starting the horner heuristic

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

src/math/lp/horner.cpp

@@ -0,0 +1,46 @@
+/*++
+  Copyright (c) 2017 Microsoft Corporation
+
+  Module Name:
+
+  <name>
+
+  Abstract:
+
+  <abstract>
+
+  Author:
+  Nikolaj Bjorner (nbjorner)
+  Lev Nachmanson (levnach)
+
+  Revision History:
+
+
+  --*/
+
+#include "math/lp/horner.h"
+#include "math/lp/nla_core.h"
+
+namespace nla {
+
+horner::horner(core * c) : common(c) {}
+
+void horner::lemma_on_row(const lp::row_strip<rational>&) {}
+
+void horner::horner_lemmas() {
+    if (!c().m_settings.run_horner()) {
+        TRACE("nla_solver", tout << "not generating horner lemmas\n";);
+        return;
+    }
+
+    const auto& m = c().m_lar_solver.A_r();
+    unsigned r = random();
+    unsigned s = m.row_count();
+    for (unsigned i = 0; i < s && !done(); i++) {
+        lemma_on_row(m.m_rows[(i%s)]);
+    }
+    
+    SASSERT(false);
+}
+
+}