diff --git a/lib/pdr_context.cpp b/lib/pdr_context.cpp
index 552f8231e..2074e9835 100644
--- a/lib/pdr_context.cpp
+++ b/lib/pdr_context.cpp
@@ -1619,7 +1619,7 @@ namespace pdr {
                 TRACE("pdr", tout << "invariant state: " << (uses_level?"":"(inductive) ") <<  mk_pp(ncube, m) << "\n";);
                 n.pt().add_property(ncube, uses_level?n.level():infty_level);
                 CASSERT("pdr",n.level() == 0 || check_invariant(n.level()-1));
-                m_search.backtrack_level(uses_level && m_params.get_bool(":flexible-trace",true), n);
+                m_search.backtrack_level(uses_level && m_params.get_bool(":flexible-trace",false), n);
                 break;
             }
             case l_undef: {
diff --git a/lib/pdr_dl_interface.cpp b/lib/pdr_dl_interface.cpp
index 85b73e362..4439d571f 100644
--- a/lib/pdr_dl_interface.cpp
+++ b/lib/pdr_dl_interface.cpp
@@ -186,7 +186,7 @@ void dl_interface::collect_params(param_descrs& p) {
     p.insert(":use-farkas", CPK_BOOL, "PDR: (default true) use lemma generator based on Farkas (for linear real arithmetic)");
     p.insert(":generate-proof-trace", CPK_BOOL, "PDR: (default false) trace for 'sat' answer as proof object");
     p.insert(":inline-proofs", CPK_BOOL, "PDR: (default true) run PDR with proof mode turned on and extract Farkas coefficients directly (instead of creating a separate proof object when extracting coefficients)"); 
-    p.insert(":flexible-trace", CPK_BOOL, "PDR: (default true) allow PDR generate long counter-examples by extending candidate trace within search area");
+    p.insert(":flexible-trace", CPK_BOOL, "PDR: (default false) allow PDR generate long counter-examples by extending candidate trace within search area");
     PRIVATE_PARAMS(p.insert(":use-farkas-model", CPK_BOOL, "PDR: (default false) enable using Farkas generalization through model propagation"););
     PRIVATE_PARAMS(p.insert(":use-precondition-generalizer", CPK_BOOL, "PDR: (default false) enable generalizations from weakest pre-conditions"););
     PRIVATE_PARAMS(p.insert(":use-multicore-generalizer", CPK_BOOL, "PDR: (default false) extract multiple cores for blocking states"););