./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.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/nla-digbench/egcd2-ll.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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --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 23:06:25,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 23:06:25,047 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 23:06:25,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 23:06:25,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 23:06:25,064 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 23:06:25,066 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 23:06:25,067 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 23:06:25,067 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 23:06:25,070 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 23:06:25,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 23:06:25,070 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 23:06:25,071 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 23:06:25,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 23:06:25,071 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 23:06:25,071 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 23:06:25,072 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 23:06:25,072 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 23:06:25,072 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 23:06:25,072 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 23:06:25,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 23:06:25,073 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 23:06:25,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 23:06:25,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 23:06:25,074 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 23:06:25,074 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 23:06:25,074 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 23:06:25,075 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 23:06:25,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 23:06:25,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 23:06:25,075 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 23:06:25,075 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 23:06:25,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:06:25,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 23:06:25,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 23:06:25,076 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 23:06:25,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 23:06:25,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 23:06:25,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 23:06:25,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 23:06:25,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 23:06:25,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 23:06:25,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 23:06:25,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 23:06:25,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 23:06:25,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 23:06:25,299 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 23:06:25,299 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 23:06:25,300 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-12 23:06:26,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 23:06:26,655 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 23:06:26,655 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-12 23:06:26,661 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/dd7b69f00/7c4d26f247534ba18f7c9a2885c27a9c/FLAG009c49720 [2024-09-12 23:06:27,058 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/dd7b69f00/7c4d26f247534ba18f7c9a2885c27a9c [2024-09-12 23:06:27,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 23:06:27,060 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 23:06:27,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 23:06:27,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 23:06:27,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 23:06:27,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@357a2c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27, skipping insertion in model container [2024-09-12 23:06:27,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,084 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 23:06:27,219 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/nla-digbench/egcd2-ll.c[490,503] [2024-09-12 23:06:27,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:06:27,260 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 23:06:27,268 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/nla-digbench/egcd2-ll.c[490,503] [2024-09-12 23:06:27,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:06:27,285 INFO L204 MainTranslator]: Completed translation [2024-09-12 23:06:27,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27 WrapperNode [2024-09-12 23:06:27,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 23:06:27,287 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 23:06:27,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 23:06:27,287 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 23:06:27,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,297 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,301 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 23:06:27,302 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 23:06:27,302 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 23:06:27,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 23:06:27,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 23:06:27,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,311 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,320 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 23:06:27,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,320 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,323 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,329 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,332 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 23:06:27,333 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 23:06:27,333 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 23:06:27,333 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 23:06:27,334 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (1/1) ... [2024-09-12 23:06:27,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:06:27,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:27,360 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 23:06:27,363 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 23:06:27,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 23:06:27,397 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 23:06:27,398 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 23:06:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 23:06:27,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 23:06:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 23:06:27,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 23:06:27,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 23:06:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 23:06:27,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 23:06:27,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 23:06:27,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 23:06:27,453 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 23:06:27,454 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 23:06:27,569 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-12 23:06:27,569 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 23:06:27,590 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 23:06:27,591 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 23:06:27,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:06:27 BoogieIcfgContainer [2024-09-12 23:06:27,591 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 23:06:27,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 23:06:27,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 23:06:27,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 23:06:27,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 11:06:27" (1/3) ... [2024-09-12 23:06:27,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561ee46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:06:27, skipping insertion in model container [2024-09-12 23:06:27,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:06:27" (2/3) ... [2024-09-12 23:06:27,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561ee46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:06:27, skipping insertion in model container [2024-09-12 23:06:27,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:06:27" (3/3) ... [2024-09-12 23:06:27,597 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2024-09-12 23:06:27,610 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 23:06:27,611 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 23:06:27,651 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 23:06:27,657 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;@7d0945d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 23:06:27,658 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 23:06:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 23:06:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 23:06:27,671 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:27,672 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:06:27,673 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:27,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1130788706, now seen corresponding path program 1 times [2024-09-12 23:06:27,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:27,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610288044] [2024-09-12 23:06:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:27,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:27,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:06:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:27,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:06:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:27,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 23:06:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:27,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:06:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:27,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 23:06:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 23:06:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610288044] [2024-09-12 23:06:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610288044] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:06:27,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:06:27,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 23:06:27,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772671319] [2024-09-12 23:06:27,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:06:27,863 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 23:06:27,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:27,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 23:06:27,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 23:06:27,891 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 23:06:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:27,924 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2024-09-12 23:06:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 23:06:27,927 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-12 23:06:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:27,933 INFO L225 Difference]: With dead ends: 64 [2024-09-12 23:06:27,933 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 23:06:27,936 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 23:06:27,941 INFO L434 NwaCegarLoop]: 42 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, 42 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 23:06:27,942 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:06:27,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 23:06:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 23:06:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 23:06:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-09-12 23:06:27,973 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 31 [2024-09-12 23:06:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:27,974 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-09-12 23:06:27,974 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 23:06:27,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-09-12 23:06:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 23:06:27,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:27,977 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:06:27,977 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 23:06:27,977 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:27,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:27,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1704590499, now seen corresponding path program 1 times [2024-09-12 23:06:27,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:27,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095924676] [2024-09-12 23:06:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:27,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:28,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:06:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:28,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:06:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:28,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 23:06:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:28,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:06:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:28,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 23:06:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 23:06:28,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:28,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095924676] [2024-09-12 23:06:28,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095924676] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:06:28,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629907537] [2024-09-12 23:06:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:28,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:28,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:28,231 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 23:06:28,233 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 23:06:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:28,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 23:06:28,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 23:06:28,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:06:28,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629907537] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:06:28,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:06:28,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-09-12 23:06:28,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010517832] [2024-09-12 23:06:28,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:06:28,432 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 23:06:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 23:06:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-12 23:06:28,433 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 23:06:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:28,529 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2024-09-12 23:06:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 23:06:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-12 23:06:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:28,533 INFO L225 Difference]: With dead ends: 48 [2024-09-12 23:06:28,533 INFO L226 Difference]: Without dead ends: 46 [2024-09-12 23:06:28,533 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-12 23:06:28,534 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:28,534 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:06:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-12 23:06:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-09-12 23:06:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 23:06:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2024-09-12 23:06:28,551 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 32 [2024-09-12 23:06:28,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:28,553 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2024-09-12 23:06:28,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 23:06:28,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:28,553 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2024-09-12 23:06:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 23:06:28,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:28,554 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:06:28,569 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 23:06:28,755 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:28,756 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:28,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1312615442, now seen corresponding path program 1 times [2024-09-12 23:06:28,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:28,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767609164] [2024-09-12 23:06:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:28,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:06:28,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667576061] [2024-09-12 23:06:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:28,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:28,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:28,783 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 23:06:28,785 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 23:06:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:28,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:06:28,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 23:06:28,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:06:28,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:28,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767609164] [2024-09-12 23:06:28,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:06:28,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667576061] [2024-09-12 23:06:28,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667576061] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:06:28,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:06:28,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:06:28,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923860142] [2024-09-12 23:06:28,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:06:28,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:06:28,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:06:28,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:06:28,872 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-12 23:06:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:28,926 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-09-12 23:06:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:06:28,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-12 23:06:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:28,928 INFO L225 Difference]: With dead ends: 63 [2024-09-12 23:06:28,928 INFO L226 Difference]: Without dead ends: 61 [2024-09-12 23:06:28,929 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:06:28,930 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:28,930 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:06:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-12 23:06:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2024-09-12 23:06:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 23:06:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2024-09-12 23:06:28,947 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 33 [2024-09-12 23:06:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:28,947 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2024-09-12 23:06:28,947 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-12 23:06:28,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2024-09-12 23:06:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 23:06:28,948 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:28,948 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 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 23:06:28,960 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 23:06:29,152 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:29,153 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:29,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1674155548, now seen corresponding path program 1 times [2024-09-12 23:06:29,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:29,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564324696] [2024-09-12 23:06:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:29,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:29,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:06:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:29,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:06:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:29,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 23:06:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:29,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:06:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:29,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 23:06:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:29,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 23:06:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 23:06:29,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:29,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564324696] [2024-09-12 23:06:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564324696] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:06:29,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015583465] [2024-09-12 23:06:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:29,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:29,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:29,282 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 23:06:29,286 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 23:06:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:29,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 23:06:29,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 23:06:29,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:06:29,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015583465] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:06:29,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:06:29,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-12 23:06:29,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011504031] [2024-09-12 23:06:29,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:06:29,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:06:29,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:29,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:06:29,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-12 23:06:29,397 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-12 23:06:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:29,465 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-09-12 23:06:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:06:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-12 23:06:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:29,468 INFO L225 Difference]: With dead ends: 60 [2024-09-12 23:06:29,468 INFO L226 Difference]: Without dead ends: 56 [2024-09-12 23:06:29,468 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-12 23:06:29,469 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:29,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:06:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-12 23:06:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-09-12 23:06:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 23:06:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-09-12 23:06:29,491 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2024-09-12 23:06:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:29,491 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-09-12 23:06:29,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-12 23:06:29,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-09-12 23:06:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 23:06:29,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:29,493 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 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 23:06:29,506 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 23:06:29,693 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:29,694 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:29,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1754125331, now seen corresponding path program 1 times [2024-09-12 23:06:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:29,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615620827] [2024-09-12 23:06:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:29,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:06:29,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696297545] [2024-09-12 23:06:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:29,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:29,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:29,726 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 23:06:29,728 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 23:06:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:29,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 23:06:29,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 23:06:29,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:06:29,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:29,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615620827] [2024-09-12 23:06:29,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:06:29,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696297545] [2024-09-12 23:06:29,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696297545] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:06:29,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:06:29,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:06:29,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144731259] [2024-09-12 23:06:29,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:06:29,947 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:06:29,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:29,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:06:29,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:06:29,948 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-12 23:06:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:30,032 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-09-12 23:06:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:06:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-09-12 23:06:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:30,033 INFO L225 Difference]: With dead ends: 62 [2024-09-12 23:06:30,033 INFO L226 Difference]: Without dead ends: 60 [2024-09-12 23:06:30,034 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:06:30,034 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:30,034 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:06:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-12 23:06:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-12 23:06:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 23:06:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-09-12 23:06:30,050 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 48 [2024-09-12 23:06:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:30,051 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-09-12 23:06:30,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-12 23:06:30,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-09-12 23:06:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 23:06:30,056 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:30,056 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 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 23:06:30,073 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 23:06:30,256 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:30,257 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:30,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:30,257 INFO L85 PathProgramCache]: Analyzing trace with hash -914162351, now seen corresponding path program 1 times [2024-09-12 23:06:30,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:30,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882174857] [2024-09-12 23:06:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:06:30,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962852599] [2024-09-12 23:06:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:30,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:30,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:30,273 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 23:06:30,275 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 23:06:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:30,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 23:06:30,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-12 23:06:30,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:06:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-12 23:06:30,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:30,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882174857] [2024-09-12 23:06:30,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:06:30,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962852599] [2024-09-12 23:06:30,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962852599] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:06:30,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:06:30,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-12 23:06:30,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832209012] [2024-09-12 23:06:30,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:06:30,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 23:06:30,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:30,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 23:06:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 23:06:30,519 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-12 23:06:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:30,656 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2024-09-12 23:06:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 23:06:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-09-12 23:06:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:30,660 INFO L225 Difference]: With dead ends: 87 [2024-09-12 23:06:30,660 INFO L226 Difference]: Without dead ends: 85 [2024-09-12 23:06:30,660 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-12 23:06:30,661 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:30,661 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 203 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:06:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-12 23:06:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2024-09-12 23:06:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 23:06:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-09-12 23:06:30,681 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 55 [2024-09-12 23:06:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:30,682 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-09-12 23:06:30,682 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-12 23:06:30,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-09-12 23:06:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 23:06:30,683 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:30,683 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:30,698 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 23:06:30,884 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 23:06:30,884 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:30,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:30,884 INFO L85 PathProgramCache]: Analyzing trace with hash -268943045, now seen corresponding path program 1 times [2024-09-12 23:06:30,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:30,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111020341] [2024-09-12 23:06:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:30,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:30,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:06:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:30,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:06:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 23:06:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:06:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 23:06:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 23:06:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 23:06:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 23:06:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 23:06:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-12 23:06:31,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:31,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111020341] [2024-09-12 23:06:31,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111020341] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:06:31,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758315282] [2024-09-12 23:06:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:31,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:31,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:31,059 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 23:06:31,061 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 23:06:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 23:06:31,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-12 23:06:31,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:06:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-12 23:06:31,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758315282] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:06:31,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 23:06:31,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-12 23:06:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678151639] [2024-09-12 23:06:31,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 23:06:31,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 23:06:31,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 23:06:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-12 23:06:31,252 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-12 23:06:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:31,415 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2024-09-12 23:06:31,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 23:06:31,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 57 [2024-09-12 23:06:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:31,417 INFO L225 Difference]: With dead ends: 102 [2024-09-12 23:06:31,417 INFO L226 Difference]: Without dead ends: 94 [2024-09-12 23:06:31,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-12 23:06:31,418 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:31,418 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 293 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:06:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-12 23:06:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-09-12 23:06:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 23:06:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-09-12 23:06:31,438 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 57 [2024-09-12 23:06:31,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:31,439 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-09-12 23:06:31,439 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-12 23:06:31,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-09-12 23:06:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-12 23:06:31,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:31,442 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 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 23:06:31,456 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 23:06:31,642 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:31,642 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:31,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:31,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2145912741, now seen corresponding path program 1 times [2024-09-12 23:06:31,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:31,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333742184] [2024-09-12 23:06:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:31,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:06:31,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799295414] [2024-09-12 23:06:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:31,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:31,655 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 23:06:31,657 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 23:06:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:31,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 23:06:31,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 23:06:31,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:06:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 23:06:32,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:32,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333742184] [2024-09-12 23:06:32,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:06:32,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799295414] [2024-09-12 23:06:32,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799295414] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:06:32,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:06:32,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-12 23:06:32,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496940368] [2024-09-12 23:06:32,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:06:32,141 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 23:06:32,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 23:06:32,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-12 23:06:32,142 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-12 23:06:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:32,985 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2024-09-12 23:06:32,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 23:06:32,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 63 [2024-09-12 23:06:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:32,987 INFO L225 Difference]: With dead ends: 136 [2024-09-12 23:06:32,987 INFO L226 Difference]: Without dead ends: 133 [2024-09-12 23:06:32,988 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2024-09-12 23:06:32,988 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:32,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 277 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 23:06:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-12 23:06:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2024-09-12 23:06:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 49 states have call successors, (49), 9 states have call predecessors, (49), 8 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-12 23:06:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 174 transitions. [2024-09-12 23:06:33,021 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 174 transitions. Word has length 63 [2024-09-12 23:06:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:33,025 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 174 transitions. [2024-09-12 23:06:33,025 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-12 23:06:33,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 174 transitions. [2024-09-12 23:06:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-12 23:06:33,026 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:33,026 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:06:33,041 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 23:06:33,226 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:33,227 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:33,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1386009882, now seen corresponding path program 2 times [2024-09-12 23:06:33,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:33,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784117770] [2024-09-12 23:06:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:33,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:06:33,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417174868] [2024-09-12 23:06:33,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:06:33,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:33,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:33,252 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 23:06:33,253 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 23:06:33,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:06:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:06:33,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 23:06:33,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-12 23:06:33,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:06:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 23:06:33,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:33,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784117770] [2024-09-12 23:06:33,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:06:33,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417174868] [2024-09-12 23:06:33,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417174868] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:06:33,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:06:33,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-12 23:06:33,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915192596] [2024-09-12 23:06:33,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:06:33,812 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 23:06:33,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 23:06:33,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-09-12 23:06:33,813 INFO L87 Difference]: Start difference. First operand 123 states and 174 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-12 23:06:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:34,828 INFO L93 Difference]: Finished difference Result 243 states and 366 transitions. [2024-09-12 23:06:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 23:06:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 68 [2024-09-12 23:06:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:34,831 INFO L225 Difference]: With dead ends: 243 [2024-09-12 23:06:34,831 INFO L226 Difference]: Without dead ends: 241 [2024-09-12 23:06:34,832 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-09-12 23:06:34,833 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:34,833 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 287 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 23:06:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-12 23:06:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2024-09-12 23:06:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 112 states have internal predecessors, (137), 85 states have call successors, (85), 11 states have call predecessors, (85), 10 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2024-09-12 23:06:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 304 transitions. [2024-09-12 23:06:34,897 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 304 transitions. Word has length 68 [2024-09-12 23:06:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:34,897 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 304 transitions. [2024-09-12 23:06:34,898 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-12 23:06:34,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 304 transitions. [2024-09-12 23:06:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-12 23:06:34,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:34,900 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:06:34,914 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 23:06:35,106 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:35,107 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:35,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:35,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1448853371, now seen corresponding path program 3 times [2024-09-12 23:06:35,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:35,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5372032] [2024-09-12 23:06:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:35,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:06:35,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354848553] [2024-09-12 23:06:35,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:06:35,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:35,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:35,130 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 23:06:35,131 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 23:06:35,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 23:06:35,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:06:35,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-12 23:06:35,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 23:06:36,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:06:50,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:50,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5372032] [2024-09-12 23:06:50,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:06:50,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354848553] [2024-09-12 23:06:50,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354848553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:06:50,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:06:50,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-12 23:06:50,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901487453] [2024-09-12 23:06:50,655 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:06:50,655 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 23:06:50,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 23:06:50,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-09-12 23:06:50,656 INFO L87 Difference]: Start difference. First operand 206 states and 304 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-12 23:06:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:52,430 INFO L93 Difference]: Finished difference Result 227 states and 327 transitions. [2024-09-12 23:06:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 23:06:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2024-09-12 23:06:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:52,432 INFO L225 Difference]: With dead ends: 227 [2024-09-12 23:06:52,432 INFO L226 Difference]: Without dead ends: 225 [2024-09-12 23:06:52,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-12 23:06:52,433 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:52,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 23:06:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-12 23:06:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2024-09-12 23:06:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 123 states have internal predecessors, (149), 89 states have call successors, (89), 14 states have call predecessors, (89), 13 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-12 23:06:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 324 transitions. [2024-09-12 23:06:52,508 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 324 transitions. Word has length 73 [2024-09-12 23:06:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:52,509 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 324 transitions. [2024-09-12 23:06:52,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-12 23:06:52,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 324 transitions. [2024-09-12 23:06:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-12 23:06:52,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:52,510 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:06:52,529 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 23:06:52,715 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 23:06:52,716 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:52,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash 910050682, now seen corresponding path program 1 times [2024-09-12 23:06:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:52,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758856225] [2024-09-12 23:06:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:52,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:06:52,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284123088] [2024-09-12 23:06:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:52,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:52,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:52,741 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 23:06:52,742 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 23:06:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:52,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-12 23:06:52,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-12 23:06:53,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:06:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-12 23:06:53,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:53,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758856225] [2024-09-12 23:06:53,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:06:53,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284123088] [2024-09-12 23:06:53,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284123088] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:06:53,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:06:53,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-12 23:06:53,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280242873] [2024-09-12 23:06:53,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:06:53,933 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 23:06:53,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 23:06:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-12 23:06:53,934 INFO L87 Difference]: Start difference. First operand 224 states and 324 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-12 23:06:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:06:56,568 INFO L93 Difference]: Finished difference Result 353 states and 532 transitions. [2024-09-12 23:06:56,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 23:06:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 79 [2024-09-12 23:06:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:06:56,571 INFO L225 Difference]: With dead ends: 353 [2024-09-12 23:06:56,571 INFO L226 Difference]: Without dead ends: 349 [2024-09-12 23:06:56,571 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 23:06:56,572 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 71 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-12 23:06:56,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 609 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-12 23:06:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-12 23:06:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2024-09-12 23:06:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 178 states have (on average 1.2640449438202248) internal successors, (225), 181 states have internal predecessors, (225), 150 states have call successors, (150), 17 states have call predecessors, (150), 16 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-12 23:06:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 522 transitions. [2024-09-12 23:06:56,700 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 522 transitions. Word has length 79 [2024-09-12 23:06:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:06:56,701 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 522 transitions. [2024-09-12 23:06:56,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-12 23:06:56,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 522 transitions. [2024-09-12 23:06:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-12 23:06:56,706 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:06:56,706 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:06:56,718 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 23:06:56,906 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 23:06:56,906 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:06:56,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:06:56,907 INFO L85 PathProgramCache]: Analyzing trace with hash 623896260, now seen corresponding path program 1 times [2024-09-12 23:06:56,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:06:56,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887094241] [2024-09-12 23:06:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:56,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:06:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:06:56,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672603566] [2024-09-12 23:06:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:06:56,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:06:56,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:06:56,933 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 23:06:56,934 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 23:06:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:06:56,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-12 23:06:56,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:06:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-12 23:06:57,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:06:59,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:06:59,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887094241] [2024-09-12 23:06:59,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:06:59,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672603566] [2024-09-12 23:06:59,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672603566] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:06:59,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:06:59,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-12 23:06:59,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227783910] [2024-09-12 23:06:59,444 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:06:59,445 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 23:06:59,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:06:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 23:06:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-09-12 23:06:59,445 INFO L87 Difference]: Start difference. First operand 345 states and 522 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-12 23:07:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:07:00,507 INFO L93 Difference]: Finished difference Result 358 states and 533 transitions. [2024-09-12 23:07:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 23:07:00,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 95 [2024-09-12 23:07:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:07:00,510 INFO L225 Difference]: With dead ends: 358 [2024-09-12 23:07:00,510 INFO L226 Difference]: Without dead ends: 356 [2024-09-12 23:07:00,511 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-09-12 23:07:00,511 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 23:07:00,512 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 369 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 23:07:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-09-12 23:07:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 353. [2024-09-12 23:07:00,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 184 states have (on average 1.2554347826086956) internal successors, (231), 187 states have internal predecessors, (231), 150 states have call successors, (150), 19 states have call predecessors, (150), 18 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-12 23:07:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 528 transitions. [2024-09-12 23:07:00,662 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 528 transitions. Word has length 95 [2024-09-12 23:07:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:07:00,663 INFO L474 AbstractCegarLoop]: Abstraction has 353 states and 528 transitions. [2024-09-12 23:07:00,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-12 23:07:00,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 528 transitions. [2024-09-12 23:07:00,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-12 23:07:00,664 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:07:00,665 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:07:00,678 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 23:07:00,865 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:07:00,866 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:07:00,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash 658114285, now seen corresponding path program 4 times [2024-09-12 23:07:00,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:07:00,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175798268] [2024-09-12 23:07:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:00,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:07:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:07:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:07:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 23:07:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:07:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 23:07:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 23:07:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 23:07:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 23:07:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 23:07:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 23:07:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 23:07:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 23:07:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 23:07:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 23:07:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-12 23:07:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 23:07:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-09-12 23:07:00,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:07:00,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175798268] [2024-09-12 23:07:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175798268] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:07:00,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:07:00,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:07:00,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852565618] [2024-09-12 23:07:00,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:07:00,976 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:07:00,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:07:00,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:07:00,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:07:00,977 INFO L87 Difference]: Start difference. First operand 353 states and 528 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-12 23:07:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:07:01,121 INFO L93 Difference]: Finished difference Result 426 states and 629 transitions. [2024-09-12 23:07:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 23:07:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2024-09-12 23:07:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:07:01,123 INFO L225 Difference]: With dead ends: 426 [2024-09-12 23:07:01,123 INFO L226 Difference]: Without dead ends: 230 [2024-09-12 23:07:01,125 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 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 23:07:01,125 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:07:01,125 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 159 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:07:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-09-12 23:07:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 206. [2024-09-12 23:07:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 112 states have internal predecessors, (126), 78 states have call successors, (78), 19 states have call predecessors, (78), 18 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2024-09-12 23:07:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 279 transitions. [2024-09-12 23:07:01,196 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 279 transitions. Word has length 98 [2024-09-12 23:07:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:07:01,196 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 279 transitions. [2024-09-12 23:07:01,196 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-12 23:07:01,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 279 transitions. [2024-09-12 23:07:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-12 23:07:01,197 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:07:01,197 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:07:01,197 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-12 23:07:01,198 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:07:01,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:01,198 INFO L85 PathProgramCache]: Analyzing trace with hash -825105347, now seen corresponding path program 1 times [2024-09-12 23:07:01,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:07:01,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195880949] [2024-09-12 23:07:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:01,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:07:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:07:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:07:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 23:07:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:07:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 23:07:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 23:07:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 23:07:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 23:07:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 23:07:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 23:07:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 23:07:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 23:07:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 23:07:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 23:07:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 23:07:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 23:07:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-12 23:07:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-12 23:07:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-12 23:07:01,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:07:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195880949] [2024-09-12 23:07:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195880949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:07:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708416358] [2024-09-12 23:07:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:01,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:07:01,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:07:01,334 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 23:07:01,335 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 23:07:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:07:01,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:07:01,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:07:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-09-12 23:07:01,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:07:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-12 23:07:01,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708416358] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:07:01,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 23:07:01,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-12 23:07:01,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426272366] [2024-09-12 23:07:01,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 23:07:01,489 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 23:07:01,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:07:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 23:07:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-12 23:07:01,489 INFO L87 Difference]: Start difference. First operand 206 states and 279 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-12 23:07:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:07:01,736 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2024-09-12 23:07:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 23:07:01,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 109 [2024-09-12 23:07:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:07:01,738 INFO L225 Difference]: With dead ends: 232 [2024-09-12 23:07:01,738 INFO L226 Difference]: Without dead ends: 220 [2024-09-12 23:07:01,738 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-12 23:07:01,738 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 17 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:07:01,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 307 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:07:01,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-09-12 23:07:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 201. [2024-09-12 23:07:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 106 states have (on average 1.150943396226415) internal successors, (122), 108 states have internal predecessors, (122), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-09-12 23:07:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2024-09-12 23:07:01,800 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 109 [2024-09-12 23:07:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:07:01,800 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2024-09-12 23:07:01,800 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-12 23:07:01,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2024-09-12 23:07:01,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-12 23:07:01,801 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:07:01,801 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:07:01,813 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 23:07:02,001 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 23:07:02,002 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:07:02,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:02,002 INFO L85 PathProgramCache]: Analyzing trace with hash 429591308, now seen corresponding path program 2 times [2024-09-12 23:07:02,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:07:02,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463213862] [2024-09-12 23:07:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:02,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:07:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:07:02,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767287794] [2024-09-12 23:07:02,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:07:02,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:07:02,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:07:02,034 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 23:07:02,035 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 23:07:02,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:07:02,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:07:02,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-12 23:07:02,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:07:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2024-09-12 23:07:02,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:07:02,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:07:02,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463213862] [2024-09-12 23:07:02,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:07:02,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767287794] [2024-09-12 23:07:02,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767287794] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:07:02,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:07:02,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-12 23:07:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435109419] [2024-09-12 23:07:02,749 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:07:02,749 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 23:07:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:07:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 23:07:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-12 23:07:02,750 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-12 23:07:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:07:03,441 INFO L93 Difference]: Finished difference Result 231 states and 316 transitions. [2024-09-12 23:07:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 23:07:03,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2024-09-12 23:07:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:07:03,443 INFO L225 Difference]: With dead ends: 231 [2024-09-12 23:07:03,443 INFO L226 Difference]: Without dead ends: 229 [2024-09-12 23:07:03,445 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2024-09-12 23:07:03,445 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 23:07:03,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 428 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 23:07:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-09-12 23:07:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2024-09-12 23:07:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 118 states have (on average 1.152542372881356) internal successors, (136), 120 states have internal predecessors, (136), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-12 23:07:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 311 transitions. [2024-09-12 23:07:03,529 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 311 transitions. Word has length 110 [2024-09-12 23:07:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:07:03,531 INFO L474 AbstractCegarLoop]: Abstraction has 226 states and 311 transitions. [2024-09-12 23:07:03,531 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-12 23:07:03,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 311 transitions. [2024-09-12 23:07:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-12 23:07:03,532 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:07:03,532 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:07:03,547 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 23:07:03,732 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 23:07:03,733 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:07:03,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:03,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1625892333, now seen corresponding path program 3 times [2024-09-12 23:07:03,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:07:03,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314821000] [2024-09-12 23:07:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:03,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:07:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:07:03,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359911804] [2024-09-12 23:07:03,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:07:03,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:07:03,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:07:03,749 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 23:07:03,750 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 23:07:03,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 23:07:03,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:07:03,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 23:07:03,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:07:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 37 proven. 37 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-09-12 23:07:04,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:07:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-09-12 23:07:05,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:07:05,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314821000] [2024-09-12 23:07:05,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:07:05,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359911804] [2024-09-12 23:07:05,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359911804] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:07:05,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:07:05,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2024-09-12 23:07:05,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710823497] [2024-09-12 23:07:05,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:07:05,366 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 23:07:05,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:07:05,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 23:07:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-12 23:07:05,367 INFO L87 Difference]: Start difference. First operand 226 states and 311 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-12 23:07:07,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:07:07,760 INFO L93 Difference]: Finished difference Result 267 states and 364 transitions. [2024-09-12 23:07:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 23:07:07,761 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2024-09-12 23:07:07,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:07:07,762 INFO L225 Difference]: With dead ends: 267 [2024-09-12 23:07:07,762 INFO L226 Difference]: Without dead ends: 265 [2024-09-12 23:07:07,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 23:07:07,763 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 59 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:07:07,763 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 482 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-12 23:07:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-12 23:07:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2024-09-12 23:07:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 141 states have internal predecessors, (160), 101 states have call successors, (101), 22 states have call predecessors, (101), 21 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-09-12 23:07:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 359 transitions. [2024-09-12 23:07:07,871 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 359 transitions. Word has length 115 [2024-09-12 23:07:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:07:07,871 INFO L474 AbstractCegarLoop]: Abstraction has 262 states and 359 transitions. [2024-09-12 23:07:07,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-12 23:07:07,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 359 transitions. [2024-09-12 23:07:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-12 23:07:07,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:07:07,872 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:07:07,894 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 23:07:08,072 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 23:07:08,073 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:07:08,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash 34587587, now seen corresponding path program 4 times [2024-09-12 23:07:08,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:07:08,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890740805] [2024-09-12 23:07:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:08,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:07:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:07:08,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867530167] [2024-09-12 23:07:08,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 23:07:08,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:07:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:07:08,101 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 23:07:08,103 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 23:07:08,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 23:07:08,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:07:08,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 23:07:08,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:07:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 100 proven. 43 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-12 23:07:09,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:07:09,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:07:09,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890740805] [2024-09-12 23:07:09,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:07:09,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867530167] [2024-09-12 23:07:09,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867530167] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:07:09,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:07:09,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-12 23:07:09,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712194601] [2024-09-12 23:07:09,147 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:07:09,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 23:07:09,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:07:09,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 23:07:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-09-12 23:07:09,148 INFO L87 Difference]: Start difference. First operand 262 states and 359 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-12 23:07:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:07:10,261 INFO L93 Difference]: Finished difference Result 295 states and 404 transitions. [2024-09-12 23:07:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 23:07:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 117 [2024-09-12 23:07:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:07:10,263 INFO L225 Difference]: With dead ends: 295 [2024-09-12 23:07:10,263 INFO L226 Difference]: Without dead ends: 293 [2024-09-12 23:07:10,263 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-09-12 23:07:10,264 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 23:07:10,264 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 452 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 23:07:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-12 23:07:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 269. [2024-09-12 23:07:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 146 states have internal predecessors, (164), 104 states have call successors, (104), 22 states have call predecessors, (104), 21 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-12 23:07:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 369 transitions. [2024-09-12 23:07:10,370 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 369 transitions. Word has length 117 [2024-09-12 23:07:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:07:10,370 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 369 transitions. [2024-09-12 23:07:10,370 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-12 23:07:10,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 369 transitions. [2024-09-12 23:07:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 23:07:10,371 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:07:10,372 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:07:10,385 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 23:07:10,572 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 23:07:10,572 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:07:10,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1783402708, now seen corresponding path program 5 times [2024-09-12 23:07:10,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:07:10,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663200951] [2024-09-12 23:07:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:10,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:07:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:07:10,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245163618] [2024-09-12 23:07:10,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 23:07:10,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:07:10,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:07:10,592 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 23:07:10,593 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 23:07:10,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 23:07:10,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:07:10,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-12 23:07:10,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:07:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-12 23:07:11,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:07:32,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:07:32,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663200951] [2024-09-12 23:07:32,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:07:32,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245163618] [2024-09-12 23:07:32,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245163618] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:07:32,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:07:32,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-12 23:07:32,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695344396] [2024-09-12 23:07:32,616 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:07:32,616 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 23:07:32,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:07:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 23:07:32,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=722, Unknown=2, NotChecked=0, Total=870 [2024-09-12 23:07:32,617 INFO L87 Difference]: Start difference. First operand 269 states and 369 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-12 23:07:33,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:07:33,411 INFO L93 Difference]: Finished difference Result 285 states and 382 transitions. [2024-09-12 23:07:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 23:07:33,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) Word has length 120 [2024-09-12 23:07:33,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:07:33,413 INFO L225 Difference]: With dead ends: 285 [2024-09-12 23:07:33,413 INFO L226 Difference]: Without dead ends: 283 [2024-09-12 23:07:33,414 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=235, Invalid=1095, Unknown=2, NotChecked=0, Total=1332 [2024-09-12 23:07:33,414 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 23:07:33,414 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 23:07:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-12 23:07:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2024-09-12 23:07:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 152 states have (on average 1.138157894736842) internal successors, (173), 155 states have internal predecessors, (173), 104 states have call successors, (104), 25 states have call predecessors, (104), 24 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-12 23:07:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 378 transitions. [2024-09-12 23:07:33,531 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 378 transitions. Word has length 120 [2024-09-12 23:07:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:07:33,532 INFO L474 AbstractCegarLoop]: Abstraction has 281 states and 378 transitions. [2024-09-12 23:07:33,532 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-12 23:07:33,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 378 transitions. [2024-09-12 23:07:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-12 23:07:33,533 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:07:33,533 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 23:07:33,547 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-12 23:07:33,733 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 23:07:33,734 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:07:33,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:33,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2078513889, now seen corresponding path program 2 times [2024-09-12 23:07:33,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:07:33,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29690221] [2024-09-12 23:07:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:33,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:07:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:07:33,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793440419] [2024-09-12 23:07:33,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:07:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:07:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:07:33,758 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 23:07:33,763 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 23:07:33,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:07:33,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:07:33,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-12 23:07:33,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:07:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-12 23:07:34,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:07:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-12 23:07:35,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:07:35,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29690221] [2024-09-12 23:07:35,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:07:35,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793440419] [2024-09-12 23:07:35,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793440419] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:07:35,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:07:35,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-09-12 23:07:35,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107211287] [2024-09-12 23:07:35,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:07:35,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 23:07:35,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:07:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 23:07:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-09-12 23:07:35,714 INFO L87 Difference]: Start difference. First operand 281 states and 378 transitions. Second operand has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-12 23:07:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:07:41,079 INFO L93 Difference]: Finished difference Result 414 states and 593 transitions. [2024-09-12 23:07:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-12 23:07:41,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) Word has length 126 [2024-09-12 23:07:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:07:41,081 INFO L225 Difference]: With dead ends: 414 [2024-09-12 23:07:41,081 INFO L226 Difference]: Without dead ends: 412 [2024-09-12 23:07:41,082 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=569, Invalid=2401, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 23:07:41,082 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 134 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-12 23:07:41,083 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 591 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-12 23:07:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-09-12 23:07:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 392. [2024-09-12 23:07:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 202 states have (on average 1.183168316831683) internal successors, (239), 205 states have internal predecessors, (239), 162 states have call successors, (162), 28 states have call predecessors, (162), 27 states have return successors, (159), 158 states have call predecessors, (159), 159 states have call successors, (159) [2024-09-12 23:07:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 560 transitions. [2024-09-12 23:07:41,318 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 560 transitions. Word has length 126 [2024-09-12 23:07:41,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:07:41,319 INFO L474 AbstractCegarLoop]: Abstraction has 392 states and 560 transitions. [2024-09-12 23:07:41,319 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-12 23:07:41,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 560 transitions. [2024-09-12 23:07:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-12 23:07:41,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:07:41,321 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 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 23:07:41,336 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-12 23:07:41,521 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 23:07:41,522 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:07:41,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:41,522 INFO L85 PathProgramCache]: Analyzing trace with hash -627102050, now seen corresponding path program 2 times [2024-09-12 23:07:41,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:07:41,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806405132] [2024-09-12 23:07:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:07:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:07:41,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209900294] [2024-09-12 23:07:41,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:07:41,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:07:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:07:41,538 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 23:07:41,540 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 23:07:41,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:07:41,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:07:41,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 23:07:41,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:07:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2024-09-12 23:07:42,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:07:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-09-12 23:07:42,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:07:42,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806405132] [2024-09-12 23:07:42,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:07:42,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209900294] [2024-09-12 23:07:42,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209900294] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:07:42,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:07:42,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-12 23:07:42,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156359049] [2024-09-12 23:07:42,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:07:42,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 23:07:42,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:07:42,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 23:07:42,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-09-12 23:07:42,360 INFO L87 Difference]: Start difference. First operand 392 states and 560 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-12 23:07:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:07:45,104 INFO L93 Difference]: Finished difference Result 415 states and 580 transitions. [2024-09-12 23:07:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 23:07:45,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 131 [2024-09-12 23:07:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:07:45,107 INFO L225 Difference]: With dead ends: 415 [2024-09-12 23:07:45,107 INFO L226 Difference]: Without dead ends: 405 [2024-09-12 23:07:45,108 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 23:07:45,108 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 67 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:07:45,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 695 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-12 23:07:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-09-12 23:07:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 395. [2024-09-12 23:07:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 206 states have internal predecessors, (238), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2024-09-12 23:07:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 554 transitions. [2024-09-12 23:07:45,368 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 554 transitions. Word has length 131 [2024-09-12 23:07:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:07:45,369 INFO L474 AbstractCegarLoop]: Abstraction has 395 states and 554 transitions. [2024-09-12 23:07:45,369 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-12 23:07:45,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 554 transitions. [2024-09-12 23:07:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-12 23:07:45,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:07:45,371 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:07:45,387 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 23:07:45,571 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 23:07:45,571 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:07:45,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:07:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash 231977005, now seen corresponding path program 6 times [2024-09-12 23:07:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:07:45,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791010067] [2024-09-12 23:07:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:07:45,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:07:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:07:45,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667632721] [2024-09-12 23:07:45,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 23:07:45,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:07:45,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:07:45,592 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 23:07:45,595 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 23:07:45,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 23:07:45,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:07:45,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-12 23:07:45,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:07:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 77 proven. 108 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2024-09-12 23:07:48,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:07:54,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:07:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791010067] [2024-09-12 23:07:54,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:07:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667632721] [2024-09-12 23:07:54,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667632721] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:07:54,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:07:54,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-12 23:07:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403835572] [2024-09-12 23:07:54,956 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:07:54,956 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 23:07:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:07:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 23:07:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=643, Unknown=1, NotChecked=0, Total=756 [2024-09-12 23:07:54,956 INFO L87 Difference]: Start difference. First operand 395 states and 554 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-12 23:08:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:08:00,017 INFO L93 Difference]: Finished difference Result 440 states and 609 transitions. [2024-09-12 23:08:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 23:08:00,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 132 [2024-09-12 23:08:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:08:00,021 INFO L225 Difference]: With dead ends: 440 [2024-09-12 23:08:00,021 INFO L226 Difference]: Without dead ends: 438 [2024-09-12 23:08:00,021 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=181, Invalid=940, Unknown=1, NotChecked=0, Total=1122 [2024-09-12 23:08:00,022 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:08:00,022 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 476 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-12 23:08:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-09-12 23:08:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2024-09-12 23:08:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 226 states have (on average 1.154867256637168) internal successors, (261), 227 states have internal predecessors, (261), 171 states have call successors, (171), 35 states have call predecessors, (171), 34 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-12 23:08:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 601 transitions. [2024-09-12 23:08:00,303 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 601 transitions. Word has length 132 [2024-09-12 23:08:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:08:00,304 INFO L474 AbstractCegarLoop]: Abstraction has 432 states and 601 transitions. [2024-09-12 23:08:00,304 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-12 23:08:00,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 601 transitions. [2024-09-12 23:08:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-12 23:08:00,305 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:08:00,305 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:08:00,311 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 23:08:00,505 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 23:08:00,506 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:08:00,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:00,506 INFO L85 PathProgramCache]: Analyzing trace with hash -456505470, now seen corresponding path program 7 times [2024-09-12 23:08:00,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:08:00,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592771500] [2024-09-12 23:08:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:08:00,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:08:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:08:00,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961608028] [2024-09-12 23:08:00,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 23:08:00,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:08:00,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:08:00,530 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 23:08:00,531 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 23:08:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:08:00,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-12 23:08:00,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:08:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 132 proven. 75 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2024-09-12 23:08:01,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:08:01,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:08:01,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592771500] [2024-09-12 23:08:01,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:08:01,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961608028] [2024-09-12 23:08:01,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961608028] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:08:01,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:08:01,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-12 23:08:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082735617] [2024-09-12 23:08:01,859 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:08:01,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 23:08:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:08:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 23:08:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-09-12 23:08:01,860 INFO L87 Difference]: Start difference. First operand 432 states and 601 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-12 23:08:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:08:02,950 INFO L93 Difference]: Finished difference Result 466 states and 646 transitions. [2024-09-12 23:08:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 23:08:02,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) Word has length 139 [2024-09-12 23:08:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:08:02,954 INFO L225 Difference]: With dead ends: 466 [2024-09-12 23:08:02,954 INFO L226 Difference]: Without dead ends: 464 [2024-09-12 23:08:02,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2024-09-12 23:08:02,955 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 23:08:02,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 465 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 23:08:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-09-12 23:08:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 462. [2024-09-12 23:08:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 241 states have (on average 1.1535269709543567) internal successors, (278), 242 states have internal predecessors, (278), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-12 23:08:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 642 transitions. [2024-09-12 23:08:03,226 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 642 transitions. Word has length 139 [2024-09-12 23:08:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:08:03,226 INFO L474 AbstractCegarLoop]: Abstraction has 462 states and 642 transitions. [2024-09-12 23:08:03,226 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-12 23:08:03,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 642 transitions. [2024-09-12 23:08:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-12 23:08:03,227 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:08:03,227 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:08:03,239 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-12 23:08:03,427 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 23:08:03,428 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:08:03,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1541639723, now seen corresponding path program 8 times [2024-09-12 23:08:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:08:03,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941725437] [2024-09-12 23:08:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:08:03,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:08:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:08:03,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565955497] [2024-09-12 23:08:03,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:08:03,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:08:03,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:08:03,444 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 23:08:03,445 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 23:08:03,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:08:03,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:08:03,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-12 23:08:03,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:08:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 96 proven. 107 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-09-12 23:08:04,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:08:26,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:08:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941725437] [2024-09-12 23:08:26,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:08:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565955497] [2024-09-12 23:08:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565955497] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:08:26,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:08:26,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-12 23:08:26,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646775959] [2024-09-12 23:08:26,272 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:08:26,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 23:08:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:08:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 23:08:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=559, Unknown=3, NotChecked=0, Total=702 [2024-09-12 23:08:26,273 INFO L87 Difference]: Start difference. First operand 462 states and 642 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-12 23:08:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:08:27,367 INFO L93 Difference]: Finished difference Result 472 states and 651 transitions. [2024-09-12 23:08:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 23:08:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 142 [2024-09-12 23:08:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:08:27,373 INFO L225 Difference]: With dead ends: 472 [2024-09-12 23:08:27,374 INFO L226 Difference]: Without dead ends: 470 [2024-09-12 23:08:27,374 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=243, Invalid=944, Unknown=3, NotChecked=0, Total=1190 [2024-09-12 23:08:27,374 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 23:08:27,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 511 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 23:08:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-09-12 23:08:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 466. [2024-09-12 23:08:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 244 states have (on average 1.151639344262295) internal successors, (281), 245 states have internal predecessors, (281), 183 states have call successors, (183), 39 states have call predecessors, (183), 38 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-12 23:08:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 645 transitions. [2024-09-12 23:08:27,643 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 645 transitions. Word has length 142 [2024-09-12 23:08:27,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:08:27,644 INFO L474 AbstractCegarLoop]: Abstraction has 466 states and 645 transitions. [2024-09-12 23:08:27,644 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-12 23:08:27,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 645 transitions. [2024-09-12 23:08:27,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-12 23:08:27,645 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:08:27,645 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:08:27,657 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 23:08:27,845 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 23:08:27,845 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:08:27,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1016913677, now seen corresponding path program 9 times [2024-09-12 23:08:27,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:08:27,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426800344] [2024-09-12 23:08:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:08:27,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:08:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:08:27,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025650371] [2024-09-12 23:08:27,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:08:27,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:08:27,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:08:27,862 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 23:08:27,863 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 23:08:27,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 23:08:27,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:08:27,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 23:08:27,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:08:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 97 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2024-09-12 23:08:29,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:08:30,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:08:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426800344] [2024-09-12 23:08:30,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:08:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025650371] [2024-09-12 23:08:30,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025650371] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:08:30,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:08:30,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-12 23:08:30,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43977588] [2024-09-12 23:08:30,075 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:08:30,076 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 23:08:30,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:08:30,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 23:08:30,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-12 23:08:30,077 INFO L87 Difference]: Start difference. First operand 466 states and 645 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-12 23:08:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:08:31,470 INFO L93 Difference]: Finished difference Result 486 states and 662 transitions. [2024-09-12 23:08:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 23:08:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 142 [2024-09-12 23:08:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:08:31,473 INFO L225 Difference]: With dead ends: 486 [2024-09-12 23:08:31,473 INFO L226 Difference]: Without dead ends: 484 [2024-09-12 23:08:31,473 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-09-12 23:08:31,474 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 23:08:31,474 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 541 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 23:08:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-09-12 23:08:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 478. [2024-09-12 23:08:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1462450592885376) internal successors, (290), 254 states have internal predecessors, (290), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-12 23:08:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 654 transitions. [2024-09-12 23:08:31,764 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 654 transitions. Word has length 142 [2024-09-12 23:08:31,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:08:31,765 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 654 transitions. [2024-09-12 23:08:31,765 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-12 23:08:31,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:31,765 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 654 transitions. [2024-09-12 23:08:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-12 23:08:31,766 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:08:31,766 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:08:31,779 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-12 23:08:31,966 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 23:08:31,967 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:08:31,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1445963081, now seen corresponding path program 3 times [2024-09-12 23:08:31,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:08:31,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498521570] [2024-09-12 23:08:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:08:31,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:08:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:08:31,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791484932] [2024-09-12 23:08:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:08:31,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:08:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:08:31,980 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 23:08:31,981 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 23:08:32,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 23:08:32,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:08:32,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 23:08:32,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:08:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 95 proven. 37 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-09-12 23:08:32,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:08:37,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:08:37,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498521570] [2024-09-12 23:08:37,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:08:37,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791484932] [2024-09-12 23:08:37,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791484932] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:08:37,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:08:37,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-12 23:08:37,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285853783] [2024-09-12 23:08:37,590 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:08:37,590 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 23:08:37,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:08:37,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 23:08:37,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-12 23:08:37,590 INFO L87 Difference]: Start difference. First operand 478 states and 654 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-12 23:08:38,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:08:38,238 INFO L93 Difference]: Finished difference Result 488 states and 663 transitions. [2024-09-12 23:08:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 23:08:38,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 145 [2024-09-12 23:08:38,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:08:38,241 INFO L225 Difference]: With dead ends: 488 [2024-09-12 23:08:38,241 INFO L226 Difference]: Without dead ends: 481 [2024-09-12 23:08:38,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-12 23:08:38,241 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:08:38,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 233 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 23:08:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-12 23:08:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2024-09-12 23:08:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1422924901185771) internal successors, (289), 254 states have internal predecessors, (289), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-12 23:08:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 653 transitions. [2024-09-12 23:08:38,527 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 653 transitions. Word has length 145 [2024-09-12 23:08:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:08:38,527 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 653 transitions. [2024-09-12 23:08:38,527 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-12 23:08:38,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:38,527 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 653 transitions. [2024-09-12 23:08:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-09-12 23:08:38,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:08:38,528 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:08:38,541 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-12 23:08:38,729 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 23:08:38,729 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:08:38,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1961731402, now seen corresponding path program 10 times [2024-09-12 23:08:38,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:08:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725453148] [2024-09-12 23:08:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:08:38,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:08:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:08:38,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323320172] [2024-09-12 23:08:38,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 23:08:38,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:08:38,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:08:38,745 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 23:08:38,747 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 23:08:38,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 23:08:38,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:08:38,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-12 23:08:38,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:08:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 95 proven. 89 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2024-09-12 23:08:39,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:08:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 123 proven. 7 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2024-09-12 23:08:39,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:08:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725453148] [2024-09-12 23:08:39,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:08:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323320172] [2024-09-12 23:08:39,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323320172] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:08:39,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:08:39,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2024-09-12 23:08:39,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899112594] [2024-09-12 23:08:39,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:08:39,580 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 23:08:39,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:08:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 23:08:39,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-12 23:08:39,581 INFO L87 Difference]: Start difference. First operand 478 states and 653 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-12 23:08:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:08:42,472 INFO L93 Difference]: Finished difference Result 501 states and 679 transitions. [2024-09-12 23:08:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 23:08:42,473 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 154 [2024-09-12 23:08:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:08:42,475 INFO L225 Difference]: With dead ends: 501 [2024-09-12 23:08:42,475 INFO L226 Difference]: Without dead ends: 499 [2024-09-12 23:08:42,476 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 23:08:42,476 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 48 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:08:42,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-12 23:08:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-12 23:08:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 486. [2024-09-12 23:08:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 259 states have (on average 1.138996138996139) internal successors, (295), 260 states have internal predecessors, (295), 183 states have call successors, (183), 44 states have call predecessors, (183), 43 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-12 23:08:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 659 transitions. [2024-09-12 23:08:42,782 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 659 transitions. Word has length 154 [2024-09-12 23:08:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:08:42,782 INFO L474 AbstractCegarLoop]: Abstraction has 486 states and 659 transitions. [2024-09-12 23:08:42,782 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-12 23:08:42,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 659 transitions. [2024-09-12 23:08:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-12 23:08:42,784 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:08:42,784 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:08:42,798 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 23:08:42,987 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 23:08:42,987 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:08:42,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1660634611, now seen corresponding path program 11 times [2024-09-12 23:08:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:08:42,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606248617] [2024-09-12 23:08:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:08:42,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:08:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:08:43,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694335308] [2024-09-12 23:08:43,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 23:08:43,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:08:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:08:43,006 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 23:08:43,007 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 23:08:43,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-12 23:08:43,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:08:43,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-12 23:08:43,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:08:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-12 23:08:43,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:08:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-12 23:08:44,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:08:44,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606248617] [2024-09-12 23:08:44,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:08:44,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694335308] [2024-09-12 23:08:44,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694335308] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:08:44,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:08:44,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2024-09-12 23:08:44,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049766411] [2024-09-12 23:08:44,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:08:44,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 23:08:44,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:08:44,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 23:08:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-09-12 23:08:44,549 INFO L87 Difference]: Start difference. First operand 486 states and 659 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-12 23:08:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:08:46,214 INFO L93 Difference]: Finished difference Result 523 states and 714 transitions. [2024-09-12 23:08:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 23:08:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) Word has length 159 [2024-09-12 23:08:46,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:08:46,216 INFO L225 Difference]: With dead ends: 523 [2024-09-12 23:08:46,216 INFO L226 Difference]: Without dead ends: 521 [2024-09-12 23:08:46,217 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 23:08:46,217 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 23:08:46,217 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 625 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 23:08:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-09-12 23:08:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 490. [2024-09-12 23:08:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 262 states have (on average 1.1374045801526718) internal successors, (298), 263 states have internal predecessors, (298), 183 states have call successors, (183), 45 states have call predecessors, (183), 44 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-12 23:08:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 662 transitions. [2024-09-12 23:08:46,578 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 662 transitions. Word has length 159 [2024-09-12 23:08:46,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:08:46,578 INFO L474 AbstractCegarLoop]: Abstraction has 490 states and 662 transitions. [2024-09-12 23:08:46,578 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-12 23:08:46,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 662 transitions. [2024-09-12 23:08:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-09-12 23:08:46,580 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:08:46,580 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:08:46,587 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 23:08:46,780 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 23:08:46,780 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:08:46,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:46,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1550967297, now seen corresponding path program 12 times [2024-09-12 23:08:46,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:08:46,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440202009] [2024-09-12 23:08:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:08:46,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:08:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:08:46,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777956635] [2024-09-12 23:08:46,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 23:08:46,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:08:46,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:08:46,799 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 23:08:46,801 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 23:08:46,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 23:08:46,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:08:46,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-12 23:08:46,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:08:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 183 proven. 103 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2024-09-12 23:08:47,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:08:48,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:08:48,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440202009] [2024-09-12 23:08:48,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:08:48,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777956635] [2024-09-12 23:08:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777956635] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:08:48,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:08:48,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-12 23:08:48,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570312080] [2024-09-12 23:08:48,049 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:08:48,049 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 23:08:48,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:08:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 23:08:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-09-12 23:08:48,050 INFO L87 Difference]: Start difference. First operand 490 states and 662 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-12 23:08:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:08:48,877 INFO L93 Difference]: Finished difference Result 502 states and 672 transitions. [2024-09-12 23:08:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 23:08:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 161 [2024-09-12 23:08:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:08:48,880 INFO L225 Difference]: With dead ends: 502 [2024-09-12 23:08:48,880 INFO L226 Difference]: Without dead ends: 500 [2024-09-12 23:08:48,880 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-09-12 23:08:48,881 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 23:08:48,881 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 287 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 23:08:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-09-12 23:08:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 459. [2024-09-12 23:08:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 249 states have internal predecessors, (281), 167 states have call successors, (167), 44 states have call predecessors, (167), 43 states have return successors, (165), 165 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-12 23:08:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 613 transitions. [2024-09-12 23:08:49,211 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 613 transitions. Word has length 161 [2024-09-12 23:08:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:08:49,211 INFO L474 AbstractCegarLoop]: Abstraction has 459 states and 613 transitions. [2024-09-12 23:08:49,211 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-12 23:08:49,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 613 transitions. [2024-09-12 23:08:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-12 23:08:49,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:08:49,213 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:08:49,219 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 23:08:49,413 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 23:08:49,413 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:08:49,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:08:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash 359715818, now seen corresponding path program 13 times [2024-09-12 23:08:49,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:08:49,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308200623] [2024-09-12 23:08:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:08:49,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:08:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:08:49,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193986124] [2024-09-12 23:08:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 23:08:49,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:08:49,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:08:49,444 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 23:08:49,445 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 23:08:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:08:49,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-12 23:08:49,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:08:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 116 proven. 157 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2024-09-12 23:08:50,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:09:19,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:09:19,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308200623] [2024-09-12 23:09:19,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:09:19,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193986124] [2024-09-12 23:09:19,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193986124] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:09:19,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:09:19,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-12 23:09:19,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45274743] [2024-09-12 23:09:19,478 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:09:19,478 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 23:09:19,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:09:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 23:09:19,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 23:09:19,479 INFO L87 Difference]: Start difference. First operand 459 states and 613 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-12 23:09:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:09:20,712 INFO L93 Difference]: Finished difference Result 483 states and 639 transitions. [2024-09-12 23:09:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 23:09:20,712 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-12 23:09:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:09:20,714 INFO L225 Difference]: With dead ends: 483 [2024-09-12 23:09:20,714 INFO L226 Difference]: Without dead ends: 481 [2024-09-12 23:09:20,715 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 23:09:20,715 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 23:09:20,715 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 409 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 23:09:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-12 23:09:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 477. [2024-09-12 23:09:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 259 states have (on average 1.1312741312741312) internal successors, (293), 260 states have internal predecessors, (293), 171 states have call successors, (171), 47 states have call predecessors, (171), 46 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-12 23:09:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 633 transitions. [2024-09-12 23:09:21,048 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 633 transitions. Word has length 164 [2024-09-12 23:09:21,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:09:21,048 INFO L474 AbstractCegarLoop]: Abstraction has 477 states and 633 transitions. [2024-09-12 23:09:21,048 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-12 23:09:21,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:09:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 633 transitions. [2024-09-12 23:09:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-12 23:09:21,049 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:09:21,050 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:09:21,062 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-12 23:09:21,250 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 23:09:21,250 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:09:21,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:09:21,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1256755380, now seen corresponding path program 14 times [2024-09-12 23:09:21,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:09:21,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284085525] [2024-09-12 23:09:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:09:21,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:09:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:09:21,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756738822] [2024-09-12 23:09:21,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:09:21,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:09:21,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:09:21,274 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 23:09:21,275 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 23:09:21,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:09:21,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:09:21,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-12 23:09:21,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:09:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 210 proven. 156 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2024-09-12 23:09:29,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:09:30,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:09:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284085525] [2024-09-12 23:09:30,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:09:30,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756738822] [2024-09-12 23:09:30,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756738822] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:09:30,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:09:30,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-12 23:09:30,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924795363] [2024-09-12 23:09:30,326 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:09:30,326 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 23:09:30,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:09:30,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 23:09:30,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-12 23:09:30,327 INFO L87 Difference]: Start difference. First operand 477 states and 633 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-12 23:09:36,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:09:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:09:39,146 INFO L93 Difference]: Finished difference Result 526 states and 697 transitions. [2024-09-12 23:09:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 23:09:39,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-12 23:09:39,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:09:39,150 INFO L225 Difference]: With dead ends: 526 [2024-09-12 23:09:39,150 INFO L226 Difference]: Without dead ends: 524 [2024-09-12 23:09:39,151 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-09-12 23:09:39,151 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 34 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-09-12 23:09:39,152 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 812 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 849 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2024-09-12 23:09:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-09-12 23:09:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 514. [2024-09-12 23:09:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 280 states have (on average 1.1285714285714286) internal successors, (316), 281 states have internal predecessors, (316), 183 states have call successors, (183), 51 states have call predecessors, (183), 50 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-12 23:09:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 680 transitions. [2024-09-12 23:09:39,553 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 680 transitions. Word has length 164 [2024-09-12 23:09:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:09:39,553 INFO L474 AbstractCegarLoop]: Abstraction has 514 states and 680 transitions. [2024-09-12 23:09:39,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-12 23:09:39,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:09:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 680 transitions. [2024-09-12 23:09:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-09-12 23:09:39,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:09:39,554 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:09:39,567 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-12 23:09:39,755 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 23:09:39,755 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:09:39,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:09:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1039525467, now seen corresponding path program 15 times [2024-09-12 23:09:39,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:09:39,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651040952] [2024-09-12 23:09:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:09:39,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:09:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:09:39,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940994641] [2024-09-12 23:09:39,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:09:39,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:09:39,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:09:39,776 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 23:09:39,776 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 23:09:39,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 23:09:39,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:09:39,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 23:09:39,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:09:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 174 proven. 32 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2024-09-12 23:09:42,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:09:42,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:09:42,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651040952] [2024-09-12 23:09:42,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:09:42,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940994641] [2024-09-12 23:09:42,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940994641] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:09:42,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:09:42,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-12 23:09:42,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980833378] [2024-09-12 23:09:42,376 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:09:42,376 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 23:09:42,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:09:42,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 23:09:42,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-12 23:09:42,376 INFO L87 Difference]: Start difference. First operand 514 states and 680 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-12 23:09:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:09:44,819 INFO L93 Difference]: Finished difference Result 574 states and 765 transitions. [2024-09-12 23:09:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 23:09:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 167 [2024-09-12 23:09:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:09:44,822 INFO L225 Difference]: With dead ends: 574 [2024-09-12 23:09:44,822 INFO L226 Difference]: Without dead ends: 572 [2024-09-12 23:09:44,822 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 23:09:44,823 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 23:09:44,823 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 486 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 23:09:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-12 23:09:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 568. [2024-09-12 23:09:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 307 states have (on average 1.1302931596091206) internal successors, (347), 308 states have internal predecessors, (347), 207 states have call successors, (207), 54 states have call predecessors, (207), 53 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-12 23:09:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 759 transitions. [2024-09-12 23:09:45,235 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 759 transitions. Word has length 167 [2024-09-12 23:09:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:09:45,235 INFO L474 AbstractCegarLoop]: Abstraction has 568 states and 759 transitions. [2024-09-12 23:09:45,235 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-12 23:09:45,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:09:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 759 transitions. [2024-09-12 23:09:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-12 23:09:45,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:09:45,237 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:09:45,250 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 23:09:45,437 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 23:09:45,438 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:09:45,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:09:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash 487523073, now seen corresponding path program 4 times [2024-09-12 23:09:45,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:09:45,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856475206] [2024-09-12 23:09:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:09:45,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:09:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:09:45,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109650102] [2024-09-12 23:09:45,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 23:09:45,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:09:45,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:09:45,457 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 23:09:45,459 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 23:09:45,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 23:09:45,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:09:45,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-12 23:09:45,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:09:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 113 proven. 110 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-12 23:09:46,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:09:50,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:09:50,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856475206] [2024-09-12 23:09:50,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:09:50,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109650102] [2024-09-12 23:09:50,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109650102] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:09:50,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:09:50,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-12 23:09:50,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358529211] [2024-09-12 23:09:50,255 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:09:50,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 23:09:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:09:50,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 23:09:50,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 23:09:50,256 INFO L87 Difference]: Start difference. First operand 568 states and 759 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-12 23:09:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:09:52,056 INFO L93 Difference]: Finished difference Result 628 states and 839 transitions. [2024-09-12 23:09:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 23:09:52,057 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 170 [2024-09-12 23:09:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:09:52,059 INFO L225 Difference]: With dead ends: 628 [2024-09-12 23:09:52,060 INFO L226 Difference]: Without dead ends: 621 [2024-09-12 23:09:52,060 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 23:09:52,061 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 23:09:52,061 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 490 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 23:09:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2024-09-12 23:09:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 596. [2024-09-12 23:09:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 323 states have (on average 1.130030959752322) internal successors, (365), 324 states have internal predecessors, (365), 215 states have call successors, (215), 58 states have call predecessors, (215), 57 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2024-09-12 23:09:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 793 transitions. [2024-09-12 23:09:52,498 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 793 transitions. Word has length 170 [2024-09-12 23:09:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:09:52,499 INFO L474 AbstractCegarLoop]: Abstraction has 596 states and 793 transitions. [2024-09-12 23:09:52,499 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-12 23:09:52,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:09:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 793 transitions. [2024-09-12 23:09:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-12 23:09:52,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:09:52,500 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:09:52,514 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 23:09:52,701 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 23:09:52,701 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:09:52,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:09:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1959567971, now seen corresponding path program 5 times [2024-09-12 23:09:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:09:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948970685] [2024-09-12 23:09:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:09:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:09:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:09:52,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512325286] [2024-09-12 23:09:52,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 23:09:52,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:09:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:09:52,715 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 23:09:52,716 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 23:09:52,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 23:09:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:09:52,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-12 23:09:52,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:10:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 133 proven. 144 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2024-09-12 23:10:12,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:10:15,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:10:15,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948970685] [2024-09-12 23:10:15,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:10:15,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512325286] [2024-09-12 23:10:15,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512325286] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:10:15,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:10:15,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-12 23:10:15,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63662018] [2024-09-12 23:10:15,321 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:10:15,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 23:10:15,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:10:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 23:10:15,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=613, Unknown=3, NotChecked=0, Total=702 [2024-09-12 23:10:15,322 INFO L87 Difference]: Start difference. First operand 596 states and 793 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-12 23:10:19,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:10:23,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:10:27,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:10:29,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:10:33,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:10:38,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:10:42,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:10:46,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:10:50,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:02,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:06,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:11,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:16,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:20,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:21,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:23,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:34,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:40,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.68s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:44,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:48,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:53,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:11:57,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:01,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:06,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:10,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:12,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:17,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:22,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:26,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:30,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:35,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:12:35,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:12:35,822 INFO L93 Difference]: Finished difference Result 646 states and 859 transitions. [2024-09-12 23:12:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 23:12:35,822 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) Word has length 170 [2024-09-12 23:12:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:12:35,825 INFO L225 Difference]: With dead ends: 646 [2024-09-12 23:12:35,825 INFO L226 Difference]: Without dead ends: 639 [2024-09-12 23:12:35,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=145, Invalid=1041, Unknown=4, NotChecked=0, Total=1190 [2024-09-12 23:12:35,826 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 32 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 29 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:12:35,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 923 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1050 Invalid, 17 Unknown, 0 Unchecked, 123.0s Time] [2024-09-12 23:12:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2024-09-12 23:12:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 614. [2024-09-12 23:12:36,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 334 states have (on average 1.1287425149700598) internal successors, (377), 335 states have internal predecessors, (377), 219 states have call successors, (219), 61 states have call predecessors, (219), 60 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2024-09-12 23:12:36,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 813 transitions. [2024-09-12 23:12:36,285 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 813 transitions. Word has length 170 [2024-09-12 23:12:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:12:36,285 INFO L474 AbstractCegarLoop]: Abstraction has 614 states and 813 transitions. [2024-09-12 23:12:36,285 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-12 23:12:36,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:12:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 813 transitions. [2024-09-12 23:12:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-09-12 23:12:36,287 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:12:36,287 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:12:36,303 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 23:12:36,488 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 23:12:36,488 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:12:36,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:12:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 814592105, now seen corresponding path program 16 times [2024-09-12 23:12:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:12:36,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331284708] [2024-09-12 23:12:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:12:36,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:12:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:12:36,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936759624] [2024-09-12 23:12:36,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 23:12:36,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:12:36,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:12:36,508 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 23:12:36,508 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 23:12:36,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 23:12:36,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:12:36,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-12 23:12:36,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:12:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 131 proven. 128 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2024-09-12 23:12:38,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:12:38,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:12:38,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331284708] [2024-09-12 23:12:38,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:12:38,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936759624] [2024-09-12 23:12:38,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936759624] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:12:38,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:12:38,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-12 23:12:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3461320] [2024-09-12 23:12:38,883 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:12:38,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 23:12:38,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:12:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 23:12:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-09-12 23:12:38,884 INFO L87 Difference]: Start difference. First operand 614 states and 813 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-12 23:12:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:12:40,709 INFO L93 Difference]: Finished difference Result 651 states and 861 transitions. [2024-09-12 23:12:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 23:12:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) Word has length 186 [2024-09-12 23:12:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:12:40,713 INFO L225 Difference]: With dead ends: 651 [2024-09-12 23:12:40,713 INFO L226 Difference]: Without dead ends: 649 [2024-09-12 23:12:40,713 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2024-09-12 23:12:40,713 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 36 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 23:12:40,714 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 822 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 23:12:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2024-09-12 23:12:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2024-09-12 23:12:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 352 states have (on average 1.1278409090909092) internal successors, (397), 353 states have internal predecessors, (397), 231 states have call successors, (231), 64 states have call predecessors, (231), 63 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2024-09-12 23:12:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 857 transitions. [2024-09-12 23:12:41,186 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 857 transitions. Word has length 186 [2024-09-12 23:12:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:12:41,186 INFO L474 AbstractCegarLoop]: Abstraction has 647 states and 857 transitions. [2024-09-12 23:12:41,186 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-12 23:12:41,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:12:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 857 transitions. [2024-09-12 23:12:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-09-12 23:12:41,187 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:12:41,187 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:12:41,200 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-12 23:12:41,388 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 23:12:41,388 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:12:41,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:12:41,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1585100363, now seen corresponding path program 17 times [2024-09-12 23:12:41,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:12:41,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820017785] [2024-09-12 23:12:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:12:41,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:12:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:12:41,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547328530] [2024-09-12 23:12:41,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 23:12:41,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:12:41,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:12:41,405 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 23:12:41,407 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-12 23:12:41,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-12 23:12:41,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:12:41,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 23:12:41,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:12:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 131 proven. 128 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2024-09-12 23:12:44,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:12:49,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:12:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820017785] [2024-09-12 23:12:49,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:12:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547328530] [2024-09-12 23:12:49,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547328530] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:12:49,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:12:49,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-12 23:12:49,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475687023] [2024-09-12 23:12:49,247 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:12:49,247 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 23:12:49,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:12:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 23:12:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=399, Unknown=1, NotChecked=0, Total=462 [2024-09-12 23:12:49,248 INFO L87 Difference]: Start difference. First operand 647 states and 857 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-12 23:12:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:12:55,051 INFO L93 Difference]: Finished difference Result 682 states and 904 transitions. [2024-09-12 23:12:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 23:12:55,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) Word has length 186 [2024-09-12 23:12:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:12:55,054 INFO L225 Difference]: With dead ends: 682 [2024-09-12 23:12:55,054 INFO L226 Difference]: Without dead ends: 680 [2024-09-12 23:12:55,054 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=115, Invalid=814, Unknown=1, NotChecked=0, Total=930 [2024-09-12 23:12:55,054 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 37 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-12 23:12:55,055 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 851 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-09-12 23:12:55,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2024-09-12 23:12:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 647. [2024-09-12 23:12:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 352 states have (on average 1.1278409090909092) internal successors, (397), 353 states have internal predecessors, (397), 231 states have call successors, (231), 64 states have call predecessors, (231), 63 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2024-09-12 23:12:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 857 transitions. [2024-09-12 23:12:55,542 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 857 transitions. Word has length 186 [2024-09-12 23:12:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:12:55,542 INFO L474 AbstractCegarLoop]: Abstraction has 647 states and 857 transitions. [2024-09-12 23:12:55,542 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-12 23:12:55,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:12:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 857 transitions. [2024-09-12 23:12:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-09-12 23:12:55,543 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:12:55,543 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:12:55,550 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-12 23:12:55,744 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-12 23:12:55,744 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:12:55,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:12:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash -31370835, now seen corresponding path program 18 times [2024-09-12 23:12:55,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:12:55,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399806604] [2024-09-12 23:12:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:12:55,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:12:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:12:55,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028784380] [2024-09-12 23:12:55,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 23:12:55,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:12:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:12:55,770 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:12:55,771 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-12 23:12:55,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 23:12:55,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:12:55,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 23:12:55,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:12:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 228 proven. 88 refuted. 0 times theorem prover too weak. 1293 trivial. 0 not checked. [2024-09-12 23:12:56,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:12:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:12:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399806604] [2024-09-12 23:12:57,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:12:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028784380] [2024-09-12 23:12:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028784380] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:12:57,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:12:57,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-12 23:12:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829259647] [2024-09-12 23:12:57,108 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:12:57,108 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 23:12:57,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:12:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 23:12:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-12 23:12:57,109 INFO L87 Difference]: Start difference. First operand 647 states and 857 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2024-09-12 23:12:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:12:58,820 INFO L93 Difference]: Finished difference Result 667 states and 873 transitions. [2024-09-12 23:12:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 23:12:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 186 [2024-09-12 23:12:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:12:58,822 INFO L225 Difference]: With dead ends: 667 [2024-09-12 23:12:58,822 INFO L226 Difference]: Without dead ends: 663 [2024-09-12 23:12:58,823 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-09-12 23:12:58,823 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 23:12:58,823 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 384 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 23:12:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2024-09-12 23:12:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 579. [2024-09-12 23:12:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 323 states have (on average 1.1145510835913313) internal successors, (360), 324 states have internal predecessors, (360), 194 states have call successors, (194), 63 states have call predecessors, (194), 61 states have return successors, (192), 191 states have call predecessors, (192), 192 states have call successors, (192) [2024-09-12 23:12:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 746 transitions. [2024-09-12 23:12:59,245 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 746 transitions. Word has length 186 [2024-09-12 23:12:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:12:59,245 INFO L474 AbstractCegarLoop]: Abstraction has 579 states and 746 transitions. [2024-09-12 23:12:59,245 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2024-09-12 23:12:59,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:12:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 746 transitions. [2024-09-12 23:12:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-09-12 23:12:59,246 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:12:59,247 INFO L216 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:12:59,253 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-12 23:12:59,447 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-12 23:12:59,451 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:12:59,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:12:59,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1782919488, now seen corresponding path program 6 times [2024-09-12 23:12:59,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:12:59,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104360834] [2024-09-12 23:12:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:12:59,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:12:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:12:59,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425156130] [2024-09-12 23:12:59,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 23:12:59,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:12:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:12:59,467 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:12:59,468 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-12 23:12:59,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 23:12:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:12:59,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-12 23:12:59,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:13:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 173 proven. 148 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2024-09-12 23:13:02,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:13:08,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:13:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104360834] [2024-09-12 23:13:08,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:13:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425156130] [2024-09-12 23:13:08,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425156130] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:13:08,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:13:08,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-12 23:13:08,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396774293] [2024-09-12 23:13:08,876 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:13:08,876 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 23:13:08,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:13:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 23:13:08,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=519, Unknown=1, NotChecked=0, Total=600 [2024-09-12 23:13:08,877 INFO L87 Difference]: Start difference. First operand 579 states and 746 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-12 23:13:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:13:12,836 INFO L93 Difference]: Finished difference Result 653 states and 842 transitions. [2024-09-12 23:13:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 23:13:12,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) Word has length 192 [2024-09-12 23:13:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:13:12,838 INFO L225 Difference]: With dead ends: 653 [2024-09-12 23:13:12,839 INFO L226 Difference]: Without dead ends: 648 [2024-09-12 23:13:12,839 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=130, Invalid=799, Unknown=1, NotChecked=0, Total=930 [2024-09-12 23:13:12,839 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:13:12,839 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 590 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-12 23:13:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2024-09-12 23:13:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 609. [2024-09-12 23:13:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 343 states have (on average 1.1078717201166182) internal successors, (380), 346 states have internal predecessors, (380), 200 states have call successors, (200), 67 states have call predecessors, (200), 65 states have return successors, (198), 195 states have call predecessors, (198), 198 states have call successors, (198) [2024-09-12 23:13:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 778 transitions. [2024-09-12 23:13:13,300 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 778 transitions. Word has length 192 [2024-09-12 23:13:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:13:13,300 INFO L474 AbstractCegarLoop]: Abstraction has 609 states and 778 transitions. [2024-09-12 23:13:13,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-12 23:13:13,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:13:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 778 transitions. [2024-09-12 23:13:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-09-12 23:13:13,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:13:13,302 INFO L216 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:13:13,315 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-12 23:13:13,502 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-12 23:13:13,503 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:13:13,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:13:13,503 INFO L85 PathProgramCache]: Analyzing trace with hash 115595426, now seen corresponding path program 7 times [2024-09-12 23:13:13,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:13:13,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380546431] [2024-09-12 23:13:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:13:13,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:13:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:13:13,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042513799] [2024-09-12 23:13:13,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 23:13:13,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:13:13,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:13:13,522 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:13:13,523 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-12 23:13:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:13:13,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-12 23:13:13,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:13:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 133 proven. 146 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2024-09-12 23:13:14,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:13:21,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:13:21,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380546431] [2024-09-12 23:13:21,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:13:21,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042513799] [2024-09-12 23:13:21,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042513799] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:13:21,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:13:21,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-12 23:13:21,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693684018] [2024-09-12 23:13:21,008 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:13:21,008 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 23:13:21,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:13:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 23:13:21,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 23:13:21,009 INFO L87 Difference]: Start difference. First operand 609 states and 778 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2024-09-12 23:13:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:13:23,393 INFO L93 Difference]: Finished difference Result 654 states and 840 transitions. [2024-09-12 23:13:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 23:13:23,393 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) Word has length 192 [2024-09-12 23:13:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:13:23,396 INFO L225 Difference]: With dead ends: 654 [2024-09-12 23:13:23,396 INFO L226 Difference]: Without dead ends: 649 [2024-09-12 23:13:23,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=235, Invalid=1835, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 23:13:23,397 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 51 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:13:23,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 866 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-12 23:13:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2024-09-12 23:13:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 623. [2024-09-12 23:13:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 351 states have (on average 1.1082621082621082) internal successors, (389), 354 states have internal predecessors, (389), 204 states have call successors, (204), 69 states have call predecessors, (204), 67 states have return successors, (202), 199 states have call predecessors, (202), 202 states have call successors, (202) [2024-09-12 23:13:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 795 transitions. [2024-09-12 23:13:23,884 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 795 transitions. Word has length 192 [2024-09-12 23:13:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:13:23,885 INFO L474 AbstractCegarLoop]: Abstraction has 623 states and 795 transitions. [2024-09-12 23:13:23,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2024-09-12 23:13:23,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:13:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 795 transitions. [2024-09-12 23:13:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-09-12 23:13:23,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:13:23,886 INFO L216 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:13:23,899 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-12 23:13:24,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-12 23:13:24,087 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:13:24,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:13:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1587640324, now seen corresponding path program 8 times [2024-09-12 23:13:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:13:24,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538086342] [2024-09-12 23:13:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:13:24,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:13:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:13:24,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851299601] [2024-09-12 23:13:24,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:13:24,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:13:24,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:13:24,101 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:13:24,102 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-12 23:13:24,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:13:24,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:13:24,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-12 23:13:24,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:13:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 133 proven. 137 refuted. 0 times theorem prover too weak. 1455 trivial. 0 not checked. [2024-09-12 23:13:25,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:13:28,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:13:28,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538086342] [2024-09-12 23:13:28,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:13:28,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851299601] [2024-09-12 23:13:28,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851299601] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:13:28,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:13:28,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-12 23:13:28,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425427299] [2024-09-12 23:13:28,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:13:28,808 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 23:13:28,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:13:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 23:13:28,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-09-12 23:13:28,808 INFO L87 Difference]: Start difference. First operand 623 states and 795 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-12 23:13:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:13:32,432 INFO L93 Difference]: Finished difference Result 698 states and 905 transitions. [2024-09-12 23:13:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 23:13:32,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 192 [2024-09-12 23:13:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:13:32,435 INFO L225 Difference]: With dead ends: 698 [2024-09-12 23:13:32,435 INFO L226 Difference]: Without dead ends: 693 [2024-09-12 23:13:32,435 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 23:13:32,435 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 42 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-12 23:13:32,436 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 912 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-12 23:13:32,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2024-09-12 23:13:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 668. [2024-09-12 23:13:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 373 states have (on average 1.1126005361930296) internal successors, (415), 376 states have internal predecessors, (415), 224 states have call successors, (224), 72 states have call predecessors, (224), 70 states have return successors, (222), 219 states have call predecessors, (222), 222 states have call successors, (222) [2024-09-12 23:13:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 861 transitions. [2024-09-12 23:13:32,979 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 861 transitions. Word has length 192 [2024-09-12 23:13:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:13:32,979 INFO L474 AbstractCegarLoop]: Abstraction has 668 states and 861 transitions. [2024-09-12 23:13:32,980 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-12 23:13:32,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:13:32,980 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 861 transitions. [2024-09-12 23:13:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-09-12 23:13:32,981 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:13:32,981 INFO L216 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:13:32,993 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-12 23:13:33,181 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-12 23:13:33,182 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:13:33,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:13:33,182 INFO L85 PathProgramCache]: Analyzing trace with hash 238086553, now seen corresponding path program 9 times [2024-09-12 23:13:33,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:13:33,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023252599] [2024-09-12 23:13:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:13:33,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:13:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:13:33,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787989634] [2024-09-12 23:13:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:13:33,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:13:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:13:33,198 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:13:33,199 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-12 23:13:33,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 23:13:33,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:13:33,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-12 23:13:33,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:13:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 276 proven. 208 refuted. 0 times theorem prover too weak. 1249 trivial. 0 not checked. [2024-09-12 23:13:54,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:14:02,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:14:02,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023252599] [2024-09-12 23:14:02,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:14:02,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787989634] [2024-09-12 23:14:02,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787989634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:14:02,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:14:02,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-12 23:14:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444138239] [2024-09-12 23:14:02,556 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:14:02,557 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 23:14:02,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:14:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 23:14:02,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 23:14:02,557 INFO L87 Difference]: Start difference. First operand 668 states and 861 transitions. Second operand has 25 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2024-09-12 23:14:14,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:14:22,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:14:23,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:14:25,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:14:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:14:31,379 INFO L93 Difference]: Finished difference Result 742 states and 958 transitions. [2024-09-12 23:14:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 23:14:31,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) Word has length 195 [2024-09-12 23:14:31,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:14:31,382 INFO L225 Difference]: With dead ends: 742 [2024-09-12 23:14:31,382 INFO L226 Difference]: Without dead ends: 737 [2024-09-12 23:14:31,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 23:14:31,383 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 44 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2024-09-12 23:14:31,383 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 618 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 946 Invalid, 1 Unknown, 0 Unchecked, 22.7s Time] [2024-09-12 23:14:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2024-09-12 23:14:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 677. [2024-09-12 23:14:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 381 states have (on average 1.1076115485564304) internal successors, (422), 385 states have internal predecessors, (422), 223 states have call successors, (223), 74 states have call predecessors, (223), 72 states have return successors, (221), 217 states have call predecessors, (221), 221 states have call successors, (221) [2024-09-12 23:14:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 866 transitions. [2024-09-12 23:14:31,925 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 866 transitions. Word has length 195 [2024-09-12 23:14:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:14:31,925 INFO L474 AbstractCegarLoop]: Abstraction has 677 states and 866 transitions. [2024-09-12 23:14:31,925 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2024-09-12 23:14:31,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:14:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 866 transitions. [2024-09-12 23:14:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-09-12 23:14:31,926 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:14:31,926 INFO L216 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:14:31,932 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-12 23:14:32,127 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-12 23:14:32,127 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:14:32,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:14:32,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1431502503, now seen corresponding path program 10 times [2024-09-12 23:14:32,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:14:32,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948088123] [2024-09-12 23:14:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:14:32,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:14:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:14:32,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965902462] [2024-09-12 23:14:32,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 23:14:32,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:14:32,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:14:32,148 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:14:32,149 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-12 23:14:32,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 23:14:32,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:14:32,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-12 23:14:32,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:14:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 171 proven. 191 refuted. 0 times theorem prover too weak. 1371 trivial. 0 not checked. [2024-09-12 23:14:36,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:14:41,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:14:41,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948088123] [2024-09-12 23:14:41,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:14:41,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965902462] [2024-09-12 23:14:41,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965902462] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:14:41,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:14:41,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-12 23:14:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430727623] [2024-09-12 23:14:41,229 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:14:41,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 23:14:41,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:14:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 23:14:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-09-12 23:14:41,230 INFO L87 Difference]: Start difference. First operand 677 states and 866 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2024-09-12 23:14:51,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:14:54,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:14:55,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:14:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:14:58,511 INFO L93 Difference]: Finished difference Result 739 states and 955 transitions. [2024-09-12 23:14:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 23:14:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) Word has length 195 [2024-09-12 23:14:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:14:58,514 INFO L225 Difference]: With dead ends: 739 [2024-09-12 23:14:58,515 INFO L226 Difference]: Without dead ends: 734 [2024-09-12 23:14:58,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 23:14:58,515 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 50 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2024-09-12 23:14:58,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1117 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2024-09-12 23:14:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2024-09-12 23:14:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 709. [2024-09-12 23:14:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 397 states have (on average 1.1108312342569269) internal successors, (441), 400 states have internal predecessors, (441), 236 states have call successors, (236), 77 states have call predecessors, (236), 75 states have return successors, (234), 231 states have call predecessors, (234), 234 states have call successors, (234) [2024-09-12 23:14:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 911 transitions. [2024-09-12 23:14:59,104 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 911 transitions. Word has length 195 [2024-09-12 23:14:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:14:59,104 INFO L474 AbstractCegarLoop]: Abstraction has 709 states and 911 transitions. [2024-09-12 23:14:59,104 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2024-09-12 23:14:59,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:14:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 911 transitions. [2024-09-12 23:14:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-09-12 23:14:59,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:14:59,106 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:14:59,121 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-12 23:14:59,306 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:14:59,306 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:14:59,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:14:59,307 INFO L85 PathProgramCache]: Analyzing trace with hash -616402339, now seen corresponding path program 11 times [2024-09-12 23:14:59,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:14:59,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023286279] [2024-09-12 23:14:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:14:59,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:14:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:14:59,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233627500] [2024-09-12 23:14:59,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 23:14:59,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:14:59,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:14:59,324 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:14:59,325 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-12 23:14:59,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-09-12 23:14:59,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:14:59,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-12 23:14:59,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:15:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 81 proven. 251 refuted. 0 times theorem prover too weak. 1915 trivial. 0 not checked. [2024-09-12 23:15:02,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:15:11,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:15:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023286279] [2024-09-12 23:15:11,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:15:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233627500] [2024-09-12 23:15:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233627500] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:15:11,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:15:11,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-12 23:15:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565279077] [2024-09-12 23:15:11,204 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:15:11,204 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 23:15:11,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:15:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 23:15:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2024-09-12 23:15:11,205 INFO L87 Difference]: Start difference. First operand 709 states and 911 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 12 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2024-09-12 23:15:16,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 23:15:20,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 23:15:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:15:22,151 INFO L93 Difference]: Finished difference Result 760 states and 977 transitions. [2024-09-12 23:15:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 23:15:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 12 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) Word has length 214 [2024-09-12 23:15:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:15:22,154 INFO L225 Difference]: With dead ends: 760 [2024-09-12 23:15:22,154 INFO L226 Difference]: Without dead ends: 755 [2024-09-12 23:15:22,154 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 23:15:22,155 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 45 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-09-12 23:15:22,155 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1111 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2024-09-12 23:15:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2024-09-12 23:15:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 723. [2024-09-12 23:15:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 405 states have (on average 1.1111111111111112) internal successors, (450), 408 states have internal predecessors, (450), 240 states have call successors, (240), 79 states have call predecessors, (240), 77 states have return successors, (238), 235 states have call predecessors, (238), 238 states have call successors, (238) [2024-09-12 23:15:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 928 transitions. [2024-09-12 23:15:22,746 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 928 transitions. Word has length 214 [2024-09-12 23:15:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:15:22,746 INFO L474 AbstractCegarLoop]: Abstraction has 723 states and 928 transitions. [2024-09-12 23:15:22,746 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 12 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2024-09-12 23:15:22,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:15:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 928 transitions. [2024-09-12 23:15:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-09-12 23:15:22,748 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:15:22,748 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:15:22,761 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-12 23:15:22,948 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-09-12 23:15:22,948 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:15:22,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:15:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1773976159, now seen corresponding path program 12 times [2024-09-12 23:15:22,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:15:22,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228340638] [2024-09-12 23:15:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:15:22,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:15:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:15:22,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902927856] [2024-09-12 23:15:22,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 23:15:22,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:15:22,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:15:22,963 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:15:22,965 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-12 23:15:23,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 23:15:23,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:15:23,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 23:15:23,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:15:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 205 proven. 181 refuted. 0 times theorem prover too weak. 1861 trivial. 0 not checked. [2024-09-12 23:15:29,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:15:33,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:15:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228340638] [2024-09-12 23:15:33,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:15:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902927856] [2024-09-12 23:15:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902927856] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:15:33,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:15:33,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-12 23:15:33,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840993002] [2024-09-12 23:15:33,296 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:15:33,296 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 23:15:33,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:15:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 23:15:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=512, Unknown=2, NotChecked=0, Total=600 [2024-09-12 23:15:33,297 INFO L87 Difference]: Start difference. First operand 723 states and 928 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-12 23:15:38,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:15:42,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:15:46,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:15:46,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:15:46,986 INFO L93 Difference]: Finished difference Result 811 states and 1040 transitions. [2024-09-12 23:15:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 23:15:46,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 214 [2024-09-12 23:15:46,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:15:46,990 INFO L225 Difference]: With dead ends: 811 [2024-09-12 23:15:46,990 INFO L226 Difference]: Without dead ends: 806 [2024-09-12 23:15:46,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=119, Invalid=635, Unknown=2, NotChecked=0, Total=756 [2024-09-12 23:15:46,990 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 24 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-09-12 23:15:46,990 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 412 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 569 Invalid, 1 Unknown, 0 Unchecked, 12.3s Time] [2024-09-12 23:15:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2024-09-12 23:15:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 564. [2024-09-12 23:15:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 326 states have (on average 1.0889570552147239) internal successors, (355), 330 states have internal predecessors, (355), 168 states have call successors, (168), 71 states have call predecessors, (168), 69 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2024-09-12 23:15:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 689 transitions. [2024-09-12 23:15:47,445 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 689 transitions. Word has length 214 [2024-09-12 23:15:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:15:47,445 INFO L474 AbstractCegarLoop]: Abstraction has 564 states and 689 transitions. [2024-09-12 23:15:47,445 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-12 23:15:47,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:15:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 689 transitions. [2024-09-12 23:15:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2024-09-12 23:15:47,446 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:15:47,447 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:15:47,453 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-09-12 23:15:47,650 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:15:47,650 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:15:47,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:15:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1771553478, now seen corresponding path program 13 times [2024-09-12 23:15:47,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:15:47,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85680591] [2024-09-12 23:15:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:15:47,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:15:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:15:47,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447215631] [2024-09-12 23:15:47,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 23:15:47,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:15:47,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:15:47,675 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:15:47,676 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-12 23:15:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:15:47,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-12 23:15:47,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:15:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 191 proven. 245 refuted. 0 times theorem prover too weak. 1819 trivial. 0 not checked. [2024-09-12 23:15:49,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:15:50,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:15:50,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85680591] [2024-09-12 23:15:50,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:15:50,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447215631] [2024-09-12 23:15:50,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447215631] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:15:50,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:15:50,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-12 23:15:50,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123765237] [2024-09-12 23:15:50,787 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:15:50,787 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 23:15:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:15:50,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 23:15:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2024-09-12 23:15:50,788 INFO L87 Difference]: Start difference. First operand 564 states and 689 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 14 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (37), 13 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-12 23:15:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:15:53,977 INFO L93 Difference]: Finished difference Result 630 states and 788 transitions. [2024-09-12 23:15:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 23:15:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 14 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (37), 13 states have call predecessors, (37), 13 states have call successors, (37) Word has length 217 [2024-09-12 23:15:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:15:53,980 INFO L225 Difference]: With dead ends: 630 [2024-09-12 23:15:53,980 INFO L226 Difference]: Without dead ends: 625 [2024-09-12 23:15:53,981 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 23:15:53,981 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 58 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:15:53,981 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 955 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-12 23:15:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2024-09-12 23:15:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 598. [2024-09-12 23:15:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 341 states have (on average 1.096774193548387) internal successors, (374), 344 states have internal predecessors, (374), 185 states have call successors, (185), 73 states have call predecessors, (185), 71 states have return successors, (183), 180 states have call predecessors, (183), 183 states have call successors, (183) [2024-09-12 23:15:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 742 transitions. [2024-09-12 23:15:54,492 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 742 transitions. Word has length 217 [2024-09-12 23:15:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:15:54,492 INFO L474 AbstractCegarLoop]: Abstraction has 598 states and 742 transitions. [2024-09-12 23:15:54,492 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 14 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (37), 13 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-12 23:15:54,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:15:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 742 transitions. [2024-09-12 23:15:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2024-09-12 23:15:54,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:15:54,493 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:15:54,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-12 23:15:54,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:15:54,694 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:15:54,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:15:54,694 INFO L85 PathProgramCache]: Analyzing trace with hash 380828440, now seen corresponding path program 14 times [2024-09-12 23:15:54,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:15:54,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758096983] [2024-09-12 23:15:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:15:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:15:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:15:54,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84782447] [2024-09-12 23:15:54,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:15:54,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:15:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:15:54,711 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:15:54,713 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-12 23:15:54,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:15:54,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:15:54,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-12 23:15:54,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:15:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 191 proven. 236 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2024-09-12 23:15:56,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:15:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 295 proven. 100 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2024-09-12 23:15:58,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:15:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758096983] [2024-09-12 23:15:58,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:15:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84782447] [2024-09-12 23:15:58,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84782447] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:15:58,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:15:58,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 33 [2024-09-12 23:15:58,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860471760] [2024-09-12 23:15:58,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:15:58,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 23:15:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:15:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 23:15:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 23:15:58,729 INFO L87 Difference]: Start difference. First operand 598 states and 742 transitions. Second operand has 33 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 19 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (61), 17 states have call predecessors, (61), 17 states have call successors, (61) [2024-09-12 23:16:02,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 23:16:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:16:12,306 INFO L93 Difference]: Finished difference Result 745 states and 973 transitions. [2024-09-12 23:16:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-12 23:16:12,306 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 19 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (61), 17 states have call predecessors, (61), 17 states have call successors, (61) Word has length 217 [2024-09-12 23:16:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:16:12,309 INFO L225 Difference]: With dead ends: 745 [2024-09-12 23:16:12,309 INFO L226 Difference]: Without dead ends: 739 [2024-09-12 23:16:12,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 400 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=835, Invalid=4135, Unknown=0, NotChecked=0, Total=4970 [2024-09-12 23:16:12,310 INFO L434 NwaCegarLoop]: 84 mSDtfsCounter, 108 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-09-12 23:16:12,310 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1481 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2024-09-12 23:16:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2024-09-12 23:16:12,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 638. [2024-09-12 23:16:12,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 358 states have (on average 1.106145251396648) internal successors, (396), 362 states have internal predecessors, (396), 206 states have call successors, (206), 75 states have call predecessors, (206), 73 states have return successors, (204), 200 states have call predecessors, (204), 204 states have call successors, (204) [2024-09-12 23:16:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 806 transitions. [2024-09-12 23:16:12,984 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 806 transitions. Word has length 217 [2024-09-12 23:16:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:16:12,985 INFO L474 AbstractCegarLoop]: Abstraction has 638 states and 806 transitions. [2024-09-12 23:16:12,985 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 19 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (61), 17 states have call predecessors, (61), 17 states have call successors, (61) [2024-09-12 23:16:12,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:16:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 806 transitions. [2024-09-12 23:16:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2024-09-12 23:16:12,986 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:16:12,986 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:16:12,999 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-12 23:16:13,190 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-12 23:16:13,191 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:16:13,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:16:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1852873338, now seen corresponding path program 15 times [2024-09-12 23:16:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:16:13,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685781969] [2024-09-12 23:16:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:16:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:16:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:16:13,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609913454] [2024-09-12 23:16:13,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:16:13,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:16:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:16:13,220 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:16:13,221 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-12 23:16:13,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 23:16:13,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:16:13,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-12 23:16:13,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:16:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 307 proven. 78 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2024-09-12 23:16:14,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:16:15,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:16:15,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685781969] [2024-09-12 23:16:15,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:16:15,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609913454] [2024-09-12 23:16:15,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609913454] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:16:15,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:16:15,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-12 23:16:15,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076825564] [2024-09-12 23:16:15,284 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:16:15,284 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 23:16:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:16:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 23:16:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-09-12 23:16:15,285 INFO L87 Difference]: Start difference. First operand 638 states and 806 transitions. Second operand has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-12 23:16:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:16:18,569 INFO L93 Difference]: Finished difference Result 727 states and 931 transitions. [2024-09-12 23:16:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 23:16:18,569 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 217 [2024-09-12 23:16:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:16:18,572 INFO L225 Difference]: With dead ends: 727 [2024-09-12 23:16:18,572 INFO L226 Difference]: Without dead ends: 722 [2024-09-12 23:16:18,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=309, Invalid=1331, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 23:16:18,572 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 35 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:16:18,573 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 450 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-12 23:16:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2024-09-12 23:16:19,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 668. [2024-09-12 23:16:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 377 states have (on average 1.103448275862069) internal successors, (416), 383 states have internal predecessors, (416), 212 states have call successors, (212), 80 states have call predecessors, (212), 78 states have return successors, (210), 204 states have call predecessors, (210), 210 states have call successors, (210) [2024-09-12 23:16:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 838 transitions. [2024-09-12 23:16:19,300 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 838 transitions. Word has length 217 [2024-09-12 23:16:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:16:19,300 INFO L474 AbstractCegarLoop]: Abstraction has 668 states and 838 transitions. [2024-09-12 23:16:19,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-12 23:16:19,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:16:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 838 transitions. [2024-09-12 23:16:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2024-09-12 23:16:19,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:16:19,302 INFO L216 NwaCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:16:19,310 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-12 23:16:19,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-09-12 23:16:19,503 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:16:19,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:16:19,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1477945401, now seen corresponding path program 16 times [2024-09-12 23:16:19,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:16:19,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3885790] [2024-09-12 23:16:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:16:19,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:16:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:16:19,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718829958] [2024-09-12 23:16:19,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 23:16:19,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:16:19,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:16:19,521 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:16:19,522 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-12 23:16:19,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 23:16:19,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:16:19,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-12 23:16:19,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:16:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2847 backedges. 199 proven. 317 refuted. 0 times theorem prover too weak. 2331 trivial. 0 not checked. [2024-09-12 23:16:22,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:16:26,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:16:26,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3885790] [2024-09-12 23:16:26,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:16:26,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718829958] [2024-09-12 23:16:26,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718829958] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:16:26,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:16:26,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-12 23:16:26,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787688763] [2024-09-12 23:16:26,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:16:26,071 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 23:16:26,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:16:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 23:16:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 23:16:26,072 INFO L87 Difference]: Start difference. First operand 668 states and 838 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 22 states have internal predecessors, (47), 15 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 14 states have call predecessors, (41), 14 states have call successors, (41) [2024-09-12 23:16:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:16:29,734 INFO L93 Difference]: Finished difference Result 735 states and 930 transitions. [2024-09-12 23:16:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 23:16:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 22 states have internal predecessors, (47), 15 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 14 states have call predecessors, (41), 14 states have call successors, (41) Word has length 239 [2024-09-12 23:16:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:16:29,737 INFO L225 Difference]: With dead ends: 735 [2024-09-12 23:16:29,737 INFO L226 Difference]: Without dead ends: 730 [2024-09-12 23:16:29,738 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 23:16:29,738 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 62 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-12 23:16:29,738 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 868 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1823 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-12 23:16:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2024-09-12 23:16:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 682. [2024-09-12 23:16:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 385 states have (on average 1.103896103896104) internal successors, (425), 391 states have internal predecessors, (425), 216 states have call successors, (216), 82 states have call predecessors, (216), 80 states have return successors, (214), 208 states have call predecessors, (214), 214 states have call successors, (214) [2024-09-12 23:16:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 855 transitions. [2024-09-12 23:16:30,517 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 855 transitions. Word has length 239 [2024-09-12 23:16:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:16:30,517 INFO L474 AbstractCegarLoop]: Abstraction has 682 states and 855 transitions. [2024-09-12 23:16:30,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 22 states have internal predecessors, (47), 15 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 14 states have call predecessors, (41), 14 states have call successors, (41) [2024-09-12 23:16:30,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:16:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 855 transitions. [2024-09-12 23:16:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-09-12 23:16:30,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:16:30,519 INFO L216 NwaCegarLoop]: trace histogram [41, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:16:30,535 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-09-12 23:16:30,719 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:16:30,720 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:16:30,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:16:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1922876936, now seen corresponding path program 17 times [2024-09-12 23:16:30,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:16:30,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972317284] [2024-09-12 23:16:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:16:30,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:16:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:16:30,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433687968] [2024-09-12 23:16:30,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 23:16:30,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:16:30,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:16:30,740 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:16:30,740 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-12 23:16:30,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-12 23:16:30,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:16:30,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-09-12 23:16:30,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:16:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3509 backedges. 146 proven. 552 refuted. 0 times theorem prover too weak. 2811 trivial. 0 not checked. [2024-09-12 23:16:33,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:16:36,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:16:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972317284] [2024-09-12 23:16:36,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:16:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433687968] [2024-09-12 23:16:36,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433687968] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:16:36,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:16:36,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-12 23:16:36,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660032760] [2024-09-12 23:16:36,828 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:16:36,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 23:16:36,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:16:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 23:16:36,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 23:16:36,829 INFO L87 Difference]: Start difference. First operand 682 states and 855 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 15 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 14 states have call predecessors, (45), 14 states have call successors, (45) [2024-09-12 23:16:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:16:40,080 INFO L93 Difference]: Finished difference Result 742 states and 942 transitions. [2024-09-12 23:16:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 23:16:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 15 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 14 states have call predecessors, (45), 14 states have call successors, (45) Word has length 261 [2024-09-12 23:16:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:16:40,083 INFO L225 Difference]: With dead ends: 742 [2024-09-12 23:16:40,083 INFO L226 Difference]: Without dead ends: 737 [2024-09-12 23:16:40,084 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=219, Invalid=2133, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 23:16:40,084 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 54 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-12 23:16:40,084 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1408 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-12 23:16:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2024-09-12 23:16:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 696. [2024-09-12 23:16:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 393 states have (on average 1.104325699745547) internal successors, (434), 399 states have internal predecessors, (434), 220 states have call successors, (220), 84 states have call predecessors, (220), 82 states have return successors, (218), 212 states have call predecessors, (218), 218 states have call successors, (218) [2024-09-12 23:16:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 872 transitions. [2024-09-12 23:16:40,854 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 872 transitions. Word has length 261 [2024-09-12 23:16:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:16:40,855 INFO L474 AbstractCegarLoop]: Abstraction has 696 states and 872 transitions. [2024-09-12 23:16:40,855 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 15 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 14 states have call predecessors, (45), 14 states have call successors, (45) [2024-09-12 23:16:40,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:16:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 872 transitions. [2024-09-12 23:16:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-09-12 23:16:40,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:16:40,857 INFO L216 NwaCegarLoop]: trace histogram [41, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:16:40,863 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-09-12 23:16:41,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:16:41,057 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:16:41,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:16:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash 133746266, now seen corresponding path program 18 times [2024-09-12 23:16:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:16:41,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111195216] [2024-09-12 23:16:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:16:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:16:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:16:41,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991161574] [2024-09-12 23:16:41,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 23:16:41,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:16:41,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:16:41,075 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:16:41,076 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-12 23:16:41,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 23:16:41,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:16:41,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 23:16:41,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:16:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3509 backedges. 294 proven. 356 refuted. 0 times theorem prover too weak. 2859 trivial. 0 not checked. [2024-09-12 23:16:53,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:17:00,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:17:00,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111195216] [2024-09-12 23:17:00,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:17:00,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991161574] [2024-09-12 23:17:00,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991161574] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:17:00,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:17:00,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-12 23:17:00,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369962926] [2024-09-12 23:17:00,129 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:17:00,129 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 23:17:00,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:17:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 23:17:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=611, Unknown=1, NotChecked=0, Total=702 [2024-09-12 23:17:00,130 INFO L87 Difference]: Start difference. First operand 696 states and 872 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-12 23:17:04,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:17:09,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:17:11,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:17:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:17:15,352 INFO L93 Difference]: Finished difference Result 804 states and 1020 transitions. [2024-09-12 23:17:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 23:17:15,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) Word has length 261 [2024-09-12 23:17:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:17:15,355 INFO L225 Difference]: With dead ends: 804 [2024-09-12 23:17:15,355 INFO L226 Difference]: Without dead ends: 799 [2024-09-12 23:17:15,356 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=159, Invalid=962, Unknown=1, NotChecked=0, Total=1122 [2024-09-12 23:17:15,356 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 19 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-09-12 23:17:15,356 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 632 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2024-09-12 23:17:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2024-09-12 23:17:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 762. [2024-09-12 23:17:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 431 states have (on average 1.099767981438515) internal successors, (474), 440 states have internal predecessors, (474), 241 states have call successors, (241), 91 states have call predecessors, (241), 89 states have return successors, (239), 230 states have call predecessors, (239), 239 states have call successors, (239) [2024-09-12 23:17:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 954 transitions. [2024-09-12 23:17:16,449 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 954 transitions. Word has length 261 [2024-09-12 23:17:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:17:16,449 INFO L474 AbstractCegarLoop]: Abstraction has 762 states and 954 transitions. [2024-09-12 23:17:16,449 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-12 23:17:16,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:17:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 954 transitions. [2024-09-12 23:17:16,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-09-12 23:17:16,451 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:17:16,451 INFO L216 NwaCegarLoop]: trace histogram [41, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:17:16,457 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-09-12 23:17:16,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-12 23:17:16,651 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:17:16,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:17:16,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2008762568, now seen corresponding path program 19 times [2024-09-12 23:17:16,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:17:16,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734708567] [2024-09-12 23:17:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:17:16,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:17:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:17:16,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843636610] [2024-09-12 23:17:16,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 23:17:16,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:17:16,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:17:16,669 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:17:16,669 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-12 23:17:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:17:16,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-12 23:17:16,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:17:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3509 backedges. 80 proven. 294 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2024-09-12 23:17:18,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:17:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3509 backedges. 80 proven. 285 refuted. 0 times theorem prover too weak. 3144 trivial. 0 not checked. [2024-09-12 23:17:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:17:24,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734708567] [2024-09-12 23:17:24,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:17:24,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843636610] [2024-09-12 23:17:24,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843636610] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:17:24,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:17:24,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2024-09-12 23:17:24,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827315557] [2024-09-12 23:17:24,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:17:24,627 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-12 23:17:24,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:17:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-12 23:17:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 23:17:24,628 INFO L87 Difference]: Start difference. First operand 762 states and 954 transitions. Second operand has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 26 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (89), 24 states have call predecessors, (89), 24 states have call successors, (89) [2024-09-12 23:18:02,567 WARN L293 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 140 DAG size of output: 156 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 23:18:30,206 WARN L293 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 139 DAG size of output: 148 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 23:18:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:18:31,960 INFO L93 Difference]: Finished difference Result 1309 states and 1855 transitions. [2024-09-12 23:18:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-09-12 23:18:31,961 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 26 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (89), 24 states have call predecessors, (89), 24 states have call successors, (89) Word has length 261 [2024-09-12 23:18:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:18:31,965 INFO L225 Difference]: With dead ends: 1309 [2024-09-12 23:18:31,965 INFO L226 Difference]: Without dead ends: 1303 [2024-09-12 23:18:31,967 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3642 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=2935, Invalid=12565, Unknown=0, NotChecked=0, Total=15500 [2024-09-12 23:18:31,967 INFO L434 NwaCegarLoop]: 120 mSDtfsCounter, 281 mSDsluCounter, 2109 mSDsCounter, 0 mSdLazyCounter, 2899 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 3414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 2899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:18:31,967 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2229 Invalid, 3414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 2899 Invalid, 0 Unknown, 0 Unchecked, 18.2s Time] [2024-09-12 23:18:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2024-09-12 23:18:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1055. [2024-09-12 23:18:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 556 states have (on average 1.1384892086330936) internal successors, (633), 564 states have internal predecessors, (633), 403 states have call successors, (403), 97 states have call predecessors, (403), 95 states have return successors, (401), 393 states have call predecessors, (401), 401 states have call successors, (401) [2024-09-12 23:18:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1437 transitions. [2024-09-12 23:18:34,579 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1437 transitions. Word has length 261 [2024-09-12 23:18:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:18:34,579 INFO L474 AbstractCegarLoop]: Abstraction has 1055 states and 1437 transitions. [2024-09-12 23:18:34,579 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 26 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (89), 24 states have call predecessors, (89), 24 states have call successors, (89) [2024-09-12 23:18:34,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:18:34,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1437 transitions. [2024-09-12 23:18:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-09-12 23:18:34,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:18:34,581 INFO L216 NwaCegarLoop]: trace histogram [41, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:18:34,594 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-12 23:18:34,782 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-12 23:18:34,782 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:18:34,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:18:34,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1245092502, now seen corresponding path program 20 times [2024-09-12 23:18:34,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:18:34,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147785731] [2024-09-12 23:18:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:18:34,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:18:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:18:34,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45679228] [2024-09-12 23:18:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:18:34,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:18:34,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:18:34,800 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:18:34,800 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-12 23:18:34,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:18:34,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:18:34,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-12 23:18:34,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:18:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3509 backedges. 391 proven. 406 refuted. 0 times theorem prover too weak. 2712 trivial. 0 not checked. [2024-09-12 23:18:37,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:18:40,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:18:40,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147785731] [2024-09-12 23:18:40,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:18:40,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45679228] [2024-09-12 23:18:40,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45679228] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:18:40,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:18:40,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-12 23:18:40,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414297751] [2024-09-12 23:18:40,653 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:18:40,653 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 23:18:40,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:18:40,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 23:18:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1140, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 23:18:40,654 INFO L87 Difference]: Start difference. First operand 1055 states and 1437 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 14 states have call predecessors, (45), 14 states have call successors, (45) [2024-09-12 23:18:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:18:45,326 INFO L93 Difference]: Finished difference Result 1180 states and 1605 transitions. [2024-09-12 23:18:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 23:18:45,327 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 14 states have call predecessors, (45), 14 states have call successors, (45) Word has length 261 [2024-09-12 23:18:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:18:45,331 INFO L225 Difference]: With dead ends: 1180 [2024-09-12 23:18:45,331 INFO L226 Difference]: Without dead ends: 1175 [2024-09-12 23:18:45,331 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 344 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=366, Invalid=1614, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 23:18:45,332 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 45 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-12 23:18:45,332 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1274 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-12 23:18:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2024-09-12 23:18:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1167. [2024-09-12 23:18:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 614 states have (on average 1.1400651465798046) internal successors, (700), 622 states have internal predecessors, (700), 447 states have call successors, (447), 107 states have call predecessors, (447), 105 states have return successors, (445), 437 states have call predecessors, (445), 445 states have call successors, (445) [2024-09-12 23:18:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1592 transitions. [2024-09-12 23:18:48,269 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1592 transitions. Word has length 261 [2024-09-12 23:18:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:18:48,269 INFO L474 AbstractCegarLoop]: Abstraction has 1167 states and 1592 transitions. [2024-09-12 23:18:48,270 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 14 states have call predecessors, (45), 14 states have call successors, (45) [2024-09-12 23:18:48,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:18:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1592 transitions. [2024-09-12 23:18:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2024-09-12 23:18:48,272 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:18:48,272 INFO L216 NwaCegarLoop]: trace histogram [41, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:18:48,286 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-09-12 23:18:48,473 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:18:48,473 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:18:48,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:18:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1718565889, now seen corresponding path program 21 times [2024-09-12 23:18:48,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:18:48,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050445250] [2024-09-12 23:18:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:18:48,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:18:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:18:48,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389383512] [2024-09-12 23:18:48,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:18:48,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:18:48,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:18:48,494 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:18:48,495 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-12 23:18:48,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 23:18:48,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:18:48,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 23:18:48,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:18:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3520 backedges. 616 proven. 121 refuted. 0 times theorem prover too weak. 2783 trivial. 0 not checked. [2024-09-12 23:18:50,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:18:52,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:18:52,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050445250] [2024-09-12 23:18:52,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:18:52,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389383512] [2024-09-12 23:18:52,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389383512] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:18:52,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:18:52,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-12 23:18:52,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988103270] [2024-09-12 23:18:52,116 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:18:52,116 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 23:18:52,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:18:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 23:18:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-09-12 23:18:52,117 INFO L87 Difference]: Start difference. First operand 1167 states and 1592 transitions. Second operand has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-12 23:18:56,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:18:59,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:19:08,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 23:19:12,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] Killed by 15