Make show unproved CLI a flag

Author: Leo Alt

docs/smtchecker.rst

@@ -488,7 +488,7 @@ Unproved Targets
 
 If there are any unproved targets, the SMTChecker issues one warning stating
 how many unproved targets there are. If the user wishes to see all the specific
-unproved targets, the CLI option ``--model-checker-show-unproved true`` and
+unproved targets, the CLI option ``--model-checker-show-unproved`` and
 the JSON option ``settings.modelChecker.showUnproved = true`` can be used.
 
 Verified Contracts

solc/CommandLineParser.cpp

@@ -733,8 +733,7 @@ General Information)").c_str(),
 		)
 		(
 			g_strModelCheckerShowUnproved.c_str(),
-			po::value<bool>()->value_name("false,true")->default_value(false),
-			"Select whether to show all unproved targets."
+			"Show all unproved targets separately."
 		)
 		(
 			g_strModelCheckerSolvers.c_str(),
@@ -1114,10 +1113,7 @@ General Information)").c_str(),
 	}
 
 	if (m_args.count(g_strModelCheckerShowUnproved))
-	{
-		bool showUnproved = m_args[g_strModelCheckerShowUnproved].as<bool>();
-		m_options.modelChecker.settings.showUnproved = showUnproved;
-	}
+		m_options.modelChecker.settings.showUnproved = true;
 
 	if (m_args.count(g_strModelCheckerSolvers))
 	{