper resets borrow counters to 0 and sets the correct dynami
     ensures #isSplPubkey(?SplMintKey)
       andBool #isSplPubkey(?SplTokenOwnerKey)
       andBool 0 <=Int ?SplHasDelegateKey andBool ?SplHasDelegateKey <=Int 1
+      andBool (0 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplHasDelegateKey) orBool 1 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplHasDelegateKey))
       andBool #isSplPubkey(?SplDelegateKey)
       andBool 0 <=Int ?SplAmount andBool ?SplAmount <Int (1 <<Int 64)
       andBool 0 <=Int ?SplAccountState andBool ?SplAccountState <=Int 2
       andBool 0 <=Int ?SplDelegatedAmount andBool ?SplDelegatedAmount <Int (1 <<Int 64)
       andBool 0 <=Int ?SplIsNativeLamportsVariant andBool ?SplIsNativeLamportsVariant <=Int 1
+      andBool (0 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplIsNativeLamportsVariant) orBool 1 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplIsNativeLamportsVariant))
       andBool 0 <=Int ?SplIsNativeLamports andBool ?SplIsNativeLamports <Int (1 <<Int 64)
       andBool 0 <=Int ?SplHasCloseAuthKey andBool ?SplHasCloseAuthKey <=Int 1
+      andBool (0 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplHasCloseAuthKey) orBool 1 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplHasCloseAuthKey))
       andBool #isSplPubkey(?SplCloseAuthKey)
     [priority(30), preserves-definedness]
 
@@ -379,8 +382,10 @@ The `#initBorrow` helper resets borrow counters to 0 and sets the correct dynami
     requires #functionName(lookupFunction(#tyOfCall(FUNC))) ==String "spl_token::entrypoint::cheatcode_is_spl_mint"
       orBool #functionName(lookupFunction(#tyOfCall(FUNC))) ==String "cheatcode_is_spl_mint"
     ensures 0 <=Int ?SplMintHasAuthKey andBool ?SplMintHasAuthKey <=Int 1
+      andBool (0 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplMintHasAuthKey) orBool 1 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplMintHasAuthKey))
       andBool #isSplPubkey(?SplMintAuthorityKey)
       andBool 0 <=Int ?SplMintHasFreezeKey andBool ?SplMintHasFreezeKey <=Int 1
+      andBool (0 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplMintHasFreezeKey) orBool 1 ==Int #lookupDiscrAux(discriminant(0) discriminant(1) .Discriminants, ?SplMintHasFreezeKey))
       andBool #isSplPubkey(?SplMintFreezeAuthorityKey)
       andBool 0 <=Int ?SplMintSupply andBool ?SplMintSupply <Int (1 <<Int 64)
       andBool 0 <=Int ?SplMintDecimals andBool ?SplMintDecimals <Int 256