./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-050.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:21,009 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:21,116 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17c266-3e6d-4957-9b2d-3f90c05710ac/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:21,125 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:21,125 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:21,160 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:21,161 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:21,162 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:21,163 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:21,164 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:21,164 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:21,165 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:21,165 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:21,165 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:21,165 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:21,167 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:21,167 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:21,167 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:21,167 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:21,167 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:21,167 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:21,167 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:21,168 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:21,168 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:21,168 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:21,168 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:21,169 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:21,533 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:21,546 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:21,549 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:21,553 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:21,553 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:21,555 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17c266-3e6d-4957-9b2d-3f90c05710ac/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-050.smt2
[2025-04-28 21:21:21,558 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:21,565 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:21,768 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b17c266-3e6d-4957-9b2d-3f90c05710ac/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-050.smt2
[2025-04-28 21:21:21,773 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:21,776 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:21,778 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:21,778 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:21,778 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:21,786 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,815 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21 Unit
[2025-04-28 21:21:21,816 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:21,817 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:21,817 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:21,817 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:21,836 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,836 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,868 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,868 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,872 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,873 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,876 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,878 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,878 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,897 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:21,898 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:21,898 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:21,898 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:21,902 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,905 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:21,923 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:21,939 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 21:21:21,943 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 21:21:21,955 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:21,955 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:21,955 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:21,955 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure ERR given in one single declaration
[2025-04-28 21:21:21,955 INFO  L130     BoogieDeclarations]: Found specification of procedure ERR
[2025-04-28 21:21:21,955 INFO  L138     BoogieDeclarations]: Found implementation of procedure ERR
[2025-04-28 21:21:21,956 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure MAIN given in one single declaration
[2025-04-28 21:21:21,956 INFO  L130     BoogieDeclarations]: Found specification of procedure MAIN
[2025-04-28 21:21:21,956 INFO  L138     BoogieDeclarations]: Found implementation of procedure MAIN
[2025-04-28 21:21:21,956 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure top_reset given in one single declaration
[2025-04-28 21:21:21,956 INFO  L130     BoogieDeclarations]: Found specification of procedure top_reset
[2025-04-28 21:21:21,956 INFO  L138     BoogieDeclarations]: Found implementation of procedure top_reset
[2025-04-28 21:21:21,956 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure INIT_STATE given in one single declaration
[2025-04-28 21:21:21,956 INFO  L130     BoogieDeclarations]: Found specification of procedure INIT_STATE
[2025-04-28 21:21:21,956 INFO  L138     BoogieDeclarations]: Found implementation of procedure INIT_STATE
[2025-04-28 21:21:21,956 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure top_step given in one single declaration
[2025-04-28 21:21:21,956 INFO  L130     BoogieDeclarations]: Found specification of procedure top_step
[2025-04-28 21:21:21,956 INFO  L138     BoogieDeclarations]: Found implementation of procedure top_step
[2025-04-28 21:21:21,957 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:21,957 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:21,957 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:22,041 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:22,044 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:22,198 INFO  L?                        ?]: Removed 8 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:22,198 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:22,215 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:22,215 INFO  L312             CfgBuilder]: Removed 4 assume(true) statements.
[2025-04-28 21:21:22,216 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:22 BoogieIcfgContainer
[2025-04-28 21:21:22,216 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:22,220 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:22,220 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:22,227 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:22,227 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:21" (1/3) ...
[2025-04-28 21:21:22,228 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f188f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:22, skipping insertion in model container
[2025-04-28 21:21:22,229 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (2/3) ...
[2025-04-28 21:21:22,229 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f188f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:22, skipping insertion in model container
[2025-04-28 21:21:22,229 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:22" (3/3) ...
[2025-04-28 21:21:22,232 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:22,249 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:22,251 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 7 procedures, 26 locations, 36 edges, 7 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:22,299 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:22,313 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;@59746558, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:22,313 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:22,318 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 26 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8)
[2025-04-28 21:21:22,327 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2025-04-28 21:21:22,328 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:22,328 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:22,329 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:22,336 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:22,336 INFO  L85        PathProgramCache]: Analyzing trace with hash -2087563048, now seen corresponding path program 1 times
[2025-04-28 21:21:22,345 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:22,345 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334394984]
[2025-04-28 21:21:22,346 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:22,346 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:22,394 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes.
[2025-04-28 21:21:22,413 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements.
[2025-04-28 21:21:22,417 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:22,417 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:22,884 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 21:21:22,886 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:22,887 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334394984]
[2025-04-28 21:21:22,887 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334394984] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:22,890 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:22,896 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:22,899 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196205721]
[2025-04-28 21:21:22,900 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:22,906 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:22,907 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:22,939 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:22,940 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:22,942 INFO  L87              Difference]: Start difference. First operand  has 26 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Second operand  has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2025-04-28 21:21:23,056 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:23,057 INFO  L93              Difference]: Finished difference Result 26 states and 28 transitions.
[2025-04-28 21:21:23,058 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:23,060 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 22
[2025-04-28 21:21:23,060 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:23,068 INFO  L225             Difference]: With dead ends: 26
[2025-04-28 21:21:23,068 INFO  L226             Difference]: Without dead ends: 26
[2025-04-28 21:21:23,070 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2025-04-28 21:21:23,075 INFO  L437           NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:23,080 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 120 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:23,100 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2025-04-28 21:21:23,134 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2025-04-28 21:21:23,137 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 26 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 7 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9)
[2025-04-28 21:21:23,143 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions.
[2025-04-28 21:21:23,145 INFO  L79                 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22
[2025-04-28 21:21:23,147 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:23,147 INFO  L485      AbstractCegarLoop]: Abstraction has 26 states and 28 transitions.
[2025-04-28 21:21:23,147 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2025-04-28 21:21:23,147 INFO  L278                IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions.
[2025-04-28 21:21:23,149 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2025-04-28 21:21:23,151 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:23,151 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:23,151 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:23,152 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:23,152 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:23,154 INFO  L85        PathProgramCache]: Analyzing trace with hash 2099557298, now seen corresponding path program 1 times
[2025-04-28 21:21:23,154 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:23,154 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648371511]
[2025-04-28 21:21:23,154 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:23,154 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:23,171 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes.
[2025-04-28 21:21:23,185 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements.
[2025-04-28 21:21:23,185 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:23,185 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:23,963 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2025-04-28 21:21:23,963 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:23,963 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648371511]
[2025-04-28 21:21:23,963 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648371511] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:23,963 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571561682]
[2025-04-28 21:21:23,963 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:23,964 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:24,002 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:24,006 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 21:21:24,011 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:24,081 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes.
[2025-04-28 21:21:24,124 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements.
[2025-04-28 21:21:24,125 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:24,125 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:24,128 INFO  L256         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:24,137 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:24,995 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2025-04-28 21:21:24,995 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:30,243 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2025-04-28 21:21:30,244 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [571561682] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:30,244 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:30,244 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17
[2025-04-28 21:21:30,245 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804594184]
[2025-04-28 21:21:30,245 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:30,246 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2025-04-28 21:21:30,246 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:30,247 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2025-04-28 21:21:30,248 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272
[2025-04-28 21:21:30,248 INFO  L87              Difference]: Start difference. First operand 26 states and 28 transitions. Second operand  has 17 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 7 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15)
[2025-04-28 21:21:30,396 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:30,397 INFO  L93              Difference]: Finished difference Result 29 states and 31 transitions.
[2025-04-28 21:21:30,398 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2025-04-28 21:21:30,398 INFO  L79                 Accepts]: Start accepts. Automaton has  has 17 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 7 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) Word has length 29
[2025-04-28 21:21:30,399 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:30,399 INFO  L225             Difference]: With dead ends: 29
[2025-04-28 21:21:30,400 INFO  L226             Difference]: Without dead ends: 29
[2025-04-28 21:21:30,400 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:21:30,401 INFO  L437           NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:30,401 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:30,402 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2025-04-28 21:21:30,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28.
[2025-04-28 21:21:30,406 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 12 states have (on average 1.0) internal successors, (12), 12 states have internal predecessors, (12), 7 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10)
[2025-04-28 21:21:30,406 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions.
[2025-04-28 21:21:30,407 INFO  L79                 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 29
[2025-04-28 21:21:30,407 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:30,407 INFO  L485      AbstractCegarLoop]: Abstraction has 28 states and 30 transitions.
[2025-04-28 21:21:30,407 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 7 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15)
[2025-04-28 21:21:30,407 INFO  L278                IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions.
[2025-04-28 21:21:30,408 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2025-04-28 21:21:30,408 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:30,409 INFO  L218           NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:30,418 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:30,609 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:30,609 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:30,610 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:30,610 INFO  L85        PathProgramCache]: Analyzing trace with hash -759971024, now seen corresponding path program 2 times
[2025-04-28 21:21:30,610 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:30,611 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813968129]
[2025-04-28 21:21:30,611 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:30,611 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:30,622 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes.
[2025-04-28 21:21:30,629 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements.
[2025-04-28 21:21:30,629 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:30,629 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,347 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:31,348 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:31,348 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813968129]
[2025-04-28 21:21:31,348 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813968129] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:31,348 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410710749]
[2025-04-28 21:21:31,348 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:31,348 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:31,351 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:31,353 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 21:21:31,358 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:31,428 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes.
[2025-04-28 21:21:31,453 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements.
[2025-04-28 21:21:31,453 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:31,454 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,455 INFO  L256         TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 32 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:31,458 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:32,015 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:32,015 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:39,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:39,896 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [410710749] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:39,896 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:39,896 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23
[2025-04-28 21:21:39,896 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559672149]
[2025-04-28 21:21:39,896 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:39,897 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2025-04-28 21:21:39,897 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:39,898 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2025-04-28 21:21:39,898 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506
[2025-04-28 21:21:39,898 INFO  L87              Difference]: Start difference. First operand 28 states and 30 transitions. Second operand  has 23 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 9 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (19), 14 states have call predecessors, (19), 9 states have call successors, (19)
[2025-04-28 21:21:40,240 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:40,240 INFO  L93              Difference]: Finished difference Result 31 states and 33 transitions.
[2025-04-28 21:21:40,241 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2025-04-28 21:21:40,241 INFO  L79                 Accepts]: Start accepts. Automaton has  has 23 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 9 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (19), 14 states have call predecessors, (19), 9 states have call successors, (19) Word has length 36
[2025-04-28 21:21:40,241 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:40,242 INFO  L225             Difference]: With dead ends: 31
[2025-04-28 21:21:40,242 INFO  L226             Difference]: Without dead ends: 31
[2025-04-28 21:21:40,243 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812
[2025-04-28 21:21:40,243 INFO  L437           NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:40,244 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 315 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:40,244 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2025-04-28 21:21:40,248 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30.
[2025-04-28 21:21:40,248 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 13 states have (on average 1.0) internal successors, (13), 13 states have internal predecessors, (13), 7 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11)
[2025-04-28 21:21:40,249 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions.
[2025-04-28 21:21:40,249 INFO  L79                 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 36
[2025-04-28 21:21:40,249 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:40,249 INFO  L485      AbstractCegarLoop]: Abstraction has 30 states and 32 transitions.
[2025-04-28 21:21:40,250 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 23 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 9 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (19), 14 states have call predecessors, (19), 9 states have call successors, (19)
[2025-04-28 21:21:40,250 INFO  L278                IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions.
[2025-04-28 21:21:40,251 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2025-04-28 21:21:40,251 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:40,251 INFO  L218           NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:40,255 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:40,451 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:40,451 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:40,452 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:40,452 INFO  L85        PathProgramCache]: Analyzing trace with hash -1606623350, now seen corresponding path program 3 times
[2025-04-28 21:21:40,452 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:40,452 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455530132]
[2025-04-28 21:21:40,452 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:40,452 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:40,469 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 4 equivalence classes.
[2025-04-28 21:21:40,479 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 43 of 43 statements.
[2025-04-28 21:21:40,480 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:40,480 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:41,809 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2025-04-28 21:21:41,810 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:41,810 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455530132]
[2025-04-28 21:21:41,810 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455530132] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:41,810 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422406344]
[2025-04-28 21:21:41,810 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:41,810 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:41,812 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:41,815 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 21:21:41,818 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:41,941 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 4 equivalence classes.
[2025-04-28 21:21:41,970 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 43 of 43 statements.
[2025-04-28 21:21:41,970 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:41,970 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:41,972 INFO  L256         TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 55 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:41,975 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:43,411 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2025-04-28 21:21:43,411 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
