./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-074.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:45,239 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:45,337 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb75f3fe-58f8-4c26-96ac-48fa377073db/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:45,342 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:45,342 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:45,375 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:45,376 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:45,376 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:45,376 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:45,376 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:45,376 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:45,377 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:45,377 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:45,377 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:45,378 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:45,379 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:45,379 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:45,379 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:45,379 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:45,379 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:45,379 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:45,380 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:45,380 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:45,380 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:45,380 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:45,381 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:45,381 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:45,739 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:45,751 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:45,754 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:45,756 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:45,756 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:45,758 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb75f3fe-58f8-4c26-96ac-48fa377073db/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-074.smt2
[2025-04-28 21:21:45,759 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:45,767 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:46,302 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb75f3fe-58f8-4c26-96ac-48fa377073db/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-074.smt2
[2025-04-28 21:21:46,306 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:46,307 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:46,308 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:46,308 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:46,309 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:46,312 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,395 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46 Unit
[2025-04-28 21:21:46,395 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:46,396 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:46,397 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:46,397 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:46,417 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,417 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,458 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,458 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,473 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,477 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,480 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,488 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,490 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,524 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:46,527 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:46,527 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:46,528 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:46,529 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,532 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:46,547 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:46,561 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 21:21:46,565 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 21:21:46,577 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:46,577 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:46,577 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:46,578 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure realizable given in one single declaration
[2025-04-28 21:21:46,578 INFO  L130     BoogieDeclarations]: Found specification of procedure realizable
[2025-04-28 21:21:46,578 INFO  L138     BoogieDeclarations]: Found implementation of procedure realizable
[2025-04-28 21:21:46,578 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcStart__syn given in one single declaration
[2025-04-28 21:21:46,578 INFO  L130     BoogieDeclarations]: Found specification of procedure funcStart__syn
[2025-04-28 21:21:46,578 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcStart__syn
[2025-04-28 21:21:46,578 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcStart__sem given in one single declaration
[2025-04-28 21:21:46,578 INFO  L130     BoogieDeclarations]: Found specification of procedure funcStart__sem
[2025-04-28 21:21:46,578 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcStart__sem
[2025-04-28 21:21:46,579 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcB__sem given in one single declaration
[2025-04-28 21:21:46,579 INFO  L130     BoogieDeclarations]: Found specification of procedure funcB__sem
[2025-04-28 21:21:46,579 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcB__sem
[2025-04-28 21:21:46,579 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcA__sem given in one single declaration
[2025-04-28 21:21:46,579 INFO  L130     BoogieDeclarations]: Found specification of procedure funcA__sem
[2025-04-28 21:21:46,579 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcA__sem
[2025-04-28 21:21:46,579 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS__sem given in one single declaration
[2025-04-28 21:21:46,579 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS__sem
[2025-04-28 21:21:46,579 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS__sem
[2025-04-28 21:21:46,580 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS1__sem given in one single declaration
[2025-04-28 21:21:46,580 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS1__sem
[2025-04-28 21:21:46,580 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS1__sem
[2025-04-28 21:21:46,580 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS__syn given in one single declaration
[2025-04-28 21:21:46,580 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS__syn
[2025-04-28 21:21:46,580 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS__syn
[2025-04-28 21:21:46,580 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS1__syn given in one single declaration
[2025-04-28 21:21:46,580 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS1__syn
[2025-04-28 21:21:46,580 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS1__syn
[2025-04-28 21:21:46,580 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcA__syn given in one single declaration
[2025-04-28 21:21:46,581 INFO  L130     BoogieDeclarations]: Found specification of procedure funcA__syn
[2025-04-28 21:21:46,581 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcA__syn
[2025-04-28 21:21:46,581 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcB__syn given in one single declaration
[2025-04-28 21:21:46,581 INFO  L130     BoogieDeclarations]: Found specification of procedure funcB__syn
[2025-04-28 21:21:46,581 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcB__syn
[2025-04-28 21:21:46,581 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:46,581 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:46,581 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:46,794 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:46,796 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:47,433 INFO  L?                        ?]: Removed 104 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:47,433 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:47,447 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:47,448 INFO  L312             CfgBuilder]: Removed 1 assume(true) statements.
[2025-04-28 21:21:47,451 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:47 BoogieIcfgContainer
[2025-04-28 21:21:47,451 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:47,456 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:47,456 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:47,462 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:47,462 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:46" (1/3) ...
[2025-04-28 21:21:47,463 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c55eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:47, skipping insertion in model container
[2025-04-28 21:21:47,463 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (2/3) ...
[2025-04-28 21:21:47,463 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c55eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:47, skipping insertion in model container
[2025-04-28 21:21:47,463 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:47" (3/3) ...
[2025-04-28 21:21:47,465 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:47,484 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:47,487 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 13 procedures, 66 locations, 122 edges, 13 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:47,555 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:47,573 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;@108da6f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:47,574 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:47,579 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 66 states, 25 states have (on average 1.64) internal successors, (41), 33 states have internal predecessors, (41), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (27), 21 states have call predecessors, (27), 27 states have call successors, (27)
[2025-04-28 21:21:47,595 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2025-04-28 21:21:47,596 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:47,597 INFO  L218           NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:47,598 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:47,605 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:47,606 INFO  L85        PathProgramCache]: Analyzing trace with hash 1280529590, now seen corresponding path program 1 times
[2025-04-28 21:21:47,615 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:47,616 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148525804]
[2025-04-28 21:21:47,616 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:47,617 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:47,717 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes.
[2025-04-28 21:21:47,909 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements.
[2025-04-28 21:21:47,910 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:47,910 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:50,503 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2025-04-28 21:21:50,504 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:50,504 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148525804]
[2025-04-28 21:21:50,505 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148525804] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:50,505 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:50,509 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12
[2025-04-28 21:21:50,510 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288232514]
[2025-04-28 21:21:50,511 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:50,522 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2025-04-28 21:21:50,522 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:50,572 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2025-04-28 21:21:50,573 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:50,576 INFO  L87              Difference]: Start difference. First operand  has 66 states, 25 states have (on average 1.64) internal successors, (41), 33 states have internal predecessors, (41), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (27), 21 states have call predecessors, (27), 27 states have call successors, (27) Second operand  has 12 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 8 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11)
[2025-04-28 21:21:51,050 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:51,051 INFO  L93              Difference]: Finished difference Result 78 states and 112 transitions.
[2025-04-28 21:21:51,055 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2025-04-28 21:21:51,056 INFO  L79                 Accepts]: Start accepts. Automaton has  has 12 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 8 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 48
[2025-04-28 21:21:51,057 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:51,071 INFO  L225             Difference]: With dead ends: 78
[2025-04-28 21:21:51,071 INFO  L226             Difference]: Without dead ends: 76
[2025-04-28 21:21:51,073 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182
[2025-04-28 21:21:51,080 INFO  L437           NwaCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:51,082 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 779 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2025-04-28 21:21:51,099 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 76 states.
[2025-04-28 21:21:51,143 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72.
[2025-04-28 21:21:51,145 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 34 states have internal predecessors, (42), 29 states have call successors, (29), 12 states have call predecessors, (29), 15 states have return successors, (35), 25 states have call predecessors, (35), 29 states have call successors, (35)
[2025-04-28 21:21:51,151 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 106 transitions.
[2025-04-28 21:21:51,152 INFO  L79                 Accepts]: Start accepts. Automaton has 72 states and 106 transitions. Word has length 48
[2025-04-28 21:21:51,153 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:51,153 INFO  L485      AbstractCegarLoop]: Abstraction has 72 states and 106 transitions.
[2025-04-28 21:21:51,154 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 8 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11)
[2025-04-28 21:21:51,154 INFO  L278                IsEmpty]: Start isEmpty. Operand 72 states and 106 transitions.
[2025-04-28 21:21:51,157 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2025-04-28 21:21:51,158 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:51,158 INFO  L218           NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:51,158 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:51,159 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:51,159 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:51,159 INFO  L85        PathProgramCache]: Analyzing trace with hash -997480567, now seen corresponding path program 1 times
[2025-04-28 21:21:51,160 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:51,160 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754087160]
[2025-04-28 21:21:51,160 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:51,160 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:51,223 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes.
[2025-04-28 21:21:51,250 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements.
[2025-04-28 21:21:51,250 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:51,250 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:53,494 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2025-04-28 21:21:53,495 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:53,495 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754087160]
[2025-04-28 21:21:53,495 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754087160] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:53,495 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446836074]
[2025-04-28 21:21:53,495 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:53,495 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:53,498 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:53,500 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 21:21:53,503 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:53,723 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes.
[2025-04-28 21:21:53,841 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements.
[2025-04-28 21:21:53,841 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:53,841 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:53,847 INFO  L256         TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 45 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:53,856 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:53,981 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2025-04-28 21:21:53,990 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 46
[2025-04-28 21:21:55,650 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2025-04-28 21:21:55,651 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:02,878 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:22:03,280 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:22:03,297 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:22:03,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2025-04-28 21:22:03,829 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446836074] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:03,829 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:03,829 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28
[2025-04-28 21:22:03,830 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793192106]
[2025-04-28 21:22:03,830 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:03,831 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2025-04-28 21:22:03,831 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:03,832 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2025-04-28 21:22:03,832 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756
[2025-04-28 21:22:03,833 INFO  L87              Difference]: Start difference. First operand 72 states and 106 transitions. Second operand  has 28 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 19 states have internal predecessors, (30), 21 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (28), 19 states have call predecessors, (28), 21 states have call successors, (28)
[2025-04-28 21:22:04,973 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:04,973 INFO  L93              Difference]: Finished difference Result 83 states and 118 transitions.
[2025-04-28 21:22:04,974 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2025-04-28 21:22:04,975 INFO  L79                 Accepts]: Start accepts. Automaton has  has 28 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 19 states have internal predecessors, (30), 21 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (28), 19 states have call predecessors, (28), 21 states have call successors, (28) Word has length 52
[2025-04-28 21:22:04,975 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:04,976 INFO  L225             Difference]: With dead ends: 83
[2025-04-28 21:22:04,977 INFO  L226             Difference]: Without dead ends: 81
[2025-04-28 21:22:04,977 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122
[2025-04-28 21:22:04,978 INFO  L437           NwaCegarLoop]: 87 mSDtfsCounter, 21 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:04,978 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1592 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2025-04-28 21:22:04,979 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81 states.
[2025-04-28 21:22:04,989 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72.
[2025-04-28 21:22:04,989 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 34 states have internal predecessors, (42), 29 states have call successors, (29), 12 states have call predecessors, (29), 15 states have return successors, (35), 25 states have call predecessors, (35), 29 states have call successors, (35)
[2025-04-28 21:22:04,991 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 106 transitions.
[2025-04-28 21:22:04,991 INFO  L79                 Accepts]: Start accepts. Automaton has 72 states and 106 transitions. Word has length 52
[2025-04-28 21:22:04,992 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:04,992 INFO  L485      AbstractCegarLoop]: Abstraction has 72 states and 106 transitions.
[2025-04-28 21:22:04,992 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 28 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 19 states have internal predecessors, (30), 21 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (28), 19 states have call predecessors, (28), 21 states have call successors, (28)
[2025-04-28 21:22:04,992 INFO  L278                IsEmpty]: Start isEmpty. Operand 72 states and 106 transitions.
[2025-04-28 21:22:04,994 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2025-04-28 21:22:04,994 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:04,994 INFO  L218           NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:05,000 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2025-04-28 21:22:05,198 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:05,198 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:05,199 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:05,199 INFO  L85        PathProgramCache]: Analyzing trace with hash 613037577, now seen corresponding path program 2 times
[2025-04-28 21:22:05,199 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:05,199 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866631544]
[2025-04-28 21:22:05,199 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:22:05,199 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:05,238 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes.
[2025-04-28 21:22:05,275 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements.
[2025-04-28 21:22:05,277 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:22:05,278 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:07,077 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2025-04-28 21:22:07,077 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:07,077 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866631544]
[2025-04-28 21:22:07,077 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866631544] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:22:07,077 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:22:07,077 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2025-04-28 21:22:07,077 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318904106]
[2025-04-28 21:22:07,077 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:22:07,078 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2025-04-28 21:22:07,078 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:07,078 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2025-04-28 21:22:07,078 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156
[2025-04-28 21:22:07,079 INFO  L87              Difference]: Start difference. First operand 72 states and 106 transitions. Second operand  has 13 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 9 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13)
[2025-04-28 21:22:07,394 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:07,394 INFO  L93              Difference]: Finished difference Result 74 states and 107 transitions.
[2025-04-28 21:22:07,394 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2025-04-28 21:22:07,394 INFO  L79                 Accepts]: Start accepts. Automaton has  has 13 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 9 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 52
[2025-04-28 21:22:07,395 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:07,396 INFO  L225             Difference]: With dead ends: 74
[2025-04-28 21:22:07,396 INFO  L226             Difference]: Without dead ends: 72
[2025-04-28 21:22:07,397 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240
[2025-04-28 21:22:07,397 INFO  L437           NwaCegarLoop]: 86 mSDtfsCounter, 6 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:07,398 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 983 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:22:07,398 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2025-04-28 21:22:07,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66.
[2025-04-28 21:22:07,405 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 66 states, 25 states have (on average 1.6) internal successors, (40), 32 states have internal predecessors, (40), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (28), 21 states have call predecessors, (28), 27 states have call successors, (28)
[2025-04-28 21:22:07,407 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions.
[2025-04-28 21:22:07,407 INFO  L79                 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 52
[2025-04-28 21:22:07,407 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:07,407 INFO  L485      AbstractCegarLoop]: Abstraction has 66 states and 95 transitions.
[2025-04-28 21:22:07,408 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 9 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13)
[2025-04-28 21:22:07,408 INFO  L278                IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions.
[2025-04-28 21:22:07,410 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 85
[2025-04-28 21:22:07,410 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:07,410 INFO  L218           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:07,411 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2025-04-28 21:22:07,411 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:07,411 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:07,411 INFO  L85        PathProgramCache]: Analyzing trace with hash -857507712, now seen corresponding path program 1 times
[2025-04-28 21:22:07,411 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:07,412 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815772545]
[2025-04-28 21:22:07,412 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:07,412 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:07,475 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes.
[2025-04-28 21:22:07,516 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements.
[2025-04-28 21:22:07,516 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:07,516 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:10,631 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked.
[2025-04-28 21:22:10,631 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:10,631 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815772545]
[2025-04-28 21:22:10,631 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815772545] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:10,632 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861130701]
[2025-04-28 21:22:10,632 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:10,632 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:10,635 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:10,636 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 21:22:10,638 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:22:10,885 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes.
[2025-04-28 21:22:11,054 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements.
[2025-04-28 21:22:11,054 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:11,054 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:11,060 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 59 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:11,068 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:11,106 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2025-04-28 21:22:11,110 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 46
[2025-04-28 21:22:11,144 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 3
[2025-04-28 21:22:12,486 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked.
[2025-04-28 21:22:12,486 INFO  L308         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2025-04-28 21:22:12,486 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [861130701] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:22:12,486 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2025-04-28 21:22:12,486 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [20] total 35
[2025-04-28 21:22:12,487 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163054482]
[2025-04-28 21:22:12,487 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:22:12,487 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2025-04-28 21:22:12,487 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:12,488 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2025-04-28 21:22:12,488 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190
[2025-04-28 21:22:12,489 INFO  L87              Difference]: Start difference. First operand 66 states and 95 transitions. Second operand  has 17 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 12 states have internal predecessors, (25), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (19), 14 states have call predecessors, (19), 12 states have call successors, (19)
[2025-04-28 21:22:13,178 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:13,178 INFO  L93              Difference]: Finished difference Result 91 states and 135 transitions.
[2025-04-28 21:22:13,178 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2025-04-28 21:22:13,179 INFO  L79                 Accepts]: Start accepts. Automaton has  has 17 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 12 states have internal predecessors, (25), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (19), 14 states have call predecessors, (19), 12 states have call successors, (19) Word has length 84
[2025-04-28 21:22:13,179 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:13,181 INFO  L225             Difference]: With dead ends: 91
[2025-04-28 21:22:13,181 INFO  L226             Difference]: Without dead ends: 89
[2025-04-28 21:22:13,182 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482
[2025-04-28 21:22:13,183 INFO  L437           NwaCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:13,183 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1279 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2025-04-28 21:22:13,184 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 89 states.
[2025-04-28 21:22:13,196 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81.
[2025-04-28 21:22:13,197 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81 states, 30 states have (on average 1.5) internal successors, (45), 37 states have internal predecessors, (45), 32 states have call successors, (32), 12 states have call predecessors, (32), 18 states have return successors, (45), 31 states have call predecessors, (45), 32 states have call successors, (45)
[2025-04-28 21:22:13,199 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 122 transitions.
[2025-04-28 21:22:13,199 INFO  L79                 Accepts]: Start accepts. Automaton has 81 states and 122 transitions. Word has length 84
[2025-04-28 21:22:13,199 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:13,199 INFO  L485      AbstractCegarLoop]: Abstraction has 81 states and 122 transitions.
[2025-04-28 21:22:13,200 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 12 states have internal predecessors, (25), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (19), 14 states have call predecessors, (19), 12 states have call successors, (19)
[2025-04-28 21:22:13,200 INFO  L278                IsEmpty]: Start isEmpty. Operand 81 states and 122 transitions.
[2025-04-28 21:22:13,203 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 93
[2025-04-28 21:22:13,203 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:13,203 INFO  L218           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:13,212 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:22:13,403 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:13,404 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:13,404 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:13,404 INFO  L85        PathProgramCache]: Analyzing trace with hash -456275930, now seen corresponding path program 1 times
[2025-04-28 21:22:13,404 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:13,404 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710214398]
[2025-04-28 21:22:13,404 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:13,404 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:13,453 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes.
[2025-04-28 21:22:13,516 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements.
[2025-04-28 21:22:13,516 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:13,516 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
