add consequence finding to inc-sat-solver

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

src/test/get_consequences.cpp

@@ -0,0 +1,50 @@
+/*++
+Copyright (c) 2016 Microsoft Corporation
+
+--*/
+
+#include "inc_sat_solver.h"
+#include "bv_decl_plugin.h"
+#include "reg_decl_plugins.h"
+#include "ast_pp.h"
+//include 
+
+static expr_ref mk_const(ast_manager& m, char const* name, sort* s) {
+    return expr_ref(m.mk_const(symbol(name), s), m);
+}
+
+static expr_ref mk_bool(ast_manager& m, char const* name) {
+    return expr_ref(m.mk_const(symbol(name), m.mk_bool_sort()), m);
+}
+
+static expr_ref mk_bv(ast_manager& m, char const* name, unsigned sz) {
+    bv_util bv(m);
+    return expr_ref(m.mk_const(symbol(name), bv.mk_sort(sz)), m);
+}
+
+void tst_get_consequences() {
+    ast_manager m;
+    reg_decl_plugins(m);
+    bv_util bv(m);
+    params_ref p;
+
+    ref<solver> solver = mk_inc_sat_solver(m, p);
+    expr_ref a = mk_bool(m, "a"), b = mk_bool(m, "b"), c = mk_bool(m, "c");
+    expr_ref ba = mk_bv(m, "ba", 3), bb = mk_bv(m, "bb", 3), bc = mk_bv(m, "bc", 3);
+
+    solver->assert_expr(m.mk_implies(a, b));
+    solver->assert_expr(m.mk_implies(b, c));
+    expr_ref_vector asms(m), vars(m), conseq(m);
+    asms.push_back(a);
+    vars.push_back(b);
+    vars.push_back(c);
+    vars.push_back(bb);
+    vars.push_back(bc);
+    solver->assert_expr(m.mk_eq(ba, bc));
+    solver->assert_expr(m.mk_eq(bv.mk_numeral(2, 3), ba));
+    solver->get_consequences(asms, vars, conseq);
+
+    std::cout << conseq << "\n";
+    
+
+}

src/test/main.cpp

@@ -228,6 +228,7 @@ int main(int argc, char ** argv) {
     TST(pdr);
     TST_ARGV(ddnf);
     TST(model_evaluator);
+    TST(get_consequences);
     //TST_ARGV(hs);
 }