./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de42.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 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 22:00:13,219 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:00:13,299 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:00:13,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:00:13,307 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:00:13,340 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:00:13,341 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:00:13,341 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:00:13,342 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:00:13,344 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:00:13,344 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:00:13,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:00:13,345 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:00:13,346 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:00:13,346 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:00:13,347 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:00:13,347 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:00:13,347 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:00:13,348 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:00:13,348 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:00:13,348 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:00:13,350 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:00:13,350 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:00:13,351 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:00:13,351 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:00:13,351 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:00:13,351 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:00:13,352 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:00:13,352 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:00:13,352 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:00:13,353 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:00:13,353 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:00:13,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:00:13,354 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:00:13,354 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:00:13,362 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:00:13,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:00:13,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:00:13,364 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:00:13,364 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:00:13,364 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:00:13,364 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:00:13,365 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:00:13,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:00:13,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:00:13,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:00:13,640 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:00:13,640 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:00:13,641 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de42.c [2024-09-12 22:00:15,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:00:15,265 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:00:15,265 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de42.c [2024-09-12 22:00:15,271 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7947969cc/7da8c1300a7a44eda5ac1148a46ea31f/FLAGba874b23b [2024-09-12 22:00:15,656 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7947969cc/7da8c1300a7a44eda5ac1148a46ea31f [2024-09-12 22:00:15,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:00:15,659 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:00:15,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:00:15,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:00:15,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:00:15,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cee4e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15, skipping insertion in model container [2024-09-12 22:00:15,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,690 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:00:15,838 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2024-09-12 22:00:15,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:00:15,860 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:00:15,871 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2024-09-12 22:00:15,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:00:15,895 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:00:15,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15 WrapperNode [2024-09-12 22:00:15,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:00:15,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:00:15,899 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:00:15,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:00:15,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,918 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:00:15,918 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:00:15,919 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:00:15,919 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:00:15,919 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:00:15,929 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,931 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,946 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 22:00:15,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,947 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,949 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,953 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:00:15,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:00:15,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:00:15,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:00:15,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (1/1) ... [2024-09-12 22:00:15,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:00:15,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:15,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 22:00:15,990 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 22:00:16,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:00:16,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:00:16,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:00:16,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:00:16,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:00:16,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:00:16,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:00:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:00:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 22:00:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 22:00:16,090 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:00:16,092 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:00:16,228 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 22:00:16,228 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:00:16,252 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:00:16,253 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-12 22:00:16,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:00:16 BoogieIcfgContainer [2024-09-12 22:00:16,253 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:00:16,255 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:00:16,255 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:00:16,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:00:16,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:00:15" (1/3) ... [2024-09-12 22:00:16,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fca7942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:00:16, skipping insertion in model container [2024-09-12 22:00:16,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:00:15" (2/3) ... [2024-09-12 22:00:16,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fca7942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:00:16, skipping insertion in model container [2024-09-12 22:00:16,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:00:16" (3/3) ... [2024-09-12 22:00:16,261 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de42.c [2024-09-12 22:00:16,275 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:00:16,275 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 22:00:16,322 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:00:16,328 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;@4398c993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:00:16,328 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 22:00:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:00:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-12 22:00:16,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:16,338 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:16,339 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:16,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1769832604, now seen corresponding path program 1 times [2024-09-12 22:00:16,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:16,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208119359] [2024-09-12 22:00:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:16,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:16,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:16,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:16,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208119359] [2024-09-12 22:00:16,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208119359] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:00:16,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:00:16,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 22:00:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452382396] [2024-09-12 22:00:16,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:00:16,502 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 22:00:16,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 22:00:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:00:16,525 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:16,546 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-09-12 22:00:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 22:00:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 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 [2024-09-12 22:00:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:16,552 INFO L225 Difference]: With dead ends: 36 [2024-09-12 22:00:16,552 INFO L226 Difference]: Without dead ends: 15 [2024-09-12 22:00:16,554 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:00:16,557 INFO L434 NwaCegarLoop]: 22 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, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:16,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:00:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-12 22:00:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-12 22:00:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2024-09-12 22:00:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-09-12 22:00:16,586 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 14 [2024-09-12 22:00:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:16,587 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-09-12 22:00:16,587 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:16,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-09-12 22:00:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-12 22:00:16,588 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:16,589 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:16,589 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:00:16,589 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:16,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash 406021780, now seen corresponding path program 1 times [2024-09-12 22:00:16,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:16,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310365785] [2024-09-12 22:00:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:16,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:17,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:17,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:17,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310365785] [2024-09-12 22:00:17,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310365785] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:00:17,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:00:17,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-12 22:00:17,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712689367] [2024-09-12 22:00:17,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:00:17,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:00:17,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:17,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:00:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:00:17,361 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:17,483 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-09-12 22:00:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 22:00:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 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 [2024-09-12 22:00:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:17,485 INFO L225 Difference]: With dead ends: 31 [2024-09-12 22:00:17,485 INFO L226 Difference]: Without dead ends: 21 [2024-09-12 22:00:17,486 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:00:17,488 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:17,489 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 66 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:00:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-12 22:00:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-12 22:00:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2024-09-12 22:00:17,501 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 14 [2024-09-12 22:00:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:17,501 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2024-09-12 22:00:17,502 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:17,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2024-09-12 22:00:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 22:00:17,503 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:17,504 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:17,504 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 22:00:17,504 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:17,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:17,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1140139470, now seen corresponding path program 1 times [2024-09-12 22:00:17,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:17,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542254411] [2024-09-12 22:00:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:17,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:17,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:17,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542254411] [2024-09-12 22:00:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542254411] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:00:17,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:00:17,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:00:17,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273045442] [2024-09-12 22:00:17,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:00:17,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:00:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:17,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:00:17,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:00:17,582 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:17,603 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2024-09-12 22:00:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:00:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-12 22:00:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:17,605 INFO L225 Difference]: With dead ends: 30 [2024-09-12 22:00:17,606 INFO L226 Difference]: Without dead ends: 20 [2024-09-12 22:00:17,606 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:00:17,607 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:17,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:00:17,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-12 22:00:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-09-12 22:00:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-09-12 22:00:17,613 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2024-09-12 22:00:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:17,613 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-09-12 22:00:17,613 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:17,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-09-12 22:00:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 22:00:17,614 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:17,614 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:17,615 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 22:00:17,615 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:17,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:17,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1678146879, now seen corresponding path program 1 times [2024-09-12 22:00:17,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:17,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928704760] [2024-09-12 22:00:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:17,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:17,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:17,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:17,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928704760] [2024-09-12 22:00:17,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928704760] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:00:17,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:00:17,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 22:00:17,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113722533] [2024-09-12 22:00:17,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:00:17,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:00:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:00:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:00:17,676 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:17,702 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-09-12 22:00:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:00:17,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-12 22:00:17,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:17,704 INFO L225 Difference]: With dead ends: 26 [2024-09-12 22:00:17,704 INFO L226 Difference]: Without dead ends: 16 [2024-09-12 22:00:17,704 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:00:17,705 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:17,706 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:00:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-12 22:00:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-12 22:00:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-09-12 22:00:17,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 15 [2024-09-12 22:00:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:17,709 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-09-12 22:00:17,710 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:17,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-09-12 22:00:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 22:00:17,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:17,711 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:17,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-12 22:00:17,711 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:17,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash 739520928, now seen corresponding path program 1 times [2024-09-12 22:00:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:17,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322441132] [2024-09-12 22:00:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:17,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:17,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:17,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:17,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322441132] [2024-09-12 22:00:17,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322441132] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:17,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031132793] [2024-09-12 22:00:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:17,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:17,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:17,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:17,779 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:00:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:17,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 22:00:17,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:17,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:17,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031132793] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:17,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-12 22:00:17,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466360040] [2024-09-12 22:00:17,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:17,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:00:17,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:17,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:00:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:00:17,929 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:18,063 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2024-09-12 22:00:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:00:18,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-12 22:00:18,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:18,068 INFO L225 Difference]: With dead ends: 40 [2024-09-12 22:00:18,069 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 22:00:18,070 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:00:18,070 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:18,071 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 75 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:00:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 22:00:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2024-09-12 22:00:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-09-12 22:00:18,085 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2024-09-12 22:00:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:18,085 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-09-12 22:00:18,085 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:18,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-09-12 22:00:18,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 22:00:18,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:18,088 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:18,105 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 22:00:18,292 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:18,293 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:18,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash 291445903, now seen corresponding path program 1 times [2024-09-12 22:00:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:18,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616113861] [2024-09-12 22:00:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:18,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:00:18,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:18,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616113861] [2024-09-12 22:00:18,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616113861] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:18,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70720420] [2024-09-12 22:00:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:18,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:18,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:18,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:18,407 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:00:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:18,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:00:18,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:00:18,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:00:18,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70720420] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:18,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:18,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-12 22:00:18,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260757192] [2024-09-12 22:00:18,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:18,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:00:18,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:00:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:00:18,551 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:18,622 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2024-09-12 22:00:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 22:00:18,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-12 22:00:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:18,625 INFO L225 Difference]: With dead ends: 62 [2024-09-12 22:00:18,625 INFO L226 Difference]: Without dead ends: 56 [2024-09-12 22:00:18,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:00:18,626 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:18,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 54 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:00:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-12 22:00:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-09-12 22:00:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 71 transitions. [2024-09-12 22:00:18,650 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 71 transitions. Word has length 17 [2024-09-12 22:00:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:18,651 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 71 transitions. [2024-09-12 22:00:18,651 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:18,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 71 transitions. [2024-09-12 22:00:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 22:00:18,653 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:18,654 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:18,669 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 22:00:18,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 22:00:18,858 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:18,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:18,859 INFO L85 PathProgramCache]: Analyzing trace with hash 480426180, now seen corresponding path program 1 times [2024-09-12 22:00:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:18,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032566964] [2024-09-12 22:00:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:18,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:19,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:19,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032566964] [2024-09-12 22:00:19,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032566964] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369916071] [2024-09-12 22:00:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:19,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:19,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:19,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:00:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:19,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:00:19,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:19,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:19,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369916071] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:19,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:19,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-09-12 22:00:19,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754382493] [2024-09-12 22:00:19,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:19,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 22:00:19,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:19,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 22:00:19,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:00:19,886 INFO L87 Difference]: Start difference. First operand 50 states and 71 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:20,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:20,209 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2024-09-12 22:00:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 22:00:20,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-12 22:00:20,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:20,211 INFO L225 Difference]: With dead ends: 63 [2024-09-12 22:00:20,212 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 22:00:20,213 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2024-09-12 22:00:20,213 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:20,214 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 78 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:00:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 22:00:20,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-09-12 22:00:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 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) [2024-09-12 22:00:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2024-09-12 22:00:20,227 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 18 [2024-09-12 22:00:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:20,227 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2024-09-12 22:00:20,227 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:20,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2024-09-12 22:00:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 22:00:20,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:20,231 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:20,247 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 22:00:20,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 22:00:20,432 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:20,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1871956372, now seen corresponding path program 2 times [2024-09-12 22:00:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:20,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280345680] [2024-09-12 22:00:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:20,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:20,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:20,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:20,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280345680] [2024-09-12 22:00:20,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280345680] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:20,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29335959] [2024-09-12 22:00:20,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:00:20,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:20,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:20,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:20,516 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:00:20,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:00:20,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:20,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 22:00:20,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:20,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:20,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29335959] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:20,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:20,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-12 22:00:20,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687831609] [2024-09-12 22:00:20,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:20,668 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 22:00:20,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:20,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 22:00:20,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:00:20,669 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:21,229 INFO L93 Difference]: Finished difference Result 146 states and 250 transitions. [2024-09-12 22:00:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 22:00:21,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-12 22:00:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:21,231 INFO L225 Difference]: With dead ends: 146 [2024-09-12 22:00:21,231 INFO L226 Difference]: Without dead ends: 133 [2024-09-12 22:00:21,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2024-09-12 22:00:21,232 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 128 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:21,233 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 118 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:00:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-12 22:00:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2024-09-12 22:00:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 71 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions. [2024-09-12 22:00:21,259 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 18 [2024-09-12 22:00:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:21,260 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions. [2024-09-12 22:00:21,260 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:21,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions. [2024-09-12 22:00:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:00:21,263 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:21,263 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:21,279 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 22:00:21,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:21,464 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:21,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:21,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1849964308, now seen corresponding path program 2 times [2024-09-12 22:00:21,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:21,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778760004] [2024-09-12 22:00:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:21,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:21,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:00:21,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:21,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778760004] [2024-09-12 22:00:21,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778760004] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:21,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217999227] [2024-09-12 22:00:21,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:00:21,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:21,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:21,544 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:21,545 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:00:21,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:00:21,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:21,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:00:21,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:00:21,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:00:21,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217999227] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:21,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:21,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-12 22:00:21,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374774662] [2024-09-12 22:00:21,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:21,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 22:00:21,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:21,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 22:00:21,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:00:21,694 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2024-09-12 22:00:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:21,815 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2024-09-12 22:00:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 22:00:21,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 [2024-09-12 22:00:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:21,816 INFO L225 Difference]: With dead ends: 106 [2024-09-12 22:00:21,816 INFO L226 Difference]: Without dead ends: 88 [2024-09-12 22:00:21,817 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:00:21,817 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:21,818 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:00:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-12 22:00:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2024-09-12 22:00:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 67 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2024-09-12 22:00:21,838 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 20 [2024-09-12 22:00:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:21,838 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2024-09-12 22:00:21,838 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2024-09-12 22:00:21,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2024-09-12 22:00:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 22:00:21,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:21,839 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:21,856 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 22:00:22,042 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:22,043 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:22,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1048636735, now seen corresponding path program 3 times [2024-09-12 22:00:22,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:22,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433923024] [2024-09-12 22:00:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:22,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:22,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:00:22,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:22,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433923024] [2024-09-12 22:00:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433923024] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:22,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712787627] [2024-09-12 22:00:22,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:00:22,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:22,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:22,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:00:22,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 22:00:22,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:22,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 22:00:22,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:00:22,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:00:22,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712787627] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:22,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:22,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-12 22:00:22,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075727395] [2024-09-12 22:00:22,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:22,283 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 22:00:22,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:22,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 22:00:22,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:00:22,284 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:22,361 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2024-09-12 22:00:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 22:00:22,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-12 22:00:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:22,363 INFO L225 Difference]: With dead ends: 88 [2024-09-12 22:00:22,363 INFO L226 Difference]: Without dead ends: 83 [2024-09-12 22:00:22,363 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:00:22,363 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:22,364 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 58 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:00:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-12 22:00:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2024-09-12 22:00:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 75 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2024-09-12 22:00:22,390 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 21 [2024-09-12 22:00:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:22,390 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2024-09-12 22:00:22,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:22,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2024-09-12 22:00:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 22:00:22,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:22,391 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:22,409 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 22:00:22,592 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 22:00:22,592 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:22,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1816461804, now seen corresponding path program 4 times [2024-09-12 22:00:22,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:22,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831925209] [2024-09-12 22:00:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:22,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:23,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:23,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831925209] [2024-09-12 22:00:23,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831925209] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932447109] [2024-09-12 22:00:23,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:00:23,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:23,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:23,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:23,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:00:23,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:00:23,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:23,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 22:00:23,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:23,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:23,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932447109] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:23,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:23,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-09-12 22:00:23,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975622485] [2024-09-12 22:00:23,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:23,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:00:23,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:23,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:00:23,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:00:23,988 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:24,602 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2024-09-12 22:00:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 22:00:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-12 22:00:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:24,603 INFO L225 Difference]: With dead ends: 100 [2024-09-12 22:00:24,603 INFO L226 Difference]: Without dead ends: 86 [2024-09-12 22:00:24,604 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 22:00:24,605 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:24,605 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:00:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-12 22:00:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2024-09-12 22:00:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 77 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2024-09-12 22:00:24,634 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 22 [2024-09-12 22:00:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:24,635 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2024-09-12 22:00:24,635 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:24,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2024-09-12 22:00:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 22:00:24,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:24,636 INFO L216 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:24,650 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 22:00:24,836 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:24,837 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:24,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:24,837 INFO L85 PathProgramCache]: Analyzing trace with hash 924425156, now seen corresponding path program 5 times [2024-09-12 22:00:24,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:24,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063157035] [2024-09-12 22:00:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:24,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:24,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:00:24,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:24,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063157035] [2024-09-12 22:00:24,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063157035] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:24,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370130915] [2024-09-12 22:00:24,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:00:24,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:24,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:24,947 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 22:00:24,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 22:00:24,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:24,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 22:00:24,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:00:25,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:00:25,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370130915] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:25,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:25,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-09-12 22:00:25,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189216475] [2024-09-12 22:00:25,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:25,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 22:00:25,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 22:00:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-09-12 22:00:25,158 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:26,487 INFO L93 Difference]: Finished difference Result 200 states and 302 transitions. [2024-09-12 22:00:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-12 22:00:26,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-12 22:00:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:26,488 INFO L225 Difference]: With dead ends: 200 [2024-09-12 22:00:26,488 INFO L226 Difference]: Without dead ends: 177 [2024-09-12 22:00:26,490 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1061, Invalid=2845, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 22:00:26,490 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 171 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:26,490 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 165 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:00:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-12 22:00:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 104. [2024-09-12 22:00:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.3838383838383839) internal successors, (137), 99 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2024-09-12 22:00:26,519 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 22 [2024-09-12 22:00:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:26,519 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2024-09-12 22:00:26,519 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:26,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2024-09-12 22:00:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 22:00:26,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:26,520 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:26,533 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 22:00:26,723 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:26,724 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:26,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:26,724 INFO L85 PathProgramCache]: Analyzing trace with hash -440203297, now seen corresponding path program 6 times [2024-09-12 22:00:26,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:26,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920089989] [2024-09-12 22:00:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:26,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:26,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:00:26,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:26,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920089989] [2024-09-12 22:00:26,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920089989] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:26,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275972402] [2024-09-12 22:00:26,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:00:26,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:26,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:26,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:26,837 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 22:00:26,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-12 22:00:26,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:26,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 22:00:26,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:00:26,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:00:26,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275972402] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:26,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:26,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-12 22:00:26,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167511393] [2024-09-12 22:00:26,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:26,953 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 22:00:26,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 22:00:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:00:26,953 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2024-09-12 22:00:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:27,018 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2024-09-12 22:00:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 22:00:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 23 [2024-09-12 22:00:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:27,020 INFO L225 Difference]: With dead ends: 114 [2024-09-12 22:00:27,020 INFO L226 Difference]: Without dead ends: 98 [2024-09-12 22:00:27,020 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:00:27,020 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:27,021 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:00:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-12 22:00:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-09-12 22:00:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 91 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2024-09-12 22:00:27,049 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 23 [2024-09-12 22:00:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:27,050 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2024-09-12 22:00:27,050 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2024-09-12 22:00:27,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2024-09-12 22:00:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 22:00:27,051 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:27,051 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:27,067 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 22:00:27,252 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 22:00:27,252 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:27,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1071546110, now seen corresponding path program 7 times [2024-09-12 22:00:27,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:27,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721868945] [2024-09-12 22:00:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:27,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:00:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721868945] [2024-09-12 22:00:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721868945] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542403638] [2024-09-12 22:00:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:00:27,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:27,352 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:27,354 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 22:00:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:27,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:00:27,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:00:27,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:00:27,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542403638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:27,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:27,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2024-09-12 22:00:27,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108792031] [2024-09-12 22:00:27,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:27,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 22:00:27,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 22:00:27,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:00:27,562 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:27,781 INFO L93 Difference]: Finished difference Result 132 states and 178 transitions. [2024-09-12 22:00:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 22:00:27,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-12 22:00:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:27,783 INFO L225 Difference]: With dead ends: 132 [2024-09-12 22:00:27,783 INFO L226 Difference]: Without dead ends: 114 [2024-09-12 22:00:27,784 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:00:27,784 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:27,784 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 119 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:00:27,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-12 22:00:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2024-09-12 22:00:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.3863636363636365) internal successors, (122), 88 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2024-09-12 22:00:27,819 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 24 [2024-09-12 22:00:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:27,819 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2024-09-12 22:00:27,820 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:27,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2024-09-12 22:00:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 22:00:27,820 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:27,821 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:27,837 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 22:00:28,021 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 22:00:28,021 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:28,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1610157924, now seen corresponding path program 8 times [2024-09-12 22:00:28,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:28,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280135006] [2024-09-12 22:00:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:28,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:28,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:00:28,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280135006] [2024-09-12 22:00:28,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280135006] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023508724] [2024-09-12 22:00:28,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:00:28,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:28,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:28,160 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:28,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 22:00:28,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:00:28,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:28,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 22:00:28,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:00:28,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:00:28,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023508724] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:28,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:28,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 16 [2024-09-12 22:00:28,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433228675] [2024-09-12 22:00:28,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:28,350 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 22:00:28,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:28,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 22:00:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2024-09-12 22:00:28,351 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:35,114 WARN L293 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 29 DAG size of output: 22 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:00:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:36,647 INFO L93 Difference]: Finished difference Result 194 states and 282 transitions. [2024-09-12 22:00:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 22:00:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-12 22:00:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:36,649 INFO L225 Difference]: With dead ends: 194 [2024-09-12 22:00:36,649 INFO L226 Difference]: Without dead ends: 188 [2024-09-12 22:00:36,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2024-09-12 22:00:36,650 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:36,650 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 134 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:00:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-09-12 22:00:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2024-09-12 22:00:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2024-09-12 22:00:36,701 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 24 [2024-09-12 22:00:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:36,701 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2024-09-12 22:00:36,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:36,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2024-09-12 22:00:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 22:00:36,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:36,702 INFO L216 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:36,715 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 22:00:36,903 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 22:00:36,903 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:36,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:36,904 INFO L85 PathProgramCache]: Analyzing trace with hash -37619168, now seen corresponding path program 3 times [2024-09-12 22:00:36,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:36,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502934493] [2024-09-12 22:00:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:36,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:37,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:37,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502934493] [2024-09-12 22:00:37,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502934493] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111976563] [2024-09-12 22:00:37,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:00:37,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:37,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:37,109 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 22:00:37,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 22:00:37,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:37,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-12 22:00:37,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:37,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:37,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111976563] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:37,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:37,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-12 22:00:37,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392025908] [2024-09-12 22:00:37,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:37,467 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-12 22:00:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-12 22:00:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-09-12 22:00:37,468 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:41,103 INFO L93 Difference]: Finished difference Result 602 states and 981 transitions. [2024-09-12 22:00:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-12 22:00:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-12 22:00:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:41,106 INFO L225 Difference]: With dead ends: 602 [2024-09-12 22:00:41,106 INFO L226 Difference]: Without dead ends: 563 [2024-09-12 22:00:41,108 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1575, Invalid=3537, Unknown=0, NotChecked=0, Total=5112 [2024-09-12 22:00:41,108 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 673 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:41,109 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 376 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 22:00:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2024-09-12 22:00:41,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 227. [2024-09-12 22:00:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2024-09-12 22:00:41,208 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 25 [2024-09-12 22:00:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:41,208 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2024-09-12 22:00:41,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:41,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2024-09-12 22:00:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 22:00:41,209 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:41,209 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:41,223 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 22:00:41,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 22:00:41,410 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:41,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:41,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1984219964, now seen corresponding path program 9 times [2024-09-12 22:00:41,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:41,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221893723] [2024-09-12 22:00:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:41,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:41,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:41,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:41,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221893723] [2024-09-12 22:00:41,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221893723] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:41,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162462521] [2024-09-12 22:00:41,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:00:41,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:41,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:41,769 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:41,770 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 22:00:41,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:00:41,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:41,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 22:00:41,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:42,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:42,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162462521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:42,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:42,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 35 [2024-09-12 22:00:42,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429888234] [2024-09-12 22:00:42,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:42,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-12 22:00:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-12 22:00:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 22:00:42,677 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:43,429 INFO L93 Difference]: Finished difference Result 262 states and 371 transitions. [2024-09-12 22:00:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 22:00:43,429 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-12 22:00:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:43,430 INFO L225 Difference]: With dead ends: 262 [2024-09-12 22:00:43,430 INFO L226 Difference]: Without dead ends: 218 [2024-09-12 22:00:43,431 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 22:00:43,432 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:43,432 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 186 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:00:43,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-12 22:00:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2024-09-12 22:00:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.4834123222748816) internal successors, (313), 211 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 317 transitions. [2024-09-12 22:00:43,534 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 317 transitions. Word has length 26 [2024-09-12 22:00:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:43,535 INFO L474 AbstractCegarLoop]: Abstraction has 216 states and 317 transitions. [2024-09-12 22:00:43,535 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:43,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 317 transitions. [2024-09-12 22:00:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-12 22:00:43,536 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:43,536 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:43,551 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-12 22:00:43,740 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 22:00:43,741 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:43,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:43,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1102483756, now seen corresponding path program 10 times [2024-09-12 22:00:43,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:43,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530252526] [2024-09-12 22:00:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:43,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:43,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:00:43,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:43,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530252526] [2024-09-12 22:00:43,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530252526] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:43,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863527121] [2024-09-12 22:00:43,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:00:43,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:43,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:43,871 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:43,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 22:00:43,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:00:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:43,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 22:00:43,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:00:43,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:00:44,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863527121] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:44,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:44,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2024-09-12 22:00:44,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212497179] [2024-09-12 22:00:44,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:44,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 22:00:44,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:44,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 22:00:44,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-09-12 22:00:44,113 INFO L87 Difference]: Start difference. First operand 216 states and 317 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:44,474 INFO L93 Difference]: Finished difference Result 307 states and 420 transitions. [2024-09-12 22:00:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 22:00:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-12 22:00:44,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:44,476 INFO L225 Difference]: With dead ends: 307 [2024-09-12 22:00:44,476 INFO L226 Difference]: Without dead ends: 256 [2024-09-12 22:00:44,477 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2024-09-12 22:00:44,477 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:44,478 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 141 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:00:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-09-12 22:00:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 206. [2024-09-12 22:00:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.4527363184079602) internal successors, (292), 201 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 296 transitions. [2024-09-12 22:00:44,566 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 296 transitions. Word has length 28 [2024-09-12 22:00:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:44,566 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 296 transitions. [2024-09-12 22:00:44,566 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:44,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 296 transitions. [2024-09-12 22:00:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 22:00:44,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:44,567 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:44,580 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 22:00:44,767 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-12 22:00:44,768 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:44,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1450211905, now seen corresponding path program 11 times [2024-09-12 22:00:44,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:44,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310724262] [2024-09-12 22:00:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:44,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:44,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:00:44,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:44,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310724262] [2024-09-12 22:00:44,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310724262] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:44,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668727353] [2024-09-12 22:00:44,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:00:44,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:44,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:44,907 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:44,910 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 22:00:44,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 22:00:44,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:44,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 22:00:44,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:00:45,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:00:45,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668727353] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:45,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:45,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-12 22:00:45,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277299204] [2024-09-12 22:00:45,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:45,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 22:00:45,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:45,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 22:00:45,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:00:45,120 INFO L87 Difference]: Start difference. First operand 206 states and 296 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:45,426 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2024-09-12 22:00:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 22:00:45,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-12 22:00:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:45,428 INFO L225 Difference]: With dead ends: 236 [2024-09-12 22:00:45,428 INFO L226 Difference]: Without dead ends: 231 [2024-09-12 22:00:45,429 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:00:45,429 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:45,429 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:00:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-09-12 22:00:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 221. [2024-09-12 22:00:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4259259259259258) internal successors, (308), 216 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 312 transitions. [2024-09-12 22:00:45,556 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 312 transitions. Word has length 29 [2024-09-12 22:00:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:45,556 INFO L474 AbstractCegarLoop]: Abstraction has 221 states and 312 transitions. [2024-09-12 22:00:45,556 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:45,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 312 transitions. [2024-09-12 22:00:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 22:00:45,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:45,557 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:45,576 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 22:00:45,761 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:45,761 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:45,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1436244400, now seen corresponding path program 12 times [2024-09-12 22:00:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060534475] [2024-09-12 22:00:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:45,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:00:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060534475] [2024-09-12 22:00:45,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060534475] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:45,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847177504] [2024-09-12 22:00:45,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:00:45,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:45,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:45,997 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:45,998 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 22:00:46,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 22:00:46,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:00:46,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-12 22:00:46,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:00:46,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:00:46,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847177504] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:46,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:46,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-12 22:00:46,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009163376] [2024-09-12 22:00:46,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:46,541 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 22:00:46,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 22:00:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 22:00:46,542 INFO L87 Difference]: Start difference. First operand 221 states and 312 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:00:55,896 INFO L93 Difference]: Finished difference Result 703 states and 1080 transitions. [2024-09-12 22:00:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-09-12 22:00:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-12 22:00:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:00:55,899 INFO L225 Difference]: With dead ends: 703 [2024-09-12 22:00:55,900 INFO L226 Difference]: Without dead ends: 674 [2024-09-12 22:00:55,903 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6639 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=4904, Invalid=12918, Unknown=0, NotChecked=0, Total=17822 [2024-09-12 22:00:55,904 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 893 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:00:55,904 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 452 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-12 22:00:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2024-09-12 22:00:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 259. [2024-09-12 22:00:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.4448818897637796) internal successors, (367), 254 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2024-09-12 22:00:56,053 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 29 [2024-09-12 22:00:56,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:00:56,054 INFO L474 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2024-09-12 22:00:56,054 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:00:56,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2024-09-12 22:00:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 22:00:56,055 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:00:56,055 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:00:56,071 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 22:00:56,259 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:56,259 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:00:56,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:00:56,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1971358316, now seen corresponding path program 13 times [2024-09-12 22:00:56,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:00:56,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403185177] [2024-09-12 22:00:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:00:56,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:00:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:56,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:00:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:56,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:00:56,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403185177] [2024-09-12 22:00:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403185177] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:00:56,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322671669] [2024-09-12 22:00:56,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:00:56,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:00:56,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:00:56,763 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:00:56,766 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 22:00:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:00:56,842 WARN L260 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-12 22:00:56,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:00:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:57,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:00:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:00:58,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322671669] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:00:58,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:00:58,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 58 [2024-09-12 22:00:58,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366303859] [2024-09-12 22:00:58,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:00:58,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-12 22:00:58,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:00:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-12 22:00:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 22:00:58,676 INFO L87 Difference]: Start difference. First operand 259 states and 371 transitions. Second operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:01:02,975 INFO L93 Difference]: Finished difference Result 301 states and 420 transitions. [2024-09-12 22:01:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-12 22:01:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-12 22:01:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:01:02,977 INFO L225 Difference]: With dead ends: 301 [2024-09-12 22:01:02,977 INFO L226 Difference]: Without dead ends: 275 [2024-09-12 22:01:02,978 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=776, Invalid=6880, Unknown=0, NotChecked=0, Total=7656 [2024-09-12 22:01:02,979 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 22:01:02,979 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 362 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 22:01:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-09-12 22:01:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 265. [2024-09-12 22:01:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.4230769230769231) internal successors, (370), 260 states have internal predecessors, (370), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 374 transitions. [2024-09-12 22:01:03,134 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 374 transitions. Word has length 30 [2024-09-12 22:01:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:01:03,134 INFO L474 AbstractCegarLoop]: Abstraction has 265 states and 374 transitions. [2024-09-12 22:01:03,135 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:03,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 374 transitions. [2024-09-12 22:01:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 22:01:03,136 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:01:03,136 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:01:03,151 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-12 22:01:03,336 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:01:03,337 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:01:03,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:03,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1763617342, now seen corresponding path program 14 times [2024-09-12 22:01:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:01:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563285258] [2024-09-12 22:01:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:01:03,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:01:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:03,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:01:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 22:01:03,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:01:03,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563285258] [2024-09-12 22:01:03,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563285258] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:01:03,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411124704] [2024-09-12 22:01:03,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:01:03,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:01:03,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:01:03,503 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:01:03,505 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 22:01:03,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:01:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:01:03,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 22:01:03,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:01:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 22:01:03,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:01:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 22:01:03,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411124704] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:01:03,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:01:03,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2024-09-12 22:01:03,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859650257] [2024-09-12 22:01:03,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:01:03,806 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 22:01:03,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:01:03,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 22:01:03,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2024-09-12 22:01:03,807 INFO L87 Difference]: Start difference. First operand 265 states and 374 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:01:04,687 INFO L93 Difference]: Finished difference Result 378 states and 503 transitions. [2024-09-12 22:01:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 22:01:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-12 22:01:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:01:04,692 INFO L225 Difference]: With dead ends: 378 [2024-09-12 22:01:04,692 INFO L226 Difference]: Without dead ends: 305 [2024-09-12 22:01:04,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 22:01:04,694 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:01:04,694 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 230 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:01:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-12 22:01:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 254. [2024-09-12 22:01:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.3895582329317269) internal successors, (346), 249 states have internal predecessors, (346), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 350 transitions. [2024-09-12 22:01:04,828 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 350 transitions. Word has length 32 [2024-09-12 22:01:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:01:04,829 INFO L474 AbstractCegarLoop]: Abstraction has 254 states and 350 transitions. [2024-09-12 22:01:04,829 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:04,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 350 transitions. [2024-09-12 22:01:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 22:01:04,830 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:01:04,830 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:01:04,843 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 22:01:05,030 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-12 22:01:05,031 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:01:05,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash 721021796, now seen corresponding path program 15 times [2024-09-12 22:01:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:01:05,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215599985] [2024-09-12 22:01:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:01:05,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:01:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:05,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:01:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:01:05,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:01:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215599985] [2024-09-12 22:01:05,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215599985] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:01:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540750684] [2024-09-12 22:01:05,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:01:05,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:01:05,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:01:05,289 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:01:05,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 22:01:05,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:01:05,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:01:05,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 22:01:05,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:01:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:01:05,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:01:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:01:05,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540750684] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:01:05,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:01:05,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2024-09-12 22:01:05,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744786266] [2024-09-12 22:01:05,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:01:05,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 22:01:05,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:01:05,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 22:01:05,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:01:05,532 INFO L87 Difference]: Start difference. First operand 254 states and 350 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:09,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:01:17,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:01:25,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:01:26,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:01:26,079 INFO L93 Difference]: Finished difference Result 321 states and 429 transitions. [2024-09-12 22:01:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 22:01:26,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-12 22:01:26,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:01:26,081 INFO L225 Difference]: With dead ends: 321 [2024-09-12 22:01:26,081 INFO L226 Difference]: Without dead ends: 316 [2024-09-12 22:01:26,082 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=228, Invalid=762, Unknown=2, NotChecked=0, Total=992 [2024-09-12 22:01:26,082 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:01:26,083 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 167 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 189 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2024-09-12 22:01:26,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-12 22:01:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 268. [2024-09-12 22:01:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.3802281368821292) internal successors, (363), 263 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 367 transitions. [2024-09-12 22:01:26,246 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 367 transitions. Word has length 32 [2024-09-12 22:01:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:01:26,246 INFO L474 AbstractCegarLoop]: Abstraction has 268 states and 367 transitions. [2024-09-12 22:01:26,246 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:26,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 367 transitions. [2024-09-12 22:01:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 22:01:26,247 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:01:26,247 INFO L216 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:01:26,265 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-12 22:01:26,447 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-12 22:01:26,448 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:01:26,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1819493792, now seen corresponding path program 16 times [2024-09-12 22:01:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:01:26,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603963639] [2024-09-12 22:01:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:01:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:01:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:26,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:01:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:01:26,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:01:26,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603963639] [2024-09-12 22:01:26,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603963639] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:01:26,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027124249] [2024-09-12 22:01:26,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:01:26,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:01:26,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:01:26,740 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:01:26,742 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 22:01:26,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:01:26,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:01:26,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 22:01:26,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:01:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:01:26,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:01:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:01:27,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027124249] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:01:27,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:01:27,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-12 22:01:27,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999902594] [2024-09-12 22:01:27,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:01:27,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 22:01:27,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:01:27,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 22:01:27,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 22:01:27,220 INFO L87 Difference]: Start difference. First operand 268 states and 367 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:01:44,784 INFO L93 Difference]: Finished difference Result 859 states and 1231 transitions. [2024-09-12 22:01:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2024-09-12 22:01:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-12 22:01:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:01:44,787 INFO L225 Difference]: With dead ends: 859 [2024-09-12 22:01:44,788 INFO L226 Difference]: Without dead ends: 818 [2024-09-12 22:01:44,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15077 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=9059, Invalid=28771, Unknown=0, NotChecked=0, Total=37830 [2024-09-12 22:01:44,802 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 1269 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:01:44,802 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 575 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-12 22:01:44,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2024-09-12 22:01:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 310. [2024-09-12 22:01:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.4032786885245903) internal successors, (428), 305 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 432 transitions. [2024-09-12 22:01:45,039 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 432 transitions. Word has length 33 [2024-09-12 22:01:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:01:45,039 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 432 transitions. [2024-09-12 22:01:45,040 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:45,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 432 transitions. [2024-09-12 22:01:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 22:01:45,041 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:01:45,041 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:01:45,057 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-12 22:01:45,241 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-12 22:01:45,241 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:01:45,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1745547068, now seen corresponding path program 17 times [2024-09-12 22:01:45,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:01:45,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217257604] [2024-09-12 22:01:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:01:45,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:01:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:45,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:01:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:01:45,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:01:45,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217257604] [2024-09-12 22:01:45,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217257604] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:01:45,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021050010] [2024-09-12 22:01:45,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:01:45,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:01:45,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:01:45,818 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:01:45,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 22:01:45,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 22:01:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:01:45,919 WARN L260 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-12 22:01:45,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:01:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:01:46,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:01:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:01:48,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021050010] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:01:48,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:01:48,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 27] total 70 [2024-09-12 22:01:48,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350283106] [2024-09-12 22:01:48,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:01:48,462 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-09-12 22:01:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:01:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-09-12 22:01:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=4315, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 22:01:48,463 INFO L87 Difference]: Start difference. First operand 310 states and 432 transitions. Second operand has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:01:51,465 INFO L93 Difference]: Finished difference Result 355 states and 480 transitions. [2024-09-12 22:01:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-12 22:01:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-12 22:01:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:01:51,467 INFO L225 Difference]: With dead ends: 355 [2024-09-12 22:01:51,467 INFO L226 Difference]: Without dead ends: 316 [2024-09-12 22:01:51,468 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1195, Invalid=7735, Unknown=0, NotChecked=0, Total=8930 [2024-09-12 22:01:51,468 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 22:01:51,468 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 352 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 22:01:51,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-12 22:01:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 306. [2024-09-12 22:01:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.398671096345515) internal successors, (421), 301 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 425 transitions. [2024-09-12 22:01:51,709 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 425 transitions. Word has length 34 [2024-09-12 22:01:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:01:51,709 INFO L474 AbstractCegarLoop]: Abstraction has 306 states and 425 transitions. [2024-09-12 22:01:51,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 68 states have internal predecessors, (83), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:01:51,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 425 transitions. [2024-09-12 22:01:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 22:01:51,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:01:51,710 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:01:51,724 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-12 22:01:51,911 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-12 22:01:51,911 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:01:51,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:01:51,911 INFO L85 PathProgramCache]: Analyzing trace with hash -746719660, now seen corresponding path program 2 times [2024-09-12 22:01:51,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:01:51,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982134419] [2024-09-12 22:01:51,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:01:51,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:01:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:52,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:01:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:01:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 22:01:52,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:01:52,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982134419] [2024-09-12 22:01:52,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982134419] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:01:52,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264745808] [2024-09-12 22:01:52,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:01:52,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:01:52,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:01:52,116 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:01:52,121 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 22:01:52,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:01:52,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:01:52,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 22:01:52,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:01:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:01:52,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:01:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:01:52,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264745808] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:01:52,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:01:52,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 34 [2024-09-12 22:01:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129608831] [2024-09-12 22:01:52,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:01:52,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 22:01:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:01:52,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 22:01:52,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 22:01:52,609 INFO L87 Difference]: Start difference. First operand 306 states and 425 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:02:01,408 INFO L93 Difference]: Finished difference Result 565 states and 748 transitions. [2024-09-12 22:02:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2024-09-12 22:02:01,409 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-12 22:02:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:02:01,410 INFO L225 Difference]: With dead ends: 565 [2024-09-12 22:02:01,410 INFO L226 Difference]: Without dead ends: 503 [2024-09-12 22:02:01,412 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9193 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3614, Invalid=24442, Unknown=0, NotChecked=0, Total=28056 [2024-09-12 22:02:01,413 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 431 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:02:01,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 333 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-12 22:02:01,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2024-09-12 22:02:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 298. [2024-09-12 22:02:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.3242320819112627) internal successors, (388), 293 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 392 transitions. [2024-09-12 22:02:01,659 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 392 transitions. Word has length 34 [2024-09-12 22:02:01,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:02:01,659 INFO L474 AbstractCegarLoop]: Abstraction has 298 states and 392 transitions. [2024-09-12 22:02:01,659 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:01,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:02:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 392 transitions. [2024-09-12 22:02:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 22:02:01,660 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:02:01,661 INFO L216 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:02:01,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-12 22:02:01,864 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-12 22:02:01,865 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:02:01,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:02:01,865 INFO L85 PathProgramCache]: Analyzing trace with hash 667351476, now seen corresponding path program 18 times [2024-09-12 22:02:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:02:01,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912523139] [2024-09-12 22:02:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:02:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:02:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:02:01,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:02:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:02:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 22:02:01,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:02:01,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912523139] [2024-09-12 22:02:01,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912523139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:02:01,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862684067] [2024-09-12 22:02:01,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:02:01,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:02:01,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:02:02,000 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:02:02,002 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 22:02:02,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-12 22:02:02,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:02:02,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:02:02,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:02:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 22:02:02,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:02:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 22:02:02,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862684067] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:02:02,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:02:02,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-12 22:02:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865692003] [2024-09-12 22:02:02,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:02:02,205 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 22:02:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:02:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 22:02:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:02:02,206 INFO L87 Difference]: Start difference. First operand 298 states and 392 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:02:02,510 INFO L93 Difference]: Finished difference Result 311 states and 406 transitions. [2024-09-12 22:02:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 22:02:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-12 22:02:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:02:02,511 INFO L225 Difference]: With dead ends: 311 [2024-09-12 22:02:02,511 INFO L226 Difference]: Without dead ends: 284 [2024-09-12 22:02:02,512 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 13 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:02:02,512 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:02:02,512 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:02:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-09-12 22:02:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 280. [2024-09-12 22:02:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.3418181818181818) internal successors, (369), 275 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 373 transitions. [2024-09-12 22:02:02,833 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 373 transitions. Word has length 36 [2024-09-12 22:02:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:02:02,833 INFO L474 AbstractCegarLoop]: Abstraction has 280 states and 373 transitions. [2024-09-12 22:02:02,833 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:02,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:02:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 373 transitions. [2024-09-12 22:02:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 22:02:02,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:02:02,834 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:02:02,847 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-12 22:02:03,034 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-12 22:02:03,035 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:02:03,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:02:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1937474636, now seen corresponding path program 19 times [2024-09-12 22:02:03,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:02:03,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090002615] [2024-09-12 22:02:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:02:03,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:02:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:02:03,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:02:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:02:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:02:03,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:02:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090002615] [2024-09-12 22:02:03,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090002615] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:02:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176833044] [2024-09-12 22:02:03,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:02:03,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:02:03,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:02:03,350 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:02:03,351 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 22:02:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:02:03,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 22:02:03,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:02:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-12 22:02:03,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:02:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-12 22:02:03,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176833044] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:02:03,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:02:03,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2024-09-12 22:02:03,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087991380] [2024-09-12 22:02:03,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:02:03,555 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 22:02:03,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:02:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 22:02:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:02:03,556 INFO L87 Difference]: Start difference. First operand 280 states and 373 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:08,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:02:16,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:02:24,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:02:32,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:02:36,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:02:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:02:36,540 INFO L93 Difference]: Finished difference Result 405 states and 548 transitions. [2024-09-12 22:02:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-12 22:02:36,540 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-12 22:02:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:02:36,542 INFO L225 Difference]: With dead ends: 405 [2024-09-12 22:02:36,542 INFO L226 Difference]: Without dead ends: 400 [2024-09-12 22:02:36,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=399, Invalid=1490, Unknown=3, NotChecked=0, Total=1892 [2024-09-12 22:02:36,543 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 49 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:02:36,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 218 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 258 Invalid, 5 Unknown, 0 Unchecked, 20.2s Time] [2024-09-12 22:02:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-09-12 22:02:36,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 351. [2024-09-12 22:02:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.3757225433526012) internal successors, (476), 346 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 480 transitions. [2024-09-12 22:02:36,844 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 480 transitions. Word has length 36 [2024-09-12 22:02:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:02:36,844 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 480 transitions. [2024-09-12 22:02:36,844 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:36,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:02:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 480 transitions. [2024-09-12 22:02:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 22:02:36,845 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:02:36,845 INFO L216 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:02:36,862 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-12 22:02:37,046 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-12 22:02:37,046 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:02:37,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:02:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1719779569, now seen corresponding path program 3 times [2024-09-12 22:02:37,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:02:37,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542628221] [2024-09-12 22:02:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:02:37,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:02:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:02:37,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:02:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:02:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-12 22:02:37,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:02:37,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542628221] [2024-09-12 22:02:37,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542628221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:02:37,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832057543] [2024-09-12 22:02:37,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:02:37,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:02:37,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:02:37,263 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:02:37,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-12 22:02:37,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 22:02:37,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:02:37,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-12 22:02:37,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:02:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-12 22:02:37,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:02:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-12 22:02:38,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832057543] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:02:38,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:02:38,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2024-09-12 22:02:38,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592807553] [2024-09-12 22:02:38,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:02:38,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 22:02:38,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:02:38,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 22:02:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 22:02:38,049 INFO L87 Difference]: Start difference. First operand 351 states and 480 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:40,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:02:40,408 INFO L93 Difference]: Finished difference Result 693 states and 928 transitions. [2024-09-12 22:02:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-12 22:02:40,409 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-12 22:02:40,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:02:40,411 INFO L225 Difference]: With dead ends: 693 [2024-09-12 22:02:40,411 INFO L226 Difference]: Without dead ends: 644 [2024-09-12 22:02:40,412 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1593, Invalid=6239, Unknown=0, NotChecked=0, Total=7832 [2024-09-12 22:02:40,412 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 196 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:02:40,412 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 303 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:02:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2024-09-12 22:02:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 468. [2024-09-12 22:02:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 463 states have (on average 1.4470842332613392) internal successors, (670), 463 states have internal predecessors, (670), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 674 transitions. [2024-09-12 22:02:40,881 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 674 transitions. Word has length 37 [2024-09-12 22:02:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:02:40,882 INFO L474 AbstractCegarLoop]: Abstraction has 468 states and 674 transitions. [2024-09-12 22:02:40,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:02:40,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:02:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 674 transitions. [2024-09-12 22:02:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 22:02:40,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:02:40,883 INFO L216 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:02:40,895 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-12 22:02:41,083 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-12 22:02:41,083 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:02:41,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:02:41,084 INFO L85 PathProgramCache]: Analyzing trace with hash 917296720, now seen corresponding path program 20 times [2024-09-12 22:02:41,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:02:41,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708963317] [2024-09-12 22:02:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:02:41,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:02:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:02:41,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:02:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:02:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:02:41,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:02:41,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708963317] [2024-09-12 22:02:41,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708963317] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:02:41,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110377338] [2024-09-12 22:02:41,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:02:41,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:02:41,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:02:41,372 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:02:41,373 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-12 22:02:41,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:02:41,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:02:41,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 22:02:41,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:02:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:02:41,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:02:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:02:41,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110377338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:02:41,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:02:41,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-12 22:02:41,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193625648] [2024-09-12 22:02:41,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:02:41,939 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-12 22:02:41,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:02:41,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-12 22:02:41,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 22:02:41,940 INFO L87 Difference]: Start difference. First operand 468 states and 674 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:03:12,638 INFO L93 Difference]: Finished difference Result 1360 states and 1994 transitions. [2024-09-12 22:03:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2024-09-12 22:03:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-12 22:03:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:03:12,642 INFO L225 Difference]: With dead ends: 1360 [2024-09-12 22:03:12,642 INFO L226 Difference]: Without dead ends: 1263 [2024-09-12 22:03:12,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24922 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=13370, Invalid=47886, Unknown=0, NotChecked=0, Total=61256 [2024-09-12 22:03:12,645 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 1704 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:03:12,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 569 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-12 22:03:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2024-09-12 22:03:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 482. [2024-09-12 22:03:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 477 states have (on average 1.450733752620545) internal successors, (692), 477 states have internal predecessors, (692), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 696 transitions. [2024-09-12 22:03:13,283 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 696 transitions. Word has length 37 [2024-09-12 22:03:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:03:13,284 INFO L474 AbstractCegarLoop]: Abstraction has 482 states and 696 transitions. [2024-09-12 22:03:13,284 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:13,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 696 transitions. [2024-09-12 22:03:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 22:03:13,285 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:03:13,285 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:03:13,302 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-12 22:03:13,485 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:03:13,486 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:03:13,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1055077100, now seen corresponding path program 21 times [2024-09-12 22:03:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:03:13,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864859109] [2024-09-12 22:03:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:03:13,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:03:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:14,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:03:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:03:14,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:03:14,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864859109] [2024-09-12 22:03:14,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864859109] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:03:14,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156950545] [2024-09-12 22:03:14,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:03:14,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:03:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:03:14,235 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:03:14,236 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-12 22:03:14,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:03:14,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:03:14,357 WARN L260 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-09-12 22:03:14,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:03:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:03:15,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:03:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:03:17,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156950545] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:03:17,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:03:17,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32, 31] total 81 [2024-09-12 22:03:17,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197493479] [2024-09-12 22:03:17,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:03:17,506 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-12 22:03:17,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:03:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-12 22:03:17,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=5805, Unknown=0, NotChecked=0, Total=6480 [2024-09-12 22:03:17,507 INFO L87 Difference]: Start difference. First operand 482 states and 696 transitions. Second operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 79 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:03:21,740 INFO L93 Difference]: Finished difference Result 543 states and 764 transitions. [2024-09-12 22:03:21,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-12 22:03:21,740 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.1875) internal successors, (95), 79 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-12 22:03:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:03:21,742 INFO L225 Difference]: With dead ends: 543 [2024-09-12 22:03:21,742 INFO L226 Difference]: Without dead ends: 512 [2024-09-12 22:03:21,743 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1628, Invalid=10582, Unknown=0, NotChecked=0, Total=12210 [2024-09-12 22:03:21,743 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 151 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:03:21,743 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 357 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 22:03:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2024-09-12 22:03:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 500. [2024-09-12 22:03:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 495 states have (on average 1.4404040404040404) internal successors, (713), 495 states have internal predecessors, (713), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 717 transitions. [2024-09-12 22:03:22,315 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 717 transitions. Word has length 38 [2024-09-12 22:03:22,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:03:22,315 INFO L474 AbstractCegarLoop]: Abstraction has 500 states and 717 transitions. [2024-09-12 22:03:22,315 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 1.1875) internal successors, (95), 79 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:22,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 717 transitions. [2024-09-12 22:03:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 22:03:22,317 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:03:22,317 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:03:22,330 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-12 22:03:22,517 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:03:22,517 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:03:22,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash -91738348, now seen corresponding path program 4 times [2024-09-12 22:03:22,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:03:22,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685663365] [2024-09-12 22:03:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:03:22,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:03:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:22,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:03:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:03:22,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:03:22,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685663365] [2024-09-12 22:03:22,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685663365] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:03:22,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554075283] [2024-09-12 22:03:22,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:03:22,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:03:22,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:03:22,929 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:03:22,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-12 22:03:22,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:03:22,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:03:22,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 22:03:22,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:03:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:03:23,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:03:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:03:23,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554075283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:03:23,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:03:23,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 26 [2024-09-12 22:03:23,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808755091] [2024-09-12 22:03:23,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:03:23,171 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 22:03:23,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:03:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 22:03:23,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2024-09-12 22:03:23,171 INFO L87 Difference]: Start difference. First operand 500 states and 717 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:03:23,997 INFO L93 Difference]: Finished difference Result 529 states and 757 transitions. [2024-09-12 22:03:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 22:03:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-12 22:03:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:03:23,999 INFO L225 Difference]: With dead ends: 529 [2024-09-12 22:03:23,999 INFO L226 Difference]: Without dead ends: 524 [2024-09-12 22:03:24,000 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2024-09-12 22:03:24,000 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 110 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:03:24,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 337 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:03:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-09-12 22:03:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 501. [2024-09-12 22:03:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 496 states have (on average 1.4375) internal successors, (713), 496 states have internal predecessors, (713), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 717 transitions. [2024-09-12 22:03:24,550 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 717 transitions. Word has length 38 [2024-09-12 22:03:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:03:24,550 INFO L474 AbstractCegarLoop]: Abstraction has 501 states and 717 transitions. [2024-09-12 22:03:24,551 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:24,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 717 transitions. [2024-09-12 22:03:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 22:03:24,551 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:03:24,551 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:03:24,564 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-12 22:03:24,752 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:03:24,752 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:03:24,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:24,752 INFO L85 PathProgramCache]: Analyzing trace with hash -549928001, now seen corresponding path program 5 times [2024-09-12 22:03:24,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:03:24,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173285968] [2024-09-12 22:03:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:03:24,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:03:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:25,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:03:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:03:25,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:03:25,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173285968] [2024-09-12 22:03:25,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173285968] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:03:25,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17049462] [2024-09-12 22:03:25,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:03:25,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:03:25,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:03:25,046 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:03:25,047 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-12 22:03:25,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 22:03:25,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:03:25,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-12 22:03:25,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:03:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:03:25,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:03:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:03:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17049462] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:03:25,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:03:25,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 47 [2024-09-12 22:03:25,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079044955] [2024-09-12 22:03:25,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:03:25,847 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-12 22:03:25,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:03:25,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-12 22:03:25,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 22:03:25,848 INFO L87 Difference]: Start difference. First operand 501 states and 717 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:03:29,424 INFO L93 Difference]: Finished difference Result 873 states and 1175 transitions. [2024-09-12 22:03:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-09-12 22:03:29,425 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-12 22:03:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:03:29,428 INFO L225 Difference]: With dead ends: 873 [2024-09-12 22:03:29,428 INFO L226 Difference]: Without dead ends: 816 [2024-09-12 22:03:29,429 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2234, Invalid=8686, Unknown=0, NotChecked=0, Total=10920 [2024-09-12 22:03:29,429 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 369 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 22:03:29,430 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 282 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 22:03:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2024-09-12 22:03:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 597. [2024-09-12 22:03:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 592 states have (on average 1.429054054054054) internal successors, (846), 592 states have internal predecessors, (846), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 850 transitions. [2024-09-12 22:03:30,130 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 850 transitions. Word has length 39 [2024-09-12 22:03:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:03:30,131 INFO L474 AbstractCegarLoop]: Abstraction has 597 states and 850 transitions. [2024-09-12 22:03:30,131 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:30,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 850 transitions. [2024-09-12 22:03:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 22:03:30,132 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:03:30,132 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:03:30,149 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-12 22:03:30,332 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-12 22:03:30,333 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:03:30,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1368474127, now seen corresponding path program 6 times [2024-09-12 22:03:30,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:03:30,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079552702] [2024-09-12 22:03:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:03:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:03:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:30,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:03:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:03:30,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:03:30,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079552702] [2024-09-12 22:03:30,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079552702] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:03:30,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265818469] [2024-09-12 22:03:30,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:03:30,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:03:30,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:03:30,760 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:03:30,761 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-12 22:03:30,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-12 22:03:30,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:03:30,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 22:03:30,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:03:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:03:31,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:03:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:03:31,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265818469] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:03:31,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:03:31,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 29 [2024-09-12 22:03:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522751314] [2024-09-12 22:03:31,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:03:31,095 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-12 22:03:31,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:03:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-12 22:03:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2024-09-12 22:03:31,095 INFO L87 Difference]: Start difference. First operand 597 states and 850 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:03:32,063 INFO L93 Difference]: Finished difference Result 620 states and 886 transitions. [2024-09-12 22:03:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 22:03:32,063 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-12 22:03:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:03:32,066 INFO L225 Difference]: With dead ends: 620 [2024-09-12 22:03:32,066 INFO L226 Difference]: Without dead ends: 615 [2024-09-12 22:03:32,066 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2024-09-12 22:03:32,067 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 97 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:03:32,069 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 425 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:03:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2024-09-12 22:03:32,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 595. [2024-09-12 22:03:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 590 states have (on average 1.4254237288135594) internal successors, (841), 590 states have internal predecessors, (841), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 845 transitions. [2024-09-12 22:03:32,789 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 845 transitions. Word has length 41 [2024-09-12 22:03:32,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:03:32,789 INFO L474 AbstractCegarLoop]: Abstraction has 595 states and 845 transitions. [2024-09-12 22:03:32,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:03:32,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 845 transitions. [2024-09-12 22:03:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 22:03:32,791 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:03:32,791 INFO L216 NwaCegarLoop]: trace histogram [15, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:03:32,810 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-12 22:03:32,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-12 22:03:32,991 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:03:32,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:03:32,992 INFO L85 PathProgramCache]: Analyzing trace with hash 997028128, now seen corresponding path program 22 times [2024-09-12 22:03:32,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:03:32,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714316298] [2024-09-12 22:03:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:03:32,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:03:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:33,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:03:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:03:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 22:03:33,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:03:33,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714316298] [2024-09-12 22:03:33,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714316298] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:03:33,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284373529] [2024-09-12 22:03:33,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:03:33,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:03:33,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:03:33,351 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:03:33,352 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-12 22:03:33,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:03:33,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:03:33,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 22:03:33,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:03:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 22:03:33,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:03:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 22:03:34,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284373529] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:03:34,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:03:34,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2024-09-12 22:03:34,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888229402] [2024-09-12 22:03:34,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:03:34,136 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 22:03:34,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:03:34,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 22:03:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 22:03:34,137 INFO L87 Difference]: Start difference. First operand 595 states and 845 transitions. Second operand has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:04:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:04:25,475 INFO L93 Difference]: Finished difference Result 1488 states and 2097 transitions. [2024-09-12 22:04:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2024-09-12 22:04:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-12 22:04:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:04:25,480 INFO L225 Difference]: With dead ends: 1488 [2024-09-12 22:04:25,480 INFO L226 Difference]: Without dead ends: 1329 [2024-09-12 22:04:25,483 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39482 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=19408, Invalid=75764, Unknown=0, NotChecked=0, Total=95172 [2024-09-12 22:04:25,484 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 1855 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:04:25,484 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1855 Valid, 640 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-12 22:04:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2024-09-12 22:04:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 566. [2024-09-12 22:04:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 561 states have (on average 1.4705882352941178) internal successors, (825), 561 states have internal predecessors, (825), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:04:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 829 transitions. [2024-09-12 22:04:26,186 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 829 transitions. Word has length 41 [2024-09-12 22:04:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:04:26,186 INFO L474 AbstractCegarLoop]: Abstraction has 566 states and 829 transitions. [2024-09-12 22:04:26,186 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:04:26,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:04:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 829 transitions. [2024-09-12 22:04:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:04:26,187 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:04:26,187 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:04:26,201 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-12 22:04:26,391 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-12 22:04:26,392 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:04:26,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:04:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash -996913980, now seen corresponding path program 23 times [2024-09-12 22:04:26,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:04:26,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586167929] [2024-09-12 22:04:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:04:26,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:04:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:04:27,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:04:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:04:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:04:27,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:04:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586167929] [2024-09-12 22:04:27,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586167929] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:04:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963157093] [2024-09-12 22:04:27,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:04:27,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:04:27,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:04:27,293 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:04:27,293 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-12 22:04:27,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 22:04:27,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:04:27,462 WARN L260 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-09-12 22:04:27,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:04:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:04:28,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:04:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:04:31,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963157093] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:04:31,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:04:31,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 35, 35] total 91 [2024-09-12 22:04:31,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798799202] [2024-09-12 22:04:31,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:04:31,887 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-09-12 22:04:31,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:04:31,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-09-12 22:04:31,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2024-09-12 22:04:31,888 INFO L87 Difference]: Start difference. First operand 566 states and 829 transitions. Second operand has 91 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 89 states have internal predecessors, (107), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:04:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:04:49,462 INFO L93 Difference]: Finished difference Result 609 states and 882 transitions. [2024-09-12 22:04:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-09-12 22:04:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 89 states have internal predecessors, (107), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 22:04:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:04:49,465 INFO L225 Difference]: With dead ends: 609 [2024-09-12 22:04:49,465 INFO L226 Difference]: Without dead ends: 601 [2024-09-12 22:04:49,466 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=2284, Invalid=20366, Unknown=0, NotChecked=0, Total=22650 [2024-09-12 22:04:49,466 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 276 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 3099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:04:49,466 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 547 Invalid, 3099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-12 22:04:49,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2024-09-12 22:04:50,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 580. [2024-09-12 22:04:50,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 575 states have (on average 1.4608695652173913) internal successors, (840), 575 states have internal predecessors, (840), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:04:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 844 transitions. [2024-09-12 22:04:50,224 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 844 transitions. Word has length 42 [2024-09-12 22:04:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:04:50,225 INFO L474 AbstractCegarLoop]: Abstraction has 580 states and 844 transitions. [2024-09-12 22:04:50,225 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 89 states have internal predecessors, (107), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:04:50,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:04:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 844 transitions. [2024-09-12 22:04:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:04:50,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:04:50,226 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:04:50,243 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-12 22:04:50,426 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-12 22:04:50,426 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:04:50,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:04:50,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1665020258, now seen corresponding path program 7 times [2024-09-12 22:04:50,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:04:50,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164739934] [2024-09-12 22:04:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:04:50,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:04:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:04:50,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:04:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:04:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:04:50,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:04:50,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164739934] [2024-09-12 22:04:50,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164739934] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:04:50,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481606975] [2024-09-12 22:04:50,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:04:50,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:04:50,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:04:50,709 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:04:50,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-12 22:04:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:04:50,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 22:04:50,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:04:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:04:50,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:04:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:04:51,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481606975] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:04:51,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:04:51,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2024-09-12 22:04:51,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111999062] [2024-09-12 22:04:51,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:04:51,381 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 22:04:51,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:04:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 22:04:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 22:04:51,382 INFO L87 Difference]: Start difference. First operand 580 states and 844 transitions. Second operand has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:05:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:05:24,597 INFO L93 Difference]: Finished difference Result 1126 states and 1523 transitions. [2024-09-12 22:05:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2024-09-12 22:05:24,597 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 22:05:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:05:24,600 INFO L225 Difference]: With dead ends: 1126 [2024-09-12 22:05:24,601 INFO L226 Difference]: Without dead ends: 1024 [2024-09-12 22:05:24,603 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29478 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=10451, Invalid=69355, Unknown=0, NotChecked=0, Total=79806 [2024-09-12 22:05:24,604 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1128 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 2476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-12 22:05:24,604 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 367 Invalid, 2476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-12 22:05:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2024-09-12 22:05:25,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 575. [2024-09-12 22:05:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 570 states have (on average 1.4473684210526316) internal successors, (825), 570 states have internal predecessors, (825), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:05:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 829 transitions. [2024-09-12 22:05:25,368 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 829 transitions. Word has length 42 [2024-09-12 22:05:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:05:25,368 INFO L474 AbstractCegarLoop]: Abstraction has 575 states and 829 transitions. [2024-09-12 22:05:25,368 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:05:25,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:05:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 829 transitions. [2024-09-12 22:05:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:05:25,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:05:25,370 INFO L216 NwaCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:05:25,382 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-12 22:05:25,571 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-12 22:05:25,572 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:05:25,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:05:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash 653171604, now seen corresponding path program 4 times [2024-09-12 22:05:25,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:05:25,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145848844] [2024-09-12 22:05:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:05:25,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:05:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:05:26,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:05:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:05:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:05:26,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:05:26,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145848844] [2024-09-12 22:05:26,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145848844] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:05:26,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102363355] [2024-09-12 22:05:26,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:05:26,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:05:26,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:05:26,098 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:05:26,099 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-12 22:05:26,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:05:26,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:05:26,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-12 22:05:26,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:05:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:05:26,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:05:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:05:27,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102363355] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:05:27,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:05:27,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2024-09-12 22:05:27,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480551672] [2024-09-12 22:05:27,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:05:27,398 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-12 22:05:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:05:27,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-12 22:05:27,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=2940, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 22:05:27,399 INFO L87 Difference]: Start difference. First operand 575 states and 829 transitions. Second operand has 63 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:06:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:06:34,217 INFO L93 Difference]: Finished difference Result 3903 states and 6247 transitions. [2024-09-12 22:06:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2024-09-12 22:06:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 22:06:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:06:34,227 INFO L225 Difference]: With dead ends: 3903 [2024-09-12 22:06:34,227 INFO L226 Difference]: Without dead ends: 3840 [2024-09-12 22:06:34,229 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7797 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=8995, Invalid=19735, Unknown=0, NotChecked=0, Total=28730 [2024-09-12 22:06:34,229 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 3259 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 3261 mSolverCounterSat, 1212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3259 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 4473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1212 IncrementalHoareTripleChecker+Valid, 3261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:06:34,230 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3259 Valid, 1681 Invalid, 4473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1212 Valid, 3261 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2024-09-12 22:06:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2024-09-12 22:06:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 844. [2024-09-12 22:06:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 839 states have (on average 1.3611442193087009) internal successors, (1142), 839 states have internal predecessors, (1142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:06:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1146 transitions. [2024-09-12 22:06:35,834 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1146 transitions. Word has length 42 [2024-09-12 22:06:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:06:35,834 INFO L474 AbstractCegarLoop]: Abstraction has 844 states and 1146 transitions. [2024-09-12 22:06:35,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:06:35,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:06:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1146 transitions. [2024-09-12 22:06:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 22:06:35,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:06:35,835 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:06:35,852 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-12 22:06:36,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-12 22:06:36,036 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:06:36,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:06:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1184027956, now seen corresponding path program 8 times [2024-09-12 22:06:36,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:06:36,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432810784] [2024-09-12 22:06:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:06:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:06:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:06:36,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:06:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:06:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 22:06:36,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:06:36,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432810784] [2024-09-12 22:06:36,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432810784] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:06:36,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346838247] [2024-09-12 22:06:36,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:06:36,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:06:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:06:36,512 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:06:36,513 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-12 22:06:36,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:06:36,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:06:36,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-12 22:06:36,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:06:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 22:06:36,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:06:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 22:06:36,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346838247] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:06:36,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:06:36,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 13] total 32 [2024-09-12 22:06:36,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017982294] [2024-09-12 22:06:36,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:06:36,816 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 22:06:36,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:06:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 22:06:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2024-09-12 22:06:36,816 INFO L87 Difference]: Start difference. First operand 844 states and 1146 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:06:38,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:06:38,772 INFO L93 Difference]: Finished difference Result 875 states and 1192 transitions. [2024-09-12 22:06:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 22:06:38,773 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-12 22:06:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:06:38,777 INFO L225 Difference]: With dead ends: 875 [2024-09-12 22:06:38,777 INFO L226 Difference]: Without dead ends: 870 [2024-09-12 22:06:38,777 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2024-09-12 22:06:38,778 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 97 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:06:38,778 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 536 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:06:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2024-09-12 22:06:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 841. [2024-09-12 22:06:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 836 states have (on average 1.3588516746411483) internal successors, (1136), 836 states have internal predecessors, (1136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:06:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1140 transitions. [2024-09-12 22:06:40,399 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1140 transitions. Word has length 44 [2024-09-12 22:06:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:06:40,399 INFO L474 AbstractCegarLoop]: Abstraction has 841 states and 1140 transitions. [2024-09-12 22:06:40,399 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:06:40,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:06:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1140 transitions. [2024-09-12 22:06:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 22:06:40,400 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:06:40,400 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:06:40,413 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-12 22:06:40,601 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-12 22:06:40,601 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:06:40,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:06:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1376192863, now seen corresponding path program 9 times [2024-09-12 22:06:40,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:06:40,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747100422] [2024-09-12 22:06:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:06:40,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:06:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:06:40,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:06:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:06:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 22:06:40,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:06:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747100422] [2024-09-12 22:06:40,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747100422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:06:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852659320] [2024-09-12 22:06:40,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:06:40,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:06:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:06:40,926 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:06:40,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-12 22:06:41,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 22:06:41,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:06:41,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-12 22:06:41,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:06:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 22:06:41,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:06:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 22:06:42,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852659320] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:06:42,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:06:42,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 57 [2024-09-12 22:06:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167643418] [2024-09-12 22:06:42,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:06:42,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-12 22:06:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:06:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-12 22:06:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2696, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 22:06:42,082 INFO L87 Difference]: Start difference. First operand 841 states and 1140 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:06:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:06:52,317 INFO L93 Difference]: Finished difference Result 1741 states and 2057 transitions. [2024-09-12 22:06:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2024-09-12 22:06:52,318 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 2 states have call successors, (3), 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 45 [2024-09-12 22:06:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:06:52,324 INFO L225 Difference]: With dead ends: 1741 [2024-09-12 22:06:52,324 INFO L226 Difference]: Without dead ends: 1700 [2024-09-12 22:06:52,326 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9492 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5448, Invalid=22274, Unknown=0, NotChecked=0, Total=27722 [2024-09-12 22:06:52,326 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 668 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:06:52,327 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 364 Invalid, 2572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-12 22:06:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2024-09-12 22:06:53,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 855. [2024-09-12 22:06:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 850 states have (on average 1.36) internal successors, (1156), 850 states have internal predecessors, (1156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:06:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1160 transitions. [2024-09-12 22:06:53,937 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1160 transitions. Word has length 45 [2024-09-12 22:06:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:06:53,938 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 1160 transitions. [2024-09-12 22:06:53,938 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:06:53,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:06:53,938 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1160 transitions. [2024-09-12 22:06:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 22:06:53,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:06:53,939 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:06:53,957 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-12 22:06:54,140 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-12 22:06:54,140 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:06:54,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:06:54,140 INFO L85 PathProgramCache]: Analyzing trace with hash 338625684, now seen corresponding path program 24 times [2024-09-12 22:06:54,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:06:54,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294450092] [2024-09-12 22:06:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:06:54,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:06:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:06:55,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:06:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:06:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:06:55,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:06:55,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294450092] [2024-09-12 22:06:55,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294450092] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:06:55,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857150328] [2024-09-12 22:06:55,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:06:55,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:06:55,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:06:55,095 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:06:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-12 22:06:55,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 22:06:55,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:06:55,329 WARN L260 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-09-12 22:06:55,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:06:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:06:57,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:00,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857150328] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:00,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:00,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 40, 39] total 103 [2024-09-12 22:07:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958201658] [2024-09-12 22:07:00,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:00,158 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-09-12 22:07:00,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-09-12 22:07:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=9445, Unknown=0, NotChecked=0, Total=10506 [2024-09-12 22:07:00,159 INFO L87 Difference]: Start difference. First operand 855 states and 1160 transitions. Second operand has 103 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 101 states have internal predecessors, (119), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:11,859 INFO L93 Difference]: Finished difference Result 906 states and 1214 transitions. [2024-09-12 22:07:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-12 22:07:11,860 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 101 states have internal predecessors, (119), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-12 22:07:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:11,863 INFO L225 Difference]: With dead ends: 906 [2024-09-12 22:07:11,863 INFO L226 Difference]: Without dead ends: 869 [2024-09-12 22:07:11,864 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6089 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=3361, Invalid=20819, Unknown=0, NotChecked=0, Total=24180 [2024-09-12 22:07:11,864 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 229 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 2815 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 2815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:11,865 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 547 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 2815 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-12 22:07:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2024-09-12 22:07:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 853. [2024-09-12 22:07:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 848 states have (on average 1.3608490566037736) internal successors, (1154), 848 states have internal predecessors, (1154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1158 transitions. [2024-09-12 22:07:13,424 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1158 transitions. Word has length 46 [2024-09-12 22:07:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:13,424 INFO L474 AbstractCegarLoop]: Abstraction has 853 states and 1158 transitions. [2024-09-12 22:07:13,425 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 101 states have internal predecessors, (119), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:13,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1158 transitions. [2024-09-12 22:07:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 22:07:13,426 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:13,426 INFO L216 NwaCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:13,440 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-12 22:07:13,626 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:13,626 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:13,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:13,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1086025156, now seen corresponding path program 25 times [2024-09-12 22:07:13,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:13,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040677269] [2024-09-12 22:07:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:13,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:14,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:07:14,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:14,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040677269] [2024-09-12 22:07:14,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040677269] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:14,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018181183] [2024-09-12 22:07:14,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:07:14,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:14,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:14,263 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:14,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-12 22:07:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:14,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-12 22:07:14,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:07:14,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:07:15,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018181183] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:15,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:15,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2024-09-12 22:07:15,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845751355] [2024-09-12 22:07:15,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:15,779 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-12 22:07:15,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:15,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-12 22:07:15,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=3385, Unknown=0, NotChecked=0, Total=4422 [2024-09-12 22:07:15,780 INFO L87 Difference]: Start difference. First operand 853 states and 1158 transitions. Second operand has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 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) [2024-09-12 22:10:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:02,618 INFO L93 Difference]: Finished difference Result 3734 states and 5855 transitions. [2024-09-12 22:10:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2024-09-12 22:10:02,619 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 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 46 [2024-09-12 22:10:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:02,628 INFO L225 Difference]: With dead ends: 3734 [2024-09-12 22:10:02,628 INFO L226 Difference]: Without dead ends: 3674 [2024-09-12 22:10:02,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38700 ImplicationChecksByTransitivity, 141.2s TimeCoverageRelationStatistics Valid=26561, Invalid=68611, Unknown=0, NotChecked=0, Total=95172 [2024-09-12 22:10:02,633 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 5258 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 3649 mSolverCounterSat, 2251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5258 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 5900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2251 IncrementalHoareTripleChecker+Valid, 3649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:02,634 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5258 Valid, 1796 Invalid, 5900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2251 Valid, 3649 Invalid, 0 Unknown, 0 Unchecked, 18.8s Time] [2024-09-12 22:10:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2024-09-12 22:10:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 870. [2024-09-12 22:10:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 865 states have (on average 1.3491329479768785) internal successors, (1167), 865 states have internal predecessors, (1167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1171 transitions. [2024-09-12 22:10:04,474 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1171 transitions. Word has length 46 [2024-09-12 22:10:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:04,474 INFO L474 AbstractCegarLoop]: Abstraction has 870 states and 1171 transitions. [2024-09-12 22:10:04,474 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 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) [2024-09-12 22:10:04,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1171 transitions. [2024-09-12 22:10:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 22:10:04,475 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:04,475 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:04,487 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-12 22:10:04,675 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:04,676 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:04,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash -794331281, now seen corresponding path program 10 times [2024-09-12 22:10:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:04,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117508435] [2024-09-12 22:10:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:04,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:05,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 22:10:05,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:05,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117508435] [2024-09-12 22:10:05,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117508435] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:05,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168558004] [2024-09-12 22:10:05,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:10:05,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:05,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:05,316 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:10:05,317 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-12 22:10:05,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:10:05,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:05,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-12 22:10:05,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 22:10:05,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 22:10:05,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168558004] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:05,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:05,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 14] total 35 [2024-09-12 22:10:05,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572771901] [2024-09-12 22:10:05,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:05,658 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-12 22:10:05,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:05,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-12 22:10:05,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 22:10:05,658 INFO L87 Difference]: Start difference. First operand 870 states and 1171 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:08,047 INFO L93 Difference]: Finished difference Result 985 states and 1344 transitions. [2024-09-12 22:10:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 22:10:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2024-09-12 22:10:08,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:08,051 INFO L225 Difference]: With dead ends: 985 [2024-09-12 22:10:08,051 INFO L226 Difference]: Without dead ends: 980 [2024-09-12 22:10:08,051 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 22:10:08,052 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:08,052 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 613 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:10:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2024-09-12 22:10:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 948. [2024-09-12 22:10:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 943 states have (on average 1.35949098621421) internal successors, (1282), 943 states have internal predecessors, (1282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1286 transitions. [2024-09-12 22:10:10,206 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1286 transitions. Word has length 47 [2024-09-12 22:10:10,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:10,206 INFO L474 AbstractCegarLoop]: Abstraction has 948 states and 1286 transitions. [2024-09-12 22:10:10,206 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:10,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:10,206 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1286 transitions. [2024-09-12 22:10:10,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 22:10:10,207 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:10,207 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:10,225 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-12 22:10:10,408 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:10,408 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:10,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash 971995202, now seen corresponding path program 11 times [2024-09-12 22:10:10,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:10,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483556317] [2024-09-12 22:10:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:10,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:10,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 22:10:10,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:10,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483556317] [2024-09-12 22:10:10,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483556317] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:10,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841409726] [2024-09-12 22:10:10,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:10:10,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:10,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:10,751 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:10:10,752 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-12 22:10:11,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-12 22:10:11,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:11,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-12 22:10:11,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 22:10:11,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 22:10:12,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841409726] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:12,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:12,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2024-09-12 22:10:12,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460266555] [2024-09-12 22:10:12,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:12,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-12 22:10:12,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:12,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-12 22:10:12,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 22:10:12,129 INFO L87 Difference]: Start difference. First operand 948 states and 1286 transitions. Second operand has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:26,401 INFO L93 Difference]: Finished difference Result 2216 states and 2567 transitions. [2024-09-12 22:10:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2024-09-12 22:10:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2024-09-12 22:10:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:26,406 INFO L225 Difference]: With dead ends: 2216 [2024-09-12 22:10:26,406 INFO L226 Difference]: Without dead ends: 2165 [2024-09-12 22:10:26,408 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12321 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=7002, Invalid=28154, Unknown=0, NotChecked=0, Total=35156 [2024-09-12 22:10:26,409 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 669 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:26,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 456 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-12 22:10:26,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2024-09-12 22:10:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 957. [2024-09-12 22:10:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 952 states have (on average 1.35609243697479) internal successors, (1291), 952 states have internal predecessors, (1291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1295 transitions. [2024-09-12 22:10:28,458 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1295 transitions. Word has length 48 [2024-09-12 22:10:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:28,458 INFO L474 AbstractCegarLoop]: Abstraction has 957 states and 1295 transitions. [2024-09-12 22:10:28,459 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:28,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1295 transitions. [2024-09-12 22:10:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 22:10:28,460 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:28,461 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:28,479 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-09-12 22:10:28,661 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-12 22:10:28,661 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:28,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1529026364, now seen corresponding path program 26 times [2024-09-12 22:10:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:28,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671727927] [2024-09-12 22:10:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:28,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:29,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671727927] [2024-09-12 22:10:29,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671727927] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459561446] [2024-09-12 22:10:29,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:10:29,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:29,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:29,676 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:10:29,677 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-12 22:10:29,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:10:29,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:29,776 WARN L260 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-09-12 22:10:29,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:32,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:10:35,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459561446] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:35,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:35,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 44, 43] total 114 [2024-09-12 22:10:35,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113701157] [2024-09-12 22:10:35,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:35,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2024-09-12 22:10:35,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2024-09-12 22:10:35,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1287, Invalid=11595, Unknown=0, NotChecked=0, Total=12882 [2024-09-12 22:10:35,811 INFO L87 Difference]: Start difference. First operand 957 states and 1295 transitions. Second operand has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 112 states have internal predecessors, (131), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:51,657 INFO L93 Difference]: Finished difference Result 1014 states and 1355 transitions. [2024-09-12 22:10:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-09-12 22:10:51,657 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 112 states have internal predecessors, (131), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2024-09-12 22:10:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:51,660 INFO L225 Difference]: With dead ends: 1014 [2024-09-12 22:10:51,660 INFO L226 Difference]: Without dead ends: 974 [2024-09-12 22:10:51,661 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8199 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=4440, Invalid=27066, Unknown=0, NotChecked=0, Total=31506 [2024-09-12 22:10:51,661 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 247 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 3410 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 3410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:51,662 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 598 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 3410 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-12 22:10:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2024-09-12 22:10:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 955. [2024-09-12 22:10:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 950 states have (on average 1.3568421052631578) internal successors, (1289), 950 states have internal predecessors, (1289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1293 transitions. [2024-09-12 22:10:53,687 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1293 transitions. Word has length 50 [2024-09-12 22:10:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:53,687 INFO L474 AbstractCegarLoop]: Abstraction has 955 states and 1293 transitions. [2024-09-12 22:10:53,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 112 states have internal predecessors, (131), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:53,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1293 transitions. [2024-09-12 22:10:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 22:10:53,688 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:53,689 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:53,701 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:53,889 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:53,889 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:53,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1317356372, now seen corresponding path program 12 times [2024-09-12 22:10:53,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:53,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753912161] [2024-09-12 22:10:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:54,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:10:54,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753912161] [2024-09-12 22:10:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753912161] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583358685] [2024-09-12 22:10:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:10:54,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:54,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:54,429 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:10:54,430 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-12 22:10:54,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 22:10:54,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:54,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-12 22:10:54,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:10:54,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:10:54,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583358685] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:54,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:54,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 15] total 38 [2024-09-12 22:10:54,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082013121] [2024-09-12 22:10:54,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:54,897 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 22:10:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 22:10:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 22:10:54,898 INFO L87 Difference]: Start difference. First operand 955 states and 1293 transitions. Second operand has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:57,491 INFO L93 Difference]: Finished difference Result 1073 states and 1470 transitions. [2024-09-12 22:10:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 22:10:57,491 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2024-09-12 22:10:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:57,494 INFO L225 Difference]: With dead ends: 1073 [2024-09-12 22:10:57,494 INFO L226 Difference]: Without dead ends: 1068 [2024-09-12 22:10:57,494 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 22:10:57,495 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 122 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:57,495 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 704 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:10:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2024-09-12 22:10:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1033. [2024-09-12 22:10:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1028 states have (on average 1.3647859922178989) internal successors, (1403), 1028 states have internal predecessors, (1403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1407 transitions. [2024-09-12 22:10:59,761 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1407 transitions. Word has length 50 [2024-09-12 22:10:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:59,761 INFO L474 AbstractCegarLoop]: Abstraction has 1033 states and 1407 transitions. [2024-09-12 22:10:59,761 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:59,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1407 transitions. [2024-09-12 22:10:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 22:10:59,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:59,763 INFO L216 NwaCegarLoop]: trace histogram [30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:59,775 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:59,963 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:59,963 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:59,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash -495897836, now seen corresponding path program 27 times [2024-09-12 22:10:59,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:59,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511442587] [2024-09-12 22:10:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:59,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:00,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:11:00,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:00,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511442587] [2024-09-12 22:11:00,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511442587] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:00,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291227556] [2024-09-12 22:11:00,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:11:00,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:00,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:00,539 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:11:00,541 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-12 22:11:00,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-12 22:11:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:11:00,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-12 22:11:00,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:11:00,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:11:02,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291227556] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:02,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:02,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 71 [2024-09-12 22:11:02,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633492839] [2024-09-12 22:11:02,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:02,254 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-12 22:11:02,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:02,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-12 22:11:02,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1112, Invalid=3858, Unknown=0, NotChecked=0, Total=4970 [2024-09-12 22:11:02,256 INFO L87 Difference]: Start difference. First operand 1033 states and 1407 transitions. Second operand has 71 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Killed by 15