Head

GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/theory/strings/inference_manager.cpp	Lines:	155	179	86.6 %
Date:	2021-09-15	Branches:	343	772	44.4 %


/******************************************************************************
 * Top contributors (to current version):
 *   Andrew Reynolds, Gereon Kremer, Mudathir Mohamed
 *
 * This file is part of the cvc5 project.
 *
 * Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
 * in the top-level source directory and their institutional affiliations.
 * All rights reserved.  See the file COPYING in the top-level source
 * directory for licensing information.
 * ****************************************************************************
 *
 * Implementation of the inference manager for the theory of strings.
 */

#include "theory/strings/inference_manager.h"

#include "options/strings_options.h"
#include "theory/ext_theory.h"
#include "theory/rewriter.h"
#include "theory/strings/theory_strings_utils.h"
#include "theory/strings/word.h"
#include "util/rational.h"

using namespace std;
using namespace cvc5::context;
using namespace cvc5::kind;

namespace cvc5 {
namespace theory {
namespace strings {

InferenceManager::InferenceManager(Env& env,
                                   Theory& t,
                                   SolverState& s,
                                   TermRegistry& tr,
                                   ExtTheory& e,
                                   SequencesStatistics& statistics,
                                   ProofNodeManager* pnm)
    : InferenceManagerBuffered(env, t, s, pnm, "theory::strings::", false),
      d_state(s),
      d_termReg(tr),
      d_extt(e),
      d_statistics(statistics),
      d_ipc(pnm ? new InferProofCons(context(), pnm, d_statistics) : nullptr)
{
  NodeManager* nm = NodeManager::currentNM();
  d_zero = nm->mkConst(Rational(0));
  d_one = nm->mkConst(Rational(1));
  d_true = nm->mkConst(true);
  d_false = nm->mkConst(false);
}

void InferenceManager::doPending()
{
  doPendingFacts();
  if (d_state.isInConflict())
  {
    // just clear the pending vectors, nothing else to do
    clearPendingLemmas();
    clearPendingPhaseRequirements();
    return;
  }
  doPendingLemmas();
  doPendingPhaseRequirements();
}

bool InferenceManager::sendInternalInference(std::vector<Node>& exp,
                                             Node conc,
                                             InferenceId infer)
{
  if (conc.getKind() == AND
      || (conc.getKind() == NOT && conc[0].getKind() == OR))
  {
    Node conj = conc.getKind() == AND ? conc : conc[0];
    bool pol = conc.getKind() == AND;
    bool ret = true;
    for (const Node& cc : conj)
    {
      bool retc = sendInternalInference(exp, pol ? cc : cc.negate(), infer);
      ret = ret && retc;
    }
    return ret;
  }
  bool pol = conc.getKind() != NOT;
  Node lit = pol ? conc : conc[0];
  if (lit.getKind() == EQUAL)
  {
    for (unsigned i = 0; i < 2; i++)
    {
      if (!lit[i].isConst() && !d_state.hasTerm(lit[i]))
      {
        // introduces a new non-constant term, do not infer
        return false;
      }
    }
    // does it already hold?
    if (pol ? d_state.areEqual(lit[0], lit[1])
            : d_state.areDisequal(lit[0], lit[1]))
    {
      return true;
    }
  }
  else if (lit.isConst())
  {
    if (lit.getConst<bool>())
    {
      Assert(pol);
      // trivially holds
      return true;
    }
  }
  else if (!d_state.hasTerm(lit))
  {
    // introduces a new non-constant term, do not infer
    return false;
  }
  else if (d_state.areEqual(lit, pol ? d_true : d_false))
  {
    // already holds
    return true;
  }
  sendInference(exp, conc, infer);
  return true;
}

bool InferenceManager::sendInference(const std::vector<Node>& exp,
                                     const std::vector<Node>& noExplain,
                                     Node eq,
                                     InferenceId infer,
                                     bool isRev,
                                     bool asLemma)
{
  if (eq.isNull())
  {
    eq = d_false;
  }
  else if (Rewriter::rewrite(eq) == d_true)
  {
    // if trivial, return
    return false;
  }
  // wrap in infer info and send below
  InferInfo ii(infer);
  ii.d_idRev = isRev;
  ii.d_conc = eq;
  ii.d_premises = exp;
  ii.d_noExplain = noExplain;
  sendInference(ii, asLemma);
  return true;
}

bool InferenceManager::sendInference(const std::vector<Node>& exp,
                                     Node eq,
                                     InferenceId infer,
                                     bool isRev,
                                     bool asLemma)
{
  std::vector<Node> noExplain;
  return sendInference(exp, noExplain, eq, infer, isRev, asLemma);
}

void InferenceManager::sendInference(InferInfo& ii, bool asLemma)
{
  Assert(!ii.isTrivial());
  // set that this inference manager will be processing this inference
  ii.d_sim = this;
  Trace("strings-infer-debug")
      << "sendInference: " << ii << ", asLemma = " << asLemma << std::endl;
  // check if we should send a conflict, lemma or a fact
  if (ii.isConflict())
  {
    Trace("strings-infer-debug") << "...as conflict" << std::endl;
    Trace("strings-lemma") << "Strings::Conflict: " << ii.d_premises << " by "
                           << ii.getId() << std::endl;
    Trace("strings-conflict") << "CONFLICT: inference conflict " << ii.d_premises << " by " << ii.getId() << std::endl;
    ++(d_statistics.d_conflictsInfer);
    // process the conflict immediately
    processConflict(ii);
    return;
  }
  else if (asLemma || options::stringInferAsLemmas() || !ii.isFact())
  {
    Trace("strings-infer-debug") << "...as lemma" << std::endl;
    addPendingLemma(std::unique_ptr<InferInfo>(new InferInfo(ii)));
    return;
  }
  if (options::stringInferSym())
  {
    std::vector<Node> unproc;
    for (const Node& ac : ii.d_premises)
    {
      d_termReg.removeProxyEqs(ac, unproc);
    }
    if (unproc.empty())
    {
      Node eqs = ii.d_conc;
      // keep the same id for now, since we are transforming the form of the
      // inference, not the root reason.
      InferInfo iiSubsLem(ii.getId());
      iiSubsLem.d_sim = this;
      iiSubsLem.d_conc = eqs;
      if (Trace.isOn("strings-lemma-debug"))
      {
        Trace("strings-lemma-debug")
            << "Strings::Infer " << iiSubsLem << std::endl;
        Trace("strings-lemma-debug")
            << "Strings::Infer Alternate : " << eqs << std::endl;
      }
      Trace("strings-infer-debug") << "...as symbolic lemma" << std::endl;
      addPendingLemma(std::unique_ptr<InferInfo>(new InferInfo(iiSubsLem)));
      return;
    }
    if (Trace.isOn("strings-lemma-debug"))
    {
      for (const Node& u : unproc)
      {
        Trace("strings-lemma-debug")
            << "  non-trivial explanation : " << u << std::endl;
      }
    }
  }
  Trace("strings-infer-debug") << "...as fact" << std::endl;
  // add to pending to be processed as a fact
  addPendingFact(std::unique_ptr<InferInfo>(new InferInfo(ii)));
}

bool InferenceManager::sendSplit(Node a, Node b, InferenceId infer, bool preq)
{
  Node eq = a.eqNode(b);
  eq = Rewriter::rewrite(eq);
  if (eq.isConst())
  {
    return false;
  }
  NodeManager* nm = NodeManager::currentNM();
  InferInfo iiSplit(infer);
  iiSplit.d_sim = this;
  iiSplit.d_conc = nm->mkNode(OR, eq, nm->mkNode(NOT, eq));
  eq = Rewriter::rewrite(eq);
  addPendingPhaseRequirement(eq, preq);
  addPendingLemma(std::unique_ptr<InferInfo>(new InferInfo(iiSplit)));
  return true;
}

void InferenceManager::addToExplanation(Node a,
                                        Node b,
                                        std::vector<Node>& exp) const
{
  if (a != b)
  {
    Debug("strings-explain")
        << "Add to explanation : " << a << " == " << b << std::endl;
    Assert(d_state.areEqual(a, b));
    exp.push_back(a.eqNode(b));
  }
}

void InferenceManager::addToExplanation(Node lit, std::vector<Node>& exp) const
{
  if (!lit.isNull())
  {
    Assert(!lit.isConst());
    exp.push_back(lit);
  }
}

bool InferenceManager::hasProcessed() const
{
  return d_state.isInConflict() || hasPending();
}

void InferenceManager::markReduced(Node n, ExtReducedId id, bool contextDepend)
{
  d_extt.markReduced(n, id, contextDepend);
}

void InferenceManager::processConflict(const InferInfo& ii)
{
  Assert(!d_state.isInConflict());
  // setup the fact to reproduce the proof in the call below
  if (d_ipc != nullptr)
  {
    d_ipc->notifyFact(ii);
  }
  // make the trust node
  TrustNode tconf = mkConflictExp(ii.d_premises, d_ipc.get());
  Assert(tconf.getKind() == TrustNodeKind::CONFLICT);
  Trace("strings-assert") << "(assert (not " << tconf.getNode()
                          << ")) ; conflict " << ii.getId() << std::endl;
  // send the trusted conflict
  trustedConflict(tconf, ii.getId());
}

void InferenceManager::processFact(InferInfo& ii, ProofGenerator*& pg)
{
  Trace("strings-assert") << "(assert (=> " << ii.getPremises() << " "
                          << ii.d_conc << ")) ; fact " << ii.getId() << std::endl;
  Trace("strings-lemma") << "Strings::Fact: " << ii.d_conc << " from "
                         << ii.getPremises() << " by " << ii.getId()
                         << std::endl;
  if (d_ipc != nullptr)
  {
    // ensure the proof generator is ready to explain this fact in the
    // current SAT context
    d_ipc->notifyFact(ii);
    pg = d_ipc.get();
  }
}

TrustNode InferenceManager::processLemma(InferInfo& ii, LemmaProperty& p)
{
  Assert(!ii.isTrivial());
  Assert(!ii.isConflict());
  // set up the explanation and no-explanation
  std::vector<Node> exp;
  for (const Node& ec : ii.d_premises)
  {
    utils::flattenOp(AND, ec, exp);
  }
  std::vector<Node> noExplain;
  if (!options::stringRExplainLemmas())
  {
    // if we aren't regressing the explanation, we add all literals to
    // noExplain and ignore ii.d_ant.
    noExplain.insert(noExplain.end(), exp.begin(), exp.end());
  }
  else
  {
    // otherwise, the no-explain literals are those provided
    for (const Node& ecn : ii.d_noExplain)
    {
      utils::flattenOp(AND, ecn, noExplain);
    }
  }
  // ensure that the proof generator is ready to explain the final conclusion
  // of the lemma (ii.d_conc).
  if (d_ipc != nullptr)
  {
    d_ipc->notifyFact(ii);
  }
  TrustNode tlem = mkLemmaExp(ii.d_conc, exp, noExplain, d_ipc.get());
  Trace("strings-pending") << "Process pending lemma : " << tlem.getNode()
                           << std::endl;

  // Process the side effects of the inference info.
  // Register the new skolems from this inference. We register them here
  // (lazily), since this is the moment when we have decided to process the
  // inference.
  for (const std::pair<const LengthStatus, std::vector<Node> >& sks :
       ii.d_skolems)
  {
    for (const Node& n : sks.second)
    {
      d_termReg.registerTermAtomic(n, sks.first);
    }
  }
  if (ii.getId() == InferenceId::STRINGS_REDUCTION)
  {
    p |= LemmaProperty::NEEDS_JUSTIFY;
  }
  Trace("strings-assert") << "(assert " << tlem.getNode() << ") ; lemma "
                          << ii.getId() << std::endl;
  Trace("strings-lemma") << "Strings::Lemma: " << tlem.getNode() << " by "
                         << ii.getId() << std::endl;
  return tlem;
}

}  // namespace strings
}  // namespace theory
}  // namespace cvc5


Generated by: GCOVR (Version 3.2)

Line	Exec	Source
1		/******************************************************************************
2		* Top contributors (to current version):
3		* Andrew Reynolds, Gereon Kremer, Mudathir Mohamed
4		*
5		* This file is part of the cvc5 project.
6		*
7		* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
8		* in the top-level source directory and their institutional affiliations.
9		* All rights reserved. See the file COPYING in the top-level source
10		* directory for licensing information.
11		* ****************************************************************************
12		*
13		* Implementation of the inference manager for the theory of strings.
14		*/
15
16		#include "theory/strings/inference_manager.h"
17
18		#include "options/strings_options.h"
19		#include "theory/ext_theory.h"
20		#include "theory/rewriter.h"
21		#include "theory/strings/theory_strings_utils.h"
22		#include "theory/strings/word.h"
23		#include "util/rational.h"
24
25		using namespace std;
26		using namespace cvc5::context;
27		using namespace cvc5::kind;
28
29		namespace cvc5 {
30		namespace theory {
31		namespace strings {
32
33	9942	InferenceManager::InferenceManager(Env& env,
34		Theory& t,
35		SolverState& s,
36		TermRegistry& tr,
37		ExtTheory& e,
38		SequencesStatistics& statistics,
39	9942	ProofNodeManager* pnm)
40		: InferenceManagerBuffered(env, t, s, pnm, "theory::strings::", false),
41		d_state(s),
42		d_termReg(tr),
43		d_extt(e),
44		d_statistics(statistics),
45	9942	d_ipc(pnm ? new InferProofCons(context(), pnm, d_statistics) : nullptr)
46		{
47	9942	NodeManager* nm = NodeManager::currentNM();
48	9942	d_zero = nm->mkConst(Rational(0));
49	9942	d_one = nm->mkConst(Rational(1));
50	9942	d_true = nm->mkConst(true);
51	9942	d_false = nm->mkConst(false);
52	9942	}
53
54	41660	void InferenceManager::doPending()
55		{
56	41660	doPendingFacts();
57	41660	if (d_state.isInConflict())
58		{
59		// just clear the pending vectors, nothing else to do
60	2906	clearPendingLemmas();
61	2906	clearPendingPhaseRequirements();
62	2906	return;
63		}
64	38754	doPendingLemmas();
65	38754	doPendingPhaseRequirements();
66		}
67
68	39957	bool InferenceManager::sendInternalInference(std::vector<Node>& exp,
69		Node conc,
70		InferenceId infer)
71		{
72	79914	if (conc.getKind() == AND
73	79914	\|\| (conc.getKind() == NOT && conc[0].getKind() == OR))
74		{
75	5446	Node conj = conc.getKind() == AND ? conc : conc[0];
76	2723	bool pol = conc.getKind() == AND;
77	2723	bool ret = true;
78	10039	for (const Node& cc : conj)
79		{
80	7316	bool retc = sendInternalInference(exp, pol ? cc : cc.negate(), infer);
81	7316	ret = ret && retc;
82		}
83	2723	return ret;
84		}
85	37234	bool pol = conc.getKind() != NOT;
86	74468	Node lit = pol ? conc : conc[0];
87	37234	if (lit.getKind() == EQUAL)
88		{
89	17212	for (unsigned i = 0; i < 2; i++)
90		{
91	11572	if (!lit[i].isConst() && !d_state.hasTerm(lit[i]))
92		{
93		// introduces a new non-constant term, do not infer
94	146	return false;
95		}
96		}
97		// does it already hold?
98	19820	if (pol ? d_state.areEqual(lit[0], lit[1])
99	14180	: d_state.areDisequal(lit[0], lit[1]))
100		{
101	5124	return true;
102		}
103		}
104	31448	else if (lit.isConst())
105		{
106	142	if (lit.getConst<bool>())
107		{
108		Assert(pol);
109		// trivially holds
110		return true;
111		}
112		}
113	31306	else if (!d_state.hasTerm(lit))
114		{
115		// introduces a new non-constant term, do not infer
116	28624	return false;
117		}
118	2682	else if (d_state.areEqual(lit, pol ? d_true : d_false))
119		{
120		// already holds
121	2638	return true;
122		}
123	702	sendInference(exp, conc, infer);
124	702	return true;
125		}
126
127	61936	bool InferenceManager::sendInference(const std::vector<Node>& exp,
128		const std::vector<Node>& noExplain,
129		Node eq,
130		InferenceId infer,
131		bool isRev,
132		bool asLemma)
133		{
134	61936	if (eq.isNull())
135		{
136	78	eq = d_false;
137		}
138	61858	else if (Rewriter::rewrite(eq) == d_true)
139		{
140		// if trivial, return
141	6	return false;
142		}
143		// wrap in infer info and send below
144	123860	InferInfo ii(infer);
145	61930	ii.d_idRev = isRev;
146	61930	ii.d_conc = eq;
147	61930	ii.d_premises = exp;
148	61930	ii.d_noExplain = noExplain;
149	61930	sendInference(ii, asLemma);
150	61930	return true;
151		}
152
153	57201	bool InferenceManager::sendInference(const std::vector<Node>& exp,
154		Node eq,
155		InferenceId infer,
156		bool isRev,
157		bool asLemma)
158		{
159	114402	std::vector<Node> noExplain;
160	114402	return sendInference(exp, noExplain, eq, infer, isRev, asLemma);
161		}
162
163	64984	void InferenceManager::sendInference(InferInfo& ii, bool asLemma)
164		{
165	64984	Assert(!ii.isTrivial());
166		// set that this inference manager will be processing this inference
167	64984	ii.d_sim = this;
168	129968	Trace("strings-infer-debug")
169	64984	<< "sendInference: " << ii << ", asLemma = " << asLemma << std::endl;
170		// check if we should send a conflict, lemma or a fact
171	64984	if (ii.isConflict())
172		{
173	1394	Trace("strings-infer-debug") << "...as conflict" << std::endl;
174	2788	Trace("strings-lemma") << "Strings::Conflict: " << ii.d_premises << " by "
175	1394	<< ii.getId() << std::endl;
176	1394	Trace("strings-conflict") << "CONFLICT: inference conflict " << ii.d_premises << " by " << ii.getId() << std::endl;
177	1394	++(d_statistics.d_conflictsInfer);
178		// process the conflict immediately
179	1394	processConflict(ii);
180	1394	return;
181		}
182	63590	else if (asLemma \|\| options::stringInferAsLemmas() \|\| !ii.isFact())
183		{
184	24991	Trace("strings-infer-debug") << "...as lemma" << std::endl;
185	24991	addPendingLemma(std::unique_ptr<InferInfo>(new InferInfo(ii)));
186	24991	return;
187		}
188	38599	if (options::stringInferSym())
189		{
190	77198	std::vector<Node> unproc;
191	126349	for (const Node& ac : ii.d_premises)
192		{
193	87750	d_termReg.removeProxyEqs(ac, unproc);
194		}
195	38599	if (unproc.empty())
196		{
197		Node eqs = ii.d_conc;
198		// keep the same id for now, since we are transforming the form of the
199		// inference, not the root reason.
200		InferInfo iiSubsLem(ii.getId());
201		iiSubsLem.d_sim = this;
202		iiSubsLem.d_conc = eqs;
203		if (Trace.isOn("strings-lemma-debug"))
204		{
205		Trace("strings-lemma-debug")
206		<< "Strings::Infer " << iiSubsLem << std::endl;
207		Trace("strings-lemma-debug")
208		<< "Strings::Infer Alternate : " << eqs << std::endl;
209		}
210		Trace("strings-infer-debug") << "...as symbolic lemma" << std::endl;
211		addPendingLemma(std::unique_ptr<InferInfo>(new InferInfo(iiSubsLem)));
212		return;
213		}
214	38599	if (Trace.isOn("strings-lemma-debug"))
215		{
216		for (const Node& u : unproc)
217		{
218		Trace("strings-lemma-debug")
219		<< " non-trivial explanation : " << u << std::endl;
220		}
221		}
222		}
223	38599	Trace("strings-infer-debug") << "...as fact" << std::endl;
224		// add to pending to be processed as a fact
225	38599	addPendingFact(std::unique_ptr<InferInfo>(new InferInfo(ii)));
226		}
227
228	585	bool InferenceManager::sendSplit(Node a, Node b, InferenceId infer, bool preq)
229		{
230	1170	Node eq = a.eqNode(b);
231	585	eq = Rewriter::rewrite(eq);
232	585	if (eq.isConst())
233		{
234		return false;
235		}
236	585	NodeManager* nm = NodeManager::currentNM();
237	1170	InferInfo iiSplit(infer);
238	585	iiSplit.d_sim = this;
239	585	iiSplit.d_conc = nm->mkNode(OR, eq, nm->mkNode(NOT, eq));
240	585	eq = Rewriter::rewrite(eq);
241	585	addPendingPhaseRequirement(eq, preq);
242	585	addPendingLemma(std::unique_ptr<InferInfo>(new InferInfo(iiSplit)));
243	585	return true;
244		}
245
246	944405	void InferenceManager::addToExplanation(Node a,
247		Node b,
248		std::vector<Node>& exp) const
249		{
250	944405	if (a != b)
251		{
252	953388	Debug("strings-explain")
253	476694	<< "Add to explanation : " << a << " == " << b << std::endl;
254	476694	Assert(d_state.areEqual(a, b));
255	476694	exp.push_back(a.eqNode(b));
256		}
257	944405	}
258
259		void InferenceManager::addToExplanation(Node lit, std::vector<Node>& exp) const
260		{
261		if (!lit.isNull())
262		{
263		Assert(!lit.isConst());
264		exp.push_back(lit);
265		}
266		}
267
268	3841216	bool InferenceManager::hasProcessed() const
269		{
270	3841216	return d_state.isInConflict() \|\| hasPending();
271		}
272
273	197	void InferenceManager::markReduced(Node n, ExtReducedId id, bool contextDepend)
274		{
275	197	d_extt.markReduced(n, id, contextDepend);
276	197	}
277
278	1837	void InferenceManager::processConflict(const InferInfo& ii)
279		{
280	1837	Assert(!d_state.isInConflict());
281		// setup the fact to reproduce the proof in the call below
282	1837	if (d_ipc != nullptr)
283		{
284	260	d_ipc->notifyFact(ii);
285		}
286		// make the trust node
287	3674	TrustNode tconf = mkConflictExp(ii.d_premises, d_ipc.get());
288	1837	Assert(tconf.getKind() == TrustNodeKind::CONFLICT);
289	3674	Trace("strings-assert") << "(assert (not " << tconf.getNode()
290	1837	<< ")) ; conflict " << ii.getId() << std::endl;
291		// send the trusted conflict
292	1837	trustedConflict(tconf, ii.getId());
293	1837	}
294
295	37631	void InferenceManager::processFact(InferInfo& ii, ProofGenerator*& pg)
296		{
297	75262	Trace("strings-assert") << "(assert (=> " << ii.getPremises() << " "
298	37631	<< ii.d_conc << ")) ; fact " << ii.getId() << std::endl;
299	75262	Trace("strings-lemma") << "Strings::Fact: " << ii.d_conc << " from "
300	75262	<< ii.getPremises() << " by " << ii.getId()
301	37631	<< std::endl;
302	37631	if (d_ipc != nullptr)
303		{
304		// ensure the proof generator is ready to explain this fact in the
305		// current SAT context
306	9287	d_ipc->notifyFact(ii);
307	9287	pg = d_ipc.get();
308		}
309	37631	}
310
311	25297	TrustNode InferenceManager::processLemma(InferInfo& ii, LemmaProperty& p)
312		{
313	25297	Assert(!ii.isTrivial());
314	25297	Assert(!ii.isConflict());
315		// set up the explanation and no-explanation
316	50594	std::vector<Node> exp;
317	80457	for (const Node& ec : ii.d_premises)
318		{
319	55160	utils::flattenOp(AND, ec, exp);
320		}
321	50594	std::vector<Node> noExplain;
322	25297	if (!options::stringRExplainLemmas())
323		{
324		// if we aren't regressing the explanation, we add all literals to
325		// noExplain and ignore ii.d_ant.
326		noExplain.insert(noExplain.end(), exp.begin(), exp.end());
327		}
328		else
329		{
330		// otherwise, the no-explain literals are those provided
331	30607	for (const Node& ecn : ii.d_noExplain)
332		{
333	5310	utils::flattenOp(AND, ecn, noExplain);
334		}
335		}
336		// ensure that the proof generator is ready to explain the final conclusion
337		// of the lemma (ii.d_conc).
338	25297	if (d_ipc != nullptr)
339		{
340	4933	d_ipc->notifyFact(ii);
341		}
342	25297	TrustNode tlem = mkLemmaExp(ii.d_conc, exp, noExplain, d_ipc.get());
343	50594	Trace("strings-pending") << "Process pending lemma : " << tlem.getNode()
344	25297	<< std::endl;
345
346		// Process the side effects of the inference info.
347		// Register the new skolems from this inference. We register them here
348		// (lazily), since this is the moment when we have decided to process the
349		// inference.
350	1407	for (const std::pair<const LengthStatus, std::vector<Node> >& sks :
351	25297	ii.d_skolems)
352		{
353	2814	for (const Node& n : sks.second)
354		{
355	1407	d_termReg.registerTermAtomic(n, sks.first);
356		}
357		}
358	25297	if (ii.getId() == InferenceId::STRINGS_REDUCTION)
359		{
360	2110	p \|= LemmaProperty::NEEDS_JUSTIFY;
361		}
362	50594	Trace("strings-assert") << "(assert " << tlem.getNode() << ") ; lemma "
363	25297	<< ii.getId() << std::endl;
364	50594	Trace("strings-lemma") << "Strings::Lemma: " << tlem.getNode() << " by "
365	25297	<< ii.getId() << std::endl;
366	50594	return tlem;
367		}
368
369		} // namespace strings
370		} // namespace theory
371	29577	} // namespace cvc5