./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-069.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:36,690 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:36,793 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7dabef-ecb5-4f08-adfa-7892e1783a16/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:36,801 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:36,801 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:36,838 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:36,839 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:36,839 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:36,839 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:36,839 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:36,840 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:36,840 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:36,840 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:36,840 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:36,841 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:36,842 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:36,842 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:36,842 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:36,842 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:36,843 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:36,843 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:36,843 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:36,843 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:36,843 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:36,843 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:36,844 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:36,844 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:37,185 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:37,196 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:37,198 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:37,201 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:37,201 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:37,202 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7dabef-ecb5-4f08-adfa-7892e1783a16/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-069.smt2
[2025-04-28 21:21:37,204 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:37,210 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:37,529 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7dabef-ecb5-4f08-adfa-7892e1783a16/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-069.smt2
[2025-04-28 21:21:37,534 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:37,535 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:37,536 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:37,536 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:37,536 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:37,540 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,587 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37 Unit
[2025-04-28 21:21:37,587 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:37,588 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:37,589 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:37,589 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:37,605 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,605 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,641 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,641 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,646 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,649 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,655 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,657 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,659 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,674 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:37,679 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:37,679 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:37,679 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:37,680 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (1/1) ...
[2025-04-28 21:21:37,683 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:37,700 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:37,715 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 21:21:37,721 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 21:21:37,734 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:37,734 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:37,735 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:37,735 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure realizable given in one single declaration
[2025-04-28 21:21:37,735 INFO  L130     BoogieDeclarations]: Found specification of procedure realizable
[2025-04-28 21:21:37,735 INFO  L138     BoogieDeclarations]: Found implementation of procedure realizable
[2025-04-28 21:21:37,735 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcStart__sem given in one single declaration
[2025-04-28 21:21:37,735 INFO  L130     BoogieDeclarations]: Found specification of procedure funcStart__sem
[2025-04-28 21:21:37,735 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcStart__sem
[2025-04-28 21:21:37,735 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS__sem given in one single declaration
[2025-04-28 21:21:37,735 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS__sem
[2025-04-28 21:21:37,735 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS__sem
[2025-04-28 21:21:37,736 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcE__sem given in one single declaration
[2025-04-28 21:21:37,736 INFO  L130     BoogieDeclarations]: Found specification of procedure funcE__sem
[2025-04-28 21:21:37,736 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcE__sem
[2025-04-28 21:21:37,736 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcA__sem given in one single declaration
[2025-04-28 21:21:37,738 INFO  L130     BoogieDeclarations]: Found specification of procedure funcA__sem
[2025-04-28 21:21:37,738 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcA__sem
[2025-04-28 21:21:37,738 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcB__sem given in one single declaration
[2025-04-28 21:21:37,738 INFO  L130     BoogieDeclarations]: Found specification of procedure funcB__sem
[2025-04-28 21:21:37,738 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcB__sem
[2025-04-28 21:21:37,739 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:37,739 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:37,739 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:37,858 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:37,860 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:38,162 INFO  L?                        ?]: Removed 18 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:38,162 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:38,180 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:38,180 INFO  L312             CfgBuilder]: Removed 1 assume(true) statements.
[2025-04-28 21:21:38,180 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:38 BoogieIcfgContainer
[2025-04-28 21:21:38,181 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:38,183 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:38,183 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:38,187 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:38,188 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:37" (1/3) ...
[2025-04-28 21:21:38,188 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d561d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:38, skipping insertion in model container
[2025-04-28 21:21:38,188 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:37" (2/3) ...
[2025-04-28 21:21:38,188 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d561d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:38, skipping insertion in model container
[2025-04-28 21:21:38,188 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:38" (3/3) ...
[2025-04-28 21:21:38,190 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:38,204 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:38,207 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 8 procedures, 41 locations, 74 edges, 8 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:38,257 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:38,274 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;@60541b9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:38,274 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:38,278 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 41 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 21 states have internal predecessors, (23), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17)
[2025-04-28 21:21:38,287 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2025-04-28 21:21:38,287 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:38,288 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:38,289 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:38,294 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:38,295 INFO  L85        PathProgramCache]: Analyzing trace with hash 1925693344, now seen corresponding path program 1 times
[2025-04-28 21:21:38,304 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:38,304 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113395909]
[2025-04-28 21:21:38,304 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:38,305 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:38,333 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes.
[2025-04-28 21:21:38,365 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements.
[2025-04-28 21:21:38,368 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:38,368 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:38,559 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 21:21:38,561 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:38,564 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113395909]
[2025-04-28 21:21:38,564 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113395909] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:38,565 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:38,569 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:38,571 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904145391]
[2025-04-28 21:21:38,572 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:38,580 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:38,580 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:38,615 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:38,616 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:38,618 INFO  L87              Difference]: Start difference. First operand  has 41 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 21 states have internal predecessors, (23), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) Second operand  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:21:38,690 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:38,692 INFO  L93              Difference]: Finished difference Result 41 states and 57 transitions.
[2025-04-28 21:21:38,694 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:38,696 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 12
[2025-04-28 21:21:38,697 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:38,706 INFO  L225             Difference]: With dead ends: 41
[2025-04-28 21:21:38,706 INFO  L226             Difference]: Without dead ends: 41
[2025-04-28 21:21:38,709 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 21:21:38,713 INFO  L437           NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 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 21:21:38,714 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:38,788 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2025-04-28 21:21:38,869 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41.
[2025-04-28 21:21:38,870 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 41 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 20 states have internal predecessors, (22), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (18), 13 states have call predecessors, (18), 17 states have call successors, (18)
[2025-04-28 21:21:38,879 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions.
[2025-04-28 21:21:38,880 INFO  L79                 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 12
[2025-04-28 21:21:38,880 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:38,880 INFO  L485      AbstractCegarLoop]: Abstraction has 41 states and 57 transitions.
[2025-04-28 21:21:38,881 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:21:38,881 INFO  L278                IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions.
[2025-04-28 21:21:38,885 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2025-04-28 21:21:38,886 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:38,886 INFO  L218           NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:21:38,886 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:38,886 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:38,887 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:38,887 INFO  L85        PathProgramCache]: Analyzing trace with hash 2013640630, now seen corresponding path program 1 times
[2025-04-28 21:21:38,888 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:38,888 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775738451]
[2025-04-28 21:21:38,888 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:38,888 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:38,950 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes.
[2025-04-28 21:21:39,032 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements.
[2025-04-28 21:21:39,032 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:39,032 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:39,779 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2025-04-28 21:21:39,780 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:39,780 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775738451]
[2025-04-28 21:21:39,780 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775738451] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:39,780 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403863934]
[2025-04-28 21:21:39,780 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:39,780 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:39,785 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:39,790 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 21:21:39,792 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:39,947 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes.
[2025-04-28 21:21:40,115 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements.
[2025-04-28 21:21:40,115 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:40,115 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:40,120 INFO  L256         TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 10 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:40,131 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:40,443 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2025-04-28 21:21:40,444 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:41,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2025-04-28 21:21:41,224 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [403863934] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:41,224 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:41,224 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12
[2025-04-28 21:21:41,225 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245498185]
[2025-04-28 21:21:41,225 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:41,226 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2025-04-28 21:21:41,227 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:41,229 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2025-04-28 21:21:41,229 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:41,230 INFO  L87              Difference]: Start difference. First operand 41 states and 57 transitions. Second operand  has 12 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (19), 1 states have call predecessors, (19), 6 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19)
[2025-04-28 21:21:41,478 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:41,478 INFO  L93              Difference]: Finished difference Result 43 states and 59 transitions.
[2025-04-28 21:21:41,482 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:41,482 INFO  L79                 Accepts]: Start accepts. Automaton has  has 12 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (19), 1 states have call predecessors, (19), 6 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 44
[2025-04-28 21:21:41,483 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:41,484 INFO  L225             Difference]: With dead ends: 43
[2025-04-28 21:21:41,484 INFO  L226             Difference]: Without dead ends: 43
[2025-04-28 21:21:41,484 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240
[2025-04-28 21:21:41,485 INFO  L437           NwaCegarLoop]: 54 mSDtfsCounter, 6 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:41,485 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 396 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:41,486 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2025-04-28 21:21:41,498 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43.
[2025-04-28 21:21:41,498 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43 states, 16 states have (on average 1.4375) internal successors, (23), 21 states have internal predecessors, (23), 17 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (19), 14 states have call predecessors, (19), 17 states have call successors, (19)
[2025-04-28 21:21:41,499 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions.
[2025-04-28 21:21:41,500 INFO  L79                 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 44
[2025-04-28 21:21:41,502 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:41,502 INFO  L485      AbstractCegarLoop]: Abstraction has 43 states and 59 transitions.
[2025-04-28 21:21:41,503 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (19), 1 states have call predecessors, (19), 6 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19)
[2025-04-28 21:21:41,503 INFO  L278                IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions.
[2025-04-28 21:21:41,506 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2025-04-28 21:21:41,506 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:41,508 INFO  L218           NwaCegarLoop]: trace histogram [8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:41,514 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:41,712 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:41,713 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:41,713 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:41,714 INFO  L85        PathProgramCache]: Analyzing trace with hash -193679796, now seen corresponding path program 2 times
[2025-04-28 21:21:41,714 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:41,714 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723046272]
[2025-04-28 21:21:41,714 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:41,714 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:41,749 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes.
[2025-04-28 21:21:41,814 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements.
[2025-04-28 21:21:41,814 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:41,814 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:42,723 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked.
[2025-04-28 21:21:42,726 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:42,726 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723046272]
[2025-04-28 21:21:42,726 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723046272] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:42,726 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228293507]
[2025-04-28 21:21:42,727 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:42,727 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:42,729 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:42,731 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 21:21:42,734 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:42,879 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes.
[2025-04-28 21:21:43,062 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements.
[2025-04-28 21:21:43,062 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:43,062 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:43,067 INFO  L256         TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 13 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:43,072 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:43,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked.
[2025-04-28 21:21:43,333 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:44,665 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked.
[2025-04-28 21:21:44,668 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [228293507] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:44,668 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:44,671 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18
[2025-04-28 21:21:44,671 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641488609]
[2025-04-28 21:21:44,671 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:44,672 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2025-04-28 21:21:44,672 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:44,673 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2025-04-28 21:21:44,673 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306
[2025-04-28 21:21:44,673 INFO  L87              Difference]: Start difference. First operand 43 states and 59 transitions. Second operand  has 18 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 16 states have internal predecessors, (31), 12 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23)
[2025-04-28 21:21:45,158 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:45,158 INFO  L93              Difference]: Finished difference Result 56 states and 85 transitions.
[2025-04-28 21:21:45,159 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2025-04-28 21:21:45,159 INFO  L79                 Accepts]: Start accepts. Automaton has  has 18 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 16 states have internal predecessors, (31), 12 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) Word has length 76
[2025-04-28 21:21:45,159 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:45,161 INFO  L225             Difference]: With dead ends: 56
[2025-04-28 21:21:45,161 INFO  L226             Difference]: Without dead ends: 56
[2025-04-28 21:21:45,161 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600
[2025-04-28 21:21:45,162 INFO  L437           NwaCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:45,163 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 535 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2025-04-28 21:21:45,164 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2025-04-28 21:21:45,171 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50.
[2025-04-28 21:21:45,172 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 24 states have internal predecessors, (25), 20 states have call successors, (20), 7 states have call predecessors, (20), 11 states have return successors, (32), 18 states have call predecessors, (32), 20 states have call successors, (32)
[2025-04-28 21:21:45,173 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 77 transitions.
[2025-04-28 21:21:45,173 INFO  L79                 Accepts]: Start accepts. Automaton has 50 states and 77 transitions. Word has length 76
[2025-04-28 21:21:45,174 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:45,174 INFO  L485      AbstractCegarLoop]: Abstraction has 50 states and 77 transitions.
[2025-04-28 21:21:45,174 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 16 states have internal predecessors, (31), 12 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23)
[2025-04-28 21:21:45,174 INFO  L278                IsEmpty]: Start isEmpty. Operand 50 states and 77 transitions.
[2025-04-28 21:21:45,176 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2025-04-28 21:21:45,176 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:45,177 INFO  L218           NwaCegarLoop]: trace histogram [8, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:45,183 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:45,380 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:45,381 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:45,381 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:45,381 INFO  L85        PathProgramCache]: Analyzing trace with hash 2044996430, now seen corresponding path program 1 times
[2025-04-28 21:21:45,381 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:45,381 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82557040]
[2025-04-28 21:21:45,381 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:45,382 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:45,419 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes.
[2025-04-28 21:21:45,474 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements.
[2025-04-28 21:21:45,475 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:45,475 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:46,911 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked.
[2025-04-28 21:21:46,911 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:46,911 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82557040]
[2025-04-28 21:21:46,911 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82557040] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:46,911 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953603524]
[2025-04-28 21:21:46,911 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:46,911 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:46,914 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:46,916 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 21:21:46,919 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:47,059 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes.
[2025-04-28 21:21:47,226 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements.
[2025-04-28 21:21:47,226 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:47,226 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:47,232 INFO  L256         TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 48 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:47,237 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:48,641 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2025-04-28 21:21:48,642 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:59,571 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked.
[2025-04-28 21:21:59,571 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953603524] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:59,571 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:59,571 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 26] total 49
[2025-04-28 21:21:59,572 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737608965]
[2025-04-28 21:21:59,572 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:59,573 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 49 states
[2025-04-28 21:21:59,573 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:59,574 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants.
[2025-04-28 21:21:59,575 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2175, Unknown=0, NotChecked=0, Total=2352
[2025-04-28 21:21:59,576 INFO  L87              Difference]: Start difference. First operand 50 states and 77 transitions. Second operand  has 49 states, 19 states have (on average 2.789473684210526) internal successors, (53), 35 states have internal predecessors, (53), 32 states have call successors, (41), 1 states have call predecessors, (41), 19 states have return successors, (43), 26 states have call predecessors, (43), 32 states have call successors, (43)
[2025-04-28 21:22:02,832 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:02,833 INFO  L93              Difference]: Finished difference Result 93 states and 200 transitions.
[2025-04-28 21:22:02,833 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2025-04-28 21:22:02,834 INFO  L79                 Accepts]: Start accepts. Automaton has  has 49 states, 19 states have (on average 2.789473684210526) internal successors, (53), 35 states have internal predecessors, (53), 32 states have call successors, (41), 1 states have call predecessors, (41), 19 states have return successors, (43), 26 states have call predecessors, (43), 32 states have call successors, (43) Word has length 76
[2025-04-28 21:22:02,834 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:02,837 INFO  L225             Difference]: With dead ends: 93
[2025-04-28 21:22:02,840 INFO  L226             Difference]: Without dead ends: 93
[2025-04-28 21:22:02,842 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=464, Invalid=4092, Unknown=0, NotChecked=0, Total=4556
[2025-04-28 21:22:02,846 INFO  L437           NwaCegarLoop]: 51 mSDtfsCounter, 52 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:02,847 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1295 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time]
[2025-04-28 21:22:02,848 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2025-04-28 21:22:02,898 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71.
[2025-04-28 21:22:02,901 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 71 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 33 states have internal predecessors, (33), 25 states have call successors, (25), 7 states have call predecessors, (25), 19 states have return successors, (81), 30 states have call predecessors, (81), 25 states have call successors, (81)
[2025-04-28 21:22:02,904 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 139 transitions.
[2025-04-28 21:22:02,908 INFO  L79                 Accepts]: Start accepts. Automaton has 71 states and 139 transitions. Word has length 76
[2025-04-28 21:22:02,909 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:02,909 INFO  L485      AbstractCegarLoop]: Abstraction has 71 states and 139 transitions.
[2025-04-28 21:22:02,909 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 49 states, 19 states have (on average 2.789473684210526) internal successors, (53), 35 states have internal predecessors, (53), 32 states have call successors, (41), 1 states have call predecessors, (41), 19 states have return successors, (43), 26 states have call predecessors, (43), 32 states have call successors, (43)
[2025-04-28 21:22:02,909 INFO  L278                IsEmpty]: Start isEmpty. Operand 71 states and 139 transitions.
[2025-04-28 21:22:02,912 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2025-04-28 21:22:02,916 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:02,916 INFO  L218           NwaCegarLoop]: trace histogram [8, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:02,924 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2025-04-28 21:22:03,117 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:03,117 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:03,118 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:03,118 INFO  L85        PathProgramCache]: Analyzing trace with hash -1598058450, now seen corresponding path program 1 times
[2025-04-28 21:22:03,118 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:03,118 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790866024]
[2025-04-28 21:22:03,118 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:03,118 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:03,140 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes.
[2025-04-28 21:22:03,171 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements.
[2025-04-28 21:22:03,171 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:03,171 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:03,757 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked.
[2025-04-28 21:22:03,757 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:03,757 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790866024]
[2025-04-28 21:22:03,757 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790866024] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:03,757 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689302051]
[2025-04-28 21:22:03,757 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:03,757 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:03,761 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:03,764 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:22:03,767 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2025-04-28 21:22:03,959 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes.
[2025-04-28 21:22:04,104 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements.
[2025-04-28 21:22:04,104 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:04,104 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:04,114 INFO  L256         TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 17 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:04,120 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:04,262 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked.
[2025-04-28 21:22:04,262 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:05,978 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked.
[2025-04-28 21:22:05,978 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [689302051] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:05,978 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:05,979 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16
[2025-04-28 21:22:05,979 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469976157]
[2025-04-28 21:22:05,979 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:05,979 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2025-04-28 21:22:05,980 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:05,980 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2025-04-28 21:22:05,981 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240
[2025-04-28 21:22:05,981 INFO  L87              Difference]: Start difference. First operand 71 states and 139 transitions. Second operand  has 16 states, 7 states have (on average 4.285714285714286) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (21), 1 states have call predecessors, (21), 7 states have return successors, (22), 6 states have call predecessors, (22), 11 states have call successors, (22)
[2025-04-28 21:22:06,304 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:06,305 INFO  L93              Difference]: Finished difference Result 81 states and 173 transitions.
[2025-04-28 21:22:06,305 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2025-04-28 21:22:06,305 INFO  L79                 Accepts]: Start accepts. Automaton has  has 16 states, 7 states have (on average 4.285714285714286) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (21), 1 states have call predecessors, (21), 7 states have return successors, (22), 6 states have call predecessors, (22), 11 states have call successors, (22) Word has length 76
[2025-04-28 21:22:06,306 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:06,310 INFO  L225             Difference]: With dead ends: 81
[2025-04-28 21:22:06,310 INFO  L226             Difference]: Without dead ends: 81
[2025-04-28 21:22:06,310 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:22:06,311 INFO  L437           NwaCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:06,312 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 439 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2025-04-28 21:22:06,312 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81 states.
[2025-04-28 21:22:06,326 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71.
[2025-04-28 21:22:06,327 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 71 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 33 states have internal predecessors, (33), 25 states have call successors, (25), 7 states have call predecessors, (25), 19 states have return successors, (81), 30 states have call predecessors, (81), 25 states have call successors, (81)
[2025-04-28 21:22:06,328 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 139 transitions.
[2025-04-28 21:22:06,329 INFO  L79                 Accepts]: Start accepts. Automaton has 71 states and 139 transitions. Word has length 76
[2025-04-28 21:22:06,329 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:06,329 INFO  L485      AbstractCegarLoop]: Abstraction has 71 states and 139 transitions.
[2025-04-28 21:22:06,329 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 7 states have (on average 4.285714285714286) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (21), 1 states have call predecessors, (21), 7 states have return successors, (22), 6 states have call predecessors, (22), 11 states have call successors, (22)
[2025-04-28 21:22:06,329 INFO  L278                IsEmpty]: Start isEmpty. Operand 71 states and 139 transitions.
[2025-04-28 21:22:06,331 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2025-04-28 21:22:06,332 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:06,332 INFO  L218           NwaCegarLoop]: trace histogram [8, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:06,339 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2025-04-28 21:22:06,536 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2025-04-28 21:22:06,537 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:06,537 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:06,537 INFO  L85        PathProgramCache]: Analyzing trace with hash -2099024050, now seen corresponding path program 2 times
[2025-04-28 21:22:06,537 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:06,537 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694336947]
[2025-04-28 21:22:06,537 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:22:06,537 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:06,560 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes.
[2025-04-28 21:22:06,588 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements.
[2025-04-28 21:22:06,589 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:22:06,589 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:07,185 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked.
[2025-04-28 21:22:07,185 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:07,185 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694336947]
[2025-04-28 21:22:07,186 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694336947] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:07,186 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149792431]
[2025-04-28 21:22:07,186 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:22:07,186 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:07,189 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:07,191 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:22:07,194 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2025-04-28 21:22:07,394 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes.
