diff --git a/chc/cmdline/c_file/cfileutil.py b/chc/cmdline/c_file/cfileutil.py
index d385fac..0253fdc 100644
--- a/chc/cmdline/c_file/cfileutil.py
+++ b/chc/cmdline/c_file/cfileutil.py
@@ -285,6 +285,7 @@ def cfile_report_file(args: argparse.Namespace) -> NoReturn:
     xcfilename: str = args.filename
     opttgtpath: Optional[str] = args.tgtpath
     cshowcode: bool = args.showcode
+    cshowinvariants: bool = args.showinvariants
     cfunctions: Optional[List[str]] = args.functions
     copen: bool = args.open
     jsonoutput: bool = args.json
@@ -334,7 +335,8 @@ def pofilter(po: "CFunctionPO") -> bool:
 
     if cfunctions is None:
         if cshowcode:
-            print(RP.file_code_tostring(cfile, pofilter=pofilter))
+            print(RP.file_code_tostring(
+                cfile, pofilter=pofilter, showinvs=cshowinvariants))
 
         print(RP.file_proofobligation_stats_tostring(cfile))
         exit(0)
@@ -356,6 +358,7 @@ def cfile_run_file(args: argparse.Namespace) -> NoReturn:
     opttgtpath: Optional[str] = args.tgtpath
     cshowcode: bool = args.showcode
     copen: bool = args.open
+    cshowinvariants: bool = args.showinvariants
     jsonoutput: bool = args.json
     outputfile: Optional[str] = args.output
     verbose: bool = args.verbose
@@ -492,7 +495,8 @@ def pofilter(po: "CFunctionPO") -> bool:
             return True
 
     if cshowcode:
-        print(RP.file_code_tostring(cfile, pofilter=pofilter))
+        print(RP.file_code_tostring(
+            cfile, pofilter=pofilter, showinvs=cshowinvariants))
 
     print(RP.file_proofobligation_stats_tostring(cfile))
     exit(0)
diff --git a/chc/cmdline/chkc b/chc/cmdline/chkc
index 1e25f4a..67a3651 100755
--- a/chc/cmdline/chkc
+++ b/chc/cmdline/chkc
@@ -703,6 +703,10 @@ def parse() -> argparse.Namespace:
         "--open",
         action="store_true",
         help="only show open proof obligations")
+    cfilereport.add_argument(
+        "--showinvariants",
+        action="store_true",
+        help="show location invariants on the code")
     cfilereport.add_argument(
         "--json",
         action="store_true",
@@ -742,6 +746,10 @@ def parse() -> argparse.Namespace:
         "--open",
         action="store_true",
         help="only show open proof obligations")
+    cfilerun.add_argument(
+        "--showinvariants",
+        action="store_true",
+        help="show location invariants on the code")
     cfilerun.add_argument(
         "--json",
         action="store_true",
diff --git a/chc/summaries/cchsummaries.jar b/chc/summaries/cchsummaries.jar
index 75aa9f5..a73d685 100644
Binary files a/chc/summaries/cchsummaries.jar and b/chc/summaries/cchsummaries.jar differ