Add option --sygus-inv-templ for synthesizing strengthening/weakening of pre/post conditions. Dump synth by default in sygus, update regressions. Set better defaults for induction. Fix bug in related to IFF and EQUAL in sygus grammar.

1 files changed, 29 insertions, 0 deletions

diff --git a/src/theory/quantifiers/options_handlers.h b/src/theory/quantifiers/options_handlers.h
index c518813a0..4d2276621 100644
--- a/src/theory/quantifiers/options_handlers.h
+++ b/src/theory/quantifiers/options_handlers.h
@@ -217,6 +217,19 @@ none \n\
 + Lift if-then-else in quantified formulas. \n\
 \n\
 ";
+static const std::string sygusInvTemplHelp = "\
+Template modes for sygus invariant synthesis, supported by --sygus-inv-templ:\n\
+\n\
+none  \n\
++ Synthesize invariant directly.\n\
+\n\
+pre  \n\
++ Synthesize invariant based on weakening of precondition .\n\
+\n\
+post \n\
++ Synthesize invariant based on strengthening of postcondition. \n\
+\n\
+";
 
 inline InstWhenMode stringToInstWhenMode(std::string option, std::string optarg, SmtEngine* smt) throw(OptionException) {
   if(optarg == "pre-full") {
@@ -443,6 +456,22 @@ inline IteLiftQuantMode stringToIteLiftQuantMode(std::string option, std::string
   }
 }
 
+inline SygusInvTemplMode stringToSygusInvTemplMode(std::string option, std::string optarg, SmtEngine* smt) throw(OptionException) {
+  if(optarg == "none" ) {
+    return SYGUS_INV_TEMPL_MODE_NONE;
+  } else if(optarg == "pre") {
+    return SYGUS_INV_TEMPL_MODE_PRE;
+  } else if(optarg == "post") {
+    return SYGUS_INV_TEMPL_MODE_POST;
+  } else if(optarg ==  "help") {
+    puts(sygusInvTemplHelp.c_str());
+    exit(1);
+  } else {
+    throw OptionException(std::string("unknown option for --sygus-inv-templ: `") +
+                          optarg + "'.  Try --sygus-inv-templ help.");
+  }
+}
+
 }/* CVC4::theory::quantifiers namespace */
 }/* CVC4::theory namespace */
 }/* CVC4 namespace */