./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de61.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-de61.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 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 22:12:29,271 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:12:29,326 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:12:29,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:12:29,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:12:29,355 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:12:29,356 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:12:29,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:12:29,356 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:12:29,357 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:12:29,358 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:12:29,358 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:12:29,358 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:12:29,358 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:12:29,360 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:12:29,360 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:12:29,360 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:12:29,361 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:12:29,361 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:12:29,361 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:12:29,361 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:12:29,364 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:12:29,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:12:29,364 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:12:29,364 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:12:29,364 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:12:29,365 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:12:29,365 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:12:29,365 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:12:29,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:12:29,365 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:12:29,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:12:29,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:12:29,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:12:29,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:12:29,366 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:12:29,366 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:12:29,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:12:29,366 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:12:29,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:12:29,367 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:12:29,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:12:29,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:12:29,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:12:29,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:12:29,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:12:29,577 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:12:29,577 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:12:29,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de61.c [2024-09-12 22:12:30,815 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:12:30,941 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:12:30,942 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de61.c [2024-09-12 22:12:30,946 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ccba43ca0/70233b3fb7e2429cb3f2c95f60d208c2/FLAG14eddf6eb [2024-09-12 22:12:31,366 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ccba43ca0/70233b3fb7e2429cb3f2c95f60d208c2 [2024-09-12 22:12:31,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:12:31,370 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:12:31,370 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:12:31,371 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:12:31,374 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:12:31,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@417a1440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31, skipping insertion in model container [2024-09-12 22:12:31,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,394 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:12:31,516 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-de61.c[368,381] [2024-09-12 22:12:31,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:12:31,547 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:12:31,555 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-de61.c[368,381] [2024-09-12 22:12:31,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:12:31,576 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:12:31,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31 WrapperNode [2024-09-12 22:12:31,579 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:12:31,579 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:12:31,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:12:31,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:12:31,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,590 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,594 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:12:31,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:12:31,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:12:31,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:12:31,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:12:31,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,616 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,630 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 22:12:31,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,631 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,633 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,635 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,636 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,637 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:12:31,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:12:31,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:12:31,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:12:31,641 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (1/1) ... [2024-09-12 22:12:31,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:12:31,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:31,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 22:12:31,670 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 22:12:31,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:12:31,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:12:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:12:31,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:12:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:12:31,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:12:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:12:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:12:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 22:12:31,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 22:12:31,751 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:12:31,752 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:12:31,863 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 22:12:31,863 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:12:31,877 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:12:31,878 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-12 22:12:31,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:12:31 BoogieIcfgContainer [2024-09-12 22:12:31,878 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:12:31,879 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:12:31,880 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:12:31,882 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:12:31,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:12:31" (1/3) ... [2024-09-12 22:12:31,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4887a3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:12:31, skipping insertion in model container [2024-09-12 22:12:31,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:12:31" (2/3) ... [2024-09-12 22:12:31,883 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4887a3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:12:31, skipping insertion in model container [2024-09-12 22:12:31,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:12:31" (3/3) ... [2024-09-12 22:12:31,884 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de61.c [2024-09-12 22:12:31,896 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:12:31,897 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 22:12:31,937 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:12:31,943 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;@2114f2b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:12:31,943 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 22:12:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:12:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:12:31,951 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:31,952 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:31,952 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:31,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash -294793433, now seen corresponding path program 1 times [2024-09-12 22:12:31,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:31,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336875115] [2024-09-12 22:12:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:31,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:32,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:32,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:32,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336875115] [2024-09-12 22:12:32,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336875115] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:12:32,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:12:32,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 22:12:32,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734235621] [2024-09-12 22:12:32,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:12:32,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 22:12:32,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 22:12:32,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:12:32,122 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:32,148 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2024-09-12 22:12:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 22:12:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-12 22:12:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:32,155 INFO L225 Difference]: With dead ends: 40 [2024-09-12 22:12:32,155 INFO L226 Difference]: Without dead ends: 17 [2024-09-12 22:12:32,158 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:12:32,160 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:32,162 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:12:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-12 22:12:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-12 22:12:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2024-09-12 22:12:32,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 16 [2024-09-12 22:12:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:32,213 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2024-09-12 22:12:32,213 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:32,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2024-09-12 22:12:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:12:32,217 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:32,218 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:32,218 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:12:32,218 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:32,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:32,219 INFO L85 PathProgramCache]: Analyzing trace with hash -951970017, now seen corresponding path program 1 times [2024-09-12 22:12:32,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:32,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264520917] [2024-09-12 22:12:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:32,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:32,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:32,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:32,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264520917] [2024-09-12 22:12:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264520917] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:12:32,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:12:32,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 22:12:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978329109] [2024-09-12 22:12:32,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:12:32,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 22:12:32,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 22:12:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:12:32,696 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:32,789 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2024-09-12 22:12:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 22:12:32,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-12 22:12:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:32,790 INFO L225 Difference]: With dead ends: 37 [2024-09-12 22:12:32,790 INFO L226 Difference]: Without dead ends: 18 [2024-09-12 22:12:32,791 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:12:32,792 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:32,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 60 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:12:32,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-12 22:12:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-12 22:12:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-09-12 22:12:32,798 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 16 [2024-09-12 22:12:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:32,799 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-09-12 22:12:32,799 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:32,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-09-12 22:12:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 22:12:32,800 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:32,801 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:32,801 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 22:12:32,801 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:32,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash -713894869, now seen corresponding path program 1 times [2024-09-12 22:12:32,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:32,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410151433] [2024-09-12 22:12:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:32,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:32,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:32,885 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 22:12:32,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:32,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410151433] [2024-09-12 22:12:32,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410151433] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:32,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81514860] [2024-09-12 22:12:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:32,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:32,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:32,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:32,891 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:12:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:32,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 22:12:32,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:32,953 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 22:12:32,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:33,021 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 22:12:33,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81514860] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:33,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:33,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-12 22:12:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545509569] [2024-09-12 22:12:33,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:33,026 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:12:33,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:12:33,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:12:33,027 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 22:12:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:33,183 INFO L93 Difference]: Finished difference Result 59 states and 96 transitions. [2024-09-12 22:12:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:12:33,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 17 [2024-09-12 22:12:33,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:33,185 INFO L225 Difference]: With dead ends: 59 [2024-09-12 22:12:33,185 INFO L226 Difference]: Without dead ends: 50 [2024-09-12 22:12:33,186 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 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 22:12:33,188 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:33,189 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 78 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:12:33,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-12 22:12:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2024-09-12 22:12:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2024-09-12 22:12:33,203 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 59 transitions. Word has length 17 [2024-09-12 22:12:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:33,204 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 59 transitions. [2024-09-12 22:12:33,204 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 22:12:33,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2024-09-12 22:12:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 22:12:33,205 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:33,205 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:33,219 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 22:12:33,405 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:33,406 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:33,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:33,406 INFO L85 PathProgramCache]: Analyzing trace with hash 49422170, now seen corresponding path program 1 times [2024-09-12 22:12:33,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:33,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175710720] [2024-09-12 22:12:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:33,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:33,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:33,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:33,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175710720] [2024-09-12 22:12:33,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175710720] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:33,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344450989] [2024-09-12 22:12:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:33,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:33,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:33,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:33,534 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:12:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:33,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 22:12:33,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:33,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:33,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344450989] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:33,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:33,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-12 22:12:33,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858963428] [2024-09-12 22:12:33,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:33,659 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 22:12:33,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 22:12:33,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:12:33,660 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:34,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:34,078 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2024-09-12 22:12:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 22:12:34,078 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-12 22:12:34,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:34,081 INFO L225 Difference]: With dead ends: 108 [2024-09-12 22:12:34,082 INFO L226 Difference]: Without dead ends: 87 [2024-09-12 22:12:34,082 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:12:34,083 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:34,085 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 101 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:12:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-12 22:12:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 56. [2024-09-12 22:12:34,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2024-09-12 22:12:34,102 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 19 [2024-09-12 22:12:34,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:34,103 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2024-09-12 22:12:34,103 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:34,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2024-09-12 22:12:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:12:34,104 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:34,104 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:34,116 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 22:12:34,308 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:34,308 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:34,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:34,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1324513826, now seen corresponding path program 1 times [2024-09-12 22:12:34,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:34,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830608920] [2024-09-12 22:12:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:34,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:34,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:34,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:34,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830608920] [2024-09-12 22:12:34,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830608920] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:34,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144043917] [2024-09-12 22:12:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:34,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:34,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:34,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:34,381 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:12:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:34,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:12:34,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:34,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:12:34,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144043917] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:34,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:34,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 15 [2024-09-12 22:12:34,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573988579] [2024-09-12 22:12:34,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:34,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 22:12:34,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 22:12:34,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:12:34,673 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (5), 4 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 22:12:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:34,799 INFO L93 Difference]: Finished difference Result 90 states and 132 transitions. [2024-09-12 22:12:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 22:12:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-12 22:12:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:34,802 INFO L225 Difference]: With dead ends: 90 [2024-09-12 22:12:34,802 INFO L226 Difference]: Without dead ends: 79 [2024-09-12 22:12:34,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-09-12 22:12:34,803 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:34,803 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 197 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:12:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-12 22:12:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2024-09-12 22:12:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 58 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 90 transitions. [2024-09-12 22:12:34,820 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 90 transitions. Word has length 20 [2024-09-12 22:12:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:34,821 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 90 transitions. [2024-09-12 22:12:34,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (5), 4 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 22:12:34,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 90 transitions. [2024-09-12 22:12:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:12:34,822 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:34,822 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:34,839 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 22:12:35,023 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:35,023 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:35,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash 739179039, now seen corresponding path program 2 times [2024-09-12 22:12:35,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417216194] [2024-09-12 22:12:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:35,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:35,100 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 22:12:35,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:35,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417216194] [2024-09-12 22:12:35,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417216194] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:35,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209604922] [2024-09-12 22:12:35,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:12:35,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:35,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:35,102 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:35,103 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:12:35,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:12:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:35,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 22:12:35,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:35,150 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 22:12:35,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:35,222 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 22:12:35,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209604922] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:35,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:35,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-12 22:12:35,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123372814] [2024-09-12 22:12:35,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:35,223 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 22:12:35,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 22:12:35,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:12:35,224 INFO L87 Difference]: Start difference. First operand 63 states and 90 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:12:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:35,814 INFO L93 Difference]: Finished difference Result 221 states and 363 transitions. [2024-09-12 22:12:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 22:12:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:12:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:35,816 INFO L225 Difference]: With dead ends: 221 [2024-09-12 22:12:35,816 INFO L226 Difference]: Without dead ends: 196 [2024-09-12 22:12:35,816 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2024-09-12 22:12:35,817 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 282 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:35,817 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 201 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:12:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-09-12 22:12:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 123. [2024-09-12 22:12:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.5254237288135593) internal successors, (180), 118 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 184 transitions. [2024-09-12 22:12:35,852 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 184 transitions. Word has length 20 [2024-09-12 22:12:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:35,852 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 184 transitions. [2024-09-12 22:12:35,853 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:12:35,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 184 transitions. [2024-09-12 22:12:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 22:12:35,854 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:35,854 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:35,868 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:36,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:36,058 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:36,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1756794400, now seen corresponding path program 1 times [2024-09-12 22:12:36,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:36,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145111537] [2024-09-12 22:12:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:36,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:36,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:12:36,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:36,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145111537] [2024-09-12 22:12:36,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145111537] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:36,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590110919] [2024-09-12 22:12:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:36,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:36,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:36,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:36,358 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:12:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:36,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 22:12:36,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:12:36,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:12:36,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590110919] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:36,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:36,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2024-09-12 22:12:36,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918247001] [2024-09-12 22:12:36,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:36,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 22:12:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:36,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 22:12:36,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-09-12 22:12:36,678 INFO L87 Difference]: Start difference. First operand 123 states and 184 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:37,229 INFO L93 Difference]: Finished difference Result 167 states and 242 transitions. [2024-09-12 22:12:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 22:12:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 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 22:12:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:37,234 INFO L225 Difference]: With dead ends: 167 [2024-09-12 22:12:37,235 INFO L226 Difference]: Without dead ends: 158 [2024-09-12 22:12:37,235 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 22:12:37,236 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:37,236 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 134 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:12:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-09-12 22:12:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 123. [2024-09-12 22:12:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.5254237288135593) internal successors, (180), 118 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 184 transitions. [2024-09-12 22:12:37,277 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 184 transitions. Word has length 22 [2024-09-12 22:12:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:37,277 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 184 transitions. [2024-09-12 22:12:37,277 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:37,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 184 transitions. [2024-09-12 22:12:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 22:12:37,278 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:37,279 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:37,290 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 22:12:37,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 22:12:37,481 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:37,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1941599551, now seen corresponding path program 2 times [2024-09-12 22:12:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:37,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998736833] [2024-09-12 22:12:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:37,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:37,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:37,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998736833] [2024-09-12 22:12:37,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998736833] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763628177] [2024-09-12 22:12:37,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:12:37,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:37,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:37,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:37,568 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:12:37,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:12:37,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:37,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 22:12:37,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:12:37,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:12:37,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763628177] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:37,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:37,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-09-12 22:12:37,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690931876] [2024-09-12 22:12:37,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:37,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 22:12:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:37,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 22:12:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-12 22:12:37,690 INFO L87 Difference]: Start difference. First operand 123 states and 184 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 22:12:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:38,299 INFO L93 Difference]: Finished difference Result 302 states and 459 transitions. [2024-09-12 22:12:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 22:12:38,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 22:12:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:38,302 INFO L225 Difference]: With dead ends: 302 [2024-09-12 22:12:38,302 INFO L226 Difference]: Without dead ends: 263 [2024-09-12 22:12:38,303 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 22:12:38,305 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 123 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:38,305 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 137 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:12:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-09-12 22:12:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2024-09-12 22:12:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.4966442953020134) internal successors, (223), 149 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 227 transitions. [2024-09-12 22:12:38,350 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 227 transitions. Word has length 22 [2024-09-12 22:12:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:38,350 INFO L474 AbstractCegarLoop]: Abstraction has 154 states and 227 transitions. [2024-09-12 22:12:38,350 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 22:12:38,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 227 transitions. [2024-09-12 22:12:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 22:12:38,351 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:38,352 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:38,364 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 22:12:38,552 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:38,552 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:38,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash -46385954, now seen corresponding path program 2 times [2024-09-12 22:12:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:38,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694702596] [2024-09-12 22:12:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:38,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:12:38,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:38,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694702596] [2024-09-12 22:12:38,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694702596] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:38,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800870356] [2024-09-12 22:12:38,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:12:38,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:38,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:38,613 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:38,615 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:12:38,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:12:38,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:38,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 22:12:38,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:12:38,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:12:38,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800870356] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:38,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:38,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-09-12 22:12:38,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596276651] [2024-09-12 22:12:38,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:38,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:12:38,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:38,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:12:38,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:12:38,687 INFO L87 Difference]: Start difference. First operand 154 states and 227 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:38,811 INFO L93 Difference]: Finished difference Result 242 states and 361 transitions. [2024-09-12 22:12:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:12:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 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 22:12:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:38,813 INFO L225 Difference]: With dead ends: 242 [2024-09-12 22:12:38,814 INFO L226 Difference]: Without dead ends: 181 [2024-09-12 22:12:38,815 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:12:38,816 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:38,816 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:12:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-12 22:12:38,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 151. [2024-09-12 22:12:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4726027397260273) internal successors, (215), 146 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 219 transitions. [2024-09-12 22:12:38,862 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 219 transitions. Word has length 24 [2024-09-12 22:12:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:38,862 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 219 transitions. [2024-09-12 22:12:38,862 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:38,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 219 transitions. [2024-09-12 22:12:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 22:12:38,864 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:38,864 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:38,878 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 22:12:39,066 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:39,067 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:39,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1697264410, now seen corresponding path program 1 times [2024-09-12 22:12:39,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:39,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497841996] [2024-09-12 22:12:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:39,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:39,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 22:12:39,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:39,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497841996] [2024-09-12 22:12:39,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497841996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:39,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935990634] [2024-09-12 22:12:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:39,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:39,141 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:39,141 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 22:12:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:39,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 22:12:39,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 22:12:39,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:12:39,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935990634] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:39,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:39,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-09-12 22:12:39,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196645827] [2024-09-12 22:12:39,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:39,268 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 22:12:39,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:39,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 22:12:39,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:12:39,269 INFO L87 Difference]: Start difference. First operand 151 states and 219 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 22:12:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:39,571 INFO L93 Difference]: Finished difference Result 222 states and 323 transitions. [2024-09-12 22:12:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 22:12:39,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 25 [2024-09-12 22:12:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:39,572 INFO L225 Difference]: With dead ends: 222 [2024-09-12 22:12:39,572 INFO L226 Difference]: Without dead ends: 180 [2024-09-12 22:12:39,573 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:12:39,573 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:39,573 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 191 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:12:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-12 22:12:39,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 147. [2024-09-12 22:12:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.471830985915493) internal successors, (209), 142 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 213 transitions. [2024-09-12 22:12:39,616 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 213 transitions. Word has length 25 [2024-09-12 22:12:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:39,616 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 213 transitions. [2024-09-12 22:12:39,616 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 22:12:39,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 213 transitions. [2024-09-12 22:12:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 22:12:39,618 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:39,618 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:39,631 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 22:12:39,818 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:39,819 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:39,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:39,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1008778426, now seen corresponding path program 3 times [2024-09-12 22:12:39,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:39,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277367630] [2024-09-12 22:12:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:39,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:39,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:39,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277367630] [2024-09-12 22:12:39,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277367630] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989308015] [2024-09-12 22:12:39,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:12:39,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:39,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:39,942 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:39,943 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 22:12:39,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:12:39,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:39,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 22:12:39,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:12:40,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:12:40,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989308015] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:40,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:40,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2024-09-12 22:12:40,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074980487] [2024-09-12 22:12:40,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:40,102 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 22:12:40,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:40,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 22:12:40,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:12:40,103 INFO L87 Difference]: Start difference. First operand 147 states and 213 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:41,277 INFO L93 Difference]: Finished difference Result 356 states and 535 transitions. [2024-09-12 22:12:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-12 22:12:41,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-12 22:12:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:41,278 INFO L225 Difference]: With dead ends: 356 [2024-09-12 22:12:41,278 INFO L226 Difference]: Without dead ends: 319 [2024-09-12 22:12:41,279 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2024-09-12 22:12:41,280 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 164 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:41,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 245 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:12:41,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-09-12 22:12:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 171. [2024-09-12 22:12:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4759036144578312) internal successors, (245), 166 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 249 transitions. [2024-09-12 22:12:41,329 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 249 transitions. Word has length 25 [2024-09-12 22:12:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:41,330 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 249 transitions. [2024-09-12 22:12:41,330 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:41,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 249 transitions. [2024-09-12 22:12:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 22:12:41,331 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:41,331 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:41,342 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:41,531 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 22:12:41,531 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:41,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:41,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1467722815, now seen corresponding path program 3 times [2024-09-12 22:12:41,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:41,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506619710] [2024-09-12 22:12:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:41,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:41,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 22:12:41,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:41,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506619710] [2024-09-12 22:12:41,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506619710] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:41,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438028436] [2024-09-12 22:12:41,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:12:41,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:41,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:41,600 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:41,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 22:12:41,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 22:12:41,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:41,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 22:12:41,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 22:12:41,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 22:12:41,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438028436] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:41,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:41,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-12 22:12:41,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845741215] [2024-09-12 22:12:41,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:41,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 22:12:41,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 22:12:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:12:41,697 INFO L87 Difference]: Start difference. First operand 171 states and 249 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 22:12:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:41,820 INFO L93 Difference]: Finished difference Result 259 states and 367 transitions. [2024-09-12 22:12:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 22:12:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 26 [2024-09-12 22:12:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:41,821 INFO L225 Difference]: With dead ends: 259 [2024-09-12 22:12:41,821 INFO L226 Difference]: Without dead ends: 247 [2024-09-12 22:12:41,822 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 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 22:12:41,822 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:41,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:12:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-12 22:12:41,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 186. [2024-09-12 22:12:41,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.4475138121546962) internal successors, (262), 181 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 266 transitions. [2024-09-12 22:12:41,890 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 266 transitions. Word has length 26 [2024-09-12 22:12:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:41,891 INFO L474 AbstractCegarLoop]: Abstraction has 186 states and 266 transitions. [2024-09-12 22:12:41,891 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 22:12:41,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 266 transitions. [2024-09-12 22:12:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 22:12:41,892 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:41,892 INFO L216 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:41,904 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 22:12:42,092 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-12 22:12:42,092 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:42,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:42,093 INFO L85 PathProgramCache]: Analyzing trace with hash 722284832, now seen corresponding path program 4 times [2024-09-12 22:12:42,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:42,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101963181] [2024-09-12 22:12:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:42,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:42,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:12:42,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:42,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101963181] [2024-09-12 22:12:42,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101963181] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:42,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569988799] [2024-09-12 22:12:42,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:12:42,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:42,182 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:42,183 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 22:12:42,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:12:42,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:42,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 22:12:42,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:12:42,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:12:42,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569988799] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:42,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:42,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-09-12 22:12:42,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075427280] [2024-09-12 22:12:42,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:42,324 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 22:12:42,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 22:12:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-09-12 22:12:42,324 INFO L87 Difference]: Start difference. First operand 186 states and 266 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:43,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:43,890 INFO L93 Difference]: Finished difference Result 454 states and 704 transitions. [2024-09-12 22:12:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-12 22:12:43,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-12 22:12:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:43,892 INFO L225 Difference]: With dead ends: 454 [2024-09-12 22:12:43,893 INFO L226 Difference]: Without dead ends: 382 [2024-09-12 22:12:43,894 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1233, Invalid=3597, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 22:12:43,894 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 427 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:43,895 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 303 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:12:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2024-09-12 22:12:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 236. [2024-09-12 22:12:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.4761904761904763) internal successors, (341), 231 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 345 transitions. [2024-09-12 22:12:43,990 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 345 transitions. Word has length 26 [2024-09-12 22:12:43,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:43,990 INFO L474 AbstractCegarLoop]: Abstraction has 236 states and 345 transitions. [2024-09-12 22:12:43,990 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:43,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 345 transitions. [2024-09-12 22:12:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 22:12:43,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:43,991 INFO L216 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:44,003 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:44,191 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:44,192 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:44,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:44,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1716429653, now seen corresponding path program 3 times [2024-09-12 22:12:44,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:44,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732307131] [2024-09-12 22:12:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:44,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:44,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:44,362 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 22:12:44,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:44,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732307131] [2024-09-12 22:12:44,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732307131] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:44,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331680618] [2024-09-12 22:12:44,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:12:44,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:44,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:44,364 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:44,364 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 22:12:44,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 22:12:44,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:44,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-12 22:12:44,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:44,421 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 22:12:44,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:44,638 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 22:12:44,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331680618] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:44,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:44,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-12 22:12:44,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930796953] [2024-09-12 22:12:44,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:44,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-12 22:12:44,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-12 22:12:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-09-12 22:12:44,639 INFO L87 Difference]: Start difference. First operand 236 states and 345 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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 22:12:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:48,268 INFO L93 Difference]: Finished difference Result 821 states and 1318 transitions. [2024-09-12 22:12:48,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-12 22:12:48,269 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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 27 [2024-09-12 22:12:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:48,272 INFO L225 Difference]: With dead ends: 821 [2024-09-12 22:12:48,272 INFO L226 Difference]: Without dead ends: 764 [2024-09-12 22:12:48,274 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2024-09-12 22:12:48,274 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 1322 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:48,274 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 865 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-12 22:12:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2024-09-12 22:12:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 380. [2024-09-12 22:12:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.5066666666666666) internal successors, (565), 375 states have internal predecessors, (565), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 569 transitions. [2024-09-12 22:12:48,449 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 569 transitions. Word has length 27 [2024-09-12 22:12:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:48,449 INFO L474 AbstractCegarLoop]: Abstraction has 380 states and 569 transitions. [2024-09-12 22:12:48,449 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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 22:12:48,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 569 transitions. [2024-09-12 22:12:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-12 22:12:48,450 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:48,450 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:48,462 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:48,650 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 22:12:48,651 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:48,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash 216651583, now seen corresponding path program 5 times [2024-09-12 22:12:48,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:48,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153546658] [2024-09-12 22:12:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:48,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:48,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:12:48,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:48,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153546658] [2024-09-12 22:12:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153546658] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:48,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636424625] [2024-09-12 22:12:48,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:12:48,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:48,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:48,957 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:48,958 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 22:12:49,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:12:49,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:49,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-12 22:12:49,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:49,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:12:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636424625] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:49,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:49,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 14] total 31 [2024-09-12 22:12:49,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878827683] [2024-09-12 22:12:49,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:49,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-12 22:12:49,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-12 22:12:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2024-09-12 22:12:49,767 INFO L87 Difference]: Start difference. First operand 380 states and 569 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 29 states have internal predecessors, (56), 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 22:12:53,850 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 22:12:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:55,473 INFO L93 Difference]: Finished difference Result 528 states and 742 transitions. [2024-09-12 22:12:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 22:12:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 29 states have internal predecessors, (56), 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 28 [2024-09-12 22:12:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:55,476 INFO L225 Difference]: With dead ends: 528 [2024-09-12 22:12:55,476 INFO L226 Difference]: Without dead ends: 434 [2024-09-12 22:12:55,478 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=292, Invalid=1778, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 22:12:55,479 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:55,480 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 215 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 631 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-09-12 22:12:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2024-09-12 22:12:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 358. [2024-09-12 22:12:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.4844192634560907) internal successors, (524), 353 states have internal predecessors, (524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 528 transitions. [2024-09-12 22:12:55,672 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 528 transitions. Word has length 28 [2024-09-12 22:12:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:55,673 INFO L474 AbstractCegarLoop]: Abstraction has 358 states and 528 transitions. [2024-09-12 22:12:55,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 29 states have internal predecessors, (56), 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 22:12:55,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 528 transitions. [2024-09-12 22:12:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-12 22:12:55,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:55,674 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:55,686 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 22:12:55,874 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 22:12:55,874 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:55,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash 302553951, now seen corresponding path program 4 times [2024-09-12 22:12:55,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:55,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459724798] [2024-09-12 22:12:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:55,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:55,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:12:55,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:55,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459724798] [2024-09-12 22:12:55,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459724798] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:55,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570415385] [2024-09-12 22:12:55,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:12:55,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:55,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:55,995 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:12:55,997 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 22:12:56,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:12:56,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:56,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:12:56,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:12:56,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:12:56,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570415385] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:56,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:56,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-12 22:12:56,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605673874] [2024-09-12 22:12:56,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:56,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 22:12:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:56,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 22:12:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:12:56,256 INFO L87 Difference]: Start difference. First operand 358 states and 528 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 22:12:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:58,953 INFO L93 Difference]: Finished difference Result 865 states and 1290 transitions. [2024-09-12 22:12:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-12 22:12:58,954 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 28 [2024-09-12 22:12:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:58,957 INFO L225 Difference]: With dead ends: 865 [2024-09-12 22:12:58,957 INFO L226 Difference]: Without dead ends: 793 [2024-09-12 22:12:58,959 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=926, Invalid=9994, Unknown=0, NotChecked=0, Total=10920 [2024-09-12 22:12:58,959 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 271 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:58,959 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 327 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 22:12:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2024-09-12 22:12:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 410. [2024-09-12 22:12:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 1.4987654320987653) internal successors, (607), 405 states have internal predecessors, (607), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 611 transitions. [2024-09-12 22:12:59,218 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 611 transitions. Word has length 28 [2024-09-12 22:12:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:59,218 INFO L474 AbstractCegarLoop]: Abstraction has 410 states and 611 transitions. [2024-09-12 22:12:59,219 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 22:12:59,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 611 transitions. [2024-09-12 22:12:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 22:12:59,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:59,219 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:59,231 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:59,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 22:12:59,424 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:59,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 997958656, now seen corresponding path program 6 times [2024-09-12 22:12:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:59,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735624847] [2024-09-12 22:12:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:59,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:59,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 22:12:59,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:59,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735624847] [2024-09-12 22:12:59,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735624847] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:59,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327775265] [2024-09-12 22:12:59,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:12:59,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:59,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:59,554 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 22:12:59,556 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 22:12:59,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-12 22:12:59,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:59,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:12:59,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 22:12:59,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 22:12:59,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327775265] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:59,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:59,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2024-09-12 22:12:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071447143] [2024-09-12 22:12:59,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:59,680 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 22:12:59,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:59,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 22:12:59,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-12 22:12:59,680 INFO L87 Difference]: Start difference. First operand 410 states and 611 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:00,331 INFO L93 Difference]: Finished difference Result 672 states and 978 transitions. [2024-09-12 22:13:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 22:13:00,331 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-12 22:13:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:00,334 INFO L225 Difference]: With dead ends: 672 [2024-09-12 22:13:00,334 INFO L226 Difference]: Without dead ends: 642 [2024-09-12 22:13:00,335 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:13:00,335 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:00,335 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 165 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:13:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2024-09-12 22:13:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 413. [2024-09-12 22:13:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 408 states have (on average 1.4877450980392157) internal successors, (607), 408 states have internal predecessors, (607), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 611 transitions. [2024-09-12 22:13:00,627 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 611 transitions. Word has length 30 [2024-09-12 22:13:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:00,627 INFO L474 AbstractCegarLoop]: Abstraction has 413 states and 611 transitions. [2024-09-12 22:13:00,627 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:00,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 611 transitions. [2024-09-12 22:13:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 22:13:00,628 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:00,628 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:00,643 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:00,828 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 22:13:00,828 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:00,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:00,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1736256998, now seen corresponding path program 5 times [2024-09-12 22:13:00,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:00,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032802989] [2024-09-12 22:13:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:00,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:01,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:13:01,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032802989] [2024-09-12 22:13:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032802989] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691816537] [2024-09-12 22:13:01,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:13:01,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:01,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:01,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:01,025 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 22:13:01,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 22:13:01,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:01,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 22:13:01,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:13:01,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:13:01,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691816537] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:01,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:01,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 32 [2024-09-12 22:13:01,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685418534] [2024-09-12 22:13:01,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:01,361 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 22:13:01,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 22:13:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2024-09-12 22:13:01,362 INFO L87 Difference]: Start difference. First operand 413 states and 611 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:04,001 INFO L93 Difference]: Finished difference Result 1049 states and 1576 transitions. [2024-09-12 22:13:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-12 22:13:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-12 22:13:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:04,005 INFO L225 Difference]: With dead ends: 1049 [2024-09-12 22:13:04,005 INFO L226 Difference]: Without dead ends: 975 [2024-09-12 22:13:04,006 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1727, Invalid=5413, Unknown=0, NotChecked=0, Total=7140 [2024-09-12 22:13:04,006 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 305 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:04,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 514 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 22:13:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2024-09-12 22:13:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 484. [2024-09-12 22:13:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 479 states have (on average 1.4968684759916493) internal successors, (717), 479 states have internal predecessors, (717), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 721 transitions. [2024-09-12 22:13:04,386 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 721 transitions. Word has length 31 [2024-09-12 22:13:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:04,386 INFO L474 AbstractCegarLoop]: Abstraction has 484 states and 721 transitions. [2024-09-12 22:13:04,386 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:04,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 721 transitions. [2024-09-12 22:13:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 22:13:04,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:04,387 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:04,399 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:04,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:04,591 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:04,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1362411958, now seen corresponding path program 6 times [2024-09-12 22:13:04,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:04,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783351580] [2024-09-12 22:13:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:04,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:04,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:13:04,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783351580] [2024-09-12 22:13:04,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783351580] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718700430] [2024-09-12 22:13:04,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:13:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:04,748 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:04,749 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 22:13:04,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 22:13:04,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:04,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 22:13:04,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 22:13:04,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 22:13:05,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718700430] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:05,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:05,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2024-09-12 22:13:05,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905070551] [2024-09-12 22:13:05,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:05,090 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 22:13:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 22:13:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:13:05,090 INFO L87 Difference]: Start difference. First operand 484 states and 721 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:08,356 INFO L93 Difference]: Finished difference Result 1054 states and 1529 transitions. [2024-09-12 22:13:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-12 22:13:08,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-12 22:13:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:08,359 INFO L225 Difference]: With dead ends: 1054 [2024-09-12 22:13:08,359 INFO L226 Difference]: Without dead ends: 962 [2024-09-12 22:13:08,361 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=989, Invalid=8517, Unknown=0, NotChecked=0, Total=9506 [2024-09-12 22:13:08,361 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 384 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:08,362 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 429 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 22:13:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2024-09-12 22:13:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 510. [2024-09-12 22:13:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 505 states have (on average 1.491089108910891) internal successors, (753), 505 states have internal predecessors, (753), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 757 transitions. [2024-09-12 22:13:08,748 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 757 transitions. Word has length 33 [2024-09-12 22:13:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:08,749 INFO L474 AbstractCegarLoop]: Abstraction has 510 states and 757 transitions. [2024-09-12 22:13:08,749 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:08,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 757 transitions. [2024-09-12 22:13:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 22:13:08,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:08,750 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:08,762 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-12 22:13:08,950 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:08,951 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:08,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1741060780, now seen corresponding path program 7 times [2024-09-12 22:13:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557671868] [2024-09-12 22:13:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:09,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:13:09,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:09,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557671868] [2024-09-12 22:13:09,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557671868] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:09,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592224640] [2024-09-12 22:13:09,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:13:09,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:09,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:09,137 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:09,139 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 22:13:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:09,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-12 22:13:09,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:13:09,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:13:09,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592224640] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:09,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:09,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-12 22:13:09,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170266446] [2024-09-12 22:13:09,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:09,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 22:13:09,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:09,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 22:13:09,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 22:13:09,457 INFO L87 Difference]: Start difference. First operand 510 states and 757 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:20,429 INFO L93 Difference]: Finished difference Result 1408 states and 2227 transitions. [2024-09-12 22:13:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-09-12 22:13:20,430 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 22:13:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:20,434 INFO L225 Difference]: With dead ends: 1408 [2024-09-12 22:13:20,434 INFO L226 Difference]: Without dead ends: 1236 [2024-09-12 22:13:20,436 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7998 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=5551, Invalid=15329, Unknown=0, NotChecked=0, Total=20880 [2024-09-12 22:13:20,436 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 1663 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:20,436 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1663 Valid, 1043 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-12 22:13:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2024-09-12 22:13:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 561. [2024-09-12 22:13:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 556 states have (on average 1.485611510791367) internal successors, (826), 556 states have internal predecessors, (826), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 830 transitions. [2024-09-12 22:13:20,938 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 830 transitions. Word has length 33 [2024-09-12 22:13:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:20,939 INFO L474 AbstractCegarLoop]: Abstraction has 561 states and 830 transitions. [2024-09-12 22:13:20,939 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:20,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 830 transitions. [2024-09-12 22:13:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 22:13:20,940 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:20,941 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:20,954 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:21,141 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:21,142 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:21,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash -906855808, now seen corresponding path program 8 times [2024-09-12 22:13:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:21,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660026573] [2024-09-12 22:13:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:21,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:21,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:13:21,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:21,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660026573] [2024-09-12 22:13:21,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660026573] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:21,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704052644] [2024-09-12 22:13:21,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:13:21,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:21,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:21,625 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:21,626 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 22:13:21,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:13:21,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:21,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-12 22:13:21,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:13:22,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:13:22,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704052644] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:22,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:22,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 14] total 39 [2024-09-12 22:13:22,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353726102] [2024-09-12 22:13:22,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:22,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 22:13:22,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 22:13:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 22:13:22,789 INFO L87 Difference]: Start difference. First operand 561 states and 830 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 37 states have internal predecessors, (74), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:26,517 INFO L93 Difference]: Finished difference Result 762 states and 1064 transitions. [2024-09-12 22:13:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-12 22:13:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 37 states have internal predecessors, (74), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-12 22:13:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:26,520 INFO L225 Difference]: With dead ends: 762 [2024-09-12 22:13:26,520 INFO L226 Difference]: Without dead ends: 644 [2024-09-12 22:13:26,521 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=535, Invalid=4021, Unknown=0, NotChecked=0, Total=4556 [2024-09-12 22:13:26,522 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:26,522 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 222 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-12 22:13:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2024-09-12 22:13:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 532. [2024-09-12 22:13:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 527 states have (on average 1.4743833017077799) internal successors, (777), 527 states have internal predecessors, (777), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 781 transitions. [2024-09-12 22:13:27,015 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 781 transitions. Word has length 34 [2024-09-12 22:13:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:27,015 INFO L474 AbstractCegarLoop]: Abstraction has 532 states and 781 transitions. [2024-09-12 22:13:27,016 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 37 states have internal predecessors, (74), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:27,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:27,016 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 781 transitions. [2024-09-12 22:13:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 22:13:27,016 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:27,017 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:27,038 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 22:13:27,217 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-12 22:13:27,217 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:27,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:27,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1249736321, now seen corresponding path program 7 times [2024-09-12 22:13:27,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:27,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343885592] [2024-09-12 22:13:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:27,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:27,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:13:27,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:27,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343885592] [2024-09-12 22:13:27,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343885592] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:27,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381902460] [2024-09-12 22:13:27,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:13:27,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:27,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:27,428 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:27,429 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 22:13:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:27,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:13:27,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:13:27,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 22:13:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381902460] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:27,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:27,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2024-09-12 22:13:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287069040] [2024-09-12 22:13:27,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:27,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-12 22:13:27,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:27,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-12 22:13:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2024-09-12 22:13:27,722 INFO L87 Difference]: Start difference. First operand 532 states and 781 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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 22:13:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:32,155 INFO L93 Difference]: Finished difference Result 1793 states and 2748 transitions. [2024-09-12 22:13:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-12 22:13:32,155 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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 34 [2024-09-12 22:13:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:32,160 INFO L225 Difference]: With dead ends: 1793 [2024-09-12 22:13:32,160 INFO L226 Difference]: Without dead ends: 1702 [2024-09-12 22:13:32,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1644, Invalid=7668, Unknown=0, NotChecked=0, Total=9312 [2024-09-12 22:13:32,161 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 342 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:32,162 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 889 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2729 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 22:13:32,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2024-09-12 22:13:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 708. [2024-09-12 22:13:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 703 states have (on average 1.496443812233286) internal successors, (1052), 703 states have internal predecessors, (1052), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1056 transitions. [2024-09-12 22:13:32,899 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1056 transitions. Word has length 34 [2024-09-12 22:13:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:32,899 INFO L474 AbstractCegarLoop]: Abstraction has 708 states and 1056 transitions. [2024-09-12 22:13:32,899 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 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 22:13:32,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1056 transitions. [2024-09-12 22:13:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 22:13:32,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:32,901 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:32,913 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:33,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-12 22:13:33,101 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:33,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:33,101 INFO L85 PathProgramCache]: Analyzing trace with hash 572674207, now seen corresponding path program 9 times [2024-09-12 22:13:33,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:33,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584459722] [2024-09-12 22:13:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:33,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:33,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-12 22:13:33,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:33,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584459722] [2024-09-12 22:13:33,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584459722] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:33,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428752820] [2024-09-12 22:13:33,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:13:33,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:33,253 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:33,255 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 22:13:33,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:13:33,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:33,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 22:13:33,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 22:13:33,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 22:13:33,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428752820] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:33,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:33,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-12 22:13:33,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761616477] [2024-09-12 22:13:33,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:33,514 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 22:13:33,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 22:13:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:13:33,514 INFO L87 Difference]: Start difference. First operand 708 states and 1056 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 22:13:38,263 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 22:13:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:39,987 INFO L93 Difference]: Finished difference Result 1782 states and 2675 transitions. [2024-09-12 22:13:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 22:13:39,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 36 [2024-09-12 22:13:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:39,992 INFO L225 Difference]: With dead ends: 1782 [2024-09-12 22:13:39,992 INFO L226 Difference]: Without dead ends: 1518 [2024-09-12 22:13:39,993 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:13:39,994 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 188 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:39,994 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 238 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 108 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-09-12 22:13:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2024-09-12 22:13:40,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 875. [2024-09-12 22:13:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 870 states have (on average 1.5114942528735633) internal successors, (1315), 870 states have internal predecessors, (1315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1319 transitions. [2024-09-12 22:13:40,865 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1319 transitions. Word has length 36 [2024-09-12 22:13:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:40,866 INFO L474 AbstractCegarLoop]: Abstraction has 875 states and 1319 transitions. [2024-09-12 22:13:40,866 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 22:13:40,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1319 transitions. [2024-09-12 22:13:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 22:13:40,867 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:40,867 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:40,880 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 22:13:41,071 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:41,071 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:41,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1567952235, now seen corresponding path program 10 times [2024-09-12 22:13:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:41,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532847805] [2024-09-12 22:13:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:41,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:41,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 22:13:41,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:41,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532847805] [2024-09-12 22:13:41,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532847805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:41,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414283081] [2024-09-12 22:13:41,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:13:41,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:41,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:41,205 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:41,207 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 22:13:41,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:13:41,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:41,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 22:13:41,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 22:13:41,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:13:41,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414283081] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:41,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:41,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 22 [2024-09-12 22:13:41,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547245822] [2024-09-12 22:13:41,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:41,387 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 22:13:41,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:41,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 22:13:41,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:13:41,387 INFO L87 Difference]: Start difference. First operand 875 states and 1319 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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 22:13:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:43,285 INFO L93 Difference]: Finished difference Result 1190 states and 1698 transitions. [2024-09-12 22:13:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-12 22:13:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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 37 [2024-09-12 22:13:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:43,289 INFO L225 Difference]: With dead ends: 1190 [2024-09-12 22:13:43,289 INFO L226 Difference]: Without dead ends: 1017 [2024-09-12 22:13:43,290 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=2439, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 22:13:43,290 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 81 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:43,290 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 414 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:13:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2024-09-12 22:13:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 859. [2024-09-12 22:13:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 854 states have (on average 1.4976580796252927) internal successors, (1279), 854 states have internal predecessors, (1279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1283 transitions. [2024-09-12 22:13:44,150 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1283 transitions. Word has length 37 [2024-09-12 22:13:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:44,150 INFO L474 AbstractCegarLoop]: Abstraction has 859 states and 1283 transitions. [2024-09-12 22:13:44,150 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 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 22:13:44,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1283 transitions. [2024-09-12 22:13:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 22:13:44,151 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:44,152 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:44,163 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-12 22:13:44,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-12 22:13:44,352 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:44,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1064696843, now seen corresponding path program 2 times [2024-09-12 22:13:44,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433732539] [2024-09-12 22:13:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:44,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-12 22:13:44,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:44,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433732539] [2024-09-12 22:13:44,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433732539] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:44,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194837384] [2024-09-12 22:13:44,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:13:44,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:44,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:44,553 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:44,560 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 22:13:44,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:13:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:44,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-12 22:13:44,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:13:44,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-12 22:13:44,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194837384] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:44,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:44,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 10] total 27 [2024-09-12 22:13:44,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891488808] [2024-09-12 22:13:44,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:44,868 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 22:13:44,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 22:13:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2024-09-12 22:13:44,869 INFO L87 Difference]: Start difference. First operand 859 states and 1283 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:49,375 INFO L93 Difference]: Finished difference Result 1708 states and 2444 transitions. [2024-09-12 22:13:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-12 22:13:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-12 22:13:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:49,380 INFO L225 Difference]: With dead ends: 1708 [2024-09-12 22:13:49,380 INFO L226 Difference]: Without dead ends: 1586 [2024-09-12 22:13:49,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2076, Invalid=8430, Unknown=0, NotChecked=0, Total=10506 [2024-09-12 22:13:49,381 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 371 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 2744 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:49,381 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 684 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2744 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 22:13:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2024-09-12 22:13:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 936. [2024-09-12 22:13:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 931 states have (on average 1.4951664876476907) internal successors, (1392), 931 states have internal predecessors, (1392), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1396 transitions. [2024-09-12 22:13:50,455 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1396 transitions. Word has length 39 [2024-09-12 22:13:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:50,456 INFO L474 AbstractCegarLoop]: Abstraction has 936 states and 1396 transitions. [2024-09-12 22:13:50,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:50,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1396 transitions. [2024-09-12 22:13:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 22:13:50,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:50,457 INFO L216 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:50,470 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-12 22:13:50,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-12 22:13:50,658 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:50,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:50,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1900096203, now seen corresponding path program 11 times [2024-09-12 22:13:50,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:50,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489604688] [2024-09-12 22:13:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:50,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:50,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 22:13:50,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489604688] [2024-09-12 22:13:50,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489604688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653339243] [2024-09-12 22:13:50,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:13:50,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:50,848 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:13:50,849 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 22:13:50,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 22:13:50,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:50,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-12 22:13:50,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:13:50,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:13:51,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653339243] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:51,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:51,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 33 [2024-09-12 22:13:51,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055121473] [2024-09-12 22:13:51,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:51,221 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 22:13:51,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 22:13:51,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 22:13:51,223 INFO L87 Difference]: Start difference. First operand 936 states and 1396 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:59,993 INFO L93 Difference]: Finished difference Result 2428 states and 3749 transitions. [2024-09-12 22:13:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-09-12 22:13:59,994 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 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 22:13:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:59,999 INFO L225 Difference]: With dead ends: 2428 [2024-09-12 22:13:59,999 INFO L226 Difference]: Without dead ends: 2051 [2024-09-12 22:14:00,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2356, Invalid=5126, Unknown=0, NotChecked=0, Total=7482 [2024-09-12 22:14:00,001 INFO L434 NwaCegarLoop]: 77 mSDtfsCounter, 1263 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:00,001 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 1196 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-12 22:14:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2024-09-12 22:14:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1033. [2024-09-12 22:14:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1028 states have (on average 1.4990272373540856) internal successors, (1541), 1028 states have internal predecessors, (1541), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1545 transitions. [2024-09-12 22:14:01,217 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1545 transitions. Word has length 39 [2024-09-12 22:14:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:14:01,217 INFO L474 AbstractCegarLoop]: Abstraction has 1033 states and 1545 transitions. [2024-09-12 22:14:01,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:01,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1545 transitions. [2024-09-12 22:14:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 22:14:01,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:14:01,218 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:14:01,235 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-12 22:14:01,418 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-12 22:14:01,419 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:14:01,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:01,419 INFO L85 PathProgramCache]: Analyzing trace with hash 171159391, now seen corresponding path program 12 times [2024-09-12 22:14:01,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:14:01,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904991062] [2024-09-12 22:14:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:14:01,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:14:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:01,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:14:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:14:01,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:14:01,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904991062] [2024-09-12 22:14:01,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904991062] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:14:01,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749072868] [2024-09-12 22:14:01,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:14:01,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:01,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:14:01,952 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:14:01,953 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-12 22:14:02,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-12 22:14:02,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:14:02,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-12 22:14:02,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:14:02,918 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 22:14:02,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:14:04,072 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 22:14:04,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749072868] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:14:04,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:14:04,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28, 27] total 58 [2024-09-12 22:14:04,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221871502] [2024-09-12 22:14:04,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:14:04,073 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-12 22:14:04,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:14:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-12 22:14:04,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=2846, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 22:14:04,074 INFO L87 Difference]: Start difference. First operand 1033 states and 1545 transitions. Second operand has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 56 states have internal predecessors, (88), 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 22:14:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:14:13,470 INFO L93 Difference]: Finished difference Result 1535 states and 2128 transitions. [2024-09-12 22:14:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-12 22:14:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 56 states have internal predecessors, (88), 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 40 [2024-09-12 22:14:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:14:13,475 INFO L225 Difference]: With dead ends: 1535 [2024-09-12 22:14:13,475 INFO L226 Difference]: Without dead ends: 1504 [2024-09-12 22:14:13,476 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1308, Invalid=7812, Unknown=0, NotChecked=0, Total=9120 [2024-09-12 22:14:13,476 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:13,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 353 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-12 22:14:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2024-09-12 22:14:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1017. [2024-09-12 22:14:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1012 states have (on average 1.5059288537549407) internal successors, (1524), 1012 states have internal predecessors, (1524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1528 transitions. [2024-09-12 22:14:14,778 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1528 transitions. Word has length 40 [2024-09-12 22:14:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:14:14,779 INFO L474 AbstractCegarLoop]: Abstraction has 1017 states and 1528 transitions. [2024-09-12 22:14:14,779 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 56 states have internal predecessors, (88), 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 22:14:14,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:14,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1528 transitions. [2024-09-12 22:14:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 22:14:14,780 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:14:14,780 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:14:14,793 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 22:14:14,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-12 22:14:14,981 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:14:14,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1585091015, now seen corresponding path program 3 times [2024-09-12 22:14:14,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:14:14,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070871392] [2024-09-12 22:14:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:14:14,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:14:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:15,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:14:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:14:15,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:14:15,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070871392] [2024-09-12 22:14:15,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070871392] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:14:15,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865645108] [2024-09-12 22:14:15,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:14:15,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:15,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:14:15,296 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 22:14:15,297 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 22:14:15,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 22:14:15,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:14:15,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 22:14:15,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:14:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-12 22:14:15,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:14:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-12 22:14:15,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865645108] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:14:15,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:14:15,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2024-09-12 22:14:15,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045877300] [2024-09-12 22:14:15,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:14:15,942 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:14:15,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:14:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:14:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:14:15,942 INFO L87 Difference]: Start difference. First operand 1017 states and 1528 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:14:39,779 INFO L93 Difference]: Finished difference Result 2849 states and 3992 transitions. [2024-09-12 22:14:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 398 states. [2024-09-12 22:14:39,780 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-12 22:14:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:14:39,788 INFO L225 Difference]: With dead ends: 2849 [2024-09-12 22:14:39,788 INFO L226 Difference]: Without dead ends: 2689 [2024-09-12 22:14:39,817 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 69 SyntacticMatches, 16 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77062 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=7170, Invalid=171336, Unknown=0, NotChecked=0, Total=178506 [2024-09-12 22:14:39,817 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 1012 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 5681 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 6804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 5681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:14:39,817 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 675 Invalid, 6804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 5681 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-12 22:14:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2024-09-12 22:14:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 1022. [2024-09-12 22:14:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1017 states have (on average 1.4926253687315634) internal successors, (1518), 1017 states have internal predecessors, (1518), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1522 transitions. [2024-09-12 22:14:41,398 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1522 transitions. Word has length 41 [2024-09-12 22:14:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:14:41,398 INFO L474 AbstractCegarLoop]: Abstraction has 1022 states and 1522 transitions. [2024-09-12 22:14:41,398 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:41,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1522 transitions. [2024-09-12 22:14:41,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:14:41,399 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:14:41,399 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:14:41,423 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-12 22:14:41,600 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:41,600 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:14:41,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:14:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1706754144, now seen corresponding path program 13 times [2024-09-12 22:14:41,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:14:41,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997267246] [2024-09-12 22:14:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:14:41,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:14:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:41,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:14:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 22:14:41,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:14:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997267246] [2024-09-12 22:14:41,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997267246] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:14:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741523321] [2024-09-12 22:14:41,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:14:41,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:14:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:14:41,784 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 22:14:41,785 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 22:14:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:14:41,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 22:14:41,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:14:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 22:14:41,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:14:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 22:14:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741523321] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:14:42,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:14:42,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 24 [2024-09-12 22:14:42,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716376750] [2024-09-12 22:14:42,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:14:42,018 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 22:14:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:14:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 22:14:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:14:42,018 INFO L87 Difference]: Start difference. First operand 1022 states and 1522 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:14:50,185 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 43 DAG size of output: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:14:58,331 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 38 DAG size of output: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:15:06,414 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:15:14,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:22,762 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:15:30,992 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:15:39,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:15:47,932 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:16:01,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:05,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:09,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:13,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:29,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:33,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:16:37,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:14,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:18,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:22,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:26,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:42,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:46,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:50,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:54,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:58,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:18:03,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:18:07,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:18:11,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:18:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:18:14,043 INFO L93 Difference]: Finished difference Result 2885 states and 4277 transitions. [2024-09-12 22:18:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-12 22:18:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 22:18:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:18:14,050 INFO L225 Difference]: With dead ends: 2885 [2024-09-12 22:18:14,050 INFO L226 Difference]: Without dead ends: 2585 [2024-09-12 22:18:14,051 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 122.0s TimeCoverageRelationStatistics Valid=749, Invalid=1689, Unknown=12, NotChecked=0, Total=2450 [2024-09-12 22:18:14,052 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 293 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 155 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:18:14,052 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 355 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 189 Invalid, 21 Unknown, 0 Unchecked, 84.3s Time] [2024-09-12 22:18:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2024-09-12 22:18:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 1258. [2024-09-12 22:18:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1253 states have (on average 1.4980047885075818) internal successors, (1877), 1253 states have internal predecessors, (1877), 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 22:18:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1881 transitions. [2024-09-12 22:18:15,828 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1881 transitions. Word has length 42 [2024-09-12 22:18:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:18:15,828 INFO L474 AbstractCegarLoop]: Abstraction has 1258 states and 1881 transitions. [2024-09-12 22:18:15,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:18:15,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:18:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1881 transitions. [2024-09-12 22:18:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:18:15,830 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:18:15,830 INFO L216 NwaCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:18:15,842 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-12 22:18:16,030 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-12 22:18:16,030 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:18:16,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:18:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash -783545697, now seen corresponding path program 4 times [2024-09-12 22:18:16,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:18:16,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825953089] [2024-09-12 22:18:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:18:16,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:18:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:18:16,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:18:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:18:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:18:16,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:18:16,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825953089] [2024-09-12 22:18:16,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825953089] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:18:16,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620716605] [2024-09-12 22:18:16,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:18:16,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:18:16,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:18:16,397 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 22:18:16,398 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 22:18:16,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:18:16,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:18:16,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-12 22:18:16,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:18:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:18:16,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:18:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:18:17,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620716605] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:18:17,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:18:17,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2024-09-12 22:18:17,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674114434] [2024-09-12 22:18:17,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:18:17,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-12 22:18:17,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:18:17,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-12 22:18:17,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=2576, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 22:18:17,369 INFO L87 Difference]: Start difference. First operand 1258 states and 1881 transitions. Second operand has 59 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:19:23,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:19:23,462 INFO L93 Difference]: Finished difference Result 7398 states and 12786 transitions. [2024-09-12 22:19:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-09-12 22:19:23,463 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 22:19:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:19:23,482 INFO L225 Difference]: With dead ends: 7398 [2024-09-12 22:19:23,482 INFO L226 Difference]: Without dead ends: 6994 [2024-09-12 22:19:23,485 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=7972, Invalid=17468, Unknown=0, NotChecked=0, Total=25440 [2024-09-12 22:19:23,485 INFO L434 NwaCegarLoop]: 133 mSDtfsCounter, 5152 mSDsluCounter, 3649 mSDsCounter, 0 mSdLazyCounter, 4703 mSolverCounterSat, 2846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5152 SdHoareTripleChecker+Valid, 3782 SdHoareTripleChecker+Invalid, 7549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2846 IncrementalHoareTripleChecker+Valid, 4703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:19:23,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5152 Valid, 3782 Invalid, 7549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2846 Valid, 4703 Invalid, 0 Unknown, 0 Unchecked, 20.7s Time] [2024-09-12 22:19:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6994 states. [2024-09-12 22:19:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6994 to 2133. [2024-09-12 22:19:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2128 states have (on average 1.5046992481203008) internal successors, (3202), 2128 states have internal predecessors, (3202), 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 22:19:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 3206 transitions. [2024-09-12 22:19:27,429 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 3206 transitions. Word has length 42 [2024-09-12 22:19:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:19:27,430 INFO L474 AbstractCegarLoop]: Abstraction has 2133 states and 3206 transitions. [2024-09-12 22:19:27,430 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:19:27,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 3206 transitions. [2024-09-12 22:19:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 22:19:27,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:19:27,431 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:19:27,443 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 22:19:27,632 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:19:27,632 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:19:27,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1537036864, now seen corresponding path program 14 times [2024-09-12 22:19:27,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:19:27,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682592235] [2024-09-12 22:19:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:19:27,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:19:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:27,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:19:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 22:19:27,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:19:27,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682592235] [2024-09-12 22:19:27,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682592235] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:19:27,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742458795] [2024-09-12 22:19:27,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:19:27,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:19:27,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:19:27,796 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 22:19:27,797 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 22:19:27,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:19:27,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:19:27,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 22:19:27,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:19:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 22:19:27,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:19:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-12 22:19:28,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742458795] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:19:28,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:19:28,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 10] total 28 [2024-09-12 22:19:28,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733996690] [2024-09-12 22:19:28,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:19:28,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 22:19:28,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:19:28,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 22:19:28,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-09-12 22:19:28,051 INFO L87 Difference]: Start difference. First operand 2133 states and 3206 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 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 22:19:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:19:35,248 INFO L93 Difference]: Finished difference Result 2748 states and 3929 transitions. [2024-09-12 22:19:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-12 22:19:35,249 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 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 44 [2024-09-12 22:19:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:19:35,254 INFO L225 Difference]: With dead ends: 2748 [2024-09-12 22:19:35,254 INFO L226 Difference]: Without dead ends: 2398 [2024-09-12 22:19:35,255 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=639, Invalid=6167, Unknown=0, NotChecked=0, Total=6806 [2024-09-12 22:19:35,255 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 123 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:19:35,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 776 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 22:19:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2024-09-12 22:19:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 2081. [2024-09-12 22:19:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2076 states have (on average 1.4995183044315992) internal successors, (3113), 2076 states have internal predecessors, (3113), 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 22:19:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3117 transitions. [2024-09-12 22:19:39,064 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3117 transitions. Word has length 44 [2024-09-12 22:19:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:19:39,064 INFO L474 AbstractCegarLoop]: Abstraction has 2081 states and 3117 transitions. [2024-09-12 22:19:39,064 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 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 22:19:39,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3117 transitions. [2024-09-12 22:19:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 22:19:39,066 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:19:39,066 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:19:39,077 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 22:19:39,266 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:19:39,266 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:19:39,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:39,267 INFO L85 PathProgramCache]: Analyzing trace with hash -705458464, now seen corresponding path program 15 times [2024-09-12 22:19:39,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:19:39,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437526411] [2024-09-12 22:19:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:19:39,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:19:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:39,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:19:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:19:39,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:19:39,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437526411] [2024-09-12 22:19:39,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437526411] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:19:39,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478782343] [2024-09-12 22:19:39,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:19:39,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:19:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:19:39,879 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 22:19:39,881 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 22:19:39,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:19:39,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:19:39,972 WARN L260 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-09-12 22:19:39,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:19:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:19:41,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:19:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:19:41,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478782343] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:19:41,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:19:41,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32, 17] total 54 [2024-09-12 22:19:41,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679592599] [2024-09-12 22:19:41,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:19:41,948 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 22:19:41,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:19:41,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 22:19:41,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2550, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 22:19:41,949 INFO L87 Difference]: Start difference. First operand 2081 states and 3117 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 52 states have internal predecessors, (105), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:19:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:19:50,425 INFO L93 Difference]: Finished difference Result 2318 states and 3385 transitions. [2024-09-12 22:19:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-12 22:19:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 52 states have internal predecessors, (105), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-12 22:19:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:19:50,430 INFO L225 Difference]: With dead ends: 2318 [2024-09-12 22:19:50,430 INFO L226 Difference]: Without dead ends: 2282 [2024-09-12 22:19:50,431 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1764 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=847, Invalid=6635, Unknown=0, NotChecked=0, Total=7482 [2024-09-12 22:19:50,431 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:19:50,431 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 204 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 22:19:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2024-09-12 22:19:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2062. [2024-09-12 22:19:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2057 states have (on average 1.503646086533787) internal successors, (3093), 2057 states have internal predecessors, (3093), 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 22:19:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3097 transitions. [2024-09-12 22:19:54,224 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3097 transitions. Word has length 46 [2024-09-12 22:19:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:19:54,224 INFO L474 AbstractCegarLoop]: Abstraction has 2062 states and 3097 transitions. [2024-09-12 22:19:54,224 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 52 states have internal predecessors, (105), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:19:54,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3097 transitions. [2024-09-12 22:19:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 22:19:54,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:19:54,226 INFO L216 NwaCegarLoop]: trace histogram [12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:19:54,242 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 22:19:54,426 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-12 22:19:54,427 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:19:54,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:19:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash -648053877, now seen corresponding path program 4 times [2024-09-12 22:19:54,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:19:54,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542982951] [2024-09-12 22:19:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:19:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:19:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:54,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:19:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:19:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-12 22:19:54,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:19:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542982951] [2024-09-12 22:19:54,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542982951] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:19:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302678971] [2024-09-12 22:19:54,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:19:54,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:19:54,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:19:54,668 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 22:19:54,669 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 22:19:54,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:19:54,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:19:54,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 22:19:54,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:19:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-12 22:19:54,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:19:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-12 22:19:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302678971] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:19:55,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:19:55,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 25] total 48 [2024-09-12 22:19:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707825035] [2024-09-12 22:19:55,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:19:55,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 22:19:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:19:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 22:19:55,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1911, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 22:19:55,417 INFO L87 Difference]: Start difference. First operand 2062 states and 3097 transitions. Second operand has 48 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 2 states have call successors, (3), 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 22:23:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:23:42,504 INFO L93 Difference]: Finished difference Result 6525 states and 9495 transitions. [2024-09-12 22:23:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1307 states. [2024-09-12 22:23:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 2 states have call successors, (3), 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 22:23:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:23:42,518 INFO L225 Difference]: With dead ends: 6525 [2024-09-12 22:23:42,518 INFO L226 Difference]: Without dead ends: 6159 [2024-09-12 22:23:42,609 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 1317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863527 ImplicationChecksByTransitivity, 188.5s TimeCoverageRelationStatistics Valid=175748, Invalid=1562694, Unknown=0, NotChecked=0, Total=1738442 [2024-09-12 22:23:42,610 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 4987 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 5937 mSolverCounterSat, 4863 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4987 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 10800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4863 IncrementalHoareTripleChecker+Valid, 5937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:23:42,610 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4987 Valid, 1506 Invalid, 10800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4863 Valid, 5937 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2024-09-12 22:23:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6159 states. [2024-09-12 22:23:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6159 to 3496. [2024-09-12 22:23:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3491 states have (on average 1.5986823259810943) internal successors, (5581), 3491 states have internal predecessors, (5581), 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 22:23:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 5585 transitions. [2024-09-12 22:23:52,334 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 5585 transitions. Word has length 47 [2024-09-12 22:23:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:23:52,334 INFO L474 AbstractCegarLoop]: Abstraction has 3496 states and 5585 transitions. [2024-09-12 22:23:52,334 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 2 states have call successors, (3), 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 22:23:52,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:23:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 5585 transitions. [2024-09-12 22:23:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 22:23:52,336 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:23:52,336 INFO L216 NwaCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:23:52,348 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-12 22:23:52,537 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:23:52,537 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:23:52,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:23:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash 89907616, now seen corresponding path program 16 times [2024-09-12 22:23:52,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:23:52,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587646202] [2024-09-12 22:23:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:23:52,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:23:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:23:53,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:23:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:23:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:23:53,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:23:53,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587646202] [2024-09-12 22:23:53,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587646202] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:23:53,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185218422] [2024-09-12 22:23:53,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:23:53,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:23:53,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:23:53,054 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 22:23:53,055 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 22:23:53,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:23:53,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:23:53,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-12 22:23:53,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:23:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:23:53,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:23:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:23:54,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185218422] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:23:54,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:23:54,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2024-09-12 22:23:54,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264115101] [2024-09-12 22:23:54,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:23:54,214 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-12 22:23:54,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:23:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-12 22:23:54,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=913, Invalid=2993, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 22:23:54,216 INFO L87 Difference]: Start difference. First operand 3496 states and 5585 transitions. Second operand has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 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 22:26:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:37,788 INFO L93 Difference]: Finished difference Result 10204 states and 17246 transitions. [2024-09-12 22:26:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2024-09-12 22:26:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 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 48 [2024-09-12 22:26:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:37,807 INFO L225 Difference]: With dead ends: 10204 [2024-09-12 22:26:37,807 INFO L226 Difference]: Without dead ends: 9013 [2024-09-12 22:26:37,813 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37459 ImplicationChecksByTransitivity, 109.8s TimeCoverageRelationStatistics Valid=24930, Invalid=65972, Unknown=0, NotChecked=0, Total=90902 [2024-09-12 22:26:37,814 INFO L434 NwaCegarLoop]: 141 mSDtfsCounter, 6071 mSDsluCounter, 4186 mSDsCounter, 0 mSdLazyCounter, 6147 mSolverCounterSat, 4127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6071 SdHoareTripleChecker+Valid, 4327 SdHoareTripleChecker+Invalid, 10274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4127 IncrementalHoareTripleChecker+Valid, 6147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:37,814 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6071 Valid, 4327 Invalid, 10274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4127 Valid, 6147 Invalid, 0 Unknown, 0 Unchecked, 30.7s Time] [2024-09-12 22:26:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9013 states. [2024-09-12 22:26:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9013 to 3578. [2024-09-12 22:26:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3573 states have (on average 1.6022949902043102) internal successors, (5725), 3573 states have internal predecessors, (5725), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 5729 transitions. [2024-09-12 22:26:47,288 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 5729 transitions. Word has length 48 [2024-09-12 22:26:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:47,289 INFO L474 AbstractCegarLoop]: Abstraction has 3578 states and 5729 transitions. [2024-09-12 22:26:47,289 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 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 22:26:47,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 5729 transitions. [2024-09-12 22:26:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 22:26:47,291 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:47,291 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:47,304 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 22:26:47,495 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-12 22:26:47,496 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:47,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash -367454977, now seen corresponding path program 17 times [2024-09-12 22:26:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:47,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262649856] [2024-09-12 22:26:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:47,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:47,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 22:26:47,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:47,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262649856] [2024-09-12 22:26:47,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262649856] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:47,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734797545] [2024-09-12 22:26:47,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:26:47,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:47,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:47,651 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 22:26:47,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process Killed by 15