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diff --git a/src/Test/VeriFuzz/Verilog/Arbitrary.hs b/src/Test/VeriFuzz/Verilog/Arbitrary.hs
deleted file mode 100644
index 1bcb727..0000000
--- a/src/Test/VeriFuzz/Verilog/Arbitrary.hs
+++ /dev/null
@@ -1,184 +0,0 @@
-{-|
-Module      : Test.VeriFuzz.Verilog.Arbitrary
-Description : Arbitrary instances for the AST.
-Copyright   : (c) 2018-2019, Yann Herklotz Grave
-License     : GPL-3
-Maintainer  : ymherklotz [at] gmail [dot] com
-Stability   : experimental
-Portability : POSIX
-
-Arbitrary instances for the AST.
--}
-
-module Test.VeriFuzz.Verilog.Arbitrary where
-
-import           Control.Monad             (replicateM)
-import           Data.Text                 (Text)
-import qualified Data.Text                 as T
-import qualified Test.QuickCheck           as QC
-import           Test.VeriFuzz.Verilog.AST
-
--- Generate Arbitrary instances for the AST
-
-positiveArb :: (QC.Arbitrary a, Ord a, Num a) => QC.Gen a
-positiveArb = QC.suchThat QC.arbitrary (>0)
-
-expr :: Int -> QC.Gen Expr
-expr 0 = QC.oneof
-  [ Id <$> QC.arbitrary
-  , Number <$> positiveArb <*> QC.arbitrary
-  , UnOp <$> QC.arbitrary <*> QC.arbitrary
-  -- , Str <$> QC.arbitrary
-  ]
-expr n
-  | n > 0 = QC.oneof
-    [ Id <$> QC.arbitrary
-    , Number <$> positiveArb <*> QC.arbitrary
-    , Concat <$> QC.listOf1 (subexpr 4)
-    , UnOp <$> QC.arbitrary <*> QC.arbitrary
-    -- , Str <$> QC.arbitrary
-    , BinOp <$> subexpr 2 <*> QC.arbitrary <*> subexpr 2
-    , Cond <$> subexpr 3 <*> subexpr 3 <*> subexpr 3
-    ]
-  | otherwise = expr 0
-  where
-    subexpr y = expr (n `div` y)
-
-statement :: Int -> QC.Gen Stmnt
-statement 0 = QC.oneof
-  [ BlockAssign <$> QC.arbitrary
-  , NonBlockAssign <$> QC.arbitrary
-  -- , StatCA <$> QC.arbitrary
-  , TaskEnable <$> QC.arbitrary
-  , SysTaskEnable <$> QC.arbitrary
-  ]
-statement n
-  | n > 0 = QC.oneof
-    [ TimeCtrl <$> QC.arbitrary <*> (Just <$> substat 2)
-    , SeqBlock <$> QC.listOf1 (substat 4)
-    , BlockAssign <$> QC.arbitrary
-    , NonBlockAssign <$> QC.arbitrary
-    -- , StatCA <$> QC.arbitrary
-    , TaskEnable <$> QC.arbitrary
-    , SysTaskEnable <$> QC.arbitrary
-    ]
-  | otherwise = statement 0
-  where
-    substat y = statement (n `div` y)
-
-modPortGen :: QC.Gen Port
-modPortGen = QC.oneof
-  [ Port Wire <$> positiveArb <*> QC.arbitrary
-  , Port <$> (Reg <$> QC.arbitrary) <*> positiveArb <*> QC.arbitrary
-  ]
-
-instance QC.Arbitrary Text where
-  arbitrary = T.pack <$> QC.arbitrary
-
-instance QC.Arbitrary Identifier where
-  arbitrary = do
-    l <- QC.choose (2, 10)
-    Identifier . T.pack <$> replicateM l (QC.elements ['a'..'z'])
-
-instance QC.Arbitrary BinaryOperator where
-  arbitrary = QC.elements
-    [ BinPlus
-    , BinMinus
-    , BinTimes
-    , BinDiv
-    , BinMod
-    , BinEq
-    , BinNEq
-    , BinCEq
-    , BinCNEq
-    , BinLAnd
-    , BinLOr
-    , BinLT
-    , BinLEq
-    , BinGT
-    , BinGEq
-    , BinAnd
-    , BinOr
-    , BinXor
-    , BinXNor
-    , BinXNorInv
-    , BinPower
-    , BinLSL
-    , BinLSR
-    , BinASL
-    , BinASR
-    ]
-
-instance QC.Arbitrary UnaryOperator where
-  arbitrary = QC.elements
-    [ UnPlus
-    , UnMinus
-    , UnNot
-    , UnAnd
-    , UnNand
-    , UnOr
-    , UnNor
-    , UnXor
-    , UnNxor
-    , UnNxorInv
-    ]
-
-instance QC.Arbitrary PortDir where
-  arbitrary = QC.elements [PortIn, PortOut, PortInOut]
-
-instance QC.Arbitrary PortType where
-  arbitrary = QC.oneof [pure Wire, Reg <$> QC.arbitrary]
-
-instance QC.Arbitrary Port where
-  arbitrary = Port <$> QC.arbitrary <*> positiveArb <*> QC.arbitrary
-
-instance QC.Arbitrary Delay where
-  arbitrary = Delay <$> positiveArb
-
-instance QC.Arbitrary Event where
-  arbitrary = EId <$> QC.arbitrary
-
-instance QC.Arbitrary ModConn where
-  arbitrary = ModConn <$> QC.arbitrary
-
-instance QC.Arbitrary ConstExpr where
-  arbitrary = ConstExpr <$> positiveArb
-
-instance QC.Arbitrary LVal where
-  arbitrary = QC.oneof [ RegId <$> QC.arbitrary
-                       , RegExpr <$> QC.arbitrary <*> QC.arbitrary
-                       , RegSize <$> QC.arbitrary <*> QC.arbitrary <*> QC.arbitrary
-                       ]
-
-instance QC.Arbitrary Assign where
-  arbitrary = Assign <$> QC.arbitrary <*> QC.arbitrary <*> QC.arbitrary
-
-instance QC.Arbitrary Expr where
-  arbitrary = QC.sized expr
-
-instance QC.Arbitrary Stmnt where
-  arbitrary = QC.sized statement
-
-instance QC.Arbitrary ContAssign where
-  arbitrary = ContAssign <$> QC.arbitrary <*> QC.arbitrary
-
-instance QC.Arbitrary Task where
-  arbitrary = Task <$> QC.arbitrary <*> QC.arbitrary
-
-instance QC.Arbitrary ModItem where
-  arbitrary = QC.oneof [ ModCA <$> QC.arbitrary
-                       , ModInst <$> QC.arbitrary <*> QC.arbitrary <*> QC.arbitrary
-                       , Initial <$> QC.arbitrary
-                       , Always <$> (EventCtrl <$> QC.arbitrary <*> QC.arbitrary)
-                       , Decl <$> pure Nothing <*> QC.arbitrary
-                       ]
-
-instance QC.Arbitrary ModDecl where
-  arbitrary = ModDecl <$> QC.arbitrary <*> QC.arbitrary
-              <*> QC.listOf1 modPortGen <*> QC.arbitrary
-
-instance QC.Arbitrary Description where
-  arbitrary = Description <$> QC.arbitrary
-
-instance QC.Arbitrary VerilogSrc where
-  arbitrary = VerilogSrc <$> QC.arbitrary