./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-005.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:15,764 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:15,864 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccde6c12-f3e4-4c6f-ac21-41baa67f9595/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:15,870 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:15,872 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:15,910 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:15,911 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:15,911 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:15,913 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:15,913 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:15,914 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:15,914 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:15,914 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:15,914 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:15,914 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:15,914 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:15,914 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:15,916 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:15,917 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:15,917 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:15,917 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:15,917 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:15,917 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:15,917 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:15,918 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:15,919 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:15,919 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:16,303 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:16,318 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:16,321 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:16,322 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:16,324 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:16,325 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccde6c12-f3e4-4c6f-ac21-41baa67f9595/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-005.smt2
[2025-04-28 21:21:16,329 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:16,333 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:16,659 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccde6c12-f3e4-4c6f-ac21-41baa67f9595/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-005.smt2
[2025-04-28 21:21:16,662 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:16,664 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:16,668 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:16,668 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:16,668 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:16,671 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,716 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16 Unit
[2025-04-28 21:21:16,717 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:16,718 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:16,718 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:16,718 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:16,738 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,739 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,767 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,768 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,771 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,773 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,774 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,776 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,776 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,804 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:16,805 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:16,805 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:16,805 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:16,806 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (1/1) ...
[2025-04-28 21:21:16,812 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:16,830 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:16,848 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2025-04-28 21:21:16,853 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2025-04-28 21:21:16,873 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:16,874 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:16,875 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:16,875 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure main.ATaddition.exit.split given in one single declaration
[2025-04-28 21:21:16,875 INFO  L130     BoogieDeclarations]: Found specification of procedure main.ATaddition.exit.split
[2025-04-28 21:21:16,875 INFO  L138     BoogieDeclarations]: Found implementation of procedure main.ATaddition.exit.split
[2025-04-28 21:21:16,875 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure main.ATentry given in one single declaration
[2025-04-28 21:21:16,875 INFO  L130     BoogieDeclarations]: Found specification of procedure main.ATentry
[2025-04-28 21:21:16,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure main.ATentry
[2025-04-28 21:21:16,876 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure main.AT.lr.ph.i given in one single declaration
[2025-04-28 21:21:16,876 INFO  L130     BoogieDeclarations]: Found specification of procedure main.AT.lr.ph.i
[2025-04-28 21:21:16,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure main.AT.lr.ph.i
[2025-04-28 21:21:16,876 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:16,877 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:16,878 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:16,965 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:16,967 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:17,160 INFO  L?                        ?]: Removed 53 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:17,160 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:17,179 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:17,179 INFO  L312             CfgBuilder]: Removed 2 assume(true) statements.
[2025-04-28 21:21:17,181 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:17 BoogieIcfgContainer
[2025-04-28 21:21:17,181 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:17,185 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:17,186 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:17,190 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:17,190 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:16" (1/3) ...
[2025-04-28 21:21:17,191 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf970a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:17, skipping insertion in model container
[2025-04-28 21:21:17,191 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:16" (2/3) ...
[2025-04-28 21:21:17,192 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf970a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:17, skipping insertion in model container
[2025-04-28 21:21:17,192 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:17" (3/3) ...
[2025-04-28 21:21:17,193 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:17,211 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:17,214 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 5 procedures, 20 locations, 29 edges, 5 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:17,269 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:17,293 INFO  L340      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@45f18c37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:17,293 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:17,298 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 20 states, 8 states have (on average 1.375) internal successors, (11), 11 states have internal predecessors, (11), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6)
[2025-04-28 21:21:17,308 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2025-04-28 21:21:17,309 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:17,310 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:17,312 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:17,318 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:17,320 INFO  L85        PathProgramCache]: Analyzing trace with hash -328123910, now seen corresponding path program 1 times
[2025-04-28 21:21:17,327 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:17,328 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203270765]
[2025-04-28 21:21:17,328 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:17,328 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:17,350 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes.
[2025-04-28 21:21:17,353 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements.
[2025-04-28 21:21:17,353 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:17,353 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:17,394 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-04-28 21:21:17,394 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:17,394 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203270765]
[2025-04-28 21:21:17,395 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203270765] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:17,395 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:17,399 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2025-04-28 21:21:17,400 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488647704]
[2025-04-28 21:21:17,401 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:17,406 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2025-04-28 21:21:17,406 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:17,440 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2025-04-28 21:21:17,442 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2025-04-28 21:21:17,446 INFO  L87              Difference]: Start difference. First operand  has 20 states, 8 states have (on average 1.375) internal successors, (11), 11 states have internal predecessors, (11), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Second operand  has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:21:17,468 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:17,468 INFO  L93              Difference]: Finished difference Result 17 states and 18 transitions.
[2025-04-28 21:21:17,469 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2025-04-28 21:21:17,471 INFO  L79                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 11
[2025-04-28 21:21:17,471 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:17,480 INFO  L225             Difference]: With dead ends: 17
[2025-04-28 21:21:17,480 INFO  L226             Difference]: Without dead ends: 17
[2025-04-28 21:21:17,482 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2025-04-28 21:21:17,487 INFO  L437           NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:17,488 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:17,504 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2025-04-28 21:21:17,534 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2025-04-28 21:21:17,537 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 8 states have internal predecessors, (8), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:17,544 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions.
[2025-04-28 21:21:17,546 INFO  L79                 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11
[2025-04-28 21:21:17,546 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:17,546 INFO  L485      AbstractCegarLoop]: Abstraction has 17 states and 18 transitions.
[2025-04-28 21:21:17,546 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:21:17,547 INFO  L278                IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions.
[2025-04-28 21:21:17,549 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2025-04-28 21:21:17,549 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:17,549 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:17,549 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:17,550 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:17,550 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:17,550 INFO  L85        PathProgramCache]: Analyzing trace with hash 535393391, now seen corresponding path program 1 times
[2025-04-28 21:21:17,550 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:17,551 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429166390]
[2025-04-28 21:21:17,551 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:17,551 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:17,573 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes.
[2025-04-28 21:21:17,654 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements.
[2025-04-28 21:21:17,654 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:17,655 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:18,409 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-04-28 21:21:18,409 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:18,409 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429166390]
[2025-04-28 21:21:18,410 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429166390] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:18,410 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:18,410 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:18,410 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532263733]
[2025-04-28 21:21:18,410 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:18,412 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:18,412 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:18,413 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:18,416 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:18,416 INFO  L87              Difference]: Start difference. First operand 17 states and 18 transitions. Second operand  has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4)
[2025-04-28 21:21:18,450 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:18,450 INFO  L93              Difference]: Finished difference Result 19 states and 20 transitions.
[2025-04-28 21:21:18,451 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:18,452 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15
[2025-04-28 21:21:18,452 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:18,453 INFO  L225             Difference]: With dead ends: 19
[2025-04-28 21:21:18,453 INFO  L226             Difference]: Without dead ends: 19
[2025-04-28 21:21:18,453 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:18,454 INFO  L437           NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:18,455 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:18,456 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2025-04-28 21:21:18,461 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2025-04-28 21:21:18,462 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6)
[2025-04-28 21:21:18,463 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions.
[2025-04-28 21:21:18,464 INFO  L79                 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15
[2025-04-28 21:21:18,465 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:18,465 INFO  L485      AbstractCegarLoop]: Abstraction has 19 states and 20 transitions.
[2025-04-28 21:21:18,466 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4)
[2025-04-28 21:21:18,466 INFO  L278                IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions.
[2025-04-28 21:21:18,467 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2025-04-28 21:21:18,468 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:18,468 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:18,468 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2025-04-28 21:21:18,469 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:18,469 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:18,469 INFO  L85        PathProgramCache]: Analyzing trace with hash -93204314, now seen corresponding path program 1 times
[2025-04-28 21:21:18,470 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:18,470 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758453198]
[2025-04-28 21:21:18,470 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:18,471 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:18,485 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:18,502 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:18,502 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:18,502 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:19,031 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:19,031 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:19,031 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758453198]
[2025-04-28 21:21:19,031 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758453198] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:19,031 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826829052]
[2025-04-28 21:21:19,032 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:19,032 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:19,035 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:19,040 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:19,042 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:19,119 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:19,166 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:19,166 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:19,166 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:19,171 INFO  L256         TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:19,178 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:19,690 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:19,690 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:21,676 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:21,676 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826829052] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:21,676 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:21,677 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12
[2025-04-28 21:21:21,677 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636125414]
[2025-04-28 21:21:21,677 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:21,677 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2025-04-28 21:21:21,678 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:21,678 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2025-04-28 21:21:21,678 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:21,679 INFO  L87              Difference]: Start difference. First operand 19 states and 20 transitions. Second operand  has 12 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 12 states have internal predecessors, (17), 10 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 5 states have call predecessors, (11), 10 states have call successors, (11)
[2025-04-28 21:21:21,770 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:21,770 INFO  L93              Difference]: Finished difference Result 21 states and 22 transitions.
[2025-04-28 21:21:21,771 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:21,771 INFO  L79                 Accepts]: Start accepts. Automaton has  has 12 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 12 states have internal predecessors, (17), 10 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 5 states have call predecessors, (11), 10 states have call successors, (11) Word has length 19
[2025-04-28 21:21:21,771 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:21,772 INFO  L225             Difference]: With dead ends: 21
[2025-04-28 21:21:21,772 INFO  L226             Difference]: Without dead ends: 21
[2025-04-28 21:21:21,772 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156
[2025-04-28 21:21:21,773 INFO  L437           NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:21,774 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 104 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:21,774 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2025-04-28 21:21:21,777 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2025-04-28 21:21:21,777 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7)
[2025-04-28 21:21:21,778 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2025-04-28 21:21:21,778 INFO  L79                 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19
[2025-04-28 21:21:21,778 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:21,778 INFO  L485      AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2025-04-28 21:21:21,778 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 12 states have internal predecessors, (17), 10 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 5 states have call predecessors, (11), 10 states have call successors, (11)
[2025-04-28 21:21:21,779 INFO  L278                IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2025-04-28 21:21:21,779 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2025-04-28 21:21:21,779 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:21,779 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:21,785 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:21,984 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:21,984 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:21,985 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:21,985 INFO  L85        PathProgramCache]: Analyzing trace with hash 1872350877, now seen corresponding path program 2 times
[2025-04-28 21:21:21,985 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:21,985 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136201968]
[2025-04-28 21:21:21,985 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:21,986 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:21,996 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes.
[2025-04-28 21:21:22,019 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements.
[2025-04-28 21:21:22,020 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:22,020 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:22,591 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2025-04-28 21:21:22,591 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:22,591 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136201968]
[2025-04-28 21:21:22,591 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136201968] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:22,591 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275478418]
[2025-04-28 21:21:22,591 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:22,592 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:22,595 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:22,597 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:22,600 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:22,656 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes.
[2025-04-28 21:21:22,688 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements.
[2025-04-28 21:21:22,688 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:22,688 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:22,690 INFO  L256         TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 49 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:22,693 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:23,047 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2025-04-28 21:21:23,047 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:27,422 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:27,423 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [275478418] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:27,423 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:27,423 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14
[2025-04-28 21:21:27,423 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092734707]
[2025-04-28 21:21:27,424 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:27,424 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2025-04-28 21:21:27,425 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:27,426 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2025-04-28 21:21:27,427 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182
[2025-04-28 21:21:27,428 INFO  L87              Difference]: Start difference. First operand 21 states and 22 transitions. Second operand  has 14 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 14 states have internal predecessors, (18), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13)
[2025-04-28 21:21:27,512 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:27,512 INFO  L93              Difference]: Finished difference Result 23 states and 24 transitions.
[2025-04-28 21:21:27,513 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:27,514 INFO  L79                 Accepts]: Start accepts. Automaton has  has 14 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 14 states have internal predecessors, (18), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 23
[2025-04-28 21:21:27,514 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:27,514 INFO  L225             Difference]: With dead ends: 23
[2025-04-28 21:21:27,515 INFO  L226             Difference]: Without dead ends: 23
[2025-04-28 21:21:27,515 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240
[2025-04-28 21:21:27,516 INFO  L437           NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:27,516 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:27,520 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2025-04-28 21:21:27,525 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2025-04-28 21:21:27,525 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8)
[2025-04-28 21:21:27,526 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions.
[2025-04-28 21:21:27,526 INFO  L79                 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 23
[2025-04-28 21:21:27,526 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:27,526 INFO  L485      AbstractCegarLoop]: Abstraction has 23 states and 24 transitions.
[2025-04-28 21:21:27,526 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 14 states have internal predecessors, (18), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13)
[2025-04-28 21:21:27,526 INFO  L278                IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions.
[2025-04-28 21:21:27,527 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2025-04-28 21:21:27,527 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:27,527 INFO  L218           NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:27,533 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:27,728 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:27,728 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:27,728 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:27,729 INFO  L85        PathProgramCache]: Analyzing trace with hash -806732204, now seen corresponding path program 3 times
[2025-04-28 21:21:27,729 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:27,729 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551904677]
[2025-04-28 21:21:27,729 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:27,729 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:27,737 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes.
[2025-04-28 21:21:27,772 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 27 statements.
[2025-04-28 21:21:27,772 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:27,772 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:28,586 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2025-04-28 21:21:28,586 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:28,586 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551904677]
[2025-04-28 21:21:28,586 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551904677] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:28,586 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176541215]
[2025-04-28 21:21:28,586 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:28,587 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:28,589 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:28,591 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:28,595 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:28,668 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes.
[2025-04-28 21:21:28,703 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 27 statements.
[2025-04-28 21:21:28,703 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:28,703 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:28,706 INFO  L256         TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 62 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:28,708 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:29,050 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2025-04-28 21:21:29,050 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:37,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:37,654 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176541215] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:37,654 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:37,654 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 17
[2025-04-28 21:21:37,654 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393953995]
[2025-04-28 21:21:37,654 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:37,655 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2025-04-28 21:21:37,655 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:37,655 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2025-04-28 21:21:37,656 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272
[2025-04-28 21:21:37,656 INFO  L87              Difference]: Start difference. First operand 23 states and 24 transitions. Second operand  has 17 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 17 states have internal predecessors, (21), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16)
[2025-04-28 21:21:37,758 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:37,759 INFO  L93              Difference]: Finished difference Result 25 states and 26 transitions.
[2025-04-28 21:21:37,759 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:21:37,760 INFO  L79                 Accepts]: Start accepts. Automaton has  has 17 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 17 states have internal predecessors, (21), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) Word has length 27
[2025-04-28 21:21:37,760 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:37,760 INFO  L225             Difference]: With dead ends: 25
[2025-04-28 21:21:37,760 INFO  L226             Difference]: Without dead ends: 25
[2025-04-28 21:21:37,761 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380
[2025-04-28 21:21:37,762 INFO  L437           NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:37,762 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 88 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:37,763 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2025-04-28 21:21:37,765 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2025-04-28 21:21:37,766 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9)
[2025-04-28 21:21:37,766 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions.
[2025-04-28 21:21:37,766 INFO  L79                 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 27
[2025-04-28 21:21:37,767 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:37,767 INFO  L485      AbstractCegarLoop]: Abstraction has 25 states and 26 transitions.
[2025-04-28 21:21:37,767 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 17 states have internal predecessors, (21), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16)
[2025-04-28 21:21:37,767 INFO  L278                IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions.
[2025-04-28 21:21:37,768 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2025-04-28 21:21:37,768 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:37,768 INFO  L218           NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:37,772 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:37,969 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:37,970 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:37,970 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:37,970 INFO  L85        PathProgramCache]: Analyzing trace with hash -304615477, now seen corresponding path program 4 times
[2025-04-28 21:21:37,970 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:37,970 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487695032]
[2025-04-28 21:21:37,970 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:37,970 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:37,979 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes.
[2025-04-28 21:21:38,047 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements.
[2025-04-28 21:21:38,047 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s)
[2025-04-28 21:21:38,047 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:39,103 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2025-04-28 21:21:39,103 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:39,103 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487695032]
[2025-04-28 21:21:39,103 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487695032] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:39,103 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23524329]
[2025-04-28 21:21:39,103 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:39,103 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:39,106 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:39,108 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:39,112 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2025-04-28 21:21:39,216 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes.
[2025-04-28 21:21:39,261 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements.
[2025-04-28 21:21:39,261 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s)
[2025-04-28 21:21:39,261 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:39,263 INFO  L256         TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 75 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:39,266 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:39,670 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2025-04-28 21:21:39,671 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
