./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.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 e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 22:28:08,142 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:28:08,200 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:28:08,204 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:28:08,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:28:08,228 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:28:08,228 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:28:08,229 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:28:08,229 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:28:08,230 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:28:08,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:28:08,230 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:28:08,231 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:28:08,232 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:28:08,233 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:28:08,233 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:28:08,233 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:28:08,233 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:28:08,233 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:28:08,234 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:28:08,234 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:28:08,236 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:28:08,237 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:28:08,237 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:28:08,237 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:28:08,237 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:28:08,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:28:08,237 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:28:08,237 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:28:08,237 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:28:08,238 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:28:08,238 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:28:08,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:28:08,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:28:08,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:28:08,238 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:28:08,238 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:28:08,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:28:08,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:28:08,239 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:28:08,239 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:28:08,240 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:28:08,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:28:08,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:28:08,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:28:08,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:28:08,428 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:28:08,429 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:28:08,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2024-09-12 22:28:09,580 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:28:09,743 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:28:09,744 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2024-09-12 22:28:09,750 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7250a6d37/1f54516331e240dfa18344044d57dc22/FLAG46652ba3d [2024-09-12 22:28:10,159 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7250a6d37/1f54516331e240dfa18344044d57dc22 [2024-09-12 22:28:10,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:28:10,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:28:10,167 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:28:10,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:28:10,171 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:28:10,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585f4bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10, skipping insertion in model container [2024-09-12 22:28:10,172 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,186 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:28:10,295 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/mono-crafted_8.c[318,331] [2024-09-12 22:28:10,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:28:10,311 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:28:10,320 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/mono-crafted_8.c[318,331] [2024-09-12 22:28:10,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:28:10,332 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:28:10,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10 WrapperNode [2024-09-12 22:28:10,333 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:28:10,333 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:28:10,333 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:28:10,334 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:28:10,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,347 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:28:10,347 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:28:10,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:28:10,348 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:28:10,348 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:28:10,354 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,355 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,363 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 22:28:10,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:28:10,369 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:28:10,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:28:10,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:28:10,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (1/1) ... [2024-09-12 22:28:10,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:28:10,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:28:10,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 22:28:10,402 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 22:28:10,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:28:10,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:28:10,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:28:10,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:28:10,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:28:10,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:28:10,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:28:10,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:28:10,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 22:28:10,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 22:28:10,492 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:28:10,494 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:28:10,594 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-12 22:28:10,594 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:28:10,608 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:28:10,608 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 22:28:10,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:28:10 BoogieIcfgContainer [2024-09-12 22:28:10,609 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:28:10,610 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:28:10,610 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:28:10,612 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:28:10,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:28:10" (1/3) ... [2024-09-12 22:28:10,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1f982f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:28:10, skipping insertion in model container [2024-09-12 22:28:10,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:28:10" (2/3) ... [2024-09-12 22:28:10,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1f982f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:28:10, skipping insertion in model container [2024-09-12 22:28:10,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:28:10" (3/3) ... [2024-09-12 22:28:10,615 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2024-09-12 22:28:10,626 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:28:10,627 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 22:28:10,673 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:28:10,681 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;@4ef60c74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:28:10,681 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 22:28:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:28:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 22:28:10,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:10,691 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:10,691 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:10,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1710538099, now seen corresponding path program 1 times [2024-09-12 22:28:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:10,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372908546] [2024-09-12 22:28:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:10,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:10,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:10,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372908546] [2024-09-12 22:28:10,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372908546] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:28:10,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:28:10,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 22:28:10,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264450641] [2024-09-12 22:28:10,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:28:10,837 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 22:28:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 22:28:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:28:10,856 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:28:10,877 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-09-12 22:28:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 22:28:10,879 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 10 [2024-09-12 22:28:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:28:10,883 INFO L225 Difference]: With dead ends: 30 [2024-09-12 22:28:10,883 INFO L226 Difference]: Without dead ends: 13 [2024-09-12 22:28:10,885 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:28:10,887 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 [2024-09-12 22:28:10,888 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] [2024-09-12 22:28:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-12 22:28:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-12 22:28:10,910 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) [2024-09-12 22:28:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-09-12 22:28:10,912 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2024-09-12 22:28:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:28:10,912 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-09-12 22:28:10,913 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:10,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-09-12 22:28:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 22:28:10,914 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:10,914 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:10,914 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:28:10,914 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:10,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1720696830, now seen corresponding path program 1 times [2024-09-12 22:28:10,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:10,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631818234] [2024-09-12 22:28:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:10,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:11,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:11,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:11,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631818234] [2024-09-12 22:28:11,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631818234] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:28:11,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:28:11,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:28:11,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163038172] [2024-09-12 22:28:11,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:28:11,106 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:28:11,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:11,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:28:11,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:28:11,107 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:11,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:28:11,124 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-09-12 22:28:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:28:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2024-09-12 22:28:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:28:11,125 INFO L225 Difference]: With dead ends: 24 [2024-09-12 22:28:11,126 INFO L226 Difference]: Without dead ends: 16 [2024-09-12 22:28:11,126 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:28:11,127 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:28:11,127 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:28:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-12 22:28:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-09-12 22:28:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-09-12 22:28:11,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2024-09-12 22:28:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:28:11,135 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-09-12 22:28:11,135 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:11,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-09-12 22:28:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-12 22:28:11,137 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:11,137 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:11,137 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 22:28:11,138 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:11,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:11,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1696808404, now seen corresponding path program 1 times [2024-09-12 22:28:11,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:11,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982043972] [2024-09-12 22:28:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:11,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:11,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982043972] [2024-09-12 22:28:11,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982043972] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:28:11,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585338435] [2024-09-12 22:28:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:11,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:11,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:28:11,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:28:11,302 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:28:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:11,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:28:11,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:28:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:11,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:28:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:11,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585338435] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:28:11,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:28:11,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2024-09-12 22:28:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931466051] [2024-09-12 22:28:11,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:28:11,469 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:28:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:28:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:28:11,471 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:28:11,536 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-09-12 22:28:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:28:11,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 [2024-09-12 22:28:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:28:11,537 INFO L225 Difference]: With dead ends: 31 [2024-09-12 22:28:11,537 INFO L226 Difference]: Without dead ends: 23 [2024-09-12 22:28:11,537 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:28:11,538 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:28:11,539 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:28:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-12 22:28:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-12 22:28:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2024-09-12 22:28:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-12 22:28:11,544 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2024-09-12 22:28:11,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:28:11,545 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-12 22:28:11,545 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:11,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:11,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-12 22:28:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 22:28:11,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:11,547 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:11,560 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 22:28:11,747 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:11,748 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:11,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash 177718978, now seen corresponding path program 1 times [2024-09-12 22:28:11,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:11,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040141967] [2024-09-12 22:28:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:11,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:11,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:28:11,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040141967] [2024-09-12 22:28:11,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040141967] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:28:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539407977] [2024-09-12 22:28:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:11,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:11,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:28:11,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:28:11,900 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:28:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:11,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 22:28:11,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:28:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:11,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:28:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:12,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539407977] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:28:12,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:28:12,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-09-12 22:28:12,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487449184] [2024-09-12 22:28:12,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:28:12,047 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 22:28:12,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 22:28:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:28:12,049 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:28:12,160 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-09-12 22:28:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:28:12,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 22 [2024-09-12 22:28:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:28:12,163 INFO L225 Difference]: With dead ends: 47 [2024-09-12 22:28:12,163 INFO L226 Difference]: Without dead ends: 37 [2024-09-12 22:28:12,164 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:28:12,165 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:28:12,167 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:28:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-12 22:28:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-09-12 22:28:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-09-12 22:28:12,181 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2024-09-12 22:28:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:28:12,182 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-09-12 22:28:12,182 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:12,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-09-12 22:28:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 22:28:12,184 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:12,184 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:12,196 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 22:28:12,388 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:12,389 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:12,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:12,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1559699330, now seen corresponding path program 2 times [2024-09-12 22:28:12,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:12,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344121836] [2024-09-12 22:28:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:12,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:12,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:12,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344121836] [2024-09-12 22:28:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344121836] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:28:12,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177555949] [2024-09-12 22:28:12,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:28:12,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:12,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:28:12,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:28:12,584 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:28:12,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:28:12,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:28:12,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 22:28:12,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:28:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:12,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:28:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:12,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177555949] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:28:12,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:28:12,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-09-12 22:28:12,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123707189] [2024-09-12 22:28:12,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:28:12,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 22:28:12,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 22:28:12,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2024-09-12 22:28:12,791 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:28:13,057 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-09-12 22:28:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 22:28:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 22 [2024-09-12 22:28:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:28:13,060 INFO L225 Difference]: With dead ends: 46 [2024-09-12 22:28:13,060 INFO L226 Difference]: Without dead ends: 41 [2024-09-12 22:28:13,060 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:28:13,061 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:28:13,061 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 72 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:28:13,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-12 22:28:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-12 22:28:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2024-09-12 22:28:13,074 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2024-09-12 22:28:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:28:13,074 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2024-09-12 22:28:13,074 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:13,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2024-09-12 22:28:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 22:28:13,076 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:13,076 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:13,088 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 22:28:13,279 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:13,280 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:13,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash -254018046, now seen corresponding path program 2 times [2024-09-12 22:28:13,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:13,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15601707] [2024-09-12 22:28:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:13,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:13,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:28:13,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:13,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15601707] [2024-09-12 22:28:13,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15601707] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:28:13,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692516267] [2024-09-12 22:28:13,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:28:13,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:13,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:28:13,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:28:13,433 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:28:13,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:28:13,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:28:13,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 22:28:13,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:28:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:28:13,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:28:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:28:13,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692516267] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:28:13,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:28:13,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-12 22:28:13,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284772579] [2024-09-12 22:28:13,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:28:13,698 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 22:28:13,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 22:28:13,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:28:13,698 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:28:14,718 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2024-09-12 22:28:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 22:28:14,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-12 22:28:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:28:14,719 INFO L225 Difference]: With dead ends: 77 [2024-09-12 22:28:14,719 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 22:28:14,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=506, Unknown=0, NotChecked=0, Total=812 [2024-09-12 22:28:14,720 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:28:14,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 79 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:28:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 22:28:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-09-12 22:28:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2024-09-12 22:28:14,733 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 40 [2024-09-12 22:28:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:28:14,733 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2024-09-12 22:28:14,734 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:14,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2024-09-12 22:28:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 22:28:14,734 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:14,734 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:14,748 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 22:28:14,935 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:14,935 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:14,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1127962306, now seen corresponding path program 3 times [2024-09-12 22:28:14,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:14,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116794308] [2024-09-12 22:28:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:14,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:15,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:15,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:15,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116794308] [2024-09-12 22:28:15,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116794308] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:28:15,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195193755] [2024-09-12 22:28:15,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:28:15,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:28:15,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:28:15,199 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:28:15,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 22:28:15,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:28:15,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 22:28:15,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:28:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-12 22:28:15,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 22:28:15,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195193755] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:28:15,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 22:28:15,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2024-09-12 22:28:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732461941] [2024-09-12 22:28:15,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:28:15,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 22:28:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 22:28:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-09-12 22:28:15,323 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:28:15,368 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2024-09-12 22:28:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:28:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-12 22:28:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:28:15,369 INFO L225 Difference]: With dead ends: 76 [2024-09-12 22:28:15,369 INFO L226 Difference]: Without dead ends: 71 [2024-09-12 22:28:15,369 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:28:15,370 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:28:15,370 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:28:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-12 22:28:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2024-09-12 22:28:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-09-12 22:28:15,386 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 40 [2024-09-12 22:28:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:28:15,386 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-09-12 22:28:15,386 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:15,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-09-12 22:28:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-12 22:28:15,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:15,388 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:15,401 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 22:28:15,588 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 22:28:15,589 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:15,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:15,589 INFO L85 PathProgramCache]: Analyzing trace with hash -653386262, now seen corresponding path program 3 times [2024-09-12 22:28:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:15,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719513204] [2024-09-12 22:28:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:15,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:15,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:28:15,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719513204] [2024-09-12 22:28:15,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719513204] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:28:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176533298] [2024-09-12 22:28:15,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:28:15,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:15,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:28:15,916 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:28:15,917 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:28:15,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:28:15,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:28:15,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 22:28:15,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:28:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-12 22:28:16,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:28:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-12 22:28:16,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176533298] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:28:16,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:28:16,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 32 [2024-09-12 22:28:16,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780880862] [2024-09-12 22:28:16,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:28:16,546 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 22:28:16,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 22:28:16,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2024-09-12 22:28:16,548 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:28:17,372 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2024-09-12 22:28:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 22:28:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 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 67 [2024-09-12 22:28:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:28:17,374 INFO L225 Difference]: With dead ends: 97 [2024-09-12 22:28:17,374 INFO L226 Difference]: Without dead ends: 87 [2024-09-12 22:28:17,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=557, Invalid=2413, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 22:28:17,376 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 62 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:28:17,376 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 43 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:28:17,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-12 22:28:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-09-12 22:28:17,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2024-09-12 22:28:17,396 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 67 [2024-09-12 22:28:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:28:17,396 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2024-09-12 22:28:17,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:17,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2024-09-12 22:28:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-12 22:28:17,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:17,397 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:17,411 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 22:28:17,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:17,599 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:17,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:17,599 INFO L85 PathProgramCache]: Analyzing trace with hash 982073386, now seen corresponding path program 4 times [2024-09-12 22:28:17,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:17,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349312935] [2024-09-12 22:28:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:17,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:18,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 289 proven. 610 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 22:28:18,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:18,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349312935] [2024-09-12 22:28:18,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349312935] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:28:18,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555529165] [2024-09-12 22:28:18,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:28:18,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:18,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:28:18,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:28:18,012 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:28:18,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:28:18,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:28:18,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-12 22:28:18,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:28:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 238 proven. 672 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:28:18,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:28:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 238 proven. 672 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:28:18,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555529165] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:28:18,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:28:18,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 47 [2024-09-12 22:28:18,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858219638] [2024-09-12 22:28:18,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:28:18,899 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-12 22:28:18,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:18,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-12 22:28:18,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=1544, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 22:28:18,902 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:29:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:29:19,907 INFO L93 Difference]: Finished difference Result 180 states and 212 transitions. [2024-09-12 22:29:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-12 22:29:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 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 85 [2024-09-12 22:29:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:29:19,909 INFO L225 Difference]: With dead ends: 180 [2024-09-12 22:29:19,909 INFO L226 Difference]: Without dead ends: 158 [2024-09-12 22:29:19,910 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=1605, Invalid=2951, Unknown=0, NotChecked=0, Total=4556 [2024-09-12 22:29:19,910 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:29:19,911 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 164 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 22:29:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-09-12 22:29:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-09-12 22:29:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:29:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2024-09-12 22:29:19,931 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 85 [2024-09-12 22:29:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:29:19,932 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2024-09-12 22:29:19,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:29:19,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:29:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2024-09-12 22:29:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-09-12 22:29:19,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:29:19,934 INFO L216 NwaCegarLoop]: trace histogram [49, 49, 44, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:29:19,945 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 22:29:20,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:29:20,135 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:29:20,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:29:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2006408406, now seen corresponding path program 5 times [2024-09-12 22:29:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:29:20,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398638793] [2024-09-12 22:29:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:29:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:29:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:29:21,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:29:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:29:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 625 proven. 2926 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 22:29:21,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:29:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398638793] [2024-09-12 22:29:21,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398638793] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:29:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23659462] [2024-09-12 22:29:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:29:21,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:29:21,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:29:21,825 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:29:21,826 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 22:29:22,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2024-09-12 22:29:22,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:29:22,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-12 22:29:22,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:29:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 625 proven. 2926 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 22:29:22,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:29:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 625 proven. 2926 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 22:29:25,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23659462] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:29:25,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:29:25,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 48] total 94 [2024-09-12 22:29:25,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207012006] [2024-09-12 22:29:25,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:29:25,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-09-12 22:29:25,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:29:25,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-09-12 22:29:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2347, Invalid=6395, Unknown=0, NotChecked=0, Total=8742 [2024-09-12 22:29:25,645 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 94 states, 94 states have (on average 2.9893617021276597) internal successors, (281), 94 states have internal predecessors, (281), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:29:51,546 WARN L293 SmtUtils]: Spent 14.39s on a formula simplification. DAG size of input: 271 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:30:14,081 WARN L293 SmtUtils]: Spent 11.28s on a formula simplification. DAG size of input: 265 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:30:43,879 WARN L293 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 259 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:31:17,356 WARN L293 SmtUtils]: Spent 13.52s on a formula simplification. DAG size of input: 253 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:31:49,173 WARN L293 SmtUtils]: Spent 9.85s on a formula simplification. DAG size of input: 247 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:32:25,734 WARN L293 SmtUtils]: Spent 11.23s on a formula simplification. DAG size of input: 241 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:33:02,058 WARN L293 SmtUtils]: Spent 9.16s on a formula simplification. DAG size of input: 235 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:33:42,944 WARN L293 SmtUtils]: Spent 10.23s on a formula simplification. DAG size of input: 229 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:34:16,705 WARN L293 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 223 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:34:56,078 WARN L293 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 217 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:35:41,562 WARN L293 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 211 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:36:29,413 WARN L293 SmtUtils]: Spent 9.52s on a formula simplification. DAG size of input: 205 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:37:16,998 WARN L293 SmtUtils]: Spent 9.74s on a formula simplification. DAG size of input: 199 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:39:22,168 WARN L293 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 181 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15