./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.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 04d6fb36 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_1.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 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --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-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:49:14,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:49:14,713 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:49:14,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:49:14,721 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:49:14,747 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:49:14,750 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:49:14,751 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:49:14,751 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:49:14,752 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:49:14,753 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:49:14,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:49:14,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:49:14,754 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:49:14,754 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:49:14,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:49:14,755 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:49:14,755 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:49:14,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:49:14,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:49:14,760 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:49:14,760 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:49:14,760 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:49:14,760 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:49:14,760 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:49:14,761 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:49:14,761 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:49:14,761 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:49:14,761 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:49:14,761 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:49:14,761 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:49:14,762 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:49:14,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:49:14,762 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:49:14,762 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:49:14,762 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:49:14,762 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:49:14,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:49:14,763 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:49:14,764 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:49:14,765 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:49:14,765 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:49:14,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:49:15,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:49:15,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:49:15,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:49:15,084 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:49:15,085 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:49:15,086 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2024-09-15 18:49:16,566 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:49:16,744 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:49:16,744 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2024-09-15 18:49:16,750 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/933f5c332/61f0cbe25a714118a02aada1cdcabc7f/FLAGf7363881a [2024-09-15 18:49:16,760 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/933f5c332/61f0cbe25a714118a02aada1cdcabc7f [2024-09-15 18:49:16,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:49:16,763 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:49:16,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:49:16,765 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:49:16,768 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:49:16,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:16,770 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f4517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16, skipping insertion in model container [2024-09-15 18:49:16,770 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:16,782 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:49:16,906 WARN L248 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_1.c[318,331] [2024-09-15 18:49:16,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:49:16,942 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:49:16,952 WARN L248 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_1.c[318,331] [2024-09-15 18:49:16,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:49:16,968 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:49:16,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16 WrapperNode [2024-09-15 18:49:16,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:49:16,970 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:49:16,970 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:49:16,970 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:49:16,975 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:16,980 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:16,985 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:49:16,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:49:16,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:49:16,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:49:16,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:49:16,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:16,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:16,994 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:17,006 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]. [2024-09-15 18:49:17,006 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:17,007 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:17,008 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:17,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:17,015 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:17,016 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:17,017 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:49:17,017 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:49:17,017 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:49:17,017 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:49:17,018 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (1/1) ... [2024-09-15 18:49:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:49:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:17,044 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) [2024-09-15 18:49:17,047 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 [2024-09-15 18:49:17,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:49:17,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:49:17,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:49:17,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:49:17,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:49:17,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:49:17,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:49:17,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:49:17,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:49:17,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:49:17,136 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:49:17,137 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:49:17,251 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 18:49:17,251 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:49:17,271 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:49:17,272 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 18:49:17,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:49:17 BoogieIcfgContainer [2024-09-15 18:49:17,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:49:17,275 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:49:17,275 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:49:17,278 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:49:17,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:49:16" (1/3) ... [2024-09-15 18:49:17,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4561a303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:49:17, skipping insertion in model container [2024-09-15 18:49:17,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:49:16" (2/3) ... [2024-09-15 18:49:17,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4561a303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:49:17, skipping insertion in model container [2024-09-15 18:49:17,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:49:17" (3/3) ... [2024-09-15 18:49:17,282 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2024-09-15 18:49:17,298 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:49:17,298 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:49:17,344 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:49:17,352 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;@3a25e52a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:49:17,352 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:49:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 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) [2024-09-15 18:49:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 18:49:17,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:17,362 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:17,362 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:17,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash -630439525, now seen corresponding path program 1 times [2024-09-15 18:49:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:17,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327944532] [2024-09-15 18:49:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:17,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:17,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:49:17,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:17,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327944532] [2024-09-15 18:49:17,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327944532] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:49:17,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:49:17,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 18:49:17,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600263140] [2024-09-15 18:49:17,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:49:17,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 18:49:17,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:17,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 18:49:17,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 18:49:17,532 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-09-15 18:49:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:17,557 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-09-15 18:49:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 18:49:17,559 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2024-09-15 18:49:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:17,564 INFO L225 Difference]: With dead ends: 31 [2024-09-15 18:49:17,564 INFO L226 Difference]: Without dead ends: 13 [2024-09-15 18:49:17,567 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 [2024-09-15 18:49:17,569 INFO L434 NwaCegarLoop]: 19 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, 19 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 [2024-09-15 18:49:17,571 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:49:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-15 18:49:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-15 18:49:17,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-09-15 18:49:17,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2024-09-15 18:49:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:17,601 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-09-15 18:49:17,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-09-15 18:49:17,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-09-15 18:49:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 18:49:17,603 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:17,604 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:17,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:49:17,604 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:17,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:17,606 INFO L85 PathProgramCache]: Analyzing trace with hash -920425119, now seen corresponding path program 1 times [2024-09-15 18:49:17,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:17,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966153178] [2024-09-15 18:49:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:17,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:17,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:49:17,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:17,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966153178] [2024-09-15 18:49:17,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966153178] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:49:17,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:49:17,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 18:49:17,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832124005] [2024-09-15 18:49:17,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:49:17,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 18:49:17,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 18:49:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:49:17,732 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-09-15 18:49:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:17,761 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-09-15 18:49:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 18:49:17,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2024-09-15 18:49:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:17,763 INFO L225 Difference]: With dead ends: 23 [2024-09-15 18:49:17,763 INFO L226 Difference]: Without dead ends: 15 [2024-09-15 18:49:17,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:49:17,765 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:17,766 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:49:17,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-15 18:49:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-15 18:49:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2024-09-15 18:49:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-09-15 18:49:17,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2024-09-15 18:49:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:17,773 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-09-15 18:49:17,773 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-09-15 18:49:17,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-09-15 18:49:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-15 18:49:17,775 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:17,775 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:17,776 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 18:49:17,776 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:17,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 478481828, now seen corresponding path program 1 times [2024-09-15 18:49:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:17,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296981383] [2024-09-15 18:49:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:17,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:17,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:49:17,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:17,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296981383] [2024-09-15 18:49:17,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296981383] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:49:17,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:49:17,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 18:49:17,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932238168] [2024-09-15 18:49:17,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:49:17,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 18:49:17,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:17,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 18:49:17,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:49:17,886 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:17,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:17,905 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-09-15 18:49:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 18:49:17,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-15 18:49:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:17,907 INFO L225 Difference]: With dead ends: 21 [2024-09-15 18:49:17,907 INFO L226 Difference]: Without dead ends: 16 [2024-09-15 18:49:17,907 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:49:17,908 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:17,909 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:49:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-15 18:49:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-15 18:49:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-15 18:49:17,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2024-09-15 18:49:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:17,914 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-15 18:49:17,915 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:17,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-15 18:49:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:49:17,916 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:17,916 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:17,916 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 18:49:17,916 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:17,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1983572541, now seen corresponding path program 1 times [2024-09-15 18:49:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264135141] [2024-09-15 18:49:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:17,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:49:17,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:17,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264135141] [2024-09-15 18:49:17,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264135141] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:17,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660580750] [2024-09-15 18:49:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:17,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:17,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:17,980 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) [2024-09-15 18:49:17,981 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:49:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:18,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-15 18:49:18,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:49:18,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:49:18,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660580750] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:18,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:18,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-15 18:49:18,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790037426] [2024-09-15 18:49:18,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:18,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:49:18,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:18,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:49:18,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:49:18,148 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2024-09-15 18:49:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:18,182 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2024-09-15 18:49:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:49:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 14 [2024-09-15 18:49:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:18,183 INFO L225 Difference]: With dead ends: 30 [2024-09-15 18:49:18,183 INFO L226 Difference]: Without dead ends: 21 [2024-09-15 18:49:18,183 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:49:18,184 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:18,184 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:49:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-15 18:49:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-15 18:49:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2024-09-15 18:49:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-09-15 18:49:18,189 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2024-09-15 18:49:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:18,189 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-09-15 18:49:18,189 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2024-09-15 18:49:18,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-09-15 18:49:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-15 18:49:18,190 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:18,190 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:18,203 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 18:49:18,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:18,395 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:18,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1327944944, now seen corresponding path program 1 times [2024-09-15 18:49:18,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:18,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978250755] [2024-09-15 18:49:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:18,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:49:18,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:18,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978250755] [2024-09-15 18:49:18,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978250755] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:18,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721211526] [2024-09-15 18:49:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:18,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:18,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:18,458 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) [2024-09-15 18:49:18,459 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:49:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:18,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-15 18:49:18,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:49:18,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:49:18,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721211526] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:18,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:18,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-15 18:49:18,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482071945] [2024-09-15 18:49:18,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:18,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:49:18,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:49:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:49:18,551 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2024-09-15 18:49:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:18,596 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-09-15 18:49:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 18:49:18,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-15 18:49:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:18,598 INFO L225 Difference]: With dead ends: 41 [2024-09-15 18:49:18,598 INFO L226 Difference]: Without dead ends: 29 [2024-09-15 18:49:18,599 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:49:18,599 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:18,599 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:49:18,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-15 18:49:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-15 18:49:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2024-09-15 18:49:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-09-15 18:49:18,607 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2024-09-15 18:49:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:18,608 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-09-15 18:49:18,609 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2024-09-15 18:49:18,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:18,609 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-09-15 18:49:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 18:49:18,610 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:18,610 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:18,632 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 18:49:18,811 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:18,811 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:18,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash 822240260, now seen corresponding path program 2 times [2024-09-15 18:49:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:18,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586941237] [2024-09-15 18:49:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:18,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:18,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:49:18,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:18,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586941237] [2024-09-15 18:49:18,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586941237] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:18,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875730806] [2024-09-15 18:49:18,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:49:18,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:18,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:18,967 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) [2024-09-15 18:49:18,968 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:49:19,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:49:19,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:19,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:49:19,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:49:19,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:49:19,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875730806] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:19,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:19,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-15 18:49:19,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311557161] [2024-09-15 18:49:19,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:19,157 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 18:49:19,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 18:49:19,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:49:19,159 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2024-09-15 18:49:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:19,205 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2024-09-15 18:49:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 18:49:19,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-15 18:49:19,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:19,210 INFO L225 Difference]: With dead ends: 57 [2024-09-15 18:49:19,210 INFO L226 Difference]: Without dead ends: 45 [2024-09-15 18:49:19,210 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:49:19,211 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:19,211 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:49:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-15 18:49:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-15 18:49:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 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) [2024-09-15 18:49:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-15 18:49:19,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2024-09-15 18:49:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:19,222 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-15 18:49:19,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2024-09-15 18:49:19,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-15 18:49:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 18:49:19,224 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:19,224 INFO L216 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:19,239 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 18:49:19,424 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 18:49:19,425 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:19,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash -632407572, now seen corresponding path program 3 times [2024-09-15 18:49:19,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:19,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661562957] [2024-09-15 18:49:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:19,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:19,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:49:19,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:19,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661562957] [2024-09-15 18:49:19,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661562957] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:19,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204684655] [2024-09-15 18:49:19,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:49:19,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:19,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:19,784 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) [2024-09-15 18:49:19,785 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:49:19,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:49:19,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:19,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-15 18:49:19,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-15 18:49:19,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-15 18:49:20,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204684655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:20,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:20,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2024-09-15 18:49:20,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073369090] [2024-09-15 18:49:20,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:20,043 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 18:49:20,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:20,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 18:49:20,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2024-09-15 18:49:20,045 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:20,364 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-09-15 18:49:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 18:49:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-15 18:49:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:20,366 INFO L225 Difference]: With dead ends: 69 [2024-09-15 18:49:20,366 INFO L226 Difference]: Without dead ends: 57 [2024-09-15 18:49:20,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:49:20,368 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:20,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 78 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:49:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-15 18:49:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2024-09-15 18:49:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 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) [2024-09-15 18:49:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-09-15 18:49:20,387 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2024-09-15 18:49:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:20,389 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-09-15 18:49:20,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:20,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-09-15 18:49:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-15 18:49:20,393 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:20,393 INFO L216 NwaCegarLoop]: trace histogram [17, 15, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:20,405 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 18:49:20,593 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:20,594 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:20,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:20,594 INFO L85 PathProgramCache]: Analyzing trace with hash -361819703, now seen corresponding path program 4 times [2024-09-15 18:49:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:20,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441244864] [2024-09-15 18:49:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:20,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:20,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:49:20,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:20,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441244864] [2024-09-15 18:49:20,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441244864] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:20,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297622209] [2024-09-15 18:49:20,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:49:20,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:20,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:20,941 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) [2024-09-15 18:49:20,942 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:49:20,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:49:20,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:20,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-15 18:49:21,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:49:21,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:49:21,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297622209] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:21,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:21,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-09-15 18:49:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961275776] [2024-09-15 18:49:21,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:21,408 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-15 18:49:21,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-15 18:49:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-15 18:49:21,410 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:21,495 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2024-09-15 18:49:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-15 18:49:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2024-09-15 18:49:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:21,496 INFO L225 Difference]: With dead ends: 101 [2024-09-15 18:49:21,496 INFO L226 Difference]: Without dead ends: 85 [2024-09-15 18:49:21,497 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-15 18:49:21,498 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:21,498 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:49:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-15 18:49:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-09-15 18:49:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2024-09-15 18:49:21,508 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 50 [2024-09-15 18:49:21,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:21,508 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2024-09-15 18:49:21,508 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:21,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2024-09-15 18:49:21,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-15 18:49:21,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:21,510 INFO L216 NwaCegarLoop]: trace histogram [34, 32, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:21,526 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 18:49:21,710 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-15 18:49:21,711 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:21,712 INFO L85 PathProgramCache]: Analyzing trace with hash 715909110, now seen corresponding path program 5 times [2024-09-15 18:49:21,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:21,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669029570] [2024-09-15 18:49:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:22,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:49:22,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:22,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669029570] [2024-09-15 18:49:22,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669029570] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:22,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869673092] [2024-09-15 18:49:22,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:49:22,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:22,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:22,656 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) [2024-09-15 18:49:22,657 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:49:22,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2024-09-15 18:49:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:22,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-15 18:49:22,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:49:22,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:49:24,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869673092] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:24,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:24,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-15 18:49:24,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203586324] [2024-09-15 18:49:24,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:24,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-15 18:49:24,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-15 18:49:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-15 18:49:24,242 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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) [2024-09-15 18:49:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:24,405 INFO L93 Difference]: Finished difference Result 169 states and 209 transitions. [2024-09-15 18:49:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-15 18:49:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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 84 [2024-09-15 18:49:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:24,407 INFO L225 Difference]: With dead ends: 169 [2024-09-15 18:49:24,407 INFO L226 Difference]: Without dead ends: 153 [2024-09-15 18:49:24,409 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-15 18:49:24,409 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:24,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:49:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-15 18:49:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-09-15 18:49:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 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) [2024-09-15 18:49:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2024-09-15 18:49:24,424 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 84 [2024-09-15 18:49:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:24,424 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2024-09-15 18:49:24,424 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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) [2024-09-15 18:49:24,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2024-09-15 18:49:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-09-15 18:49:24,426 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:24,426 INFO L216 NwaCegarLoop]: trace histogram [68, 66, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:24,442 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 18:49:24,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:24,631 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:24,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 466944656, now seen corresponding path program 6 times [2024-09-15 18:49:24,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:24,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208098152] [2024-09-15 18:49:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:24,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:27,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:49:27,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208098152] [2024-09-15 18:49:27,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208098152] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828288116] [2024-09-15 18:49:27,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:49:27,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:27,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:27,646 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) [2024-09-15 18:49:27,648 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 18:49:27,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-15 18:49:27,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:27,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 18:49:27,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-09-15 18:49:28,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-09-15 18:49:28,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828288116] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:28,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:28,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 8, 8] total 81 [2024-09-15 18:49:28,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977722210] [2024-09-15 18:49:28,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:28,636 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-15 18:49:28,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-15 18:49:28,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2436, Invalid=4044, Unknown=0, NotChecked=0, Total=6480 [2024-09-15 18:49:28,639 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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) [2024-09-15 18:49:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:30,690 INFO L93 Difference]: Finished difference Result 184 states and 201 transitions. [2024-09-15 18:49:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-15 18:49:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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 152 [2024-09-15 18:49:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:30,692 INFO L225 Difference]: With dead ends: 184 [2024-09-15 18:49:30,692 INFO L226 Difference]: Without dead ends: 168 [2024-09-15 18:49:30,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3106 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7729, Invalid=14027, Unknown=0, NotChecked=0, Total=21756 [2024-09-15 18:49:30,697 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:30,697 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:49:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-09-15 18:49:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2024-09-15 18:49:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 157 states have internal predecessors, (161), 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) [2024-09-15 18:49:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2024-09-15 18:49:30,725 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 152 [2024-09-15 18:49:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:30,725 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2024-09-15 18:49:30,725 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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) [2024-09-15 18:49:30,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2024-09-15 18:49:30,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-09-15 18:49:30,727 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:30,727 INFO L216 NwaCegarLoop]: trace histogram [69, 67, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:30,740 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 18:49:30,931 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:30,932 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:30,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1364250420, now seen corresponding path program 7 times [2024-09-15 18:49:30,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:30,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89234885] [2024-09-15 18:49:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:30,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:33,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-15 18:49:33,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:33,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89234885] [2024-09-15 18:49:33,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89234885] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304739756] [2024-09-15 18:49:33,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:49:33,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:33,760 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) [2024-09-15 18:49:33,762 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 18:49:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:33,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-09-15 18:49:33,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-15 18:49:34,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-15 18:49:38,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304739756] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:38,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:38,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2024-09-15 18:49:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060295992] [2024-09-15 18:49:38,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:38,607 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-09-15 18:49:38,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-09-15 18:49:38,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-15 18:49:38,613 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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) [2024-09-15 18:49:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:38,964 INFO L93 Difference]: Finished difference Result 323 states and 398 transitions. [2024-09-15 18:49:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-09-15 18:49:38,964 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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 161 [2024-09-15 18:49:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:38,966 INFO L225 Difference]: With dead ends: 323 [2024-09-15 18:49:38,966 INFO L226 Difference]: Without dead ends: 300 [2024-09-15 18:49:38,967 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-15 18:49:38,967 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:38,968 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:49:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-09-15 18:49:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2024-09-15 18:49:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 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) [2024-09-15 18:49:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 303 transitions. [2024-09-15 18:49:38,991 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 303 transitions. Word has length 161 [2024-09-15 18:49:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:38,992 INFO L474 AbstractCegarLoop]: Abstraction has 300 states and 303 transitions. [2024-09-15 18:49:38,992 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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) [2024-09-15 18:49:38,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 303 transitions. [2024-09-15 18:49:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2024-09-15 18:49:38,995 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:38,995 INFO L216 NwaCegarLoop]: trace histogram [138, 136, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:39,009 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 18:49:39,199 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:39,200 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:39,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2052291453, now seen corresponding path program 8 times [2024-09-15 18:49:39,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:39,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795373888] [2024-09-15 18:49:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:39,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:51,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-15 18:49:51,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:51,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795373888] [2024-09-15 18:49:51,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795373888] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:51,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168575064] [2024-09-15 18:49:51,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:49:51,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:51,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:51,233 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:49:51,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 18:49:51,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:49:51,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:51,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 274 conjuncts are in the unsatisfiable core [2024-09-15 18:49:51,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-15 18:49:51,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:50:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-15 18:50:09,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168575064] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:50:09,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:50:09,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2024-09-15 18:50:09,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290825371] [2024-09-15 18:50:09,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:50:09,846 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2024-09-15 18:50:09,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:50:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2024-09-15 18:50:09,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-15 18:50:09,858 INFO L87 Difference]: Start difference. First operand 300 states and 303 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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) [2024-09-15 18:50:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:50:10,911 INFO L93 Difference]: Finished difference Result 599 states and 743 transitions. [2024-09-15 18:50:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-09-15 18:50:10,913 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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 299 [2024-09-15 18:50:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:50:10,916 INFO L225 Difference]: With dead ends: 599 [2024-09-15 18:50:10,916 INFO L226 Difference]: Without dead ends: 576 [2024-09-15 18:50:10,919 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-15 18:50:10,919 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:50:10,919 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:50:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-09-15 18:50:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2024-09-15 18:50:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 571 states have (on average 1.0070052539404553) internal successors, (575), 571 states have internal predecessors, (575), 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) [2024-09-15 18:50:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 579 transitions. [2024-09-15 18:50:10,963 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 579 transitions. Word has length 299 [2024-09-15 18:50:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:50:10,964 INFO L474 AbstractCegarLoop]: Abstraction has 576 states and 579 transitions. [2024-09-15 18:50:10,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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) [2024-09-15 18:50:10,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 579 transitions. [2024-09-15 18:50:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2024-09-15 18:50:10,971 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:50:10,971 INFO L216 NwaCegarLoop]: trace histogram [276, 274, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:50:10,989 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 18:50:11,175 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-15 18:50:11,176 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:50:11,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:11,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1416607007, now seen corresponding path program 9 times [2024-09-15 18:50:11,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:50:11,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109648299] [2024-09-15 18:50:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:50:11,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:50:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:11,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:51:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-15 18:51:11,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:51:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109648299] [2024-09-15 18:51:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109648299] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:51:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967478764] [2024-09-15 18:51:11,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:51:11,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:51:11,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:51:11,601 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:51:11,607 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 18:51:11,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-15 18:51:11,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:51:11,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-15 18:51:11,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:51:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2024-09-15 18:51:12,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:51:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2024-09-15 18:51:12,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967478764] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:51:12,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:51:12,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 5, 5] total 283 [2024-09-15 18:51:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091345302] [2024-09-15 18:51:12,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:51:12,831 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 283 states [2024-09-15 18:51:12,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:51:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 283 interpolants. [2024-09-15 18:51:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2024-09-15 18:51:12,844 INFO L87 Difference]: Start difference. First operand 576 states and 579 transitions. Second operand has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 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) [2024-09-15 18:51:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:51:14,324 INFO L93 Difference]: Finished difference Result 609 states and 624 transitions. [2024-09-15 18:51:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2024-09-15 18:51:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 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 575 [2024-09-15 18:51:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:51:14,331 INFO L225 Difference]: With dead ends: 609 [2024-09-15 18:51:14,331 INFO L226 Difference]: Without dead ends: 586 [2024-09-15 18:51:14,334 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1147 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2024-09-15 18:51:14,335 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:51:14,335 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:51:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2024-09-15 18:51:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2024-09-15 18:51:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 581 states have (on average 1.0137693631669535) internal successors, (589), 581 states have internal predecessors, (589), 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) [2024-09-15 18:51:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 593 transitions. [2024-09-15 18:51:14,377 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 593 transitions. Word has length 575 [2024-09-15 18:51:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:51:14,378 INFO L474 AbstractCegarLoop]: Abstraction has 586 states and 593 transitions. [2024-09-15 18:51:14,379 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 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) [2024-09-15 18:51:14,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 593 transitions. [2024-09-15 18:51:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2024-09-15 18:51:14,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:51:14,384 INFO L216 NwaCegarLoop]: trace histogram [281, 275, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:51:14,397 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 18:51:14,588 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 18:51:14,589 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:51:14,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:14,589 INFO L85 PathProgramCache]: Analyzing trace with hash 114891320, now seen corresponding path program 10 times [2024-09-15 18:51:14,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:51:14,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797571535] [2024-09-15 18:51:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:51:14,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:51:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:52:17,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:52:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:52:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-15 18:52:17,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:52:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797571535] [2024-09-15 18:52:17,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797571535] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:52:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351960963] [2024-09-15 18:52:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:52:17,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:52:17,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:52:17,838 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:52:17,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 18:52:18,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:52:18,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:52:18,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 552 conjuncts are in the unsatisfiable core [2024-09-15 18:52:18,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:52:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-15 18:52:18,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:53:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-15 18:53:27,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351960963] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:53:27,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:53:27,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2024-09-15 18:53:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516109078] [2024-09-15 18:53:27,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:53:27,888 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2024-09-15 18:53:27,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:53:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2024-09-15 18:53:27,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-15 18:53:27,917 INFO L87 Difference]: Start difference. First operand 586 states and 593 transitions. Second operand has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 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) [2024-09-15 18:53:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:53:36,287 INFO L93 Difference]: Finished difference Result 1171 states and 1462 transitions. [2024-09-15 18:53:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2024-09-15 18:53:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 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 585 [2024-09-15 18:53:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:53:36,292 INFO L225 Difference]: With dead ends: 1171 [2024-09-15 18:53:36,292 INFO L226 Difference]: Without dead ends: 1140 [2024-09-15 18:53:36,301 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1449 GetRequests, 896 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 91.2s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-15 18:53:36,302 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:53:36,302 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:53:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2024-09-15 18:53:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2024-09-15 18:53:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1135 states have (on average 1.0070484581497798) internal successors, (1143), 1135 states have internal predecessors, (1143), 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) [2024-09-15 18:53:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1147 transitions. [2024-09-15 18:53:36,388 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1147 transitions. Word has length 585 [2024-09-15 18:53:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:53:36,389 INFO L474 AbstractCegarLoop]: Abstraction has 1140 states and 1147 transitions. [2024-09-15 18:53:36,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 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) [2024-09-15 18:53:36,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:53:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1147 transitions. [2024-09-15 18:53:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2024-09-15 18:53:36,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:53:36,397 INFO L216 NwaCegarLoop]: trace histogram [558, 552, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:53:36,415 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 18:53:36,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 18:53:36,599 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:53:36,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:53:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash -313845513, now seen corresponding path program 11 times [2024-09-15 18:53:36,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:53:36,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704875270] [2024-09-15 18:53:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:53:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:53:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat