./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de62.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 22:12:43,338 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:12:43,410 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:12:43,416 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:12:43,418 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:12:43,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:12:43,451 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:12:43,451 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:12:43,452 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:12:43,453 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:12:43,454 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:12:43,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:12:43,455 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:12:43,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:12:43,457 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:12:43,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:12:43,458 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:12:43,458 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:12:43,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:12:43,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:12:43,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:12:43,462 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:12:43,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:12:43,462 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:12:43,462 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:12:43,463 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:12:43,463 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:12:43,463 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:12:43,463 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:12:43,464 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:12:43,464 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:12:43,465 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:12:43,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:12:43,465 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:12:43,466 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:12:43,466 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:12:43,467 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:12:43,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:12:43,467 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:12:43,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:12:43,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:12:43,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:12:43,468 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:12:43,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:12:43,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:12:43,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:12:43,748 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:12:43,748 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:12:43,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-09-12 22:12:45,171 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:12:45,348 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:12:45,349 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-09-12 22:12:45,355 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/95a2602a9/87c3c50305864bec979f576fef6b3609/FLAG9b133bc94 [2024-09-12 22:12:45,755 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/95a2602a9/87c3c50305864bec979f576fef6b3609 [2024-09-12 22:12:45,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:12:45,759 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:12:45,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:12:45,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:12:45,768 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:12:45,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:12:45" (1/1) ... [2024-09-12 22:12:45,769 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6759c43d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:45, skipping insertion in model container [2024-09-12 22:12:45,770 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:12:45" (1/1) ... [2024-09-12 22:12:45,790 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:12:45,956 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2024-09-12 22:12:45,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:12:45,979 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:12:45,992 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2024-09-12 22:12:45,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:12:46,018 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:12:46,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46 WrapperNode [2024-09-12 22:12:46,022 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:12:46,023 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:12:46,023 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:12:46,023 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:12:46,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,047 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:12:46,048 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:12:46,048 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:12:46,049 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:12:46,049 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:12:46,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,064 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,085 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 22:12:46,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,088 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,098 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,100 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,105 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:12:46,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:12:46,106 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:12:46,106 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:12:46,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (1/1) ... [2024-09-12 22:12:46,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:12:46,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:46,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 22:12:46,157 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 22:12:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:12:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:12:46,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:12:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:12:46,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:12:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:12:46,202 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:12:46,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:12:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 22:12:46,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 22:12:46,259 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:12:46,261 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:12:46,400 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-12 22:12:46,401 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:12:46,430 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:12:46,430 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-12 22:12:46,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:12:46 BoogieIcfgContainer [2024-09-12 22:12:46,431 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:12:46,434 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:12:46,434 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:12:46,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:12:46,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:12:45" (1/3) ... [2024-09-12 22:12:46,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6e987e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:12:46, skipping insertion in model container [2024-09-12 22:12:46,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:46" (2/3) ... [2024-09-12 22:12:46,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6e987e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:12:46, skipping insertion in model container [2024-09-12 22:12:46,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:12:46" (3/3) ... [2024-09-12 22:12:46,441 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2024-09-12 22:12:46,457 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:12:46,457 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 22:12:46,505 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:12:46,512 INFO L336 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=All, 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;@538f54e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:12:46,512 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 22:12:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:12:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:12:46,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:46,524 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:46,524 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:46,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:46,530 INFO L85 PathProgramCache]: Analyzing trace with hash -294793433, now seen corresponding path program 1 times [2024-09-12 22:12:46,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:46,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395075661] [2024-09-12 22:12:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:46,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:46,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:46,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395075661] [2024-09-12 22:12:46,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395075661] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:12:46,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:12:46,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 22:12:46,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039427772] [2024-09-12 22:12:46,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:12:46,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 22:12:46,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 22:12:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:12:46,769 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:46,800 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2024-09-12 22:12:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 22:12:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-12 22:12:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:46,808 INFO L225 Difference]: With dead ends: 40 [2024-09-12 22:12:46,809 INFO L226 Difference]: Without dead ends: 17 [2024-09-12 22:12:46,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:12:46,816 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:46,819 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:12:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-12 22:12:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-12 22:12:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2024-09-12 22:12:46,852 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 16 [2024-09-12 22:12:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:46,854 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2024-09-12 22:12:46,854 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:46,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2024-09-12 22:12:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:12:46,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:46,857 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:46,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:12:46,857 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:46,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:46,859 INFO L85 PathProgramCache]: Analyzing trace with hash -951970017, now seen corresponding path program 1 times [2024-09-12 22:12:46,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:46,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297574951] [2024-09-12 22:12:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:46,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:47,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:47,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297574951] [2024-09-12 22:12:47,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297574951] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:12:47,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:12:47,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 22:12:47,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638638484] [2024-09-12 22:12:47,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:12:47,142 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 22:12:47,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 22:12:47,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:12:47,144 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:47,218 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2024-09-12 22:12:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 22:12:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-12 22:12:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:47,220 INFO L225 Difference]: With dead ends: 33 [2024-09-12 22:12:47,221 INFO L226 Difference]: Without dead ends: 22 [2024-09-12 22:12:47,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:12:47,223 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:47,225 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:12:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-12 22:12:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-12 22:12:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-09-12 22:12:47,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2024-09-12 22:12:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:47,238 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-09-12 22:12:47,238 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-09-12 22:12:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 22:12:47,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:47,239 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:47,240 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 22:12:47,240 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:47,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash 589238346, now seen corresponding path program 1 times [2024-09-12 22:12:47,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:47,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074923844] [2024-09-12 22:12:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:47,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:47,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:47,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074923844] [2024-09-12 22:12:47,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074923844] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:12:47,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:12:47,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:12:47,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187313546] [2024-09-12 22:12:47,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:12:47,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:12:47,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:47,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:12:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:12:47,320 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:47,365 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2024-09-12 22:12:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:12:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-12 22:12:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:47,368 INFO L225 Difference]: With dead ends: 46 [2024-09-12 22:12:47,368 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 22:12:47,368 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:12:47,371 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:47,372 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 29 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:12:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 22:12:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 22:12:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2024-09-12 22:12:47,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 17 [2024-09-12 22:12:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:47,389 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2024-09-12 22:12:47,389 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2024-09-12 22:12:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 22:12:47,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:47,391 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:47,391 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 22:12:47,391 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:47,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1992066745, now seen corresponding path program 1 times [2024-09-12 22:12:47,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:47,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645087221] [2024-09-12 22:12:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:47,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:47,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645087221] [2024-09-12 22:12:47,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645087221] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:12:47,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:12:47,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:12:47,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179238313] [2024-09-12 22:12:47,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:12:47,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:12:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:12:47,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:12:47,458 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:47,498 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2024-09-12 22:12:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:12:47,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-12 22:12:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:47,499 INFO L225 Difference]: With dead ends: 48 [2024-09-12 22:12:47,499 INFO L226 Difference]: Without dead ends: 36 [2024-09-12 22:12:47,500 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:12:47,501 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:47,501 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:12:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-12 22:12:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-12 22:12:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2024-09-12 22:12:47,518 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 17 [2024-09-12 22:12:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:47,518 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2024-09-12 22:12:47,518 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2024-09-12 22:12:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 22:12:47,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:47,520 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:47,520 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-12 22:12:47,520 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:47,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1567147830, now seen corresponding path program 1 times [2024-09-12 22:12:47,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:47,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841249054] [2024-09-12 22:12:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:47,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:47,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841249054] [2024-09-12 22:12:47,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841249054] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:12:47,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:12:47,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 22:12:47,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775519702] [2024-09-12 22:12:47,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:12:47,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:12:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:12:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:12:47,644 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:47,697 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2024-09-12 22:12:47,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:12:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-12 22:12:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:47,699 INFO L225 Difference]: With dead ends: 46 [2024-09-12 22:12:47,699 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 22:12:47,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:12:47,702 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:47,706 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:12:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 22:12:47,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 22:12:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2024-09-12 22:12:47,714 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 19 [2024-09-12 22:12:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:47,714 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2024-09-12 22:12:47,714 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:47,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2024-09-12 22:12:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 22:12:47,716 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:47,716 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:47,716 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-12 22:12:47,716 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:47,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1052281419, now seen corresponding path program 1 times [2024-09-12 22:12:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851087535] [2024-09-12 22:12:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:47,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:47,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:47,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851087535] [2024-09-12 22:12:47,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851087535] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:47,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745177832] [2024-09-12 22:12:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:47,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:47,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:47,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:12:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:47,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:12:47,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:47,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:47,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745177832] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:47,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-12 22:12:47,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-12 22:12:47,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635543167] [2024-09-12 22:12:47,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:12:47,996 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:12:47,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:12:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:12:47,998 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:48,038 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-09-12 22:12:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:12:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-12 22:12:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:48,039 INFO L225 Difference]: With dead ends: 40 [2024-09-12 22:12:48,039 INFO L226 Difference]: Without dead ends: 29 [2024-09-12 22:12:48,040 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:12:48,040 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:48,041 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:12:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-12 22:12:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-12 22:12:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2024-09-12 22:12:48,051 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 19 [2024-09-12 22:12:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:48,051 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2024-09-12 22:12:48,052 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:48,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2024-09-12 22:12:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:12:48,053 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:48,053 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:48,069 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 22:12:48,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 22:12:48,258 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:48,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:48,258 INFO L85 PathProgramCache]: Analyzing trace with hash -61419458, now seen corresponding path program 1 times [2024-09-12 22:12:48,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:48,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534481622] [2024-09-12 22:12:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:48,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:48,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:12:48,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:48,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534481622] [2024-09-12 22:12:48,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534481622] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:48,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371384439] [2024-09-12 22:12:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:48,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:48,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:48,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:48,358 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:12:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:48,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 22:12:48,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:48,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:12:48,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371384439] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:48,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:48,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2024-09-12 22:12:48,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215827077] [2024-09-12 22:12:48,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:48,543 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 22:12:48,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:48,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 22:12:48,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:12:48,544 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:48,712 INFO L93 Difference]: Finished difference Result 95 states and 148 transitions. [2024-09-12 22:12:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 22:12:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-12 22:12:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:48,715 INFO L225 Difference]: With dead ends: 95 [2024-09-12 22:12:48,715 INFO L226 Difference]: Without dead ends: 77 [2024-09-12 22:12:48,715 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:12:48,716 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:48,717 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 76 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:12:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-12 22:12:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2024-09-12 22:12:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2024-09-12 22:12:48,732 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 20 [2024-09-12 22:12:48,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:48,732 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2024-09-12 22:12:48,732 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:48,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:48,733 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2024-09-12 22:12:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:12:48,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:48,734 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:48,750 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 22:12:48,937 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 22:12:48,938 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:48,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:48,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1324513826, now seen corresponding path program 1 times [2024-09-12 22:12:48,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:48,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211548995] [2024-09-12 22:12:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:48,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:49,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:49,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:49,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211548995] [2024-09-12 22:12:49,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211548995] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:49,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638539789] [2024-09-12 22:12:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:49,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:49,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:49,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:49,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:12:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:49,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:12:49,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:12:49,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:12:49,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638539789] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:49,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:49,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-12 22:12:49,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167771588] [2024-09-12 22:12:49,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:49,153 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:12:49,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:49,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:12:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:12:49,153 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:49,281 INFO L93 Difference]: Finished difference Result 174 states and 264 transitions. [2024-09-12 22:12:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 22:12:49,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-12 22:12:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:49,284 INFO L225 Difference]: With dead ends: 174 [2024-09-12 22:12:49,286 INFO L226 Difference]: Without dead ends: 150 [2024-09-12 22:12:49,287 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:12:49,287 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:49,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 83 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:12:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-12 22:12:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 87. [2024-09-12 22:12:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.5) internal successors, (123), 82 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2024-09-12 22:12:49,320 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 20 [2024-09-12 22:12:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:49,320 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2024-09-12 22:12:49,320 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:49,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2024-09-12 22:12:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 22:12:49,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:49,321 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:49,342 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 22:12:49,528 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-12 22:12:49,529 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:49,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1423642650, now seen corresponding path program 1 times [2024-09-12 22:12:49,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:49,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752363026] [2024-09-12 22:12:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:49,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:49,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:49,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752363026] [2024-09-12 22:12:49,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752363026] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:49,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934306546] [2024-09-12 22:12:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:49,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:49,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:49,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:49,658 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:12:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:49,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 22:12:49,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:49,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:49,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934306546] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:49,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:49,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-12 22:12:49,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982647252] [2024-09-12 22:12:49,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:49,819 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 22:12:49,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:49,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 22:12:49,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:12:49,820 INFO L87 Difference]: Start difference. First operand 87 states and 127 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:50,130 INFO L93 Difference]: Finished difference Result 162 states and 239 transitions. [2024-09-12 22:12:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 22:12:50,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-12 22:12:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:50,132 INFO L225 Difference]: With dead ends: 162 [2024-09-12 22:12:50,132 INFO L226 Difference]: Without dead ends: 127 [2024-09-12 22:12:50,132 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:12:50,133 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:50,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 77 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:12:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-12 22:12:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2024-09-12 22:12:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 101 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 150 transitions. [2024-09-12 22:12:50,180 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 150 transitions. Word has length 21 [2024-09-12 22:12:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:50,181 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 150 transitions. [2024-09-12 22:12:50,181 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:50,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:50,181 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 150 transitions. [2024-09-12 22:12:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 22:12:50,182 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:50,182 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:50,197 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:50,382 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:50,383 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:50,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1756794400, now seen corresponding path program 1 times [2024-09-12 22:12:50,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:50,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213217022] [2024-09-12 22:12:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:50,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:50,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:50,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:50,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213217022] [2024-09-12 22:12:50,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213217022] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:50,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480146856] [2024-09-12 22:12:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:50,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:50,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:50,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:50,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:12:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:50,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:12:50,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:12:50,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:12:50,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480146856] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:50,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:50,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-12 22:12:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847992121] [2024-09-12 22:12:50,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:50,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 22:12:50,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 22:12:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:12:50,696 INFO L87 Difference]: Start difference. First operand 106 states and 150 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:50,819 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2024-09-12 22:12:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:12:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-12 22:12:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:50,821 INFO L225 Difference]: With dead ends: 136 [2024-09-12 22:12:50,821 INFO L226 Difference]: Without dead ends: 120 [2024-09-12 22:12:50,821 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:12:50,822 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:50,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 94 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:12:50,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-12 22:12:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2024-09-12 22:12:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.4948453608247423) internal successors, (145), 97 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 149 transitions. [2024-09-12 22:12:50,865 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 149 transitions. Word has length 22 [2024-09-12 22:12:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:50,865 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 149 transitions. [2024-09-12 22:12:50,866 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:50,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 149 transitions. [2024-09-12 22:12:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 22:12:50,867 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:50,867 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:50,884 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:51,067 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 22:12:51,068 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:51,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:51,068 INFO L85 PathProgramCache]: Analyzing trace with hash 731418570, now seen corresponding path program 2 times [2024-09-12 22:12:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:51,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099401234] [2024-09-12 22:12:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:51,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:51,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 22:12:51,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099401234] [2024-09-12 22:12:51,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099401234] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463526368] [2024-09-12 22:12:51,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:12:51,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:51,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:51,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:51,160 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:12:51,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:12:51,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:51,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:12:51,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 22:12:51,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 22:12:51,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463526368] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:51,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:51,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-12 22:12:51,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285157274] [2024-09-12 22:12:51,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:51,311 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 22:12:51,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 22:12:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:12:51,315 INFO L87 Difference]: Start difference. First operand 102 states and 149 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:51,485 INFO L93 Difference]: Finished difference Result 143 states and 210 transitions. [2024-09-12 22:12:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 22:12:51,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-12 22:12:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:51,486 INFO L225 Difference]: With dead ends: 143 [2024-09-12 22:12:51,486 INFO L226 Difference]: Without dead ends: 97 [2024-09-12 22:12:51,487 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:12:51,487 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:51,487 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 111 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:12:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-12 22:12:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2024-09-12 22:12:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4761904761904763) internal successors, (124), 84 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 128 transitions. [2024-09-12 22:12:51,525 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 128 transitions. Word has length 23 [2024-09-12 22:12:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:51,526 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 128 transitions. [2024-09-12 22:12:51,526 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:51,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 128 transitions. [2024-09-12 22:12:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 22:12:51,527 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:51,527 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:51,544 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:51,731 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 22:12:51,731 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:51,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1260027713, now seen corresponding path program 3 times [2024-09-12 22:12:51,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:51,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53910655] [2024-09-12 22:12:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:51,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:51,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:51,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:51,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53910655] [2024-09-12 22:12:51,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53910655] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:51,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537132244] [2024-09-12 22:12:51,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:12:51,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:51,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:51,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:51,864 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:12:51,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 22:12:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:51,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 22:12:51,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:12:52,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:12:52,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537132244] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:52,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:52,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-12 22:12:52,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384655006] [2024-09-12 22:12:52,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:52,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 22:12:52,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 22:12:52,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:12:52,144 INFO L87 Difference]: Start difference. First operand 89 states and 128 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:52,499 INFO L93 Difference]: Finished difference Result 146 states and 212 transitions. [2024-09-12 22:12:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 22:12:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-12 22:12:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:52,501 INFO L225 Difference]: With dead ends: 146 [2024-09-12 22:12:52,501 INFO L226 Difference]: Without dead ends: 89 [2024-09-12 22:12:52,501 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-09-12 22:12:52,502 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:52,502 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 192 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:12:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-12 22:12:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2024-09-12 22:12:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 73 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2024-09-12 22:12:52,526 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 24 [2024-09-12 22:12:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:52,527 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2024-09-12 22:12:52,527 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:52,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2024-09-12 22:12:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 22:12:52,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:52,528 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:52,545 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:52,729 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:52,729 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:52,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:52,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2144926014, now seen corresponding path program 4 times [2024-09-12 22:12:52,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:52,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516440723] [2024-09-12 22:12:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:52,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:52,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 22:12:52,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516440723] [2024-09-12 22:12:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516440723] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:52,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632668699] [2024-09-12 22:12:52,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:12:52,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:52,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:52,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:52,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 22:12:52,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:12:52,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:52,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:12:52,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:12:52,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:12:52,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632668699] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:52,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:52,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 5] total 13 [2024-09-12 22:12:52,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354381223] [2024-09-12 22:12:52,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:52,995 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 22:12:52,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:52,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 22:12:52,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:12:52,996 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:53,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:53,483 INFO L93 Difference]: Finished difference Result 175 states and 263 transitions. [2024-09-12 22:12:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 22:12:53,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-12 22:12:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:53,485 INFO L225 Difference]: With dead ends: 175 [2024-09-12 22:12:53,485 INFO L226 Difference]: Without dead ends: 140 [2024-09-12 22:12:53,485 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2024-09-12 22:12:53,486 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:53,486 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 180 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:12:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-12 22:12:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2024-09-12 22:12:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 102 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2024-09-12 22:12:53,518 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 26 [2024-09-12 22:12:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:53,518 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2024-09-12 22:12:53,518 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:53,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2024-09-12 22:12:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 22:12:53,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:53,520 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:53,536 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:53,723 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:53,723 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:53,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash -52963974, now seen corresponding path program 5 times [2024-09-12 22:12:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:53,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657825543] [2024-09-12 22:12:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:53,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:53,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:53,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:53,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657825543] [2024-09-12 22:12:53,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657825543] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:53,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691411703] [2024-09-12 22:12:53,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:12:53,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:53,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:53,891 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:53,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 22:12:53,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 22:12:53,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:53,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 22:12:53,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:54,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 22:12:54,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691411703] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:54,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:54,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 22 [2024-09-12 22:12:54,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042153025] [2024-09-12 22:12:54,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:54,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 22:12:54,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 22:12:54,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:12:54,220 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:54,944 INFO L93 Difference]: Finished difference Result 183 states and 271 transitions. [2024-09-12 22:12:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 22:12:54,945 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-12 22:12:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:54,946 INFO L225 Difference]: With dead ends: 183 [2024-09-12 22:12:54,946 INFO L226 Difference]: Without dead ends: 146 [2024-09-12 22:12:54,947 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=420, Invalid=1140, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 22:12:54,947 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:54,948 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 199 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:12:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-12 22:12:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 116. [2024-09-12 22:12:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.3783783783783783) internal successors, (153), 111 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2024-09-12 22:12:54,983 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 27 [2024-09-12 22:12:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:54,984 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2024-09-12 22:12:54,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:54,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2024-09-12 22:12:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 22:12:54,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:54,985 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:55,003 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:55,185 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 22:12:55,186 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:55,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:55,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1202238023, now seen corresponding path program 1 times [2024-09-12 22:12:55,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:55,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460436705] [2024-09-12 22:12:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:55,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:55,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 22:12:55,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:55,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460436705] [2024-09-12 22:12:55,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460436705] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:55,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448390648] [2024-09-12 22:12:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:55,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:55,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:55,303 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:55,305 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 22:12:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:55,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 22:12:55,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:12:55,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 22:12:55,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448390648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:55,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:55,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 8] total 20 [2024-09-12 22:12:55,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537796884] [2024-09-12 22:12:55,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:55,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 22:12:55,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:55,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 22:12:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-09-12 22:12:55,575 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:56,354 INFO L93 Difference]: Finished difference Result 223 states and 327 transitions. [2024-09-12 22:12:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 22:12:56,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-12 22:12:56,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:56,356 INFO L225 Difference]: With dead ends: 223 [2024-09-12 22:12:56,356 INFO L226 Difference]: Without dead ends: 173 [2024-09-12 22:12:56,357 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 22:12:56,357 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:56,358 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 214 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:12:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-12 22:12:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 142. [2024-09-12 22:12:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.3941605839416058) internal successors, (191), 137 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2024-09-12 22:12:56,398 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 27 [2024-09-12 22:12:56,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:56,398 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2024-09-12 22:12:56,398 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:56,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2024-09-12 22:12:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 22:12:56,399 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:56,399 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:56,415 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:56,599 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 22:12:56,600 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:56,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1489538522, now seen corresponding path program 2 times [2024-09-12 22:12:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:56,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257270339] [2024-09-12 22:12:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:56,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:56,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:12:56,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:56,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257270339] [2024-09-12 22:12:56,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257270339] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:56,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336220759] [2024-09-12 22:12:56,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:12:56,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:56,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:56,734 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:56,737 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 22:12:56,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:12:56,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:56,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 22:12:56,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:56,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:12:56,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336220759] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:56,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:56,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 18 [2024-09-12 22:12:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42492245] [2024-09-12 22:12:56,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:56,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 22:12:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 22:12:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:12:56,964 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:57,309 INFO L93 Difference]: Finished difference Result 333 states and 496 transitions. [2024-09-12 22:12:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 22:12:57,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-12 22:12:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:57,311 INFO L225 Difference]: With dead ends: 333 [2024-09-12 22:12:57,311 INFO L226 Difference]: Without dead ends: 265 [2024-09-12 22:12:57,312 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:12:57,312 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:57,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 230 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:12:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-12 22:12:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 193. [2024-09-12 22:12:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.372340425531915) internal successors, (258), 188 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 262 transitions. [2024-09-12 22:12:57,367 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 262 transitions. Word has length 27 [2024-09-12 22:12:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:57,367 INFO L474 AbstractCegarLoop]: Abstraction has 193 states and 262 transitions. [2024-09-12 22:12:57,367 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:57,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 262 transitions. [2024-09-12 22:12:57,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 22:12:57,368 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:57,368 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:57,384 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:57,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 22:12:57,569 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:57,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:57,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2067363207, now seen corresponding path program 2 times [2024-09-12 22:12:57,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:57,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289556294] [2024-09-12 22:12:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:57,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:57,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:57,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289556294] [2024-09-12 22:12:57,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289556294] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:57,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338657877] [2024-09-12 22:12:57,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:12:57,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:57,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:57,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:57,745 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 22:12:57,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:12:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:57,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 22:12:57,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 22:12:57,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 22:12:57,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338657877] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:57,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:57,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2024-09-12 22:12:57,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209154026] [2024-09-12 22:12:57,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:57,983 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 22:12:57,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:57,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 22:12:57,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-09-12 22:12:57,984 INFO L87 Difference]: Start difference. First operand 193 states and 262 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:58,913 INFO L93 Difference]: Finished difference Result 431 states and 663 transitions. [2024-09-12 22:12:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-12 22:12:58,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-12 22:12:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:58,915 INFO L225 Difference]: With dead ends: 431 [2024-09-12 22:12:58,915 INFO L226 Difference]: Without dead ends: 374 [2024-09-12 22:12:58,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=655, Invalid=2537, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 22:12:58,917 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:58,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 271 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:12:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-09-12 22:12:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 266. [2024-09-12 22:12:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.3754789272030652) internal successors, (359), 261 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 363 transitions. [2024-09-12 22:12:59,008 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 363 transitions. Word has length 29 [2024-09-12 22:12:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:59,009 INFO L474 AbstractCegarLoop]: Abstraction has 266 states and 363 transitions. [2024-09-12 22:12:59,009 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:59,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 363 transitions. [2024-09-12 22:12:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 22:12:59,011 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:59,011 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:59,023 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:59,211 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 22:12:59,212 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:59,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:59,212 INFO L85 PathProgramCache]: Analyzing trace with hash 997958656, now seen corresponding path program 3 times [2024-09-12 22:12:59,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:59,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004048433] [2024-09-12 22:12:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:59,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:59,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 22:12:59,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:59,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004048433] [2024-09-12 22:12:59,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004048433] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:59,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826167125] [2024-09-12 22:12:59,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:12:59,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:59,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:59,397 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:59,398 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 22:12:59,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:12:59,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:59,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 22:12:59,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 22:12:59,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 22:12:59,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826167125] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:59,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:59,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 16 [2024-09-12 22:12:59,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635224174] [2024-09-12 22:12:59,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:59,598 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 22:12:59,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:59,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 22:12:59,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2024-09-12 22:12:59,599 INFO L87 Difference]: Start difference. First operand 266 states and 363 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:07,662 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:13:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:16,221 INFO L93 Difference]: Finished difference Result 792 states and 1162 transitions. [2024-09-12 22:13:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 22:13:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-12 22:13:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:16,225 INFO L225 Difference]: With dead ends: 792 [2024-09-12 22:13:16,225 INFO L226 Difference]: Without dead ends: 689 [2024-09-12 22:13:16,226 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:13:16,226 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 94 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:16,226 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 205 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:13:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2024-09-12 22:13:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 333. [2024-09-12 22:13:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.375) internal successors, (451), 328 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 455 transitions. [2024-09-12 22:13:16,362 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 455 transitions. Word has length 30 [2024-09-12 22:13:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:16,362 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 455 transitions. [2024-09-12 22:13:16,363 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:16,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 455 transitions. [2024-09-12 22:13:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 22:13:16,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:16,364 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:16,381 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 22:13:16,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-12 22:13:16,569 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:16,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1400929057, now seen corresponding path program 2 times [2024-09-12 22:13:16,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:16,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720561765] [2024-09-12 22:13:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:16,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:16,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:13:16,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:16,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720561765] [2024-09-12 22:13:16,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720561765] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:16,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571626811] [2024-09-12 22:13:16,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:13:16,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:16,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:16,730 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:16,731 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 22:13:16,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:13:16,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:16,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 22:13:16,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:13:16,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-12 22:13:16,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571626811] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:16,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:16,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 5] total 15 [2024-09-12 22:13:16,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554919741] [2024-09-12 22:13:16,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:16,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 22:13:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 22:13:16,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:13:16,871 INFO L87 Difference]: Start difference. First operand 333 states and 455 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:17,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:17,390 INFO L93 Difference]: Finished difference Result 710 states and 1014 transitions. [2024-09-12 22:13:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 22:13:17,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-12 22:13:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:17,393 INFO L225 Difference]: With dead ends: 710 [2024-09-12 22:13:17,393 INFO L226 Difference]: Without dead ends: 571 [2024-09-12 22:13:17,394 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:13:17,394 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 101 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:17,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 299 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:13:17,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2024-09-12 22:13:17,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 427. [2024-09-12 22:13:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 422 states have (on average 1.3578199052132702) internal successors, (573), 422 states have internal predecessors, (573), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 577 transitions. [2024-09-12 22:13:17,546 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 577 transitions. Word has length 30 [2024-09-12 22:13:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:17,547 INFO L474 AbstractCegarLoop]: Abstraction has 427 states and 577 transitions. [2024-09-12 22:13:17,547 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:17,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 577 transitions. [2024-09-12 22:13:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 22:13:17,548 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:17,549 INFO L216 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:17,563 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 22:13:17,749 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:17,749 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:17,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash -184327170, now seen corresponding path program 4 times [2024-09-12 22:13:17,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:17,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140374226] [2024-09-12 22:13:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:17,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:17,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:13:17,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:17,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140374226] [2024-09-12 22:13:17,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140374226] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:17,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410674339] [2024-09-12 22:13:17,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:13:17,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:17,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:17,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:17,939 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 22:13:17,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:13:17,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:17,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 22:13:17,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:13:18,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 22:13:18,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410674339] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:18,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:18,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 5] total 16 [2024-09-12 22:13:18,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346756037] [2024-09-12 22:13:18,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:18,093 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 22:13:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 22:13:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-12 22:13:18,094 INFO L87 Difference]: Start difference. First operand 427 states and 577 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:18,838 INFO L93 Difference]: Finished difference Result 849 states and 1195 transitions. [2024-09-12 22:13:18,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 22:13:18,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-12 22:13:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:18,843 INFO L225 Difference]: With dead ends: 849 [2024-09-12 22:13:18,843 INFO L226 Difference]: Without dead ends: 667 [2024-09-12 22:13:18,844 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-09-12 22:13:18,844 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 131 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:18,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 389 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:13:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2024-09-12 22:13:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 425. [2024-09-12 22:13:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.3714285714285714) internal successors, (576), 420 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 580 transitions. [2024-09-12 22:13:19,034 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 580 transitions. Word has length 32 [2024-09-12 22:13:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:19,035 INFO L474 AbstractCegarLoop]: Abstraction has 425 states and 580 transitions. [2024-09-12 22:13:19,035 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:19,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 580 transitions. [2024-09-12 22:13:19,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 22:13:19,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:19,036 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:19,047 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:19,236 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:19,236 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:19,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash -906855808, now seen corresponding path program 5 times [2024-09-12 22:13:19,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:19,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492194689] [2024-09-12 22:13:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:19,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:13:19,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492194689] [2024-09-12 22:13:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492194689] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035015217] [2024-09-12 22:13:19,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:13:19,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:19,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:19,488 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:19,489 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 22:13:19,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 22:13:19,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:19,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:13:19,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 22:13:19,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 22:13:19,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035015217] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:19,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:19,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2024-09-12 22:13:19,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128385722] [2024-09-12 22:13:19,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:19,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 22:13:19,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:19,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 22:13:19,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:13:19,694 INFO L87 Difference]: Start difference. First operand 425 states and 580 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:20,118 INFO L93 Difference]: Finished difference Result 519 states and 698 transitions. [2024-09-12 22:13:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 22:13:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-12 22:13:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:20,121 INFO L225 Difference]: With dead ends: 519 [2024-09-12 22:13:20,121 INFO L226 Difference]: Without dead ends: 493 [2024-09-12 22:13:20,121 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 14 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:13:20,122 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:20,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:13:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2024-09-12 22:13:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 429. [2024-09-12 22:13:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 424 states have (on average 1.3797169811320755) internal successors, (585), 424 states have internal predecessors, (585), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 589 transitions. [2024-09-12 22:13:20,353 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 589 transitions. Word has length 34 [2024-09-12 22:13:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:20,353 INFO L474 AbstractCegarLoop]: Abstraction has 429 states and 589 transitions. [2024-09-12 22:13:20,353 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:20,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 589 transitions. [2024-09-12 22:13:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 22:13:20,355 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:20,355 INFO L216 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:20,372 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:20,555 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:20,555 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:20,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash 452281887, now seen corresponding path program 3 times [2024-09-12 22:13:20,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:20,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254686527] [2024-09-12 22:13:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:20,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:20,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:13:20,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254686527] [2024-09-12 22:13:20,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254686527] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146242409] [2024-09-12 22:13:20,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:13:20,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:20,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:20,782 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:20,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 22:13:20,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:13:20,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:20,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:13:20,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:13:21,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:13:21,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146242409] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:21,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:21,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 28 [2024-09-12 22:13:21,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246778303] [2024-09-12 22:13:21,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:21,342 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 22:13:21,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 22:13:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-09-12 22:13:21,343 INFO L87 Difference]: Start difference. First operand 429 states and 589 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:23,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:23,917 INFO L93 Difference]: Finished difference Result 916 states and 1289 transitions. [2024-09-12 22:13:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-09-12 22:13:23,918 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-12 22:13:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:23,921 INFO L225 Difference]: With dead ends: 916 [2024-09-12 22:13:23,921 INFO L226 Difference]: Without dead ends: 581 [2024-09-12 22:13:23,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=940, Invalid=5702, Unknown=0, NotChecked=0, Total=6642 [2024-09-12 22:13:23,924 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 213 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:23,924 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 608 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 22:13:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2024-09-12 22:13:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 445. [2024-09-12 22:13:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.3590909090909091) internal successors, (598), 440 states have internal predecessors, (598), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 602 transitions. [2024-09-12 22:13:24,114 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 602 transitions. Word has length 34 [2024-09-12 22:13:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:24,115 INFO L474 AbstractCegarLoop]: Abstraction has 445 states and 602 transitions. [2024-09-12 22:13:24,115 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:24,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 602 transitions. [2024-09-12 22:13:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 22:13:24,117 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:24,117 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:24,132 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-12 22:13:24,321 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:24,322 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:24,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2108590391, now seen corresponding path program 4 times [2024-09-12 22:13:24,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:24,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341886040] [2024-09-12 22:13:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:24,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:24,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 22:13:24,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:24,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341886040] [2024-09-12 22:13:24,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341886040] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:24,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106244443] [2024-09-12 22:13:24,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:13:24,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:24,568 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:24,572 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 22:13:24,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:13:24,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:24,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 22:13:24,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:13:24,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 22:13:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106244443] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:24,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 6] total 20 [2024-09-12 22:13:24,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618495051] [2024-09-12 22:13:24,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:24,789 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 22:13:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 22:13:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-12 22:13:24,792 INFO L87 Difference]: Start difference. First operand 445 states and 602 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:25,898 INFO L93 Difference]: Finished difference Result 918 states and 1325 transitions. [2024-09-12 22:13:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 22:13:25,899 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-12 22:13:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:25,902 INFO L225 Difference]: With dead ends: 918 [2024-09-12 22:13:25,902 INFO L226 Difference]: Without dead ends: 780 [2024-09-12 22:13:25,903 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 22:13:25,903 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 154 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:25,903 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 535 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 22:13:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2024-09-12 22:13:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 534. [2024-09-12 22:13:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 529 states have (on average 1.3761814744801513) internal successors, (728), 529 states have internal predecessors, (728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 732 transitions. [2024-09-12 22:13:26,094 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 732 transitions. Word has length 37 [2024-09-12 22:13:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:26,094 INFO L474 AbstractCegarLoop]: Abstraction has 534 states and 732 transitions. [2024-09-12 22:13:26,094 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:26,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 732 transitions. [2024-09-12 22:13:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 22:13:26,095 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:26,095 INFO L216 NwaCegarLoop]: trace histogram [10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:26,107 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:26,295 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-12 22:13:26,296 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:26,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1423913430, now seen corresponding path program 6 times [2024-09-12 22:13:26,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:26,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284918249] [2024-09-12 22:13:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:26,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:26,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:13:26,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284918249] [2024-09-12 22:13:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284918249] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308028196] [2024-09-12 22:13:26,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:13:26,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:26,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:26,530 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:26,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 22:13:26,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 22:13:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:26,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 22:13:26,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 22:13:26,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 22:13:27,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308028196] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:27,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:27,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 11] total 30 [2024-09-12 22:13:27,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348605706] [2024-09-12 22:13:27,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:27,182 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:13:27,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:13:27,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:13:27,183 INFO L87 Difference]: Start difference. First operand 534 states and 732 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:29,887 INFO L93 Difference]: Finished difference Result 1030 states and 1483 transitions. [2024-09-12 22:13:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-12 22:13:29,888 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-12 22:13:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:29,891 INFO L225 Difference]: With dead ends: 1030 [2024-09-12 22:13:29,891 INFO L226 Difference]: Without dead ends: 709 [2024-09-12 22:13:29,893 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=802, Invalid=7570, Unknown=0, NotChecked=0, Total=8372 [2024-09-12 22:13:29,894 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:29,894 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 820 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 22:13:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2024-09-12 22:13:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 529. [2024-09-12 22:13:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 524 states have (on average 1.3587786259541985) internal successors, (712), 524 states have internal predecessors, (712), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 716 transitions. [2024-09-12 22:13:30,124 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 716 transitions. Word has length 37 [2024-09-12 22:13:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:30,125 INFO L474 AbstractCegarLoop]: Abstraction has 529 states and 716 transitions. [2024-09-12 22:13:30,125 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:30,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 716 transitions. [2024-09-12 22:13:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 22:13:30,126 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:30,126 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:30,140 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:30,327 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-12 22:13:30,327 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:30,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:30,328 INFO L85 PathProgramCache]: Analyzing trace with hash 52817055, now seen corresponding path program 7 times [2024-09-12 22:13:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:30,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476245094] [2024-09-12 22:13:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:30,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 22:13:30,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476245094] [2024-09-12 22:13:30,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476245094] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556127037] [2024-09-12 22:13:30,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:13:30,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:30,484 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:30,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 22:13:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:30,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 22:13:30,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 22:13:30,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 22:13:30,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556127037] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:30,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:30,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-12 22:13:30,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054105935] [2024-09-12 22:13:30,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:30,666 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 22:13:30,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 22:13:30,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:13:30,667 INFO L87 Difference]: Start difference. First operand 529 states and 716 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:31,345 INFO L93 Difference]: Finished difference Result 823 states and 1090 transitions. [2024-09-12 22:13:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 22:13:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-12 22:13:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:31,349 INFO L225 Difference]: With dead ends: 823 [2024-09-12 22:13:31,349 INFO L226 Difference]: Without dead ends: 785 [2024-09-12 22:13:31,349 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:13:31,350 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:31,350 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 175 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:13:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2024-09-12 22:13:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 555. [2024-09-12 22:13:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.3545454545454545) internal successors, (745), 550 states have internal predecessors, (745), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 749 transitions. [2024-09-12 22:13:31,599 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 749 transitions. Word has length 38 [2024-09-12 22:13:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:31,599 INFO L474 AbstractCegarLoop]: Abstraction has 555 states and 749 transitions. [2024-09-12 22:13:31,599 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:31,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 749 transitions. [2024-09-12 22:13:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 22:13:31,601 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:31,601 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:31,619 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-12 22:13:31,801 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-12 22:13:31,801 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:31,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1717896673, now seen corresponding path program 3 times [2024-09-12 22:13:31,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:31,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857083810] [2024-09-12 22:13:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:31,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:32,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 22:13:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:32,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857083810] [2024-09-12 22:13:32,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857083810] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:32,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332327411] [2024-09-12 22:13:32,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:13:32,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:32,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:32,043 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:32,045 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 22:13:32,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:13:32,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:32,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 22:13:32,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 22:13:32,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 22:13:32,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332327411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:32,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:32,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-12 22:13:32,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298845436] [2024-09-12 22:13:32,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:32,530 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:13:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:13:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:13:32,532 INFO L87 Difference]: Start difference. First operand 555 states and 749 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:35,037 INFO L93 Difference]: Finished difference Result 1179 states and 1672 transitions. [2024-09-12 22:13:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-09-12 22:13:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-12 22:13:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:35,041 INFO L225 Difference]: With dead ends: 1179 [2024-09-12 22:13:35,041 INFO L226 Difference]: Without dead ends: 1065 [2024-09-12 22:13:35,043 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1538, Invalid=5944, Unknown=0, NotChecked=0, Total=7482 [2024-09-12 22:13:35,044 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 290 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:35,044 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 387 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 22:13:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2024-09-12 22:13:35,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 659. [2024-09-12 22:13:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 654 states have (on average 1.3516819571865444) internal successors, (884), 654 states have internal predecessors, (884), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 888 transitions. [2024-09-12 22:13:35,416 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 888 transitions. Word has length 38 [2024-09-12 22:13:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:35,417 INFO L474 AbstractCegarLoop]: Abstraction has 659 states and 888 transitions. [2024-09-12 22:13:35,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:35,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 888 transitions. [2024-09-12 22:13:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 22:13:35,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:35,419 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:35,435 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-12 22:13:35,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-12 22:13:35,623 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:35,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash 171159391, now seen corresponding path program 8 times [2024-09-12 22:13:35,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:35,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787039042] [2024-09-12 22:13:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:35,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 22:13:35,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:35,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787039042] [2024-09-12 22:13:35,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787039042] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:35,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462067293] [2024-09-12 22:13:35,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:13:35,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:35,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:35,913 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:35,914 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 22:13:35,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:13:35,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:35,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 22:13:35,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 22:13:36,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 22:13:36,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462067293] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:36,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:36,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2024-09-12 22:13:36,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715348154] [2024-09-12 22:13:36,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:36,280 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 22:13:36,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 22:13:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:13:36,281 INFO L87 Difference]: Start difference. First operand 659 states and 888 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:36,986 INFO L93 Difference]: Finished difference Result 952 states and 1240 transitions. [2024-09-12 22:13:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 22:13:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-12 22:13:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:36,990 INFO L225 Difference]: With dead ends: 952 [2024-09-12 22:13:36,990 INFO L226 Difference]: Without dead ends: 828 [2024-09-12 22:13:36,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 26 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-12 22:13:36,991 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:36,991 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 206 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:13:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2024-09-12 22:13:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 659. [2024-09-12 22:13:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 654 states have (on average 1.342507645259939) internal successors, (878), 654 states have internal predecessors, (878), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 882 transitions. [2024-09-12 22:13:37,450 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 882 transitions. Word has length 40 [2024-09-12 22:13:37,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:37,450 INFO L474 AbstractCegarLoop]: Abstraction has 659 states and 882 transitions. [2024-09-12 22:13:37,450 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:37,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:37,450 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 882 transitions. [2024-09-12 22:13:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 22:13:37,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:37,452 INFO L216 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:37,468 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-12 22:13:37,655 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-12 22:13:37,656 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:37,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash 520169312, now seen corresponding path program 9 times [2024-09-12 22:13:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:37,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802713381] [2024-09-12 22:13:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:37,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 22:13:37,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:37,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802713381] [2024-09-12 22:13:37,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802713381] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:37,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186839348] [2024-09-12 22:13:37,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:13:37,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:37,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:37,931 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:37,933 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 22:13:37,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:13:37,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:37,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 22:13:37,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-12 22:13:38,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-12 22:13:38,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186839348] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:38,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:38,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 22 [2024-09-12 22:13:38,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727324384] [2024-09-12 22:13:38,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:38,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 22:13:38,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:38,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 22:13:38,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:13:38,219 INFO L87 Difference]: Start difference. First operand 659 states and 882 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:39,581 INFO L93 Difference]: Finished difference Result 1366 states and 1918 transitions. [2024-09-12 22:13:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 22:13:39,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-12 22:13:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:39,586 INFO L225 Difference]: With dead ends: 1366 [2024-09-12 22:13:39,586 INFO L226 Difference]: Without dead ends: 1071 [2024-09-12 22:13:39,587 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 22:13:39,587 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 288 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:39,588 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 764 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 22:13:39,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2024-09-12 22:13:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 683. [2024-09-12 22:13:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.345132743362832) internal successors, (912), 678 states have internal predecessors, (912), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 916 transitions. [2024-09-12 22:13:40,009 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 916 transitions. Word has length 40 [2024-09-12 22:13:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:40,009 INFO L474 AbstractCegarLoop]: Abstraction has 683 states and 916 transitions. [2024-09-12 22:13:40,009 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:40,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 916 transitions. [2024-09-12 22:13:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 22:13:40,011 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:40,011 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:40,028 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-12 22:13:40,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-12 22:13:40,216 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:40,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash -245472181, now seen corresponding path program 4 times [2024-09-12 22:13:40,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:40,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010866776] [2024-09-12 22:13:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:40,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:40,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-12 22:13:40,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:40,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010866776] [2024-09-12 22:13:40,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010866776] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:40,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987807455] [2024-09-12 22:13:40,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:13:40,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:40,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:40,490 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:40,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 22:13:40,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:13:40,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:40,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 22:13:40,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-12 22:13:40,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-12 22:13:41,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987807455] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:41,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:41,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2024-09-12 22:13:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717534197] [2024-09-12 22:13:41,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:41,005 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 22:13:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 22:13:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 22:13:41,006 INFO L87 Difference]: Start difference. First operand 683 states and 916 transitions. Second operand has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:14:21,824 INFO L93 Difference]: Finished difference Result 1819 states and 2541 transitions. [2024-09-12 22:14:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 528 states. [2024-09-12 22:14:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-12 22:14:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:14:21,830 INFO L225 Difference]: With dead ends: 1819 [2024-09-12 22:14:21,831 INFO L226 Difference]: Without dead ends: 1490 [2024-09-12 22:14:21,892 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 527 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132299 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=34017, Invalid=245295, Unknown=0, NotChecked=0, Total=279312 [2024-09-12 22:14:21,893 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 1728 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 1568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1568 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:21,893 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 628 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1568 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-12 22:14:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2024-09-12 22:14:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 778. [2024-09-12 22:14:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 773 states have (on average 1.3570504527813714) internal successors, (1049), 773 states have internal predecessors, (1049), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1053 transitions. [2024-09-12 22:14:22,638 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1053 transitions. Word has length 41 [2024-09-12 22:14:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:14:22,639 INFO L474 AbstractCegarLoop]: Abstraction has 778 states and 1053 transitions. [2024-09-12 22:14:22,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:22,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1053 transitions. [2024-09-12 22:14:22,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:14:22,641 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:14:22,641 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:14:22,656 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-12 22:14:22,841 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-12 22:14:22,841 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:14:22,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:22,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1706754144, now seen corresponding path program 10 times [2024-09-12 22:14:22,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:14:22,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125271501] [2024-09-12 22:14:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:14:22,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:14:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:23,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:14:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:14:23,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:14:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125271501] [2024-09-12 22:14:23,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125271501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:14:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138212723] [2024-09-12 22:14:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:14:23,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:14:23,107 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:14:23,108 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-12 22:14:23,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:14:23,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:14:23,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 22:14:23,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:14:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 22:14:23,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:14:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 22:14:23,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138212723] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:14:23,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:14:23,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 24 [2024-09-12 22:14:23,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925389296] [2024-09-12 22:14:23,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:14:23,403 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 22:14:23,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:14:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 22:14:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:14:23,404 INFO L87 Difference]: Start difference. First operand 778 states and 1053 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:31,554 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 43 DAG size of output: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:14:39,752 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 38 DAG size of output: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:14:47,827 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:14:55,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:04,023 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:15:12,193 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:15:20,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:28,929 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:15:41,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:45,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:49,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:54,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:58,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:02,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:06,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:10,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:26,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:30,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:06,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:10,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:27,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:31,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:35,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:39,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:43,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:55,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:59,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:18:43,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:18:47,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:19:03,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:19:07,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:19:51,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:19:55,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:19:59,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:19,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:23,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:27,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:31,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:35,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:39,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:43,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:47,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:51,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:55,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:20:59,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:21:04,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:21:08,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:21:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:09,092 INFO L93 Difference]: Finished difference Result 2417 states and 3390 transitions. [2024-09-12 22:21:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-12 22:21:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 22:21:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:09,098 INFO L225 Difference]: With dead ends: 2417 [2024-09-12 22:21:09,099 INFO L226 Difference]: Without dead ends: 2166 [2024-09-12 22:21:09,099 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 238.8s TimeCoverageRelationStatistics Valid=1091, Invalid=2529, Unknown=40, NotChecked=0, Total=3660 [2024-09-12 22:21:09,100 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 242 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 227 mSolverCounterUnsat, 41 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 41 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.6s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:09,100 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 356 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 268 Invalid, 41 Unknown, 0 Unchecked, 164.6s Time] [2024-09-12 22:21:09,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2024-09-12 22:21:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 941. [2024-09-12 22:21:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 936 states have (on average 1.4006410256410255) internal successors, (1311), 936 states have internal predecessors, (1311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1315 transitions. [2024-09-12 22:21:09,898 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1315 transitions. Word has length 42 [2024-09-12 22:21:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:09,899 INFO L474 AbstractCegarLoop]: Abstraction has 941 states and 1315 transitions. [2024-09-12 22:21:09,899 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:09,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1315 transitions. [2024-09-12 22:21:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:21:09,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:09,900 INFO L216 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:09,918 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-12 22:21:10,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:10,101 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:10,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1818242915, now seen corresponding path program 11 times [2024-09-12 22:21:10,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:10,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440147690] [2024-09-12 22:21:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:10,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:10,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:21:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:10,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440147690] [2024-09-12 22:21:10,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440147690] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:10,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103667561] [2024-09-12 22:21:10,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:21:10,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:10,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:10,426 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:10,427 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-12 22:21:10,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-12 22:21:10,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:21:10,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-12 22:21:10,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:21:10,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:21:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-12 22:21:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103667561] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:21:10,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:21:10,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 6] total 23 [2024-09-12 22:21:10,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392179970] [2024-09-12 22:21:10,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:21:10,778 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 22:21:10,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:21:10,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 22:21:10,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-09-12 22:21:10,779 INFO L87 Difference]: Start difference. First operand 941 states and 1315 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:12,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:12,803 INFO L93 Difference]: Finished difference Result 1882 states and 2695 transitions. [2024-09-12 22:21:12,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 22:21:12,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 22:21:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:12,810 INFO L225 Difference]: With dead ends: 1882 [2024-09-12 22:21:12,810 INFO L226 Difference]: Without dead ends: 1496 [2024-09-12 22:21:12,811 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 22:21:12,811 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 275 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:12,811 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 816 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 22:21:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2024-09-12 22:21:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1111. [2024-09-12 22:21:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1106 states have (on average 1.3860759493670887) internal successors, (1533), 1106 states have internal predecessors, (1533), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1537 transitions. [2024-09-12 22:21:13,735 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1537 transitions. Word has length 42 [2024-09-12 22:21:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:13,736 INFO L474 AbstractCegarLoop]: Abstraction has 1111 states and 1537 transitions. [2024-09-12 22:21:13,736 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:13,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1537 transitions. [2024-09-12 22:21:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 22:21:13,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:13,738 INFO L216 NwaCegarLoop]: trace histogram [13, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:13,756 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-12 22:21:13,942 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:13,943 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:13,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash 354078411, now seen corresponding path program 5 times [2024-09-12 22:21:13,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:13,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740792306] [2024-09-12 22:21:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:14,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 22:21:14,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740792306] [2024-09-12 22:21:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740792306] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575701700] [2024-09-12 22:21:14,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:21:14,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:14,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:14,268 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:14,272 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-12 22:21:14,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 22:21:14,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:21:14,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-12 22:21:14,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:21:14,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:21:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-09-12 22:21:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575701700] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:21:14,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:21:14,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 13] total 40 [2024-09-12 22:21:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405871752] [2024-09-12 22:21:14,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:21:14,960 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 22:21:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:21:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 22:21:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 22:21:14,961 INFO L87 Difference]: Start difference. First operand 1111 states and 1537 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:18,886 INFO L93 Difference]: Finished difference Result 1981 states and 2822 transitions. [2024-09-12 22:21:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-12 22:21:18,887 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-12 22:21:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:18,894 INFO L225 Difference]: With dead ends: 1981 [2024-09-12 22:21:18,894 INFO L226 Difference]: Without dead ends: 1525 [2024-09-12 22:21:18,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1388, Invalid=6984, Unknown=0, NotChecked=0, Total=8372 [2024-09-12 22:21:18,897 INFO L434 NwaCegarLoop]: 74 mSDtfsCounter, 386 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 2504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:18,898 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1066 Invalid, 2504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-12 22:21:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2024-09-12 22:21:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1252. [2024-09-12 22:21:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1247 states have (on average 1.3672814755412992) internal successors, (1705), 1247 states have internal predecessors, (1705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1709 transitions. [2024-09-12 22:21:19,967 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1709 transitions. Word has length 43 [2024-09-12 22:21:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:19,967 INFO L474 AbstractCegarLoop]: Abstraction has 1252 states and 1709 transitions. [2024-09-12 22:21:19,967 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:19,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1709 transitions. [2024-09-12 22:21:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 22:21:19,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:19,969 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:19,987 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-12 22:21:20,170 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:20,170 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:20,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash -705458464, now seen corresponding path program 12 times [2024-09-12 22:21:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811670533] [2024-09-12 22:21:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:20,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:21:20,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811670533] [2024-09-12 22:21:20,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811670533] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719220074] [2024-09-12 22:21:20,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:21:20,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:20,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:20,481 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:20,482 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-12 22:21:20,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 22:21:20,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:21:20,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 22:21:20,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 22:21:20,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:21:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 22:21:20,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719220074] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:21:20,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:21:20,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-09-12 22:21:20,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567363206] [2024-09-12 22:21:20,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:21:20,692 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 22:21:20,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:21:20,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 22:21:20,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-09-12 22:21:20,693 INFO L87 Difference]: Start difference. First operand 1252 states and 1709 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:22,412 INFO L93 Difference]: Finished difference Result 1551 states and 2069 transitions. [2024-09-12 22:21:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:21:22,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-12 22:21:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:22,418 INFO L225 Difference]: With dead ends: 1551 [2024-09-12 22:21:22,418 INFO L226 Difference]: Without dead ends: 1515 [2024-09-12 22:21:22,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 18 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:21:22,419 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:22,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 280 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:21:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2024-09-12 22:21:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1259. [2024-09-12 22:21:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1254 states have (on average 1.372408293460925) internal successors, (1721), 1254 states have internal predecessors, (1721), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1725 transitions. [2024-09-12 22:21:23,403 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1725 transitions. Word has length 46 [2024-09-12 22:21:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:23,403 INFO L474 AbstractCegarLoop]: Abstraction has 1259 states and 1725 transitions. [2024-09-12 22:21:23,403 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:23,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1725 transitions. [2024-09-12 22:21:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 22:21:23,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:23,405 INFO L216 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:23,418 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-12 22:21:23,605 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-12 22:21:23,606 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:23,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash 6792223, now seen corresponding path program 6 times [2024-09-12 22:21:23,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:23,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325119847] [2024-09-12 22:21:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:23,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:23,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:21:23,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:23,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325119847] [2024-09-12 22:21:23,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325119847] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:23,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018437428] [2024-09-12 22:21:23,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:21:23,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:23,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:23,940 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:23,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-12 22:21:23,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 22:21:23,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:21:23,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:21:23,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-09-12 22:21:24,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:21:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-09-12 22:21:24,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018437428] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:21:24,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:21:24,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7, 7] total 27 [2024-09-12 22:21:24,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420502234] [2024-09-12 22:21:24,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:21:24,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 22:21:24,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:21:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 22:21:24,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-09-12 22:21:24,317 INFO L87 Difference]: Start difference. First operand 1259 states and 1725 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:27,131 INFO L93 Difference]: Finished difference Result 2465 states and 3570 transitions. [2024-09-12 22:21:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-12 22:21:27,132 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-12 22:21:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:27,138 INFO L225 Difference]: With dead ends: 2465 [2024-09-12 22:21:27,138 INFO L226 Difference]: Without dead ends: 2052 [2024-09-12 22:21:27,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=542, Invalid=1810, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 22:21:27,140 INFO L434 NwaCegarLoop]: 76 mSDtfsCounter, 394 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:27,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1138 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 22:21:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2024-09-12 22:21:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1527. [2024-09-12 22:21:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1522 states have (on average 1.352168199737188) internal successors, (2058), 1522 states have internal predecessors, (2058), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:28,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2062 transitions. [2024-09-12 22:21:28,413 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2062 transitions. Word has length 46 [2024-09-12 22:21:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:28,413 INFO L474 AbstractCegarLoop]: Abstraction has 1527 states and 2062 transitions. [2024-09-12 22:21:28,413 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:28,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2062 transitions. [2024-09-12 22:21:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 22:21:28,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:28,415 INFO L216 NwaCegarLoop]: trace histogram [12, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:28,432 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-12 22:21:28,615 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-12 22:21:28,616 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:28,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1474897977, now seen corresponding path program 5 times [2024-09-12 22:21:28,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:28,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070453745] [2024-09-12 22:21:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:28,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:28,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-12 22:21:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070453745] [2024-09-12 22:21:28,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070453745] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581370280] [2024-09-12 22:21:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:21:28,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:28,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:28,959 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:28,960 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-12 22:21:29,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-12 22:21:29,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:21:29,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-09-12 22:21:29,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:21:29,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:21:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:21:30,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581370280] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:21:30,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:21:30,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 26] total 64 [2024-09-12 22:21:30,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102763172] [2024-09-12 22:21:30,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:21:30,646 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-12 22:21:30,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:21:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-12 22:21:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=3205, Unknown=0, NotChecked=0, Total=4032 [2024-09-12 22:21:30,648 INFO L87 Difference]: Start difference. First operand 1527 states and 2062 transitions. Second operand has 64 states, 64 states have (on average 1.421875) internal successors, (91), 64 states have internal predecessors, (91), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:40,987 INFO L93 Difference]: Finished difference Result 2204 states and 2996 transitions. [2024-09-12 22:21:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-09-12 22:21:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.421875) internal successors, (91), 64 states have internal predecessors, (91), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2024-09-12 22:21:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:40,994 INFO L225 Difference]: With dead ends: 2204 [2024-09-12 22:21:40,994 INFO L226 Difference]: Without dead ends: 1979 [2024-09-12 22:21:40,996 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9313 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=5903, Invalid=20829, Unknown=0, NotChecked=0, Total=26732 [2024-09-12 22:21:40,997 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 347 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 3491 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 4082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 3491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:40,997 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 689 Invalid, 4082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 3491 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-12 22:21:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2024-09-12 22:21:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1614. [2024-09-12 22:21:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1609 states have (on average 1.3418272218769423) internal successors, (2159), 1609 states have internal predecessors, (2159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2163 transitions. [2024-09-12 22:21:42,360 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2163 transitions. Word has length 47 [2024-09-12 22:21:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:42,361 INFO L474 AbstractCegarLoop]: Abstraction has 1614 states and 2163 transitions. [2024-09-12 22:21:42,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.421875) internal successors, (91), 64 states have internal predecessors, (91), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:42,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2163 transitions. [2024-09-12 22:21:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 22:21:42,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:42,364 INFO L216 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:42,376 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-12 22:21:42,564 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-12 22:21:42,564 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:42,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1813622775, now seen corresponding path program 13 times [2024-09-12 22:21:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:42,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41143978] [2024-09-12 22:21:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:42,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:42,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 22:21:42,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:42,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41143978] [2024-09-12 22:21:42,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41143978] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:42,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95397099] [2024-09-12 22:21:42,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:21:42,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:42,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:42,900 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:42,901 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-12 22:21:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:42,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-12 22:21:42,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 22:21:43,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:21:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-12 22:21:43,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95397099] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:21:43,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:21:43,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 10] total 34 [2024-09-12 22:21:43,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939123622] [2024-09-12 22:21:43,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:21:43,332 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 22:21:43,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:21:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 22:21:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 22:21:43,333 INFO L87 Difference]: Start difference. First operand 1614 states and 2163 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:48,483 INFO L93 Difference]: Finished difference Result 2675 states and 3760 transitions. [2024-09-12 22:21:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2024-09-12 22:21:48,483 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2024-09-12 22:21:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:48,490 INFO L225 Difference]: With dead ends: 2675 [2024-09-12 22:21:48,490 INFO L226 Difference]: Without dead ends: 1915 [2024-09-12 22:21:48,492 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=760, Invalid=11450, Unknown=0, NotChecked=0, Total=12210 [2024-09-12 22:21:48,492 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 149 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 2514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:48,492 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1463 Invalid, 2514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-12 22:21:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2024-09-12 22:21:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1594. [2024-09-12 22:21:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1589 states have (on average 1.3455003146633102) internal successors, (2138), 1589 states have internal predecessors, (2138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2142 transitions. [2024-09-12 22:21:49,853 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2142 transitions. Word has length 47 [2024-09-12 22:21:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:49,854 INFO L474 AbstractCegarLoop]: Abstraction has 1594 states and 2142 transitions. [2024-09-12 22:21:49,854 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:49,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2142 transitions. [2024-09-12 22:21:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 22:21:49,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:49,857 INFO L216 NwaCegarLoop]: trace histogram [12, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:49,875 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-12 22:21:50,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-12 22:21:50,058 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:50,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1226439733, now seen corresponding path program 6 times [2024-09-12 22:21:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:50,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380777848] [2024-09-12 22:21:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:50,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:50,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-12 22:21:50,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:50,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380777848] [2024-09-12 22:21:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380777848] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:50,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856851010] [2024-09-12 22:21:50,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:21:50,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:50,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:50,472 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:50,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-12 22:21:50,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 22:21:50,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:21:50,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-12 22:21:50,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:21:51,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:21:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 42 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 22:21:51,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856851010] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:21:51,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:21:51,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 34, 12] total 50 [2024-09-12 22:21:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131980654] [2024-09-12 22:21:51,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:21:51,372 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 22:21:51,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:21:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 22:21:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2058, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 22:21:51,373 INFO L87 Difference]: Start difference. First operand 1594 states and 2142 transitions. Second operand has 50 states, 50 states have (on average 1.8) internal successors, (90), 50 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:57,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:21:57,481 INFO L93 Difference]: Finished difference Result 2243 states and 3071 transitions. [2024-09-12 22:21:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-09-12 22:21:57,482 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 50 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2024-09-12 22:21:57,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:21:57,491 INFO L225 Difference]: With dead ends: 2243 [2024-09-12 22:21:57,492 INFO L226 Difference]: Without dead ends: 2022 [2024-09-12 22:21:57,493 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7034 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3552, Invalid=16470, Unknown=0, NotChecked=0, Total=20022 [2024-09-12 22:21:57,494 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 455 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 4570 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 4874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 4570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-12 22:21:57,494 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 848 Invalid, 4874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 4570 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-12 22:21:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2024-09-12 22:21:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1633. [2024-09-12 22:21:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1628 states have (on average 1.3427518427518428) internal successors, (2186), 1628 states have internal predecessors, (2186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 2190 transitions. [2024-09-12 22:21:58,954 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 2190 transitions. Word has length 49 [2024-09-12 22:21:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:21:58,954 INFO L474 AbstractCegarLoop]: Abstraction has 1633 states and 2190 transitions. [2024-09-12 22:21:58,955 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 50 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:21:58,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 2190 transitions. [2024-09-12 22:21:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 22:21:58,957 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:21:58,957 INFO L216 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:21:58,978 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-12 22:21:59,158 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-12 22:21:59,158 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:21:59,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:21:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1241558582, now seen corresponding path program 14 times [2024-09-12 22:21:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:21:59,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958353245] [2024-09-12 22:21:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:21:59,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:21:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:59,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:21:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:21:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-12 22:21:59,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:21:59,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958353245] [2024-09-12 22:21:59,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958353245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:21:59,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30159824] [2024-09-12 22:21:59,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:21:59,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:21:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:21:59,622 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:21:59,623 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-12 22:21:59,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:21:59,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:21:59,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-12 22:21:59,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:21:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 22:21:59,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:22:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-09-12 22:22:00,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30159824] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:22:00,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:22:00,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 9] total 33 [2024-09-12 22:22:00,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865080594] [2024-09-12 22:22:00,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:22:00,067 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 22:22:00,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:22:00,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 22:22:00,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 22:22:00,068 INFO L87 Difference]: Start difference. First operand 1633 states and 2190 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:22:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:22:03,747 INFO L93 Difference]: Finished difference Result 2910 states and 4177 transitions. [2024-09-12 22:22:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-12 22:22:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2024-09-12 22:22:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:22:03,755 INFO L225 Difference]: With dead ends: 2910 [2024-09-12 22:22:03,755 INFO L226 Difference]: Without dead ends: 2408 [2024-09-12 22:22:03,757 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=760, Invalid=2320, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 22:22:03,758 INFO L434 NwaCegarLoop]: 87 mSDtfsCounter, 391 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 2322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:22:03,758 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1525 Invalid, 2322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 22:22:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2024-09-12 22:22:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1619. [2024-09-12 22:22:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1614 states have (on average 1.358736059479554) internal successors, (2193), 1614 states have internal predecessors, (2193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:22:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 2197 transitions. [2024-09-12 22:22:05,258 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 2197 transitions. Word has length 49 [2024-09-12 22:22:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:22:05,258 INFO L474 AbstractCegarLoop]: Abstraction has 1619 states and 2197 transitions. [2024-09-12 22:22:05,258 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:22:05,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:22:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 2197 transitions. [2024-09-12 22:22:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 22:22:05,261 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:22:05,261 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:22:05,278 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-12 22:22:05,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-12 22:22:05,466 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:22:05,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:22:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash -367454977, now seen corresponding path program 15 times [2024-09-12 22:22:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:22:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753178955] [2024-09-12 22:22:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:22:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:22:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:05,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:22:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 22:22:05,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:22:05,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753178955] [2024-09-12 22:22:05,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753178955] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:22:05,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742703001] [2024-09-12 22:22:05,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:22:05,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:22:05,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:22:05,654 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:22:05,656 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-12 22:22:05,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:22:05,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:22:05,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 22:22:05,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:22:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:22:05,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:22:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:22:06,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742703001] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:22:06,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:22:06,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-09-12 22:22:06,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269990617] [2024-09-12 22:22:06,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:22:06,010 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 22:22:06,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:22:06,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 22:22:06,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-09-12 22:22:06,011 INFO L87 Difference]: Start difference. First operand 1619 states and 2197 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:22:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:22:12,851 INFO L93 Difference]: Finished difference Result 3565 states and 4644 transitions. [2024-09-12 22:22:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-12 22:22:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2024-09-12 22:22:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:22:12,860 INFO L225 Difference]: With dead ends: 3565 [2024-09-12 22:22:12,860 INFO L226 Difference]: Without dead ends: 3268 [2024-09-12 22:22:12,861 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 88 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=542, Invalid=1620, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 22:22:12,862 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 261 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:22:12,862 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 251 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:22:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2024-09-12 22:22:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 1668. [2024-09-12 22:22:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1663 states have (on average 1.3505712567648827) internal successors, (2246), 1663 states have internal predecessors, (2246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:22:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2250 transitions. [2024-09-12 22:22:14,605 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2250 transitions. Word has length 50 [2024-09-12 22:22:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:22:14,605 INFO L474 AbstractCegarLoop]: Abstraction has 1668 states and 2250 transitions. [2024-09-12 22:22:14,605 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:22:14,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:22:14,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2250 transitions. [2024-09-12 22:22:14,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 22:22:14,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:22:14,607 INFO L216 NwaCegarLoop]: trace histogram [12, 10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:22:14,619 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-12 22:22:14,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-12 22:22:14,808 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:22:14,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:22:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 391481209, now seen corresponding path program 7 times [2024-09-12 22:22:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:22:14,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730041546] [2024-09-12 22:22:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:22:14,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:22:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:15,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:22:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-12 22:22:15,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:22:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730041546] [2024-09-12 22:22:15,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730041546] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:22:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634815957] [2024-09-12 22:22:15,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:22:15,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:22:15,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:22:15,254 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:22:15,259 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-12 22:22:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:22:15,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-12 22:22:15,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:22:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-12 22:22:15,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:22:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-12 22:22:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634815957] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:22:16,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:22:16,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 50 [2024-09-12 22:22:16,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643623830] [2024-09-12 22:22:16,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:22:16,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 22:22:16,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:22:16,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 22:22:16,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2083, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 22:22:16,279 INFO L87 Difference]: Start difference. First operand 1668 states and 2250 transitions. Second operand has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:18,727 INFO L93 Difference]: Finished difference Result 4437 states and 6501 transitions. [2024-09-12 22:26:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1321 states. [2024-09-12 22:26:18,728 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-12 22:26:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:18,739 INFO L225 Difference]: With dead ends: 4437 [2024-09-12 22:26:18,739 INFO L226 Difference]: Without dead ends: 3857 [2024-09-12 22:26:18,843 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 1321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884149 ImplicationChecksByTransitivity, 222.5s TimeCoverageRelationStatistics Valid=186019, Invalid=1562987, Unknown=0, NotChecked=0, Total=1749006 [2024-09-12 22:26:18,845 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 5957 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 5035 mSolverCounterSat, 5556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5957 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 10591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5556 IncrementalHoareTripleChecker+Valid, 5035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:18,845 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5957 Valid, 868 Invalid, 10591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5556 Valid, 5035 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2024-09-12 22:26:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2024-09-12 22:26:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 2116. [2024-09-12 22:26:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2111 states have (on average 1.417337754618664) internal successors, (2992), 2111 states have internal predecessors, (2992), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 2996 transitions. [2024-09-12 22:26:22,667 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 2996 transitions. Word has length 51 [2024-09-12 22:26:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:22,668 INFO L474 AbstractCegarLoop]: Abstraction has 2116 states and 2996 transitions. [2024-09-12 22:26:22,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:22,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 2996 transitions. [2024-09-12 22:26:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 22:26:22,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:22,672 INFO L216 NwaCegarLoop]: trace histogram [17, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:22,688 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-12 22:26:22,872 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-12 22:26:22,873 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:22,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:22,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1710466315, now seen corresponding path program 16 times [2024-09-12 22:26:22,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:22,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924736083] [2024-09-12 22:26:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:22,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:23,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-12 22:26:23,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924736083] [2024-09-12 22:26:23,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924736083] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035538815] [2024-09-12 22:26:23,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:26:23,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:23,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:23,362 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:26:23,364 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-12 22:26:23,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:26:23,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:26:23,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-12 22:26:23,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:26:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-12 22:26:23,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:26:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2024-09-12 22:26:23,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035538815] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:26:23,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:26:23,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 10] total 36 [2024-09-12 22:26:23,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215457183] [2024-09-12 22:26:23,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:26:23,837 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 22:26:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:26:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 22:26:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 22:26:23,838 INFO L87 Difference]: Start difference. First operand 2116 states and 2996 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:30,717 INFO L93 Difference]: Finished difference Result 3845 states and 5648 transitions. [2024-09-12 22:26:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-12 22:26:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-12 22:26:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:30,725 INFO L225 Difference]: With dead ends: 3845 [2024-09-12 22:26:30,725 INFO L226 Difference]: Without dead ends: 3006 [2024-09-12 22:26:30,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=974, Invalid=2808, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 22:26:30,727 INFO L434 NwaCegarLoop]: 93 mSDtfsCounter, 371 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:30,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1752 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-12 22:26:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2024-09-12 22:26:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2229. [2024-09-12 22:26:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2224 states have (on average 1.41636690647482) internal successors, (3150), 2224 states have internal predecessors, (3150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 3154 transitions. [2024-09-12 22:26:33,880 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 3154 transitions. Word has length 51 [2024-09-12 22:26:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:33,880 INFO L474 AbstractCegarLoop]: Abstraction has 2229 states and 3154 transitions. [2024-09-12 22:26:33,880 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:33,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 3154 transitions. [2024-09-12 22:26:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 22:26:33,882 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:33,883 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:33,895 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-12 22:26:34,084 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:34,085 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:34,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:34,085 INFO L85 PathProgramCache]: Analyzing trace with hash -494035073, now seen corresponding path program 17 times [2024-09-12 22:26:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:34,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799310559] [2024-09-12 22:26:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:34,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:34,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:26:34,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:34,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799310559] [2024-09-12 22:26:34,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799310559] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:34,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169621995] [2024-09-12 22:26:34,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:26:34,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:34,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:34,531 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:26:34,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-12 22:26:34,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 22:26:34,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:26:34,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-12 22:26:34,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:26:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:26:34,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:26:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:26:35,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169621995] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:26:35,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:26:35,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2024-09-12 22:26:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995209181] [2024-09-12 22:26:35,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:26:35,194 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 22:26:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:26:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 22:26:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:26:35,195 INFO L87 Difference]: Start difference. First operand 2229 states and 3154 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:41,282 INFO L93 Difference]: Finished difference Result 2971 states and 4063 transitions. [2024-09-12 22:26:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 22:26:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2024-09-12 22:26:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:41,291 INFO L225 Difference]: With dead ends: 2971 [2024-09-12 22:26:41,291 INFO L226 Difference]: Without dead ends: 2930 [2024-09-12 22:26:41,292 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 34 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:26:41,292 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:41,293 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 379 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:26:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2024-09-12 22:26:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2236. [2024-09-12 22:26:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2231 states have (on average 1.4190945764231286) internal successors, (3166), 2231 states have internal predecessors, (3166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 3170 transitions. [2024-09-12 22:26:44,405 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 3170 transitions. Word has length 52 [2024-09-12 22:26:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:44,406 INFO L474 AbstractCegarLoop]: Abstraction has 2236 states and 3170 transitions. [2024-09-12 22:26:44,406 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:44,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 3170 transitions. [2024-09-12 22:26:44,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 22:26:44,408 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:44,408 INFO L216 NwaCegarLoop]: trace histogram [18, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:44,426 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-12 22:26:44,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:44,610 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:44,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:44,610 INFO L85 PathProgramCache]: Analyzing trace with hash -437629153, now seen corresponding path program 7 times [2024-09-12 22:26:44,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:44,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280636034] [2024-09-12 22:26:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:44,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15