merge again

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

scripts/mk_nuget_task.py

@@ -88,7 +88,11 @@ def mk_targets(source_root):
 def mk_icon(source_root):
     mk_dir("out/content")
     shutil.copy(f"{source_root}/resources/icon.jpg", "out/content/icon.jpg")
+<<<<<<< HEAD
 #   shutil.copy(f"{source_root}/src/api/dotnet/README.md", "out/content/README.md")
+=======
+    shutil.copy(f"{source_root}/src/api/dotnet/README.md", "out/content/README.md")
+>>>>>>> bdc40b1f5f83cca22dc1d6c5808e935a3b50176c
 
 
     
@@ -109,6 +113,7 @@ Linux Dependencies:
         <copyright>&#169; Microsoft Corporation. All rights reserved.</copyright>
         <tags>smt constraint solver theorem prover</tags>
         <icon>content/icon.jpg</icon>
+        <readme>content/README.md</readme>
         <projectUrl>https://github.com/Z3Prover/z3</projectUrl>
         <license type="expression">MIT</license>
         <repository type="git" url="{1}" branch="{2}" commit="{3}" />
@@ -118,6 +123,10 @@ Linux Dependencies:
             <group targetFramework=".netstandard2.0" />
         </dependencies>
     </metadata>
+    <files>
+      <file src="content/README.md" target="content/README.md"/>
+      <file src="content/icon.jpg" target="content/icon.jpg"/>
+    </files>
 </package>""".format(version, repo, branch, commit, arch)
     print(contents)
     sym = "sym." if symbols else ""

src/math/lp/int_solver.cpp

@@ -202,7 +202,12 @@ namespace lp {
         if (r == lia_move::undef && should_gomory_cut()) r = local_cut(2, gomory_fn);
 
         if (r == lia_move::undef) r = int_branch(*this)();
-        if (settings().get_cancel_flag()) r = lia_move::undef;        
+        
+        m_cut_vars.reset();
+        if (settings().get_cancel_flag()) 
+            return lia_move::undef;   
+        if (r == lia_move::undef) 
+            r = int_branch(*this)();     
         return r;
     }
 

src/sat/smt/euf_solver.cpp

@@ -141,7 +141,7 @@ namespace euf {
             if (get_config().m_bv_solver == 0)
                 ext = alloc(bv::solver, *this, fid);
             else if (get_config().m_bv_solver == 1)
-                throw default_exception("polysat solver is not integrated");
+                ext = alloc(polysat::solver, *this, fid);
             else if (get_config().m_bv_solver == 2)
                 ext = alloc(intblast::solver, *this);
             else 

src/sat/smt/intblast_solver.cpp

@@ -157,7 +157,6 @@ namespace intblast {
     bool solver::unit_propagate() {
         return add_bound_axioms() || add_predicate_axioms();
     }
-    
     void solver::ensure_translated(expr* e) {
         if (m_translate.get(e->get_id(), nullptr))
             return;
@@ -306,27 +305,6 @@ namespace intblast {
                     }
                 }
 
-                //
-                // Add ground equalities to ensure the model is valid with respect to the current case splits.
-                // This may cause more conflicts than necessary. Instead could use intblast on the base level, but using literal
-                // assignment from complete level.
-                // E.g., force the solver to completely backtrack, check satisfiability using the assignment obtained under a complete assignment.
-                // If intblast is SAT, then force the model and literal assignment on the rest of the literals.
-                // 
-                if (!is_ground(e))
-                    continue;
-                euf::enode* n = ctx.get_enode(e);
-                if (!n)
-                    continue;
-                if (n == n->get_root())
-                    continue;
-                expr* r = n->get_root()->get_expr();
-                es.push_back(m.mk_eq(e, r));
-                r = es.back();
-                if (!visited.is_marked(r) && !is_translated(r)) {
-                    visited.mark(r);
-                    sorted.push_back(r);
-                }
             }
             else if (is_quantifier(e)) {
                 quantifier* q = to_quantifier(e);
@@ -392,8 +370,8 @@ namespace intblast {
             if (nBv2int->get_root() != nxModN->get_root()) {
 	      auto a = eq_internalize(nBv2int, nxModN);
 	      ctx.mark_relevant(a);
-                add_unit(a);
-                return sat::check_result::CR_CONTINUE;
+              add_unit(a);
+              return sat::check_result::CR_CONTINUE;
             }
         }
         return sat::check_result::CR_DONE; 
@@ -505,7 +483,6 @@ namespace intblast {
 
         if (has_bv_sort)
             m_vars.push_back(e);        
-        
         if (m_is_plugin) {
             expr* r = m.mk_app(f, m_args);
             if (has_bv_sort) {
@@ -919,7 +896,7 @@ namespace intblast {
     }
 
     bool solver::add_dep(euf::enode* n, top_sort<euf::enode>& dep) {
-      if (!is_app(n->get_expr()))
+        if (!is_app(n->get_expr()))
             return false;
         app* e = to_app(n->get_expr());
         if (n->num_args() == 0) {
@@ -938,7 +915,6 @@ namespace intblast {
     void solver::add_value_solver(euf::enode* n, model& mdl, expr_ref_vector& values) {
         expr* e = n->get_expr();
         SASSERT(bv.is_bv(e));
-        
         if (bv.is_numeral(e)) {
             values.setx(n->get_root_id(), e);
             return;