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/******************************************************************************
* Top contributors (to current version):
* Abdalrhman Mohamed, Hans-Joerg Schurr, Aina Niemetz
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2025 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.
* ****************************************************************************
*
* Black box testing of the guards of the Java API functions.
*/
package tests;
import static io.github.cvc5.Kind.*;
import static io.github.cvc5.SortKind.*;
import static io.github.cvc5.ProofRule.*;
import static org.junit.jupiter.api.Assertions.*;
import io.github.cvc5.*;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
class ProofTest
{
private TermManager d_tm;
private Solver d_solver;
@BeforeEach
void setUp()
{
d_tm = new TermManager();
d_solver = new Solver(d_tm);
}
@AfterEach
void tearDown()
{
Context.deletePointers();
}
Proof createProof() throws CVC5ApiException
{
d_solver.setOption("produce-proofs", "true");
Sort uSort = d_tm.mkUninterpretedSort("u");
Sort intSort = d_tm.getIntegerSort();
Sort boolSort = d_tm.getBooleanSort();
Sort uToIntSort = d_tm.mkFunctionSort(uSort, intSort);
Sort intPredSort = d_tm.mkFunctionSort(intSort, boolSort);
Term x = d_tm.mkConst(uSort, "x");
Term y = d_tm.mkConst(uSort, "y");
Term f = d_tm.mkConst(uToIntSort, "f");
Term p = d_tm.mkConst(intPredSort, "p");
Term zero = d_tm.mkInteger(0);
Term one = d_tm.mkInteger(1);
Term f_x = d_tm.mkTerm(Kind.APPLY_UF, f, x);
Term f_y = d_tm.mkTerm(Kind.APPLY_UF, f, y);
Term sum = d_tm.mkTerm(Kind.ADD, f_x, f_y);
Term p_0 = d_tm.mkTerm(Kind.APPLY_UF, p, zero);
Term p_f_y = d_tm.mkTerm(APPLY_UF, p, f_y);
d_solver.assertFormula(d_tm.mkTerm(Kind.GT, zero, f_x));
d_solver.assertFormula(d_tm.mkTerm(Kind.GT, zero, f_y));
d_solver.assertFormula(d_tm.mkTerm(Kind.GT, sum, one));
d_solver.assertFormula(p_0);
d_solver.assertFormula(p_f_y.notTerm());
assertTrue(d_solver.checkSat().isUnsat());
return d_solver.getProof()[0];
}
Proof createRewriteProof() throws CVC5ApiException
{
d_solver.setOption("produce-proofs", "true");
d_solver.setOption("proof-granularity", "dsl-rewrite");
Sort intSort = d_tm.getIntegerSort();
Term x = d_tm.mkConst(intSort, "x");
Term zero = d_tm.mkInteger(0);
Term geq = d_tm.mkTerm(Kind.GEQ, new Term[]{x, zero});
Term leq = d_tm.mkTerm(Kind.LEQ, new Term[]{zero, x});
d_solver.assertFormula(
d_tm.mkTerm(Kind.DISTINCT, new Term[]{geq, leq}));
d_solver.checkSat();
return d_solver.getProof()[0];
}
@Test
void nullProof() throws CVC5ApiException
{
Proof proof = new Proof();
assertEquals(proof.getRule(), ProofRule.UNKNOWN);
assertEquals(ProofRule.UNKNOWN.hashCode(), ProofRule.UNKNOWN.hashCode());
assertTrue(proof.getResult().isNull());
assertTrue(proof.getChildren().length == 0);
assertTrue(proof.getArguments().length == 0);
}
@Test
void equalHash() throws CVC5ApiException
{
Proof x = createProof();
Proof y = x.getChildren()[0];
Proof n = new Proof();
assertTrue(x.equals(x));
assertFalse(x.equals(y));
assertFalse(x.equals(n));
assertTrue(x.hashCode() == x.hashCode());
}
@Test
void getRule() throws CVC5ApiException
{
Proof proof = createProof();
assertEquals(ProofRule.SCOPE, proof.getRule());
}
@Test
void getRewriteRule() throws CVC5ApiException
{
Proof proof = createRewriteProof();
assertThrows(CVC5ApiException.class, () -> proof.getRewriteRule());
ProofRule rule;
List<Proof> stack = new ArrayList<Proof>();
stack.add(proof);
Proof curr;
do
{
curr = stack.get(stack.size() - 1);
stack.remove(stack.size() - 1);
rule = curr.getRule();
Proof[] children = curr.getChildren();
stack.addAll(Arrays.asList(children));
} while (rule != ProofRule.DSL_REWRITE);
Proof rewriteProof = curr;
assertDoesNotThrow(() -> rewriteProof.getRewriteRule());
}
@Test
void getResult() throws CVC5ApiException
{
Proof proof = createProof();
assertDoesNotThrow(() -> proof.getResult());
}
@Test
void getChildren() throws CVC5ApiException
{
Proof proof = createProof();
Proof[] children = proof.getChildren();
assertNotEquals(0, children.length);
}
@Test
void getArguments() throws CVC5ApiException
{
Proof proof = createProof();
assertDoesNotThrow(() -> proof.getArguments());
}
@Test
void eq() throws CVC5ApiException
{
Proof x = createProof();
Proof y = x.getChildren()[0];
Proof z = new Proof();
assertTrue(x.equals(x));
assertFalse(x.equals(y));
assertFalse(x.equals(z));
assertTrue(x.hashCode() == x.hashCode());
}
}
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