./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de20.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 1d5fa637 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-de20.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 cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd --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-1d5fa63-m [2024-09-13 08:48:52,221 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 08:48:52,293 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 08:48:52,297 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 08:48:52,298 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 08:48:52,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 08:48:52,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 08:48:52,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 08:48:52,334 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 08:48:52,336 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 08:48:52,336 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 08:48:52,336 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 08:48:52,337 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 08:48:52,337 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 08:48:52,338 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 08:48:52,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 08:48:52,340 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 08:48:52,340 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 08:48:52,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 08:48:52,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 08:48:52,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 08:48:52,345 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 08:48:52,346 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 08:48:52,346 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 08:48:52,346 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 08:48:52,346 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 08:48:52,346 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 08:48:52,347 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 08:48:52,347 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 08:48:52,347 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 08:48:52,348 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 08:48:52,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 08:48:52,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:48:52,348 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 08:48:52,349 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 08:48:52,349 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 08:48:52,349 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 08:48:52,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 08:48:52,351 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 08:48:52,352 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 08:48:52,352 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 08:48:52,352 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 08:48:52,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 08:48:52,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 08:48:52,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 08:48:52,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 08:48:52,622 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 08:48:52,622 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 08:48:52,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de20.c [2024-09-13 08:48:54,061 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 08:48:54,228 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 08:48:54,229 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de20.c [2024-09-13 08:48:54,235 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/d87683a77/d730ccd615a74d3fa127d423506c90cf/FLAG215a4c491 [2024-09-13 08:48:54,247 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/d87683a77/d730ccd615a74d3fa127d423506c90cf [2024-09-13 08:48:54,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 08:48:54,250 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 08:48:54,252 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 08:48:54,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 08:48:54,258 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 08:48:54,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf98552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54, skipping insertion in model container [2024-09-13 08:48:54,260 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,275 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 08:48:54,434 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-de20.c[368,381] [2024-09-13 08:48:54,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:48:54,469 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 08:48:54,479 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-de20.c[368,381] [2024-09-13 08:48:54,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:48:54,498 INFO L204 MainTranslator]: Completed translation [2024-09-13 08:48:54,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54 WrapperNode [2024-09-13 08:48:54,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 08:48:54,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 08:48:54,500 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 08:48:54,500 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 08:48:54,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,514 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,519 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 08:48:54,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 08:48:54,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 08:48:54,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 08:48:54,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 08:48:54,530 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,531 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,541 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]. [2024-09-13 08:48:54,541 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,544 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,547 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,548 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 08:48:54,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 08:48:54,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 08:48:54,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 08:48:54,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (1/1) ... [2024-09-13 08:48:54,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:48:54,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:48:54,590 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) [2024-09-13 08:48:54,594 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 [2024-09-13 08:48:54,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 08:48:54,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 08:48:54,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 08:48:54,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 08:48:54,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 08:48:54,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 08:48:54,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 08:48:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 08:48:54,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 08:48:54,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 08:48:54,709 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 08:48:54,711 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 08:48:54,871 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-13 08:48:54,871 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 08:48:54,899 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 08:48:54,900 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 08:48:54,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:48:54 BoogieIcfgContainer [2024-09-13 08:48:54,901 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 08:48:54,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 08:48:54,904 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 08:48:54,908 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 08:48:54,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 08:48:54" (1/3) ... [2024-09-13 08:48:54,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdb1997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:48:54, skipping insertion in model container [2024-09-13 08:48:54,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:48:54" (2/3) ... [2024-09-13 08:48:54,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdb1997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:48:54, skipping insertion in model container [2024-09-13 08:48:54,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:48:54" (3/3) ... [2024-09-13 08:48:54,911 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de20.c [2024-09-13 08:48:54,970 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 08:48:54,971 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 08:48:55,076 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 08:48:55,083 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;@5952beda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 08:48:55,083 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 08:48:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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) [2024-09-13 08:48:55,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-13 08:48:55,094 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:55,094 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:55,095 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:48:55,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:55,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2046341363, now seen corresponding path program 1 times [2024-09-13 08:48:55,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:48:55,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531061462] [2024-09-13 08:48:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:55,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:48:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:55,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:48:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:55,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:48:55,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531061462] [2024-09-13 08:48:55,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531061462] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:48:55,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:48:55,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 08:48:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014140498] [2024-09-13 08:48:55,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:48:55,290 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 08:48:55,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:48:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 08:48:55,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 08:48:55,315 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-09-13 08:48:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:48:55,340 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-09-13 08:48:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 08:48:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2024-09-13 08:48:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:48:55,348 INFO L225 Difference]: With dead ends: 32 [2024-09-13 08:48:55,348 INFO L226 Difference]: Without dead ends: 13 [2024-09-13 08:48:55,352 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 [2024-09-13 08:48:55,355 INFO L434 NwaCegarLoop]: 18 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, 18 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 [2024-09-13 08:48:55,358 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:48:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-13 08:48:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-13 08:48:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2024-09-13 08:48:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-09-13 08:48:55,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2024-09-13 08:48:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:48:55,385 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-09-13 08:48:55,386 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-09-13 08:48:55,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-09-13 08:48:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-13 08:48:55,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:55,388 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:55,388 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 08:48:55,388 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:48:55,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1301388791, now seen corresponding path program 1 times [2024-09-13 08:48:55,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:48:55,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652233095] [2024-09-13 08:48:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:48:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:55,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:48:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:55,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:48:55,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652233095] [2024-09-13 08:48:55,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652233095] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:48:55,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:48:55,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:48:55,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998026490] [2024-09-13 08:48:55,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:48:55,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:48:55,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:48:55,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:48:55,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:48:55,806 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-09-13 08:48:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:48:55,857 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-09-13 08:48:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:48:55,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2024-09-13 08:48:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:48:55,859 INFO L225 Difference]: With dead ends: 21 [2024-09-13 08:48:55,859 INFO L226 Difference]: Without dead ends: 16 [2024-09-13 08:48:55,859 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 [2024-09-13 08:48:55,861 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:48:55,861 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:48:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-13 08:48:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-13 08:48:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2024-09-13 08:48:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-13 08:48:55,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2024-09-13 08:48:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:48:55,872 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-13 08:48:55,872 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-09-13 08:48:55,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-13 08:48:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 08:48:55,873 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:55,874 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:55,874 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 08:48:55,874 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:48:55,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1652809100, now seen corresponding path program 1 times [2024-09-13 08:48:55,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:48:55,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534225450] [2024-09-13 08:48:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:55,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:48:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:55,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:48:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:55,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:48:55,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534225450] [2024-09-13 08:48:55,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534225450] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:48:55,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:48:55,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 08:48:55,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579878643] [2024-09-13 08:48:55,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:48:55,965 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 08:48:55,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:48:55,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 08:48:55,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 08:48:55,967 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-09-13 08:48:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:48:55,983 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-09-13 08:48:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 08:48:55,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2024-09-13 08:48:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:48:55,984 INFO L225 Difference]: With dead ends: 22 [2024-09-13 08:48:55,984 INFO L226 Difference]: Without dead ends: 14 [2024-09-13 08:48:55,984 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 08:48:55,986 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:48:55,986 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:48:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-13 08:48:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-13 08:48:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2024-09-13 08:48:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-13 08:48:55,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2024-09-13 08:48:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:48:55,991 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-13 08:48:55,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-09-13 08:48:55,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-13 08:48:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 08:48:55,992 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:55,992 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:55,992 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 08:48:55,992 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:48:55,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash 545094421, now seen corresponding path program 1 times [2024-09-13 08:48:55,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:48:55,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153907041] [2024-09-13 08:48:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:55,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:48:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:56,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:48:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:56,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:48:56,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153907041] [2024-09-13 08:48:56,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153907041] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:48:56,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467201304] [2024-09-13 08:48:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:56,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:48:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:48:56,120 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) [2024-09-13 08:48:56,121 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 08:48:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:56,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 08:48:56,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:48:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:56,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:48:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:56,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467201304] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:48:56,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:48:56,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-13 08:48:56,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314221564] [2024-09-13 08:48:56,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:48:56,292 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 08:48:56,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:48:56,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 08:48:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-13 08:48:56,296 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2024-09-13 08:48:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:48:56,373 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-09-13 08:48:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 08:48:56,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 13 [2024-09-13 08:48:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:48:56,377 INFO L225 Difference]: With dead ends: 27 [2024-09-13 08:48:56,377 INFO L226 Difference]: Without dead ends: 22 [2024-09-13 08:48:56,379 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:48:56,380 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:48:56,381 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:48:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-13 08:48:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2024-09-13 08:48:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2024-09-13 08:48:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-09-13 08:48:56,392 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2024-09-13 08:48:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:48:56,393 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-09-13 08:48:56,393 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2024-09-13 08:48:56,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-09-13 08:48:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-13 08:48:56,395 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:56,396 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:56,411 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 08:48:56,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:48:56,597 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:48:56,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash -246404376, now seen corresponding path program 1 times [2024-09-13 08:48:56,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:48:56,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881760894] [2024-09-13 08:48:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:48:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:56,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:48:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:56,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:48:56,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881760894] [2024-09-13 08:48:56,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881760894] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:48:56,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424154113] [2024-09-13 08:48:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:56,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:48:56,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:48:56,895 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) [2024-09-13 08:48:56,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 08:48:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:56,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 08:48:56,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:48:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:57,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:48:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:57,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424154113] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:48:57,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:48:57,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-13 08:48:57,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211120546] [2024-09-13 08:48:57,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:48:57,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 08:48:57,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:48:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 08:48:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-13 08:48:57,092 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:48:57,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:48:57,159 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-13 08:48:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 08:48:57,160 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-13 08:48:57,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:48:57,161 INFO L225 Difference]: With dead ends: 27 [2024-09-13 08:48:57,161 INFO L226 Difference]: Without dead ends: 22 [2024-09-13 08:48:57,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:48:57,162 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:48:57,162 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:48:57,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-13 08:48:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-09-13 08:48:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2024-09-13 08:48:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-09-13 08:48:57,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2024-09-13 08:48:57,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:48:57,174 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-09-13 08:48:57,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:48:57,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-09-13 08:48:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-13 08:48:57,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:57,177 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:57,195 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 08:48:57,377 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:48:57,378 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:48:57,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:57,378 INFO L85 PathProgramCache]: Analyzing trace with hash 986936693, now seen corresponding path program 2 times [2024-09-13 08:48:57,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:48:57,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584410942] [2024-09-13 08:48:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:57,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:48:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:57,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:48:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:57,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:48:57,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584410942] [2024-09-13 08:48:57,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584410942] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:48:57,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24841321] [2024-09-13 08:48:57,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:48:57,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:48:57,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:48:57,472 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) [2024-09-13 08:48:57,474 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 08:48:57,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:48:57,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:48:57,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 08:48:57,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:48:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:57,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:48:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:57,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24841321] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:48:57,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:48:57,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-09-13 08:48:57,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751307471] [2024-09-13 08:48:57,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:48:57,659 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 08:48:57,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:48:57,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 08:48:57,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:48:57,660 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2024-09-13 08:48:57,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:48:57,727 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-09-13 08:48:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 08:48:57,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 15 [2024-09-13 08:48:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:48:57,728 INFO L225 Difference]: With dead ends: 32 [2024-09-13 08:48:57,728 INFO L226 Difference]: Without dead ends: 23 [2024-09-13 08:48:57,729 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:48:57,729 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:48:57,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:48:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-13 08:48:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-13 08:48:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2024-09-13 08:48:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-09-13 08:48:57,743 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2024-09-13 08:48:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:48:57,744 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-09-13 08:48:57,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2024-09-13 08:48:57,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-09-13 08:48:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-13 08:48:57,745 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:57,745 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:57,763 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 08:48:57,945 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 08:48:57,946 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:48:57,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:57,946 INFO L85 PathProgramCache]: Analyzing trace with hash -372821783, now seen corresponding path program 3 times [2024-09-13 08:48:57,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:48:57,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863939803] [2024-09-13 08:48:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:57,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:48:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:58,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:48:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:58,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:48:58,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863939803] [2024-09-13 08:48:58,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863939803] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:48:58,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754698612] [2024-09-13 08:48:58,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:48:58,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:48:58,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:48:58,164 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) [2024-09-13 08:48:58,165 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 08:48:58,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 08:48:58,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:48:58,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 08:48:58,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:48:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:58,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:48:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:58,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754698612] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:48:58,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:48:58,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-09-13 08:48:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449003257] [2024-09-13 08:48:58,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:48:58,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 08:48:58,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:48:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 08:48:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:48:58,361 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:48:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:48:58,458 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-09-13 08:48:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 08:48:58,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-13 08:48:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:48:58,459 INFO L225 Difference]: With dead ends: 30 [2024-09-13 08:48:58,459 INFO L226 Difference]: Without dead ends: 25 [2024-09-13 08:48:58,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-09-13 08:48:58,460 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:48:58,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:48:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-13 08:48:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-13 08:48:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2024-09-13 08:48:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-09-13 08:48:58,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2024-09-13 08:48:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:48:58,475 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-09-13 08:48:58,475 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:48:58,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-09-13 08:48:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-13 08:48:58,478 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:58,478 INFO L216 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:58,495 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 08:48:58,678 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:48:58,679 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:48:58,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash -957289368, now seen corresponding path program 4 times [2024-09-13 08:48:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:48:58,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996247090] [2024-09-13 08:48:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:58,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:48:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:58,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:48:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:58,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:48:58,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996247090] [2024-09-13 08:48:58,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996247090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:48:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413667480] [2024-09-13 08:48:58,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:48:58,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:48:58,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:48:58,804 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) [2024-09-13 08:48:58,806 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 08:48:58,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:48:58,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:48:58,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 08:48:58,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:48:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:58,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:48:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:58,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413667480] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:48:58,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:48:58,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-13 08:48:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694323302] [2024-09-13 08:48:58,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:48:58,975 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 08:48:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:48:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 08:48:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:48:58,976 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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) [2024-09-13 08:48:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:48:59,140 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-09-13 08:48:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 08:48:59,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 [2024-09-13 08:48:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:48:59,141 INFO L225 Difference]: With dead ends: 41 [2024-09-13 08:48:59,141 INFO L226 Difference]: Without dead ends: 36 [2024-09-13 08:48:59,142 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-09-13 08:48:59,142 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:48:59,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:48:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-13 08:48:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2024-09-13 08:48:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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) [2024-09-13 08:48:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-09-13 08:48:59,155 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2024-09-13 08:48:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:48:59,156 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-09-13 08:48:59,156 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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) [2024-09-13 08:48:59,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-09-13 08:48:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 08:48:59,157 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:59,157 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:59,174 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 08:48:59,361 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-13 08:48:59,362 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:48:59,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1362964372, now seen corresponding path program 5 times [2024-09-13 08:48:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:48:59,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922276438] [2024-09-13 08:48:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:48:59,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:48:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:59,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:48:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:48:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:59,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:48:59,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922276438] [2024-09-13 08:48:59,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922276438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:48:59,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998378104] [2024-09-13 08:48:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:48:59,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:48:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:48:59,460 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) [2024-09-13 08:48:59,462 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 08:48:59,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-13 08:48:59,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:48:59,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 08:48:59,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:48:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:59,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:48:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:48:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998378104] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:48:59,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:48:59,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2024-09-13 08:48:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16261350] [2024-09-13 08:48:59,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:48:59,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 08:48:59,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:48:59,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 08:48:59,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-13 08:48:59,696 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2024-09-13 08:48:59,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:48:59,881 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2024-09-13 08:48:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 08:48:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 17 [2024-09-13 08:48:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:48:59,884 INFO L225 Difference]: With dead ends: 49 [2024-09-13 08:48:59,884 INFO L226 Difference]: Without dead ends: 39 [2024-09-13 08:48:59,885 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:48:59,885 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:48:59,886 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 110 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:48:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-13 08:48:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-09-13 08:48:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2024-09-13 08:48:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-13 08:48:59,900 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 17 [2024-09-13 08:48:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:48:59,900 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-13 08:48:59,900 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2024-09-13 08:48:59,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:48:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-13 08:48:59,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 08:48:59,904 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:48:59,904 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:48:59,921 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 08:49:00,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:00,109 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:00,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 305126920, now seen corresponding path program 6 times [2024-09-13 08:49:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616961034] [2024-09-13 08:49:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:00,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:00,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:00,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616961034] [2024-09-13 08:49:00,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616961034] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:00,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419760858] [2024-09-13 08:49:00,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:00,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:00,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:00,353 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) [2024-09-13 08:49:00,355 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 08:49:00,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-13 08:49:00,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:00,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-13 08:49:00,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:00,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:00,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419760858] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:00,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:00,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-09-13 08:49:00,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480326131] [2024-09-13 08:49:00,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:00,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 08:49:00,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:00,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 08:49:00,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:49:00,563 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:00,661 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2024-09-13 08:49:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 08:49:00,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-13 08:49:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:00,662 INFO L225 Difference]: With dead ends: 42 [2024-09-13 08:49:00,662 INFO L226 Difference]: Without dead ends: 37 [2024-09-13 08:49:00,663 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-09-13 08:49:00,663 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:00,663 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-13 08:49:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2024-09-13 08:49:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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) [2024-09-13 08:49:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-13 08:49:00,673 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 18 [2024-09-13 08:49:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:00,673 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-13 08:49:00,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:00,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-13 08:49:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-13 08:49:00,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:00,674 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:00,691 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:00,875 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:00,876 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:00,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash 904537685, now seen corresponding path program 7 times [2024-09-13 08:49:00,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:00,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089348540] [2024-09-13 08:49:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:00,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:00,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:00,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:00,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089348540] [2024-09-13 08:49:00,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089348540] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:00,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684065953] [2024-09-13 08:49:00,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:00,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:00,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:00,987 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) [2024-09-13 08:49:00,988 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 08:49:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:01,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 08:49:01,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:01,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:01,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684065953] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:01,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:01,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-09-13 08:49:01,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339642339] [2024-09-13 08:49:01,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:01,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 08:49:01,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 08:49:01,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:49:01,280 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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) [2024-09-13 08:49:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:01,653 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2024-09-13 08:49:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 08:49:01,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 [2024-09-13 08:49:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:01,656 INFO L225 Difference]: With dead ends: 53 [2024-09-13 08:49:01,656 INFO L226 Difference]: Without dead ends: 42 [2024-09-13 08:49:01,657 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:49:01,657 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:01,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 127 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-13 08:49:01,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2024-09-13 08:49:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2024-09-13 08:49:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-09-13 08:49:01,674 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 19 [2024-09-13 08:49:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:01,674 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-09-13 08:49:01,674 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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) [2024-09-13 08:49:01,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-09-13 08:49:01,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-13 08:49:01,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:01,676 INFO L216 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:01,694 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 08:49:01,877 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:01,878 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:01,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:01,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1748253035, now seen corresponding path program 2 times [2024-09-13 08:49:01,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:01,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739575873] [2024-09-13 08:49:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:01,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:01,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:01,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:01,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739575873] [2024-09-13 08:49:01,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739575873] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:01,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630734927] [2024-09-13 08:49:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:01,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:01,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:01,996 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) [2024-09-13 08:49:01,998 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 08:49:02,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:02,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:02,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 08:49:02,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:02,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630734927] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:02,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:02,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-13 08:49:02,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410827250] [2024-09-13 08:49:02,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:02,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:49:02,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:49:02,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:49:02,260 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2024-09-13 08:49:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:02,725 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2024-09-13 08:49:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 08:49:02,725 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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 [2024-09-13 08:49:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:02,727 INFO L225 Difference]: With dead ends: 60 [2024-09-13 08:49:02,727 INFO L226 Difference]: Without dead ends: 55 [2024-09-13 08:49:02,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2024-09-13 08:49:02,729 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:02,730 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 146 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-13 08:49:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2024-09-13 08:49:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 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) [2024-09-13 08:49:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2024-09-13 08:49:02,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 19 [2024-09-13 08:49:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:02,746 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2024-09-13 08:49:02,746 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2024-09-13 08:49:02,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2024-09-13 08:49:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 08:49:02,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:02,748 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:02,765 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 08:49:02,951 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-13 08:49:02,952 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:02,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:02,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2064971831, now seen corresponding path program 8 times [2024-09-13 08:49:02,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:02,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878544197] [2024-09-13 08:49:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:02,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:03,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:03,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878544197] [2024-09-13 08:49:03,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878544197] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:03,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536755889] [2024-09-13 08:49:03,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:03,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:03,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:03,160 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) [2024-09-13 08:49:03,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 08:49:03,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:03,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:03,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 08:49:03,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:03,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:03,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536755889] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:03,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:03,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2024-09-13 08:49:03,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429328065] [2024-09-13 08:49:03,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:03,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 08:49:03,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:03,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 08:49:03,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:49:03,386 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:03,494 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-09-13 08:49:03,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 08:49:03,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-13 08:49:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:03,495 INFO L225 Difference]: With dead ends: 56 [2024-09-13 08:49:03,495 INFO L226 Difference]: Without dead ends: 51 [2024-09-13 08:49:03,496 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:49:03,496 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:03,497 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-13 08:49:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-09-13 08:49:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 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) [2024-09-13 08:49:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2024-09-13 08:49:03,509 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 20 [2024-09-13 08:49:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:03,509 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2024-09-13 08:49:03,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:03,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2024-09-13 08:49:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 08:49:03,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:03,510 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:03,527 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 08:49:03,710 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 08:49:03,711 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:03,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2036231191, now seen corresponding path program 9 times [2024-09-13 08:49:03,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:03,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573261092] [2024-09-13 08:49:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:03,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:03,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:03,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573261092] [2024-09-13 08:49:03,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573261092] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:03,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252434576] [2024-09-13 08:49:03,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:03,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:03,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:03,842 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) [2024-09-13 08:49:03,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 08:49:03,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 08:49:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:03,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 08:49:03,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:03,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:04,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252434576] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:04,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:04,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2024-09-13 08:49:04,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953520106] [2024-09-13 08:49:04,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:04,133 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 08:49:04,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:04,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 08:49:04,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-09-13 08:49:04,134 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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) [2024-09-13 08:49:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:04,623 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2024-09-13 08:49:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 08:49:04,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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 [2024-09-13 08:49:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:04,625 INFO L225 Difference]: With dead ends: 70 [2024-09-13 08:49:04,625 INFO L226 Difference]: Without dead ends: 65 [2024-09-13 08:49:04,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:49:04,626 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:04,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 157 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-13 08:49:04,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2024-09-13 08:49:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 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) [2024-09-13 08:49:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2024-09-13 08:49:04,638 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 20 [2024-09-13 08:49:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:04,638 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2024-09-13 08:49:04,638 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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) [2024-09-13 08:49:04,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:04,638 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2024-09-13 08:49:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-13 08:49:04,639 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:04,639 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:04,655 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:04,843 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 08:49:04,844 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:04,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash 445920436, now seen corresponding path program 10 times [2024-09-13 08:49:04,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:04,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164208011] [2024-09-13 08:49:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:04,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:04,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:04,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164208011] [2024-09-13 08:49:04,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164208011] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:04,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861246583] [2024-09-13 08:49:04,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:04,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:04,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:04,969 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) [2024-09-13 08:49:04,970 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 08:49:05,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:05,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:05,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-13 08:49:05,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:05,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:05,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861246583] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:05,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:05,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2024-09-13 08:49:05,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501611339] [2024-09-13 08:49:05,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:05,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:49:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:49:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:49:05,256 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 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) [2024-09-13 08:49:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:05,805 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-09-13 08:49:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 08:49:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 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 [2024-09-13 08:49:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:05,807 INFO L225 Difference]: With dead ends: 76 [2024-09-13 08:49:05,807 INFO L226 Difference]: Without dead ends: 64 [2024-09-13 08:49:05,809 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:49:05,810 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:05,810 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-13 08:49:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2024-09-13 08:49:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 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) [2024-09-13 08:49:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-09-13 08:49:05,826 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 21 [2024-09-13 08:49:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:05,827 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-09-13 08:49:05,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 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) [2024-09-13 08:49:05,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-09-13 08:49:05,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 08:49:05,828 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:05,828 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:05,845 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 08:49:06,032 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 08:49:06,033 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:06,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:06,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1394439896, now seen corresponding path program 11 times [2024-09-13 08:49:06,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:06,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115935260] [2024-09-13 08:49:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:06,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:06,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:06,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:06,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115935260] [2024-09-13 08:49:06,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115935260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:06,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058298733] [2024-09-13 08:49:06,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:06,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:06,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:06,238 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) [2024-09-13 08:49:06,240 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 08:49:06,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 08:49:06,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:06,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-13 08:49:06,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:06,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:06,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058298733] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:06,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:06,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2024-09-13 08:49:06,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410563238] [2024-09-13 08:49:06,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:06,487 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 08:49:06,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 08:49:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2024-09-13 08:49:06,488 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:06,601 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-09-13 08:49:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 08:49:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-13 08:49:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:06,602 INFO L225 Difference]: With dead ends: 63 [2024-09-13 08:49:06,602 INFO L226 Difference]: Without dead ends: 58 [2024-09-13 08:49:06,602 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:49:06,602 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:06,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-13 08:49:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2024-09-13 08:49:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 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) [2024-09-13 08:49:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-09-13 08:49:06,619 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 22 [2024-09-13 08:49:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:06,620 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-09-13 08:49:06,620 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:06,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-09-13 08:49:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-13 08:49:06,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:06,621 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:06,638 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:06,822 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 08:49:06,822 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:06,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:06,823 INFO L85 PathProgramCache]: Analyzing trace with hash -242426059, now seen corresponding path program 12 times [2024-09-13 08:49:06,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:06,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608643077] [2024-09-13 08:49:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:06,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:06,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:06,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608643077] [2024-09-13 08:49:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608643077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128725016] [2024-09-13 08:49:06,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:06,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:06,995 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) [2024-09-13 08:49:06,998 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 08:49:07,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:49:07,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:07,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-13 08:49:07,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:07,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:07,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128725016] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:07,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:07,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2024-09-13 08:49:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55439916] [2024-09-13 08:49:07,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:07,330 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 08:49:07,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 08:49:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-09-13 08:49:07,331 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2024-09-13 08:49:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:08,112 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2024-09-13 08:49:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-13 08:49:08,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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 [2024-09-13 08:49:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:08,113 INFO L225 Difference]: With dead ends: 90 [2024-09-13 08:49:08,113 INFO L226 Difference]: Without dead ends: 77 [2024-09-13 08:49:08,114 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=400, Invalid=2150, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 08:49:08,114 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:08,114 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 150 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-13 08:49:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2024-09-13 08:49:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 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) [2024-09-13 08:49:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2024-09-13 08:49:08,130 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 23 [2024-09-13 08:49:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:08,130 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2024-09-13 08:49:08,130 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2024-09-13 08:49:08,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2024-09-13 08:49:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-13 08:49:08,131 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:08,131 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:08,147 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 08:49:08,331 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 08:49:08,332 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:08,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 697820841, now seen corresponding path program 13 times [2024-09-13 08:49:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:08,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298129295] [2024-09-13 08:49:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:08,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:08,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:08,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:08,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298129295] [2024-09-13 08:49:08,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298129295] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:08,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589621499] [2024-09-13 08:49:08,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:08,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:08,568 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) [2024-09-13 08:49:08,570 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 08:49:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:08,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 08:49:08,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:08,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:08,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589621499] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:08,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:08,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2024-09-13 08:49:08,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900006867] [2024-09-13 08:49:08,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:08,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:49:08,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:08,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:49:08,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:49:08,854 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:09,026 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-09-13 08:49:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 08:49:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-13 08:49:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:09,028 INFO L225 Difference]: With dead ends: 72 [2024-09-13 08:49:09,028 INFO L226 Difference]: Without dead ends: 67 [2024-09-13 08:49:09,028 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-09-13 08:49:09,028 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:09,029 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 137 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-13 08:49:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2024-09-13 08:49:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 states have internal predecessors, (72), 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) [2024-09-13 08:49:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2024-09-13 08:49:09,047 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 24 [2024-09-13 08:49:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:09,048 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2024-09-13 08:49:09,048 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:09,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2024-09-13 08:49:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-13 08:49:09,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:09,049 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:09,061 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-13 08:49:09,249 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-13 08:49:09,249 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:09,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:09,250 INFO L85 PathProgramCache]: Analyzing trace with hash -779828600, now seen corresponding path program 14 times [2024-09-13 08:49:09,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:09,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825893888] [2024-09-13 08:49:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:09,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:09,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:09,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825893888] [2024-09-13 08:49:09,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825893888] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:09,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155975882] [2024-09-13 08:49:09,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:09,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:09,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:09,437 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) [2024-09-13 08:49:09,438 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 08:49:09,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:09,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:09,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 08:49:09,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:09,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:09,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155975882] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:09,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:09,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2024-09-13 08:49:09,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523031631] [2024-09-13 08:49:09,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:09,843 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-13 08:49:09,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:09,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-13 08:49:09,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2024-09-13 08:49:09,844 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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) [2024-09-13 08:49:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:10,800 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2024-09-13 08:49:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-13 08:49:10,800 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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 24 [2024-09-13 08:49:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:10,801 INFO L225 Difference]: With dead ends: 103 [2024-09-13 08:49:10,801 INFO L226 Difference]: Without dead ends: 98 [2024-09-13 08:49:10,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=411, Invalid=1659, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:49:10,802 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:10,803 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 202 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-13 08:49:10,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2024-09-13 08:49:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 states have internal predecessors, (80), 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) [2024-09-13 08:49:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2024-09-13 08:49:10,817 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 24 [2024-09-13 08:49:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:10,817 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2024-09-13 08:49:10,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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) [2024-09-13 08:49:10,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2024-09-13 08:49:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-13 08:49:10,818 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:10,818 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:10,830 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-13 08:49:11,018 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:11,019 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:11,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash 193147348, now seen corresponding path program 15 times [2024-09-13 08:49:11,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:11,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459491570] [2024-09-13 08:49:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:11,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:11,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:11,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:11,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459491570] [2024-09-13 08:49:11,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459491570] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:11,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813169329] [2024-09-13 08:49:11,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:11,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:11,239 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) [2024-09-13 08:49:11,241 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 08:49:11,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 08:49:11,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:11,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-13 08:49:11,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:11,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:11,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813169329] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:11,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:11,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 32 [2024-09-13 08:49:11,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724171519] [2024-09-13 08:49:11,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:11,683 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 08:49:11,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:11,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 08:49:11,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:49:11,684 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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) [2024-09-13 08:49:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:12,918 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2024-09-13 08:49:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-13 08:49:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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 25 [2024-09-13 08:49:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:12,919 INFO L225 Difference]: With dead ends: 111 [2024-09-13 08:49:12,919 INFO L226 Difference]: Without dead ends: 97 [2024-09-13 08:49:12,921 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=600, Invalid=3306, Unknown=0, NotChecked=0, Total=3906 [2024-09-13 08:49:12,921 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:12,921 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-13 08:49:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2024-09-13 08:49:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 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) [2024-09-13 08:49:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2024-09-13 08:49:12,940 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 25 [2024-09-13 08:49:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:12,940 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2024-09-13 08:49:12,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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) [2024-09-13 08:49:12,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2024-09-13 08:49:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-13 08:49:12,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:12,941 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:12,954 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:13,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:13,142 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:13,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1827286088, now seen corresponding path program 16 times [2024-09-13 08:49:13,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:13,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178414822] [2024-09-13 08:49:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:13,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:13,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:13,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:13,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178414822] [2024-09-13 08:49:13,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178414822] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:13,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672748304] [2024-09-13 08:49:13,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:13,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:13,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:13,936 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) [2024-09-13 08:49:13,938 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 08:49:13,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:13,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:13,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-13 08:49:13,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:14,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:14,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672748304] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:14,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:14,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 37 [2024-09-13 08:49:14,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003541346] [2024-09-13 08:49:14,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:14,555 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-13 08:49:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-13 08:49:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 08:49:14,556 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 35 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:14,959 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2024-09-13 08:49:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 08:49:14,959 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 35 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-13 08:49:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:14,960 INFO L225 Difference]: With dead ends: 81 [2024-09-13 08:49:14,960 INFO L226 Difference]: Without dead ends: 76 [2024-09-13 08:49:14,961 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:49:14,961 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:14,961 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:49:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-13 08:49:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2024-09-13 08:49:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 62 states have internal predecessors, (83), 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) [2024-09-13 08:49:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2024-09-13 08:49:14,985 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 26 [2024-09-13 08:49:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:14,985 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2024-09-13 08:49:14,985 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 35 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:14,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2024-09-13 08:49:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-13 08:49:14,986 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:14,986 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:14,999 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:15,186 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-13 08:49:15,187 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:15,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash 846831637, now seen corresponding path program 17 times [2024-09-13 08:49:15,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:15,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015694314] [2024-09-13 08:49:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:15,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:15,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:15,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:15,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015694314] [2024-09-13 08:49:15,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015694314] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:15,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496355262] [2024-09-13 08:49:15,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:15,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:15,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:15,438 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) [2024-09-13 08:49:15,440 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 08:49:15,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-13 08:49:15,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:15,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 08:49:15,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:15,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:16,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496355262] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:16,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:16,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2024-09-13 08:49:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201293602] [2024-09-13 08:49:16,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:16,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 08:49:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:16,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 08:49:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:49:16,016 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 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) [2024-09-13 08:49:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:17,827 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2024-09-13 08:49:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-13 08:49:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 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 [2024-09-13 08:49:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:17,828 INFO L225 Difference]: With dead ends: 124 [2024-09-13 08:49:17,828 INFO L226 Difference]: Without dead ends: 109 [2024-09-13 08:49:17,829 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=864, Invalid=4836, Unknown=0, NotChecked=0, Total=5700 [2024-09-13 08:49:17,830 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:17,830 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 195 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:17,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-13 08:49:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2024-09-13 08:49:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 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) [2024-09-13 08:49:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-13 08:49:17,859 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 27 [2024-09-13 08:49:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:17,860 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-13 08:49:17,860 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 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) [2024-09-13 08:49:17,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-13 08:49:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-13 08:49:17,860 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:17,860 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:17,874 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:18,061 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 08:49:18,061 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:18,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:18,061 INFO L85 PathProgramCache]: Analyzing trace with hash -703869559, now seen corresponding path program 18 times [2024-09-13 08:49:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:18,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458635966] [2024-09-13 08:49:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:18,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:18,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458635966] [2024-09-13 08:49:18,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458635966] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:18,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120826985] [2024-09-13 08:49:18,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:18,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:18,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:18,929 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) [2024-09-13 08:49:18,931 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 08:49:18,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 08:49:18,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:18,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-13 08:49:18,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:19,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:19,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120826985] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:19,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:19,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 13] total 41 [2024-09-13 08:49:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774813826] [2024-09-13 08:49:19,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:19,752 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-13 08:49:19,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-13 08:49:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 08:49:19,754 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:20,237 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2024-09-13 08:49:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 08:49:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-13 08:49:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:20,239 INFO L225 Difference]: With dead ends: 92 [2024-09-13 08:49:20,239 INFO L226 Difference]: Without dead ends: 87 [2024-09-13 08:49:20,239 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=1584, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:49:20,240 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:20,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:49:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-13 08:49:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2024-09-13 08:49:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 states have internal predecessors, (96), 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) [2024-09-13 08:49:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2024-09-13 08:49:20,290 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2024-09-13 08:49:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:20,290 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2024-09-13 08:49:20,291 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:20,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2024-09-13 08:49:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-13 08:49:20,295 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:20,295 INFO L216 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:20,311 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:20,496 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-13 08:49:20,496 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:20,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash 832785865, now seen corresponding path program 19 times [2024-09-13 08:49:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:20,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16839332] [2024-09-13 08:49:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:20,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:20,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16839332] [2024-09-13 08:49:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16839332] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015503866] [2024-09-13 08:49:20,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:20,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:20,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:20,759 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) [2024-09-13 08:49:20,760 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 08:49:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:20,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-13 08:49:20,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:20,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:21,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015503866] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:21,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:21,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2024-09-13 08:49:21,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668175699] [2024-09-13 08:49:21,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:21,247 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-13 08:49:21,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-13 08:49:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1208, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 08:49:21,248 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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) [2024-09-13 08:49:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:23,235 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2024-09-13 08:49:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 08:49:23,236 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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 28 [2024-09-13 08:49:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:23,236 INFO L225 Difference]: With dead ends: 146 [2024-09-13 08:49:23,236 INFO L226 Difference]: Without dead ends: 141 [2024-09-13 08:49:23,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=691, Invalid=2969, Unknown=0, NotChecked=0, Total=3660 [2024-09-13 08:49:23,238 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:23,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 283 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:23,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-13 08:49:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2024-09-13 08:49:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 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) [2024-09-13 08:49:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 113 transitions. [2024-09-13 08:49:23,272 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 113 transitions. Word has length 28 [2024-09-13 08:49:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:23,272 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 113 transitions. [2024-09-13 08:49:23,272 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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) [2024-09-13 08:49:23,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 113 transitions. [2024-09-13 08:49:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 08:49:23,273 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:23,273 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:23,287 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-13 08:49:23,473 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-13 08:49:23,474 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:23,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash -309582092, now seen corresponding path program 20 times [2024-09-13 08:49:23,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:23,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791404867] [2024-09-13 08:49:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:23,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:23,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:23,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:23,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791404867] [2024-09-13 08:49:23,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791404867] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:23,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378032383] [2024-09-13 08:49:23,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:23,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:23,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:23,749 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) [2024-09-13 08:49:23,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 08:49:23,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:23,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:23,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 08:49:23,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:23,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:24,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378032383] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:24,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:24,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 40 [2024-09-13 08:49:24,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070736943] [2024-09-13 08:49:24,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:24,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 08:49:24,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 08:49:24,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:49:24,344 INFO L87 Difference]: Start difference. First operand 84 states and 113 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 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) [2024-09-13 08:49:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:27,053 INFO L93 Difference]: Finished difference Result 149 states and 193 transitions. [2024-09-13 08:49:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-13 08:49:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 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 [2024-09-13 08:49:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:27,054 INFO L225 Difference]: With dead ends: 149 [2024-09-13 08:49:27,054 INFO L226 Difference]: Without dead ends: 133 [2024-09-13 08:49:27,056 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1204, Invalid=6806, Unknown=0, NotChecked=0, Total=8010 [2024-09-13 08:49:27,057 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:27,057 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 221 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-13 08:49:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2024-09-13 08:49:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 85 states have internal predecessors, (114), 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) [2024-09-13 08:49:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2024-09-13 08:49:27,102 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 29 [2024-09-13 08:49:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:27,103 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2024-09-13 08:49:27,103 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 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) [2024-09-13 08:49:27,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2024-09-13 08:49:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 08:49:27,103 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:27,104 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:27,118 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-13 08:49:27,304 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 08:49:27,304 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:27,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash -179779736, now seen corresponding path program 21 times [2024-09-13 08:49:27,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:27,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606207220] [2024-09-13 08:49:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:27,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:28,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:28,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:28,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606207220] [2024-09-13 08:49:28,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606207220] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:28,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912124603] [2024-09-13 08:49:28,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:28,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:28,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:28,134 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) [2024-09-13 08:49:28,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 08:49:28,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-13 08:49:28,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:28,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 08:49:28,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:28,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:29,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912124603] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:29,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:29,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 14] total 45 [2024-09-13 08:49:29,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482156518] [2024-09-13 08:49:29,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:29,104 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-13 08:49:29,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-13 08:49:29,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 08:49:29,105 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:29,694 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2024-09-13 08:49:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 08:49:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-13 08:49:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:29,695 INFO L225 Difference]: With dead ends: 105 [2024-09-13 08:49:29,695 INFO L226 Difference]: Without dead ends: 100 [2024-09-13 08:49:29,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=1918, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:49:29,696 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:29,696 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 169 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:49:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-13 08:49:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2024-09-13 08:49:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 84 states have internal predecessors, (113), 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) [2024-09-13 08:49:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2024-09-13 08:49:29,742 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 30 [2024-09-13 08:49:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:29,742 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2024-09-13 08:49:29,742 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2024-09-13 08:49:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 08:49:29,743 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:29,743 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:29,755 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-13 08:49:29,943 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-13 08:49:29,943 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:29,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1242666763, now seen corresponding path program 22 times [2024-09-13 08:49:29,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:29,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109551267] [2024-09-13 08:49:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:29,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:30,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:30,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109551267] [2024-09-13 08:49:30,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109551267] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:30,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496730430] [2024-09-13 08:49:30,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:30,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:30,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:30,270 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) [2024-09-13 08:49:30,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 08:49:30,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:30,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:30,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-13 08:49:30,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:30,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:30,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496730430] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:30,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:30,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2024-09-13 08:49:30,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824464575] [2024-09-13 08:49:30,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:30,974 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:49:30,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:49:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:49:30,975 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 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) [2024-09-13 08:49:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:34,772 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2024-09-13 08:49:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-09-13 08:49:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 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 31 [2024-09-13 08:49:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:34,773 INFO L225 Difference]: With dead ends: 164 [2024-09-13 08:49:34,773 INFO L226 Difference]: Without dead ends: 147 [2024-09-13 08:49:34,776 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1633, Invalid=9287, Unknown=0, NotChecked=0, Total=10920 [2024-09-13 08:49:34,776 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:34,777 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 256 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:49:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-13 08:49:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 102. [2024-09-13 08:49:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 97 states have internal predecessors, (130), 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) [2024-09-13 08:49:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 134 transitions. [2024-09-13 08:49:34,852 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 134 transitions. Word has length 31 [2024-09-13 08:49:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:34,852 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 134 transitions. [2024-09-13 08:49:34,853 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 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) [2024-09-13 08:49:34,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 134 transitions. [2024-09-13 08:49:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 08:49:34,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:34,853 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:34,870 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-13 08:49:35,054 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-13 08:49:35,054 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:35,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:35,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1056654231, now seen corresponding path program 23 times [2024-09-13 08:49:35,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:35,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349076496] [2024-09-13 08:49:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:35,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:36,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:36,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349076496] [2024-09-13 08:49:36,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349076496] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281661523] [2024-09-13 08:49:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:36,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:36,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:36,010 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) [2024-09-13 08:49:36,011 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-13 08:49:36,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 08:49:36,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:36,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-13 08:49:36,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:36,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:37,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281661523] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:37,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:37,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 15] total 49 [2024-09-13 08:49:37,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013353123] [2024-09-13 08:49:37,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:37,173 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-13 08:49:37,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-13 08:49:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2192, Unknown=0, NotChecked=0, Total=2352 [2024-09-13 08:49:37,175 INFO L87 Difference]: Start difference. First operand 102 states and 134 transitions. Second operand has 49 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 47 states have internal predecessors, (77), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:37,859 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2024-09-13 08:49:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 08:49:37,860 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 47 states have internal predecessors, (77), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-13 08:49:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:37,861 INFO L225 Difference]: With dead ends: 118 [2024-09-13 08:49:37,861 INFO L226 Difference]: Without dead ends: 113 [2024-09-13 08:49:37,862 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:49:37,862 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:37,862 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 233 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:49:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-13 08:49:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2024-09-13 08:49:37,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.34375) internal successors, (129), 96 states have internal predecessors, (129), 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) [2024-09-13 08:49:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2024-09-13 08:49:37,930 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 32 [2024-09-13 08:49:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:37,930 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2024-09-13 08:49:37,930 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 47 states have internal predecessors, (77), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:37,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2024-09-13 08:49:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 08:49:37,931 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:37,931 INFO L216 NwaCegarLoop]: trace histogram [15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:37,945 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-13 08:49:38,131 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-13 08:49:38,132 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:38,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash 126816424, now seen corresponding path program 24 times [2024-09-13 08:49:38,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:38,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203789949] [2024-09-13 08:49:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:38,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:38,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:38,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:38,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203789949] [2024-09-13 08:49:38,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203789949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:38,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524300500] [2024-09-13 08:49:38,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:38,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:38,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:38,442 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) [2024-09-13 08:49:38,443 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-13 08:49:38,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-13 08:49:38,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:38,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-13 08:49:38,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:38,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:39,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524300500] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:39,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:39,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2024-09-13 08:49:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592443185] [2024-09-13 08:49:39,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:39,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 08:49:39,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 08:49:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1773, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 08:49:39,230 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 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) [2024-09-13 08:49:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:43,545 INFO L93 Difference]: Finished difference Result 197 states and 265 transitions. [2024-09-13 08:49:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-13 08:49:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 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 [2024-09-13 08:49:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:43,546 INFO L225 Difference]: With dead ends: 197 [2024-09-13 08:49:43,546 INFO L226 Difference]: Without dead ends: 192 [2024-09-13 08:49:43,547 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1059, Invalid=4793, Unknown=0, NotChecked=0, Total=5852 [2024-09-13 08:49:43,548 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:43,548 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 364 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:49:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-09-13 08:49:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 108. [2024-09-13 08:49:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 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) [2024-09-13 08:49:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 146 transitions. [2024-09-13 08:49:43,625 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 146 transitions. Word has length 32 [2024-09-13 08:49:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:43,625 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 146 transitions. [2024-09-13 08:49:43,625 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 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) [2024-09-13 08:49:43,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 146 transitions. [2024-09-13 08:49:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 08:49:43,626 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:43,626 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:43,638 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:43,826 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:43,826 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:43,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:43,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1638994964, now seen corresponding path program 25 times [2024-09-13 08:49:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:43,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186874439] [2024-09-13 08:49:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:44,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:44,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:44,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186874439] [2024-09-13 08:49:44,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186874439] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041764830] [2024-09-13 08:49:44,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:44,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:44,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:44,177 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) [2024-09-13 08:49:44,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-13 08:49:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:44,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 08:49:44,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:44,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:44,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041764830] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:44,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:44,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 48 [2024-09-13 08:49:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233207876] [2024-09-13 08:49:44,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:44,886 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:49:44,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:49:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:49:44,887 INFO L87 Difference]: Start difference. First operand 108 states and 146 transitions. Second operand has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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) [2024-09-13 08:49:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:50,022 INFO L93 Difference]: Finished difference Result 192 states and 251 transitions. [2024-09-13 08:49:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-13 08:49:50,023 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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 33 [2024-09-13 08:49:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:50,023 INFO L225 Difference]: With dead ends: 192 [2024-09-13 08:49:50,023 INFO L226 Difference]: Without dead ends: 174 [2024-09-13 08:49:50,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2870 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2165, Invalid=12355, Unknown=0, NotChecked=0, Total=14520 [2024-09-13 08:49:50,025 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:50,025 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 241 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:49:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-13 08:49:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 115. [2024-09-13 08:49:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.3454545454545455) internal successors, (148), 110 states have internal predecessors, (148), 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) [2024-09-13 08:49:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 152 transitions. [2024-09-13 08:49:50,112 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 152 transitions. Word has length 33 [2024-09-13 08:49:50,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:50,112 INFO L474 AbstractCegarLoop]: Abstraction has 115 states and 152 transitions. [2024-09-13 08:49:50,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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) [2024-09-13 08:49:50,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 152 transitions. [2024-09-13 08:49:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 08:49:50,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:50,113 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:50,125 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-13 08:49:50,313 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:50,314 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:50,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:50,314 INFO L85 PathProgramCache]: Analyzing trace with hash 8411784, now seen corresponding path program 26 times [2024-09-13 08:49:50,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:50,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218548560] [2024-09-13 08:49:50,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:50,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:51,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:51,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218548560] [2024-09-13 08:49:51,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218548560] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125330557] [2024-09-13 08:49:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:51,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:51,331 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) [2024-09-13 08:49:51,332 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-13 08:49:51,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:51,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:51,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-13 08:49:51,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:51,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:52,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125330557] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:52,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:52,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2024-09-13 08:49:52,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007502207] [2024-09-13 08:49:52,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:52,628 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-13 08:49:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-13 08:49:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2582, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 08:49:52,629 INFO L87 Difference]: Start difference. First operand 115 states and 152 transitions. Second operand has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 51 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:57,061 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 [] [2024-09-13 08:49:57,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:57,511 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2024-09-13 08:49:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 08:49:57,512 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 51 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-13 08:49:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:57,513 INFO L225 Difference]: With dead ends: 132 [2024-09-13 08:49:57,513 INFO L226 Difference]: Without dead ends: 127 [2024-09-13 08:49:57,513 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=180, Invalid=2682, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:49:57,513 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:57,514 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 225 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 747 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-09-13 08:49:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-13 08:49:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2024-09-13 08:49:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.348623853211009) internal successors, (147), 109 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) [2024-09-13 08:49:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2024-09-13 08:49:57,621 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 34 [2024-09-13 08:49:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:57,621 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2024-09-13 08:49:57,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 51 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:57,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2024-09-13 08:49:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 08:49:57,622 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:57,622 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:57,637 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-13 08:49:57,823 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:57,823 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:57,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:57,823 INFO L85 PathProgramCache]: Analyzing trace with hash 296303061, now seen corresponding path program 27 times [2024-09-13 08:49:57,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:57,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839236230] [2024-09-13 08:49:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:57,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:58,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:58,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:58,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839236230] [2024-09-13 08:49:58,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839236230] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374176130] [2024-09-13 08:49:58,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:58,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:58,196 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) [2024-09-13 08:49:58,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-13 08:49:58,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-13 08:49:58,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:58,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 08:49:58,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:58,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:59,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374176130] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:59,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:59,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 52 [2024-09-13 08:49:59,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629804378] [2024-09-13 08:49:59,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:59,133 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-13 08:49:59,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-13 08:49:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 08:49:59,134 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 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) [2024-09-13 08:50:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:07,110 INFO L93 Difference]: Finished difference Result 209 states and 274 transitions. [2024-09-13 08:50:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2024-09-13 08:50:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 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 35 [2024-09-13 08:50:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:07,111 INFO L225 Difference]: With dead ends: 209 [2024-09-13 08:50:07,111 INFO L226 Difference]: Without dead ends: 190 [2024-09-13 08:50:07,113 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2815, Invalid=16091, Unknown=0, NotChecked=0, Total=18906 [2024-09-13 08:50:07,113 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:07,114 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 260 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:50:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-09-13 08:50:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2024-09-13 08:50:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.346774193548387) internal successors, (167), 124 states have internal predecessors, (167), 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) [2024-09-13 08:50:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2024-09-13 08:50:07,242 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 35 [2024-09-13 08:50:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:07,243 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2024-09-13 08:50:07,243 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 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) [2024-09-13 08:50:07,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2024-09-13 08:50:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 08:50:07,243 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:07,243 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:07,260 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:07,444 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:07,444 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:07,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash 968930121, now seen corresponding path program 28 times [2024-09-13 08:50:07,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:07,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617623765] [2024-09-13 08:50:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:07,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:08,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:08,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617623765] [2024-09-13 08:50:08,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617623765] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527663358] [2024-09-13 08:50:08,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:50:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:08,613 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) [2024-09-13 08:50:08,615 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-13 08:50:08,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:50:08,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:08,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-13 08:50:08,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:09,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:10,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527663358] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:10,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:10,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 17] total 57 [2024-09-13 08:50:10,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003610788] [2024-09-13 08:50:10,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:10,346 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-13 08:50:10,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:10,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-13 08:50:10,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3004, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 08:50:10,347 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 55 states have internal predecessors, (89), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:14,984 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 [] [2024-09-13 08:50:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:15,489 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2024-09-13 08:50:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 08:50:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 55 states have internal predecessors, (89), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-13 08:50:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:15,490 INFO L225 Difference]: With dead ends: 147 [2024-09-13 08:50:15,490 INFO L226 Difference]: Without dead ends: 142 [2024-09-13 08:50:15,491 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=194, Invalid=3112, Unknown=0, NotChecked=0, Total=3306 [2024-09-13 08:50:15,491 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:15,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 265 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 945 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-09-13 08:50:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-13 08:50:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2024-09-13 08:50:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.3495934959349594) internal successors, (166), 123 states have internal predecessors, (166), 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) [2024-09-13 08:50:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 170 transitions. [2024-09-13 08:50:15,619 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 170 transitions. Word has length 36 [2024-09-13 08:50:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:15,620 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 170 transitions. [2024-09-13 08:50:15,620 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 55 states have internal predecessors, (89), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:15,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 170 transitions. [2024-09-13 08:50:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 08:50:15,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:15,621 INFO L216 NwaCegarLoop]: trace histogram [18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:15,633 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:15,821 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-13 08:50:15,822 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:15,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:15,822 INFO L85 PathProgramCache]: Analyzing trace with hash -294547543, now seen corresponding path program 29 times [2024-09-13 08:50:15,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:15,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779547605] [2024-09-13 08:50:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:15,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:16,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:16,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:16,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779547605] [2024-09-13 08:50:16,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779547605] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:16,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341260006] [2024-09-13 08:50:16,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:50:16,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:16,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:16,324 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) [2024-09-13 08:50:16,325 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-13 08:50:16,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-13 08:50:16,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:16,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-13 08:50:16,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:16,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:17,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341260006] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:17,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:17,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2024-09-13 08:50:17,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065990851] [2024-09-13 08:50:17,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:17,393 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-13 08:50:17,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:17,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-13 08:50:17,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2024-09-13 08:50:17,395 INFO L87 Difference]: Start difference. First operand 128 states and 170 transitions. Second operand has 55 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 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) [2024-09-13 08:50:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:26,110 INFO L93 Difference]: Finished difference Result 255 states and 344 transitions. [2024-09-13 08:50:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-09-13 08:50:26,110 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 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 36 [2024-09-13 08:50:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:26,112 INFO L225 Difference]: With dead ends: 255 [2024-09-13 08:50:26,112 INFO L226 Difference]: Without dead ends: 250 [2024-09-13 08:50:26,112 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1525, Invalid=7217, Unknown=0, NotChecked=0, Total=8742 [2024-09-13 08:50:26,113 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 241 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:26,113 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 449 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:50:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-09-13 08:50:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 135. [2024-09-13 08:50:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.376923076923077) internal successors, (179), 130 states have internal predecessors, (179), 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) [2024-09-13 08:50:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 183 transitions. [2024-09-13 08:50:26,238 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 183 transitions. Word has length 36 [2024-09-13 08:50:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:26,238 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 183 transitions. [2024-09-13 08:50:26,238 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 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) [2024-09-13 08:50:26,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 183 transitions. [2024-09-13 08:50:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 08:50:26,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:26,238 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:26,251 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:26,439 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-13 08:50:26,439 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:26,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:26,439 INFO L85 PathProgramCache]: Analyzing trace with hash 7600436, now seen corresponding path program 30 times [2024-09-13 08:50:26,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:26,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776313321] [2024-09-13 08:50:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:26,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:26,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:26,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:26,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776313321] [2024-09-13 08:50:26,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776313321] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:26,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111017494] [2024-09-13 08:50:26,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:50:26,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:26,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:26,930 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) [2024-09-13 08:50:26,936 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-13 08:50:27,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-13 08:50:27,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:27,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 08:50:27,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:27,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:28,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111017494] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:28,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:28,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 56 [2024-09-13 08:50:28,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116925274] [2024-09-13 08:50:28,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:28,043 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-13 08:50:28,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-13 08:50:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 08:50:28,044 INFO L87 Difference]: Start difference. First operand 135 states and 183 transitions. Second operand has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 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) [2024-09-13 08:50:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:38,883 INFO L93 Difference]: Finished difference Result 240 states and 316 transitions. [2024-09-13 08:50:38,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2024-09-13 08:50:38,883 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 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 [2024-09-13 08:50:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:38,884 INFO L225 Difference]: With dead ends: 240 [2024-09-13 08:50:38,884 INFO L226 Difference]: Without dead ends: 220 [2024-09-13 08:50:38,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5288 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3599, Invalid=20581, Unknown=0, NotChecked=0, Total=24180 [2024-09-13 08:50:38,886 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:38,886 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 295 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:50:38,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-09-13 08:50:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 143. [2024-09-13 08:50:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.3478260869565217) internal successors, (186), 138 states have internal predecessors, (186), 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) [2024-09-13 08:50:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 190 transitions. [2024-09-13 08:50:39,062 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 190 transitions. Word has length 37 [2024-09-13 08:50:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:39,063 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 190 transitions. [2024-09-13 08:50:39,063 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 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) [2024-09-13 08:50:39,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 190 transitions. [2024-09-13 08:50:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 08:50:39,064 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:39,064 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:39,079 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:39,264 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-13 08:50:39,264 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:39,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2137856600, now seen corresponding path program 31 times [2024-09-13 08:50:39,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:39,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446268998] [2024-09-13 08:50:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:39,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:40,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:40,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:40,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446268998] [2024-09-13 08:50:40,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446268998] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:40,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440858831] [2024-09-13 08:50:40,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:50:40,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:40,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:40,500 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) [2024-09-13 08:50:40,501 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-13 08:50:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:40,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-13 08:50:40,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:41,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:42,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440858831] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:42,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:42,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 18, 18] total 61 [2024-09-13 08:50:42,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526608495] [2024-09-13 08:50:42,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:42,286 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-13 08:50:42,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:42,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-13 08:50:42,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3458, Unknown=0, NotChecked=0, Total=3660 [2024-09-13 08:50:42,287 INFO L87 Difference]: Start difference. First operand 143 states and 190 transitions. Second operand has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 59 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:47,215 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 [] [2024-09-13 08:50:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:47,777 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2024-09-13 08:50:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 08:50:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 59 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-13 08:50:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:47,779 INFO L225 Difference]: With dead ends: 162 [2024-09-13 08:50:47,779 INFO L226 Difference]: Without dead ends: 157 [2024-09-13 08:50:47,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=208, Invalid=3574, Unknown=0, NotChecked=0, Total=3782 [2024-09-13 08:50:47,780 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:47,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 265 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1013 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2024-09-13 08:50:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-13 08:50:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2024-09-13 08:50:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.3503649635036497) internal successors, (185), 137 states have internal predecessors, (185), 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) [2024-09-13 08:50:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 189 transitions. [2024-09-13 08:50:47,977 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 189 transitions. Word has length 38 [2024-09-13 08:50:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:47,978 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 189 transitions. [2024-09-13 08:50:47,978 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 59 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:47,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 189 transitions. [2024-09-13 08:50:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-13 08:50:47,979 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:47,979 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:47,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:48,179 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-13 08:50:48,179 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:48,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1813507403, now seen corresponding path program 32 times [2024-09-13 08:50:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:48,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398106305] [2024-09-13 08:50:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:48,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:48,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:48,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:48,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398106305] [2024-09-13 08:50:48,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398106305] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:48,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033887945] [2024-09-13 08:50:48,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:50:48,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:48,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:48,739 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) [2024-09-13 08:50:48,740 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-13 08:50:48,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:50:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:48,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-13 08:50:48,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:48,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:49,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033887945] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:49,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:49,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 60 [2024-09-13 08:50:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293954627] [2024-09-13 08:50:49,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:49,934 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-13 08:50:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-13 08:50:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=3029, Unknown=0, NotChecked=0, Total=3540 [2024-09-13 08:50:49,936 INFO L87 Difference]: Start difference. First operand 142 states and 189 transitions. Second operand has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 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) [2024-09-13 08:51:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:04,075 INFO L93 Difference]: Finished difference Result 259 states and 342 transitions. [2024-09-13 08:51:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2024-09-13 08:51:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 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 39 [2024-09-13 08:51:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:04,076 INFO L225 Difference]: With dead ends: 259 [2024-09-13 08:51:04,077 INFO L226 Difference]: Without dead ends: 238 [2024-09-13 08:51:04,078 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6947 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=4534, Invalid=25916, Unknown=0, NotChecked=0, Total=30450 [2024-09-13 08:51:04,079 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:04,079 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 306 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:51:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-09-13 08:51:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 159. [2024-09-13 08:51:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.3506493506493507) internal successors, (208), 154 states have internal predecessors, (208), 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) [2024-09-13 08:51:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 212 transitions. [2024-09-13 08:51:04,391 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 212 transitions. Word has length 39 [2024-09-13 08:51:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:04,391 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 212 transitions. [2024-09-13 08:51:04,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 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) [2024-09-13 08:51:04,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 212 transitions. [2024-09-13 08:51:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 08:51:04,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:04,392 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:04,405 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-13 08:51:04,593 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-13 08:51:04,593 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:04,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2013416919, now seen corresponding path program 33 times [2024-09-13 08:51:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:04,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873394540] [2024-09-13 08:51:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:04,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:06,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:06,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:06,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873394540] [2024-09-13 08:51:06,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873394540] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:06,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827841037] [2024-09-13 08:51:06,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:51:06,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:06,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:06,090 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) [2024-09-13 08:51:06,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-13 08:51:06,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-13 08:51:06,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:06,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-13 08:51:06,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:06,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:08,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827841037] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:08,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:08,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 19] total 65 [2024-09-13 08:51:08,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320871755] [2024-09-13 08:51:08,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:08,416 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-13 08:51:08,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:08,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-13 08:51:08,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3944, Unknown=0, NotChecked=0, Total=4160 [2024-09-13 08:51:08,417 INFO L87 Difference]: Start difference. First operand 159 states and 212 transitions. Second operand has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 63 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:13,343 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 [] [2024-09-13 08:51:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:13,969 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2024-09-13 08:51:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 08:51:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 63 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-13 08:51:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:13,971 INFO L225 Difference]: With dead ends: 179 [2024-09-13 08:51:13,971 INFO L226 Difference]: Without dead ends: 174 [2024-09-13 08:51:13,971 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=222, Invalid=4068, Unknown=0, NotChecked=0, Total=4290 [2024-09-13 08:51:13,972 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:13,972 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 273 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1110 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2024-09-13 08:51:13,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-13 08:51:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 158. [2024-09-13 08:51:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.3529411764705883) internal successors, (207), 153 states have internal predecessors, (207), 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) [2024-09-13 08:51:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 211 transitions. [2024-09-13 08:51:14,243 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 211 transitions. Word has length 40 [2024-09-13 08:51:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:14,244 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 211 transitions. [2024-09-13 08:51:14,244 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 63 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:14,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 211 transitions. [2024-09-13 08:51:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 08:51:14,245 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:14,245 INFO L216 NwaCegarLoop]: trace histogram [21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:14,259 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-13 08:51:14,445 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-13 08:51:14,445 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:14,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:14,446 INFO L85 PathProgramCache]: Analyzing trace with hash -640559416, now seen corresponding path program 34 times [2024-09-13 08:51:14,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:14,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381368040] [2024-09-13 08:51:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:14,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:15,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:15,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:15,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381368040] [2024-09-13 08:51:15,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381368040] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:15,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705116168] [2024-09-13 08:51:15,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:51:15,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:15,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:15,046 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) [2024-09-13 08:51:15,048 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-13 08:51:15,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:51:15,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:15,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-13 08:51:15,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:15,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:16,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705116168] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:16,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:16,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2024-09-13 08:51:16,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292085526] [2024-09-13 08:51:16,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:16,400 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-13 08:51:16,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-13 08:51:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=3227, Unknown=0, NotChecked=0, Total=3906 [2024-09-13 08:51:16,401 INFO L87 Difference]: Start difference. First operand 158 states and 211 transitions. Second operand has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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) [2024-09-13 08:51:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:31,675 INFO L93 Difference]: Finished difference Result 320 states and 432 transitions. [2024-09-13 08:51:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-09-13 08:51:31,675 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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 [2024-09-13 08:51:31,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:31,676 INFO L225 Difference]: With dead ends: 320 [2024-09-13 08:51:31,676 INFO L226 Difference]: Without dead ends: 315 [2024-09-13 08:51:31,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=2100, Invalid=10332, Unknown=0, NotChecked=0, Total=12432 [2024-09-13 08:51:31,677 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 308 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:31,677 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 519 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 08:51:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-09-13 08:51:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 165. [2024-09-13 08:51:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.375) internal successors, (220), 160 states have internal predecessors, (220), 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) [2024-09-13 08:51:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 224 transitions. [2024-09-13 08:51:31,905 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 224 transitions. Word has length 40 [2024-09-13 08:51:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:31,905 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 224 transitions. [2024-09-13 08:51:31,905 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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) [2024-09-13 08:51:31,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 224 transitions. [2024-09-13 08:51:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 08:51:31,906 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:31,906 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:31,921 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-13 08:51:32,110 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-13 08:51:32,111 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:32,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2044122708, now seen corresponding path program 35 times [2024-09-13 08:51:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:32,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209370462] [2024-09-13 08:51:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:32,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:32,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:32,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209370462] [2024-09-13 08:51:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209370462] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742845629] [2024-09-13 08:51:32,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:51:32,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:32,583 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) [2024-09-13 08:51:32,584 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-13 08:51:32,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-13 08:51:32,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:32,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 08:51:32,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:32,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:34,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742845629] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:34,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:34,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 64 [2024-09-13 08:51:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368735354] [2024-09-13 08:51:34,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:34,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-13 08:51:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-13 08:51:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3455, Unknown=0, NotChecked=0, Total=4032 [2024-09-13 08:51:34,143 INFO L87 Difference]: Start difference. First operand 165 states and 224 transitions. Second operand has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 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) [2024-09-13 08:51:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:52,015 INFO L93 Difference]: Finished difference Result 293 states and 388 transitions. [2024-09-13 08:51:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2024-09-13 08:51:52,016 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 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 [2024-09-13 08:51:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:52,017 INFO L225 Difference]: With dead ends: 293 [2024-09-13 08:51:52,017 INFO L226 Difference]: Without dead ends: 271 [2024-09-13 08:51:52,018 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8965 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=5638, Invalid=32192, Unknown=0, NotChecked=0, Total=37830 [2024-09-13 08:51:52,018 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:52,019 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 348 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:51:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-09-13 08:51:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 174. [2024-09-13 08:51:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.349112426035503) internal successors, (228), 169 states have internal predecessors, (228), 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) [2024-09-13 08:51:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 232 transitions. [2024-09-13 08:51:52,325 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 232 transitions. Word has length 41 [2024-09-13 08:51:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:52,325 INFO L474 AbstractCegarLoop]: Abstraction has 174 states and 232 transitions. [2024-09-13 08:51:52,325 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 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) [2024-09-13 08:51:52,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 232 transitions. [2024-09-13 08:51:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 08:51:52,326 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:52,326 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:52,338 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-13 08:51:52,526 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-13 08:51:52,526 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:52,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:52,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1090361144, now seen corresponding path program 36 times [2024-09-13 08:51:52,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:52,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992381457] [2024-09-13 08:51:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:52,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:54,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:54,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:54,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992381457] [2024-09-13 08:51:54,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992381457] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:54,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822026467] [2024-09-13 08:51:54,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:51:54,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:54,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:54,136 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:51:54,137 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-13 08:51:54,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-13 08:51:54,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:54,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-13 08:51:54,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:54,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:56,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822026467] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:56,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:56,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 20, 20] total 69 [2024-09-13 08:51:56,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24600171] [2024-09-13 08:51:56,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:56,688 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-13 08:51:56,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:56,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-13 08:51:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4462, Unknown=0, NotChecked=0, Total=4692 [2024-09-13 08:51:56,689 INFO L87 Difference]: Start difference. First operand 174 states and 232 transitions. Second operand has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 67 states have internal predecessors, (107), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:01,866 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 [] [2024-09-13 08:52:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:02,703 INFO L93 Difference]: Finished difference Result 195 states and 253 transitions. [2024-09-13 08:52:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 08:52:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 67 states have internal predecessors, (107), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-13 08:52:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:02,704 INFO L225 Difference]: With dead ends: 195 [2024-09-13 08:52:02,704 INFO L226 Difference]: Without dead ends: 190 [2024-09-13 08:52:02,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=236, Invalid=4594, Unknown=0, NotChecked=0, Total=4830 [2024-09-13 08:52:02,705 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:02,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 289 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1245 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2024-09-13 08:52:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-09-13 08:52:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2024-09-13 08:52:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.3511904761904763) internal successors, (227), 168 states have internal predecessors, (227), 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) [2024-09-13 08:52:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2024-09-13 08:52:03,001 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 42 [2024-09-13 08:52:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:03,001 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2024-09-13 08:52:03,002 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 67 states have internal predecessors, (107), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:03,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2024-09-13 08:52:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 08:52:03,002 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:03,002 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:03,020 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-13 08:52:03,203 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:03,203 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:03,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash 594080661, now seen corresponding path program 37 times [2024-09-13 08:52:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:03,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066760867] [2024-09-13 08:52:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:03,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:03,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:03,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066760867] [2024-09-13 08:52:03,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066760867] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:03,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702265312] [2024-09-13 08:52:03,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:52:03,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:03,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:03,898 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:52:03,899 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-13 08:52:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:03,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 08:52:03,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:04,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:05,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702265312] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:05,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:05,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 68 [2024-09-13 08:52:05,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092415623] [2024-09-13 08:52:05,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:05,380 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-13 08:52:05,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-13 08:52:05,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=3909, Unknown=0, NotChecked=0, Total=4556 [2024-09-13 08:52:05,382 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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) [2024-09-13 08:52:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:28,137 INFO L93 Difference]: Finished difference Result 314 states and 417 transitions. [2024-09-13 08:52:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2024-09-13 08:52:28,138 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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 [2024-09-13 08:52:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:28,139 INFO L225 Difference]: With dead ends: 314 [2024-09-13 08:52:28,139 INFO L226 Difference]: Without dead ends: 291 [2024-09-13 08:52:28,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11390 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=6930, Invalid=39510, Unknown=0, NotChecked=0, Total=46440 [2024-09-13 08:52:28,142 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:28,142 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 411 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 08:52:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-09-13 08:52:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 192. [2024-09-13 08:52:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.3529411764705883) internal successors, (253), 187 states have internal predecessors, (253), 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) [2024-09-13 08:52:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 257 transitions. [2024-09-13 08:52:28,509 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 257 transitions. Word has length 43 [2024-09-13 08:52:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:28,510 INFO L474 AbstractCegarLoop]: Abstraction has 192 states and 257 transitions. [2024-09-13 08:52:28,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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) [2024-09-13 08:52:28,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 257 transitions. [2024-09-13 08:52:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 08:52:28,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:28,511 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:28,526 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-13 08:52:28,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:28,712 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:28,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash -872826615, now seen corresponding path program 38 times [2024-09-13 08:52:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:28,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838530369] [2024-09-13 08:52:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:30,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:30,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:30,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838530369] [2024-09-13 08:52:30,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838530369] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:30,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336927005] [2024-09-13 08:52:30,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:52:30,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:30,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:30,416 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:52:30,418 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-13 08:52:30,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:52:30,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:52:30,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-13 08:52:30,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:31,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336927005] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:33,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:33,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 21, 21] total 73 [2024-09-13 08:52:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617147666] [2024-09-13 08:52:33,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:33,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-13 08:52:33,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-13 08:52:33,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=5012, Unknown=0, NotChecked=0, Total=5256 [2024-09-13 08:52:33,102 INFO L87 Difference]: Start difference. First operand 192 states and 257 transitions. Second operand has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 71 states have internal predecessors, (113), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:38,426 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 [] [2024-09-13 08:52:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:39,361 INFO L93 Difference]: Finished difference Result 214 states and 279 transitions. [2024-09-13 08:52:39,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 08:52:39,361 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 71 states have internal predecessors, (113), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-13 08:52:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:39,362 INFO L225 Difference]: With dead ends: 214 [2024-09-13 08:52:39,362 INFO L226 Difference]: Without dead ends: 209 [2024-09-13 08:52:39,363 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=250, Invalid=5152, Unknown=0, NotChecked=0, Total=5402 [2024-09-13 08:52:39,363 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:39,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 329 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1501 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-09-13 08:52:39,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-09-13 08:52:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2024-09-13 08:52:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.3548387096774193) internal successors, (252), 186 states have internal predecessors, (252), 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) [2024-09-13 08:52:39,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2024-09-13 08:52:39,744 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 44 [2024-09-13 08:52:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:39,744 INFO L474 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2024-09-13 08:52:39,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 71 states have internal predecessors, (113), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:39,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:39,744 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2024-09-13 08:52:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 08:52:39,745 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:39,745 INFO L216 NwaCegarLoop]: trace histogram [24, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:39,758 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-13 08:52:39,945 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-09-13 08:52:39,946 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:39,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:39,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1333110391, now seen corresponding path program 39 times [2024-09-13 08:52:39,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:39,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530157920] [2024-09-13 08:52:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:39,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:40,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:40,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530157920] [2024-09-13 08:52:40,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530157920] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512498936] [2024-09-13 08:52:40,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:52:40,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:40,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:40,546 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:52:40,547 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-13 08:52:40,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-13 08:52:40,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:52:40,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-13 08:52:40,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:40,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:42,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512498936] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:42,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:42,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 71 [2024-09-13 08:52:42,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134833556] [2024-09-13 08:52:42,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:42,339 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-13 08:52:42,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:42,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-13 08:52:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=4116, Unknown=0, NotChecked=0, Total=4970 [2024-09-13 08:52:42,341 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 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) [2024-09-13 08:53:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:53:07,718 INFO L93 Difference]: Finished difference Result 392 states and 529 transitions. [2024-09-13 08:53:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-09-13 08:53:07,718 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 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 44 [2024-09-13 08:53:07,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:53:07,719 INFO L225 Difference]: With dead ends: 392 [2024-09-13 08:53:07,719 INFO L226 Difference]: Without dead ends: 387 [2024-09-13 08:53:07,721 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=2796, Invalid=14234, Unknown=0, NotChecked=0, Total=17030 [2024-09-13 08:53:07,721 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 404 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 08:53:07,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 611 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 08:53:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-09-13 08:53:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 198. [2024-09-13 08:53:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.3730569948186528) internal successors, (265), 193 states have internal predecessors, (265), 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) [2024-09-13 08:53:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 269 transitions. [2024-09-13 08:53:08,087 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 269 transitions. Word has length 44 [2024-09-13 08:53:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:53:08,087 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 269 transitions. [2024-09-13 08:53:08,087 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 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) [2024-09-13 08:53:08,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 269 transitions. [2024-09-13 08:53:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-13 08:53:08,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:53:08,088 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:53:08,100 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-09-13 08:53:08,288 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:53:08,289 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:53:08,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:08,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1252283532, now seen corresponding path program 40 times [2024-09-13 08:53:08,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:53:08,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030442008] [2024-09-13 08:53:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:53:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:53:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:08,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:53:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:53:08,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:53:08,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030442008] [2024-09-13 08:53:08,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030442008] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:53:08,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728860816] [2024-09-13 08:53:08,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:53:08,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:53:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:53:08,865 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:53:08,866 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-13 08:53:08,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:53:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:53:08,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-13 08:53:08,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:53:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:53:09,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:53:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:53:10,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728860816] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:53:10,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:53:10,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 72 [2024-09-13 08:53:10,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925007501] [2024-09-13 08:53:10,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:53:10,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-13 08:53:10,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:53:10,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-13 08:53:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=4391, Unknown=0, NotChecked=0, Total=5112 [2024-09-13 08:53:10,595 INFO L87 Difference]: Start difference. First operand 198 states and 269 transitions. Second operand has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 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)