./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-029.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:28,871 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:28,932 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbc0202-bf5d-4fbd-8347-ff818bc21dd1/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:28,937 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:28,937 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:28,975 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:28,977 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:28,977 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:28,977 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:28,977 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:28,978 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:28,978 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:28,978 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:28,979 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:28,979 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:28,979 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:28,980 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:28,980 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:28,981 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:28,981 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:28,981 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:28,981 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:28,981 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:28,981 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:28,981 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:28,982 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:28,982 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:29,332 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:29,343 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:29,346 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:29,347 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:29,348 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:29,349 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbc0202-bf5d-4fbd-8347-ff818bc21dd1/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-029.smt2
[2025-04-28 21:21:29,353 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:29,357 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:29,788 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bbc0202-bf5d-4fbd-8347-ff818bc21dd1/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-029.smt2
[2025-04-28 21:21:29,792 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:29,793 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:29,794 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:29,794 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:29,794 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:29,801 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,835 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29 Unit
[2025-04-28 21:21:29,835 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:29,836 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:29,836 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:29,837 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:29,850 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,850 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,876 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,876 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,883 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,888 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,890 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,892 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,897 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,928 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:29,929 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:29,929 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:29,929 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:29,934 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (1/1) ...
[2025-04-28 21:21:29,940 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:29,959 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:29,973 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 21:21:29,977 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 21:21:29,988 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:29,989 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:29,989 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:29,989 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure state given in one single declaration
[2025-04-28 21:21:29,989 INFO  L130     BoogieDeclarations]: Found specification of procedure state
[2025-04-28 21:21:29,989 INFO  L138     BoogieDeclarations]: Found implementation of procedure state
[2025-04-28 21:21:29,989 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:29,989 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:29,990 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:30,045 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:30,047 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:30,232 INFO  L?                        ?]: Removed 1 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:30,236 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:30,255 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:30,257 INFO  L312             CfgBuilder]: Removed 0 assume(true) statements.
[2025-04-28 21:21:30,257 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:30 BoogieIcfgContainer
[2025-04-28 21:21:30,258 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:30,260 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:30,261 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:30,265 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:30,266 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:29" (1/3) ...
[2025-04-28 21:21:30,267 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37498b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:30, skipping insertion in model container
[2025-04-28 21:21:30,267 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:29" (2/3) ...
[2025-04-28 21:21:30,267 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37498b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:30, skipping insertion in model container
[2025-04-28 21:21:30,267 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:30" (3/3) ...
[2025-04-28 21:21:30,269 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:30,287 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:30,291 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 3 procedures, 13 locations, 17 edges, 3 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:30,340 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:30,353 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;@788f2bea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:30,353 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:30,357 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2025-04-28 21:21:30,364 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2025-04-28 21:21:30,365 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:30,366 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:30,366 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:30,373 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:30,374 INFO  L85        PathProgramCache]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times
[2025-04-28 21:21:30,382 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:30,383 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223442891]
[2025-04-28 21:21:30,383 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:30,384 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:30,410 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes.
[2025-04-28 21:21:30,422 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements.
[2025-04-28 21:21:30,423 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:30,423 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:30,646 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 21:21:30,647 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:30,647 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223442891]
[2025-04-28 21:21:30,648 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223442891] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:30,648 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:30,651 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:30,652 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504142215]
[2025-04-28 21:21:30,653 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:30,657 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:30,657 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:30,686 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:30,687 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:30,689 INFO  L87              Difference]: Start difference. First operand  has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2025-04-28 21:21:30,738 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:30,738 INFO  L93              Difference]: Finished difference Result 13 states and 14 transitions.
[2025-04-28 21:21:30,740 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:30,741 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 9
[2025-04-28 21:21:30,742 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:30,748 INFO  L225             Difference]: With dead ends: 13
[2025-04-28 21:21:30,750 INFO  L226             Difference]: Without dead ends: 13
[2025-04-28 21:21:30,752 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 21:21:30,757 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 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 21:21:30,759 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:30,777 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2025-04-28 21:21:30,817 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2025-04-28 21:21:30,818 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2025-04-28 21:21:30,828 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2025-04-28 21:21:30,830 INFO  L79                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9
[2025-04-28 21:21:30,830 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:30,830 INFO  L485      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2025-04-28 21:21:30,830 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2025-04-28 21:21:30,831 INFO  L278                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2025-04-28 21:21:30,832 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2025-04-28 21:21:30,832 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:30,833 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:30,833 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:30,833 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:30,834 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:30,835 INFO  L85        PathProgramCache]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times
[2025-04-28 21:21:30,835 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:30,835 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295171304]
[2025-04-28 21:21:30,835 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:30,835 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:30,860 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:30,950 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:30,950 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:30,951 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,850 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 21:21:31,851 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:31,851 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295171304]
[2025-04-28 21:21:31,851 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295171304] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:31,851 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472974636]
[2025-04-28 21:21:31,851 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:31,852 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:31,855 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:31,860 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 21:21:31,863 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:31,919 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:31,982 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:31,983 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:31,983 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,986 INFO  L256         TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:31,994 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:32,453 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 21:21:32,456 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:34,753 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 21:21:34,753 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472974636] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:34,753 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:34,753 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9
[2025-04-28 21:21:34,754 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866126555]
[2025-04-28 21:21:34,754 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:34,754 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2025-04-28 21:21:34,755 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:34,756 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2025-04-28 21:21:34,756 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2025-04-28 21:21:34,757 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 9 states, 5 states have (on average 2.0) internal successors, (10), 8 states have internal predecessors, (10), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:34,881 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:34,881 INFO  L93              Difference]: Finished difference Result 15 states and 16 transitions.
[2025-04-28 21:21:34,882 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:34,883 INFO  L79                 Accepts]: Start accepts. Automaton has  has 9 states, 5 states have (on average 2.0) internal successors, (10), 8 states have internal predecessors, (10), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 13
[2025-04-28 21:21:34,883 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:34,883 INFO  L225             Difference]: With dead ends: 15
[2025-04-28 21:21:34,883 INFO  L226             Difference]: Without dead ends: 15
[2025-04-28 21:21:34,884 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:34,884 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:34,885 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 46 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:34,885 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2025-04-28 21:21:34,890 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2025-04-28 21:21:34,891 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5)
[2025-04-28 21:21:34,891 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2025-04-28 21:21:34,891 INFO  L79                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13
[2025-04-28 21:21:34,891 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:34,892 INFO  L485      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2025-04-28 21:21:34,892 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 5 states have (on average 2.0) internal successors, (10), 8 states have internal predecessors, (10), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:34,892 INFO  L278                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2025-04-28 21:21:34,894 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2025-04-28 21:21:34,894 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:34,894 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:34,899 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:35,094 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:35,095 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:35,095 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:35,095 INFO  L85        PathProgramCache]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times
[2025-04-28 21:21:35,095 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:35,095 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099364438]
[2025-04-28 21:21:35,096 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:35,096 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:35,118 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:35,143 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:35,144 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:35,144 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:36,374 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 21:21:36,374 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:36,374 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099364438]
[2025-04-28 21:21:36,374 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099364438] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:36,374 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099624786]
[2025-04-28 21:21:36,374 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:36,375 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:36,377 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:36,380 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 21:21:36,383 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:36,451 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:36,516 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:36,516 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:36,516 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:36,524 INFO  L256         TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:36,526 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:36,981 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 21:21:36,982 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:42,517 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 21:21:42,517 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099624786] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:42,517 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:42,517 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9
[2025-04-28 21:21:42,518 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948577929]
[2025-04-28 21:21:42,518 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:42,518 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2025-04-28 21:21:42,519 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:42,519 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2025-04-28 21:21:42,521 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2025-04-28 21:21:42,521 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand  has 9 states, 5 states have (on average 2.0) internal successors, (10), 8 states have internal predecessors, (10), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:42,694 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:42,694 INFO  L93              Difference]: Finished difference Result 17 states and 18 transitions.
[2025-04-28 21:21:42,695 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:42,695 INFO  L79                 Accepts]: Start accepts. Automaton has  has 9 states, 5 states have (on average 2.0) internal successors, (10), 8 states have internal predecessors, (10), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 17
[2025-04-28 21:21:42,696 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:42,696 INFO  L225             Difference]: With dead ends: 17
[2025-04-28 21:21:42,696 INFO  L226             Difference]: Without dead ends: 17
[2025-04-28 21:21:42,697 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:42,698 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:42,698 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:42,699 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2025-04-28 21:21:42,701 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2025-04-28 21:21:42,703 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6)
[2025-04-28 21:21:42,704 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions.
[2025-04-28 21:21:42,704 INFO  L79                 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17
[2025-04-28 21:21:42,705 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:42,705 INFO  L485      AbstractCegarLoop]: Abstraction has 17 states and 18 transitions.
[2025-04-28 21:21:42,705 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 5 states have (on average 2.0) internal successors, (10), 8 states have internal predecessors, (10), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:42,705 INFO  L278                IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions.
[2025-04-28 21:21:42,706 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:42,706 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:42,707 INFO  L218           NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:42,713 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:42,911 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:42,911 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:42,912 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:42,912 INFO  L85        PathProgramCache]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times
[2025-04-28 21:21:42,912 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:42,912 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450686272]
[2025-04-28 21:21:42,912 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:42,912 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:42,929 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes.
[2025-04-28 21:21:43,011 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:43,011 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:43,012 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:45,050 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 21:21:45,050 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:45,051 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450686272]
[2025-04-28 21:21:45,051 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450686272] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:45,051 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764645815]
[2025-04-28 21:21:45,051 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:45,051 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:45,054 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:45,056 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 21:21:45,059 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:45,136 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes.
[2025-04-28 21:21:45,224 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:45,224 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:45,224 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:45,227 INFO  L256         TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:45,230 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:46,202 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 21:21:46,203 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:57,593 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 21:21:57,593 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764645815] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:57,593 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:57,594 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18
[2025-04-28 21:21:57,594 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506233827]
[2025-04-28 21:21:57,594 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:57,594 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2025-04-28 21:21:57,594 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:57,595 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2025-04-28 21:21:57,595 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306
[2025-04-28 21:21:57,596 INFO  L87              Difference]: Start difference. First operand 17 states and 18 transitions. Second operand  has 18 states, 8 states have (on average 2.375) internal successors, (19), 17 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11)
[2025-04-28 21:21:58,231 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:58,231 INFO  L93              Difference]: Finished difference Result 19 states and 20 transitions.
[2025-04-28 21:21:58,232 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:21:58,232 INFO  L79                 Accepts]: Start accepts. Automaton has  has 18 states, 8 states have (on average 2.375) internal successors, (19), 17 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) Word has length 21
[2025-04-28 21:21:58,232 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:58,233 INFO  L225             Difference]: With dead ends: 19
[2025-04-28 21:21:58,233 INFO  L226             Difference]: Without dead ends: 19
[2025-04-28 21:21:58,233 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462
[2025-04-28 21:21:58,234 INFO  L437           NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:58,234 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:58,235 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2025-04-28 21:21:58,238 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2025-04-28 21:21:58,238 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7)
[2025-04-28 21:21:58,239 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions.
[2025-04-28 21:21:58,239 INFO  L79                 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21
[2025-04-28 21:21:58,239 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:58,239 INFO  L485      AbstractCegarLoop]: Abstraction has 19 states and 20 transitions.
[2025-04-28 21:21:58,239 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 8 states have (on average 2.375) internal successors, (19), 17 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11)
[2025-04-28 21:21:58,239 INFO  L278                IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions.
[2025-04-28 21:21:58,240 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2025-04-28 21:21:58,240 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:58,240 INFO  L218           NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:58,247 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2025-04-28 21:21:58,444 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:58,444 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:58,445 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:58,445 INFO  L85        PathProgramCache]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times
[2025-04-28 21:21:58,445 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:58,445 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485315158]
[2025-04-28 21:21:58,445 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:58,445 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:58,465 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes.
[2025-04-28 21:21:58,497 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 25 statements.
[2025-04-28 21:21:58,498 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s)
[2025-04-28 21:21:58,498 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
