./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-190.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:51,761 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:51,856 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbb96371-abe5-4154-9474-9dfc3bc217f4/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:51,861 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:51,862 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:51,884 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:51,885 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:51,885 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:51,885 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:51,885 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:51,886 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:51,886 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:51,886 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:51,886 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:51,886 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:51,887 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:51,887 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:51,887 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:51,887 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:51,887 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:51,887 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:51,888 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:51,888 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:51,888 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:51,888 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:51,889 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:51,889 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:52,249 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:52,263 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:52,266 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:52,269 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:52,269 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:52,270 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbb96371-abe5-4154-9474-9dfc3bc217f4/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-190.smt2
[2025-04-28 21:21:52,274 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:52,281 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:52,862 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbb96371-abe5-4154-9474-9dfc3bc217f4/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-190.smt2
[2025-04-28 21:21:52,868 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:52,870 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:52,871 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:52,871 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:52,872 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:52,874 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:52,923 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52 Unit
[2025-04-28 21:21:52,923 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:52,924 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:52,924 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:52,925 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:52,946 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:52,947 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:52,980 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:52,980 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:52,989 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:52,992 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:52,998 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:53,002 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:53,003 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:53,021 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:53,022 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:53,022 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:53,022 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:53,023 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (1/1) ...
[2025-04-28 21:21:53,026 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:53,041 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:53,056 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 21:21:53,061 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 21:21:53,078 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:53,079 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:53,079 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:53,080 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure CHC_COMP_FALSE given in one single declaration
[2025-04-28 21:21:53,081 INFO  L130     BoogieDeclarations]: Found specification of procedure CHC_COMP_FALSE
[2025-04-28 21:21:53,081 INFO  L138     BoogieDeclarations]: Found implementation of procedure CHC_COMP_FALSE
[2025-04-28 21:21:53,081 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure step_lturn given in one single declaration
[2025-04-28 21:21:53,081 INFO  L130     BoogieDeclarations]: Found specification of procedure step_lturn
[2025-04-28 21:21:53,081 INFO  L138     BoogieDeclarations]: Found implementation of procedure step_lturn
[2025-04-28 21:21:53,081 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure combined_lturn given in one single declaration
[2025-04-28 21:21:53,081 INFO  L130     BoogieDeclarations]: Found specification of procedure combined_lturn
[2025-04-28 21:21:53,081 INFO  L138     BoogieDeclarations]: Found implementation of procedure combined_lturn
[2025-04-28 21:21:53,081 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure lturn given in one single declaration
[2025-04-28 21:21:53,081 INFO  L130     BoogieDeclarations]: Found specification of procedure lturn
[2025-04-28 21:21:53,082 INFO  L138     BoogieDeclarations]: Found implementation of procedure lturn
[2025-04-28 21:21:53,082 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:53,082 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:53,082 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:53,159 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:53,164 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:53,862 INFO  L?                        ?]: Removed 0 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:53,863 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:53,879 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:53,880 INFO  L312             CfgBuilder]: Removed 7 assume(true) statements.
[2025-04-28 21:21:53,880 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:53 BoogieIcfgContainer
[2025-04-28 21:21:53,881 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:53,883 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:53,884 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:53,889 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:53,889 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:52" (1/3) ...
[2025-04-28 21:21:53,890 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599f691b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:53, skipping insertion in model container
[2025-04-28 21:21:53,890 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:52" (2/3) ...
[2025-04-28 21:21:53,891 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599f691b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:53, skipping insertion in model container
[2025-04-28 21:21:53,891 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:53" (3/3) ...
[2025-04-28 21:21:53,892 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:53,912 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:53,915 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 6 procedures, 142 locations, 427 edges, 6 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:53,966 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:53,981 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;@1441b7c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:53,981 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:53,986 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 142 states, 10 states have (on average 3.7) internal successors, (37), 36 states have internal predecessors, (37), 128 states have call successors, (130), 5 states have call predecessors, (130), 5 states have return successors, (130), 102 states have call predecessors, (130), 128 states have call successors, (130)
[2025-04-28 21:21:54,013 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2025-04-28 21:21:54,013 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:54,017 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:54,018 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:54,023 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:54,023 INFO  L85        PathProgramCache]: Analyzing trace with hash -567935244, now seen corresponding path program 1 times
[2025-04-28 21:21:54,030 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:54,030 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537672076]
[2025-04-28 21:21:54,030 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:54,031 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:54,082 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes.
[2025-04-28 21:21:54,204 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements.
[2025-04-28 21:21:54,204 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:54,205 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:54,803 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 21:21:54,803 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:54,803 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537672076]
[2025-04-28 21:21:54,804 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537672076] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:54,804 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:54,808 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:54,809 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495334426]
[2025-04-28 21:21:54,811 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:54,816 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:54,820 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:54,874 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:54,878 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:54,881 INFO  L87              Difference]: Start difference. First operand  has 142 states, 10 states have (on average 3.7) internal successors, (37), 36 states have internal predecessors, (37), 128 states have call successors, (130), 5 states have call predecessors, (130), 5 states have return successors, (130), 102 states have call predecessors, (130), 128 states have call successors, (130) Second operand  has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:56,680 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:56,681 INFO  L93              Difference]: Finished difference Result 187 states and 545 transitions.
[2025-04-28 21:21:56,682 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:56,684 INFO  L79                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 18
[2025-04-28 21:21:56,684 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:56,709 INFO  L225             Difference]: With dead ends: 187
[2025-04-28 21:21:56,709 INFO  L226             Difference]: Without dead ends: 187
[2025-04-28 21:21:56,711 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:56,717 INFO  L437           NwaCegarLoop]: 294 mSDtfsCounter, 9 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:56,718 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1284 Invalid, 939 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2025-04-28 21:21:56,734 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 187 states.
[2025-04-28 21:21:56,928 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185.
[2025-04-28 21:21:56,930 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 185 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 45 states have internal predecessors, (48), 167 states have call successors, (170), 7 states have call predecessors, (170), 8 states have return successors, (325), 134 states have call predecessors, (325), 167 states have call successors, (325)
[2025-04-28 21:21:56,939 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions.
[2025-04-28 21:21:56,941 INFO  L79                 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 18
[2025-04-28 21:21:56,943 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:56,943 INFO  L485      AbstractCegarLoop]: Abstraction has 185 states and 543 transitions.
[2025-04-28 21:21:56,943 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:56,943 INFO  L278                IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions.
[2025-04-28 21:21:56,952 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2025-04-28 21:21:56,953 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:56,953 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:56,954 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:56,954 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:56,956 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:56,956 INFO  L85        PathProgramCache]: Analyzing trace with hash 1561025045, now seen corresponding path program 1 times
[2025-04-28 21:21:56,956 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:56,956 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909508643]
[2025-04-28 21:21:56,956 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:56,956 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:56,972 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes.
[2025-04-28 21:21:56,996 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements.
[2025-04-28 21:21:56,996 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:56,996 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:57,383 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:57,383 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:57,383 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909508643]
[2025-04-28 21:21:57,385 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909508643] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:57,385 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:57,385 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2025-04-28 21:21:57,385 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261795919]
[2025-04-28 21:21:57,385 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:57,386 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2025-04-28 21:21:57,387 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:57,387 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2025-04-28 21:21:57,390 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2025-04-28 21:21:57,390 INFO  L87              Difference]: Start difference. First operand 185 states and 543 transitions. Second operand  has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:58,614 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:58,615 INFO  L93              Difference]: Finished difference Result 236 states and 917 transitions.
[2025-04-28 21:21:58,615 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2025-04-28 21:21:58,616 INFO  L79                 Accepts]: Start accepts. Automaton has  has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 18
[2025-04-28 21:21:58,616 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:58,627 INFO  L225             Difference]: With dead ends: 236
[2025-04-28 21:21:58,628 INFO  L226             Difference]: Without dead ends: 236
[2025-04-28 21:21:58,628 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2025-04-28 21:21:58,629 INFO  L437           NwaCegarLoop]: 273 mSDtfsCounter, 9 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:58,630 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 908 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2025-04-28 21:21:58,631 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 236 states.
[2025-04-28 21:21:58,791 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234.
[2025-04-28 21:21:58,792 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 234 states, 18 states have (on average 3.388888888888889) internal successors, (61), 57 states have internal predecessors, (61), 208 states have call successors, (212), 9 states have call predecessors, (212), 12 states have return successors, (642), 169 states have call predecessors, (642), 208 states have call successors, (642)
[2025-04-28 21:21:58,801 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 915 transitions.
[2025-04-28 21:21:58,802 INFO  L79                 Accepts]: Start accepts. Automaton has 234 states and 915 transitions. Word has length 18
[2025-04-28 21:21:58,802 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:58,802 INFO  L485      AbstractCegarLoop]: Abstraction has 234 states and 915 transitions.
[2025-04-28 21:21:58,802 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:58,802 INFO  L278                IsEmpty]: Start isEmpty. Operand 234 states and 915 transitions.
[2025-04-28 21:21:58,817 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:58,818 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:58,818 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:58,818 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2025-04-28 21:21:58,818 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:58,819 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:58,820 INFO  L85        PathProgramCache]: Analyzing trace with hash 33026183, now seen corresponding path program 1 times
[2025-04-28 21:21:58,820 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:58,820 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846088782]
[2025-04-28 21:21:58,820 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:58,820 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:58,837 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:58,858 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:58,858 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:58,859 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:59,077 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:59,077 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:59,078 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846088782]
[2025-04-28 21:21:59,078 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846088782] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:59,078 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942586061]
[2025-04-28 21:21:59,078 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:59,078 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:59,082 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:59,088 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 21:21:59,091 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:59,155 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:59,224 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:59,224 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:59,225 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:59,228 INFO  L256         TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:59,235 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:59,329 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:59,329 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:59,741 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:59,741 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942586061] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:59,742 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:59,742 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10
[2025-04-28 21:21:59,742 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81127940]
[2025-04-28 21:21:59,743 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:59,743 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2025-04-28 21:21:59,743 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:59,743 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2025-04-28 21:21:59,743 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90
[2025-04-28 21:21:59,744 INFO  L87              Difference]: Start difference. First operand 234 states and 915 transitions. Second operand  has 10 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10)
[2025-04-28 21:22:08,667 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:08,667 INFO  L93              Difference]: Finished difference Result 932 states and 7856 transitions.
[2025-04-28 21:22:08,668 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2025-04-28 21:22:08,668 INFO  L79                 Accepts]: Start accepts. Automaton has  has 10 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10) Word has length 21
[2025-04-28 21:22:08,669 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:08,828 INFO  L225             Difference]: With dead ends: 932
[2025-04-28 21:22:08,828 INFO  L226             Difference]: Without dead ends: 932
[2025-04-28 21:22:08,829 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:22:08,831 INFO  L437           NwaCegarLoop]: 576 mSDtfsCounter, 35 mSDsluCounter, 3274 mSDsCounter, 0 mSdLazyCounter, 8320 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 3850 SdHoareTripleChecker+Invalid, 8632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 8320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:08,831 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 3850 Invalid, 8632 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [312 Valid, 8320 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time]
[2025-04-28 21:22:08,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 932 states.
[2025-04-28 21:22:10,271 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 904.
[2025-04-28 21:22:10,280 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 904 states, 64 states have (on average 2.9375) internal successors, (188), 180 states have internal predecessors, (188), 808 states have call successors, (816), 24 states have call predecessors, (816), 47 states have return successors, (6657), 701 states have call predecessors, (6657), 808 states have call successors, (6657)
[2025-04-28 21:22:10,367 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 7661 transitions.
[2025-04-28 21:22:10,369 INFO  L79                 Accepts]: Start accepts. Automaton has 904 states and 7661 transitions. Word has length 21
[2025-04-28 21:22:10,369 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:10,370 INFO  L485      AbstractCegarLoop]: Abstraction has 904 states and 7661 transitions.
[2025-04-28 21:22:10,370 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10)
[2025-04-28 21:22:10,370 INFO  L278                IsEmpty]: Start isEmpty. Operand 904 states and 7661 transitions.
[2025-04-28 21:22:10,397 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:22:10,397 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:10,398 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:10,405 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:22:10,598 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:10,599 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:10,600 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:10,600 INFO  L85        PathProgramCache]: Analyzing trace with hash -1747204094, now seen corresponding path program 1 times
[2025-04-28 21:22:10,600 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:10,600 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795532707]
[2025-04-28 21:22:10,600 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:10,601 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:10,643 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:22:10,658 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:22:10,660 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:10,660 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:10,847 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:22:10,847 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:10,847 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795532707]
[2025-04-28 21:22:10,847 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795532707] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:10,847 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564663443]
[2025-04-28 21:22:10,847 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:10,847 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:10,850 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:10,852 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 21:22:10,855 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:22:10,906 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:22:10,966 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:22:10,966 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:10,966 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:10,968 INFO  L256         TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:10,970 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:11,002 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:22:11,005 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:11,375 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:22:11,376 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [564663443] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:11,377 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:11,377 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7
[2025-04-28 21:22:11,377 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899038339]
[2025-04-28 21:22:11,377 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:11,378 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:22:11,378 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:11,378 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:22:11,379 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:22:11,379 INFO  L87              Difference]: Start difference. First operand 904 states and 7661 transitions. Second operand  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:22:13,262 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:13,263 INFO  L93              Difference]: Finished difference Result 1418 states and 15369 transitions.
[2025-04-28 21:22:13,263 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:22:13,264 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 21
[2025-04-28 21:22:13,264 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:13,535 INFO  L225             Difference]: With dead ends: 1418
[2025-04-28 21:22:13,535 INFO  L226             Difference]: Without dead ends: 1418
[2025-04-28 21:22:13,536 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 5 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 21:22:13,539 INFO  L437           NwaCegarLoop]: 403 mSDtfsCounter, 17 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:13,540 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 2078 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2025-04-28 21:22:13,546 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1418 states.
[2025-04-28 21:22:15,996 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1352.
[2025-04-28 21:22:16,009 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1352 states, 108 states have (on average 2.5462962962962963) internal successors, (275), 266 states have internal predecessors, (275), 1180 states have call successors, (1190), 32 states have call predecessors, (1190), 85 states have return successors, (13142), 1054 states have call predecessors, (13142), 1180 states have call successors, (13142)
[2025-04-28 21:22:16,131 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 14607 transitions.
[2025-04-28 21:22:16,132 INFO  L79                 Accepts]: Start accepts. Automaton has 1352 states and 14607 transitions. Word has length 21
[2025-04-28 21:22:16,132 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:16,132 INFO  L485      AbstractCegarLoop]: Abstraction has 1352 states and 14607 transitions.
[2025-04-28 21:22:16,132 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:22:16,132 INFO  L278                IsEmpty]: Start isEmpty. Operand 1352 states and 14607 transitions.
[2025-04-28 21:22:16,168 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:22:16,169 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:16,169 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:16,174 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:22:16,369 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:16,369 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:16,370 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:16,370 INFO  L85        PathProgramCache]: Analyzing trace with hash 805133692, now seen corresponding path program 1 times
[2025-04-28 21:22:16,370 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:16,370 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248945605]
[2025-04-28 21:22:16,370 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:16,370 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:16,380 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:22:16,397 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:22:16,397 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:16,397 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:16,589 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:22:16,590 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:16,590 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248945605]
[2025-04-28 21:22:16,590 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248945605] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:16,590 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992579369]
[2025-04-28 21:22:16,590 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:16,590 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:16,593 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:16,595 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 21:22:16,598 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:22:16,651 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:22:16,718 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:22:16,718 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:16,718 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:16,721 INFO  L256         TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 7 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:16,722 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:16,755 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:22:16,755 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:17,234 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:22:17,234 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [992579369] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:17,235 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:17,235 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11
[2025-04-28 21:22:17,235 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904387598]
[2025-04-28 21:22:17,235 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:17,235 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2025-04-28 21:22:17,235 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:17,236 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2025-04-28 21:22:17,236 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:22:17,236 INFO  L87              Difference]: Start difference. First operand 1352 states and 14607 transitions. Second operand  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10)
[2025-04-28 21:22:19,941 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:19,941 INFO  L93              Difference]: Finished difference Result 2496 states and 41682 transitions.
[2025-04-28 21:22:19,942 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:22:19,942 INFO  L79                 Accepts]: Start accepts. Automaton has  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10) Word has length 24
[2025-04-28 21:22:19,943 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:20,475 INFO  L225             Difference]: With dead ends: 2496
[2025-04-28 21:22:20,475 INFO  L226             Difference]: Without dead ends: 2496
[2025-04-28 21:22:20,475 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:22:20,476 INFO  L437           NwaCegarLoop]: 357 mSDtfsCounter, 17 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:20,476 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 2772 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time]
[2025-04-28 21:22:20,479 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2496 states.
