./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.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 a9b967e5 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-scaling/hard-ll_valuebound50.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 a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f --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-a9b967e-m [2024-09-12 16:10:52,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:10:52,358 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:10:52,361 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:10:52,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:10:52,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:10:52,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:10:52,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:10:52,385 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:10:52,386 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:10:52,387 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:10:52,387 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:10:52,387 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:10:52,387 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:10:52,390 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:10:52,390 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:10:52,390 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:10:52,390 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:10:52,391 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:10:52,391 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:10:52,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:10:52,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:10:52,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:10:52,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:10:52,392 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:10:52,392 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:10:52,392 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:10:52,392 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:10:52,392 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:10:52,393 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:10:52,393 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:10:52,393 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:10:52,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:10:52,393 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:10:52,393 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:10:52,394 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:10:52,394 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:10:52,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:10:52,394 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:10:52,394 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:10:52,394 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:10:52,395 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:10:52,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:10:52,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:10:52,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:10:52,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:10:52,668 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:10:52,669 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:10:52,669 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c [2024-09-12 16:10:53,972 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:10:54,118 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:10:54,119 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c [2024-09-12 16:10:54,127 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b2d8a158b/37b9ceae6a394c368c12a214af4b38d6/FLAGfd612709c [2024-09-12 16:10:54,141 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b2d8a158b/37b9ceae6a394c368c12a214af4b38d6 [2024-09-12 16:10:54,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:10:54,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:10:54,147 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:10:54,147 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:10:54,152 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:10:54,152 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b821498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54, skipping insertion in model container [2024-09-12 16:10:54,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,170 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:10:54,286 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-scaling/hard-ll_valuebound50.c[538,551] [2024-09-12 16:10:54,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:10:54,318 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:10:54,327 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-scaling/hard-ll_valuebound50.c[538,551] [2024-09-12 16:10:54,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:10:54,351 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:10:54,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54 WrapperNode [2024-09-12 16:10:54,352 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:10:54,353 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:10:54,354 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:10:54,354 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:10:54,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,369 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:10:54,370 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:10:54,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:10:54,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:10:54,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:10:54,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,383 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,397 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 16:10:54,398 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,398 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,401 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,406 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,408 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,409 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,412 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:10:54,412 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:10:54,414 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:10:54,414 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:10:54,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (1/1) ... [2024-09-12 16:10:54,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:10:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:10:54,445 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 16:10:54,459 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 16:10:54,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:10:54,501 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 16:10:54,501 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 16:10:54,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:10:54,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:10:54,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:10:54,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:10:54,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:10:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:10:54,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:10:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:10:54,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:10:54,556 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:10:54,558 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:10:54,732 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 16:10:54,733 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:10:54,755 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:10:54,755 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 16:10:54,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:10:54 BoogieIcfgContainer [2024-09-12 16:10:54,756 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:10:54,757 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:10:54,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:10:54,760 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:10:54,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:10:54" (1/3) ... [2024-09-12 16:10:54,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ea0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:10:54, skipping insertion in model container [2024-09-12 16:10:54,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:10:54" (2/3) ... [2024-09-12 16:10:54,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ea0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:10:54, skipping insertion in model container [2024-09-12 16:10:54,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:10:54" (3/3) ... [2024-09-12 16:10:54,763 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.c [2024-09-12 16:10:54,775 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:10:54,775 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:10:54,822 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:10:54,828 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;@38be74f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:10:54,829 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:10:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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 16:10:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 16:10:54,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:10:54,840 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:10:54,840 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:10:54,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-12 16:10:54,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:10:54,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224081871] [2024-09-12 16:10:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:10:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:54,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:10:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:54,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:10:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:54,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:10:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:54,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:10:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:10:54,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:10:54,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224081871] [2024-09-12 16:10:54,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224081871] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:10:54,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:10:54,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 16:10:54,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993015310] [2024-09-12 16:10:54,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:10:54,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 16:10:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:10:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 16:10:55,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 16:10:55,004 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 16:10:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:10:55,024 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-12 16:10:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 16:10:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-12 16:10:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:10:55,031 INFO L225 Difference]: With dead ends: 66 [2024-09-12 16:10:55,031 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 16:10:55,034 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 16:10:55,036 INFO L434 NwaCegarLoop]: 44 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, 44 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 16:10:55,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:10:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 16:10:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 16:10:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 16:10:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-12 16:10:55,063 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-12 16:10:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:10:55,063 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-12 16:10:55,064 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 16:10:55,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-12 16:10:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 16:10:55,065 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:10:55,065 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:10:55,066 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:10:55,066 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:10:55,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:55,066 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-12 16:10:55,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:10:55,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158230886] [2024-09-12 16:10:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:55,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:10:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:10:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:10:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:10:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:10:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:10:55,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:10:55,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158230886] [2024-09-12 16:10:55,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158230886] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:10:55,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:10:55,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:10:55,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655239229] [2024-09-12 16:10:55,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:10:55,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:10:55,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:10:55,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:10:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:10:55,265 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-12 16:10:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:10:55,308 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-12 16:10:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:10:55,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-12 16:10:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:10:55,309 INFO L225 Difference]: With dead ends: 45 [2024-09-12 16:10:55,309 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 16:10:55,310 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 16:10:55,310 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:10:55,311 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:10:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 16:10:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-12 16:10:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 16:10:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-12 16:10:55,319 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-12 16:10:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:10:55,319 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-12 16:10:55,319 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-12 16:10:55,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-12 16:10:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 16:10:55,320 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:10:55,320 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 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 16:10:55,321 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 16:10:55,321 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:10:55,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-12 16:10:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:10:55,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528047720] [2024-09-12 16:10:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:55,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:10:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:10:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:10:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:10:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:10:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:10:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:10:55,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:10:55,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528047720] [2024-09-12 16:10:55,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528047720] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:10:55,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:10:55,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:10:55,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587107104] [2024-09-12 16:10:55,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:10:55,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:10:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:10:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:10:55,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:10:55,414 INFO L87 Difference]: Start difference. First operand 36 states and 45 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, (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 16:10:55,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:10:55,465 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-12 16:10:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:10:55,465 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, (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 16:10:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:10:55,466 INFO L225 Difference]: With dead ends: 49 [2024-09-12 16:10:55,466 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 16:10:55,467 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 16:10:55,467 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:10:55,468 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:10:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 16:10:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-12 16:10:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 16:10:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-12 16:10:55,487 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-12 16:10:55,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:10:55,488 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-12 16:10:55,488 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, (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 16:10:55,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:55,488 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-12 16:10:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 16:10:55,489 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:10:55,489 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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 16:10:55,489 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 16:10:55,490 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:10:55,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-12 16:10:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:10:55,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134027632] [2024-09-12 16:10:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:55,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:10:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:10:55,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596769241] [2024-09-12 16:10:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:55,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:10:55,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:10:55,509 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 16:10:55,511 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 16:10:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:55,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 16:10:55,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:10:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 16:10:55,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 16:10:55,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:10:55,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134027632] [2024-09-12 16:10:55,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:10:55,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596769241] [2024-09-12 16:10:55,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596769241] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:10:55,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:10:55,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:10:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625769198] [2024-09-12 16:10:55,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:10:55,655 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:10:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:10:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:10:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:10:55,656 INFO L87 Difference]: Start difference. First operand 40 states and 48 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 16:10:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:10:55,717 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-12 16:10:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:10:55,717 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 16:10:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:10:55,718 INFO L225 Difference]: With dead ends: 66 [2024-09-12 16:10:55,718 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 16:10:55,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 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 16:10:55,719 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:10:55,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:10:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 16:10:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-12 16:10:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 16:10:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-12 16:10:55,739 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-12 16:10:55,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:10:55,740 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-12 16:10:55,740 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 16:10:55,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-12 16:10:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 16:10:55,741 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:10:55,741 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2024-09-12 16:10:55,755 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:10:55,945 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:10:55,946 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:10:55,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-12 16:10:55,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:10:55,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341868530] [2024-09-12 16:10:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:10:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:10:55,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844311057] [2024-09-12 16:10:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:55,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:10:55,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:10:55,963 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 16:10:55,964 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 16:10:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:56,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-12 16:10:56,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:10:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 16:10:56,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:10:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 16:10:56,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:10:56,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341868530] [2024-09-12 16:10:56,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:10:56,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844311057] [2024-09-12 16:10:56,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844311057] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:10:56,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:10:56,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-12 16:10:56,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019319301] [2024-09-12 16:10:56,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:10:56,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 16:10:56,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:10:56,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 16:10:56,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-12 16:10:56,237 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-12 16:10:56,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:10:56,317 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-09-12 16:10:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:10:56,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2024-09-12 16:10:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:10:56,320 INFO L225 Difference]: With dead ends: 68 [2024-09-12 16:10:56,320 INFO L226 Difference]: Without dead ends: 66 [2024-09-12 16:10:56,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:10:56,321 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:10:56,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:10:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-12 16:10:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-12 16:10:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 16:10:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-09-12 16:10:56,332 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 44 [2024-09-12 16:10:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:10:56,332 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-09-12 16:10:56,333 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-12 16:10:56,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-09-12 16:10:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 16:10:56,334 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:10:56,334 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:10:56,347 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 16:10:56,534 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:10:56,535 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:10:56,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-12 16:10:56,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:10:56,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704159154] [2024-09-12 16:10:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:56,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:10:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:10:56,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444840097] [2024-09-12 16:10:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:56,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:10:56,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:10:56,561 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 16:10:56,565 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 16:10:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:56,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 16:10:56,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:10:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-12 16:10:56,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:10:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 16:10:56,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:10:56,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704159154] [2024-09-12 16:10:56,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:10:56,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444840097] [2024-09-12 16:10:56,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444840097] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:10:56,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:10:56,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-12 16:10:56,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799121369] [2024-09-12 16:10:56,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:10:56,840 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:10:56,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:10:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:10:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 16:10:56,840 INFO L87 Difference]: Start difference. First operand 63 states and 80 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-12 16:10:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:10:56,933 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2024-09-12 16:10:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:10:56,935 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2024-09-12 16:10:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:10:56,935 INFO L225 Difference]: With dead ends: 73 [2024-09-12 16:10:56,936 INFO L226 Difference]: Without dead ends: 71 [2024-09-12 16:10:56,936 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:10:56,936 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 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 16:10:56,937 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:10:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-12 16:10:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-12 16:10:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 16:10:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-09-12 16:10:56,958 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 54 [2024-09-12 16:10:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:10:56,958 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-09-12 16:10:56,958 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-12 16:10:56,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-09-12 16:10:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 16:10:56,959 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:10:56,959 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1] [2024-09-12 16:10:56,974 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 16:10:57,163 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 16:10:57,164 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:10:57,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash 515743006, now seen corresponding path program 1 times [2024-09-12 16:10:57,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:10:57,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500125881] [2024-09-12 16:10:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:57,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:10:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:10:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:10:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:10:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:10:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:10:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 16:10:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 16:10:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 16:10:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 16:10:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 16:10:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 16:10:57,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:10:57,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500125881] [2024-09-12 16:10:57,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500125881] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:10:57,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:10:57,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:10:57,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157865053] [2024-09-12 16:10:57,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:10:57,304 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:10:57,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:10:57,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:10:57,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:10:57,305 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-12 16:10:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:10:57,361 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-09-12 16:10:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:10:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-09-12 16:10:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:10:57,362 INFO L225 Difference]: With dead ends: 78 [2024-09-12 16:10:57,362 INFO L226 Difference]: Without dead ends: 66 [2024-09-12 16:10:57,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 16:10:57,363 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:10:57,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:10:57,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-12 16:10:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-12 16:10:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 16:10:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-09-12 16:10:57,375 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 60 [2024-09-12 16:10:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:10:57,375 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-09-12 16:10:57,375 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-12 16:10:57,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-09-12 16:10:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-12 16:10:57,376 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:10:57,377 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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 16:10:57,377 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-12 16:10:57,377 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:10:57,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:10:57,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-12 16:10:57,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:10:57,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682259835] [2024-09-12 16:10:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:57,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:10:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:10:57,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875184318] [2024-09-12 16:10:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:10:57,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:10:57,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:10:57,399 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 16:10:57,400 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 16:10:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:10:57,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 16:10:57,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:10:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-12 16:10:57,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:10:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-12 16:10:59,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:10:59,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682259835] [2024-09-12 16:10:59,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:10:59,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875184318] [2024-09-12 16:10:59,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875184318] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:10:59,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:10:59,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-12 16:10:59,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389991995] [2024-09-12 16:10:59,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:10:59,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 16:10:59,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:10:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 16:10:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-12 16:10:59,151 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-12 16:11:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:00,088 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2024-09-12 16:11:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 16:11:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 74 [2024-09-12 16:11:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:00,091 INFO L225 Difference]: With dead ends: 153 [2024-09-12 16:11:00,091 INFO L226 Difference]: Without dead ends: 130 [2024-09-12 16:11:00,091 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-09-12 16:11:00,092 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:00,092 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 256 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 16:11:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-12 16:11:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2024-09-12 16:11:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-12 16:11:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2024-09-12 16:11:00,137 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 74 [2024-09-12 16:11:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:00,137 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2024-09-12 16:11:00,137 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-12 16:11:00,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2024-09-12 16:11:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-12 16:11:00,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:00,139 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 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] [2024-09-12 16:11:00,152 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 16:11:00,342 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:00,343 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:00,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:00,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1571705391, now seen corresponding path program 1 times [2024-09-12 16:11:00,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:00,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46976372] [2024-09-12 16:11:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:00,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:11:00,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593638026] [2024-09-12 16:11:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:00,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:00,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:00,377 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 16:11:00,379 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 16:11:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:00,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 16:11:00,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-12 16:11:00,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-12 16:11:01,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:01,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46976372] [2024-09-12 16:11:01,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:11:01,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593638026] [2024-09-12 16:11:01,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593638026] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:11:01,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:11:01,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-12 16:11:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144365561] [2024-09-12 16:11:01,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:11:01,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 16:11:01,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 16:11:01,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-12 16:11:01,234 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-12 16:11:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:01,605 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2024-09-12 16:11:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 16:11:01,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2024-09-12 16:11:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:01,609 INFO L225 Difference]: With dead ends: 145 [2024-09-12 16:11:01,609 INFO L226 Difference]: Without dead ends: 111 [2024-09-12 16:11:01,610 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-12 16:11:01,610 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:01,610 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 414 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:11:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-12 16:11:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2024-09-12 16:11:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-12 16:11:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-09-12 16:11:01,654 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 85 [2024-09-12 16:11:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:01,655 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-09-12 16:11:01,655 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-12 16:11:01,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-09-12 16:11:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-12 16:11:01,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:01,658 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 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] [2024-09-12 16:11:01,673 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 16:11:01,858 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:01,859 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:01,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:01,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1973508941, now seen corresponding path program 2 times [2024-09-12 16:11:01,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:01,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495691997] [2024-09-12 16:11:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:01,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:11:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:11:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:11:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:11:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:11:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 16:11:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 16:11:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 16:11:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 16:11:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 16:11:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 16:11:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 16:11:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 16:11:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 16:11:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-12 16:11:02,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:02,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495691997] [2024-09-12 16:11:02,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495691997] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:11:02,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083853685] [2024-09-12 16:11:02,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:11:02,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:02,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:02,100 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 16:11:02,104 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 16:11:02,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:11:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:11:02,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 16:11:02,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-12 16:11:02,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-12 16:11:02,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083853685] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:11:02,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:11:02,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-12 16:11:02,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472679423] [2024-09-12 16:11:02,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:11:02,245 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:11:02,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:02,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:11:02,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:11:02,246 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-12 16:11:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:02,307 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2024-09-12 16:11:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 16:11:02,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 87 [2024-09-12 16:11:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:02,308 INFO L225 Difference]: With dead ends: 124 [2024-09-12 16:11:02,308 INFO L226 Difference]: Without dead ends: 102 [2024-09-12 16:11:02,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:11:02,309 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:02,310 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:11:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-12 16:11:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-09-12 16:11:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-12 16:11:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2024-09-12 16:11:02,335 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 87 [2024-09-12 16:11:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:02,336 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2024-09-12 16:11:02,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-12 16:11:02,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2024-09-12 16:11:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-12 16:11:02,337 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:02,337 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 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, 1] [2024-09-12 16:11:02,349 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 16:11:02,537 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 16:11:02,538 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:02,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash -637517709, now seen corresponding path program 1 times [2024-09-12 16:11:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:02,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732299095] [2024-09-12 16:11:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:02,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:11:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:11:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:11:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:11:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:11:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 16:11:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 16:11:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 16:11:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 16:11:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 16:11:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 16:11:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 16:11:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 16:11:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 16:11:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 16:11:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-12 16:11:02,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:02,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732299095] [2024-09-12 16:11:02,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732299095] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:11:02,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492486536] [2024-09-12 16:11:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:02,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:02,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:02,744 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 16:11:02,745 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 16:11:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:02,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-12 16:11:02,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-12 16:11:03,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-12 16:11:03,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492486536] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:11:03,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:11:03,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-12 16:11:03,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985353217] [2024-09-12 16:11:03,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:11:03,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 16:11:03,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:03,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 16:11:03,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-12 16:11:03,324 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-12 16:11:03,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:03,566 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2024-09-12 16:11:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 16:11:03,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 90 [2024-09-12 16:11:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:03,568 INFO L225 Difference]: With dead ends: 117 [2024-09-12 16:11:03,568 INFO L226 Difference]: Without dead ends: 100 [2024-09-12 16:11:03,569 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-12 16:11:03,569 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:03,569 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 384 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:11:03,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-12 16:11:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-09-12 16:11:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-12 16:11:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-12 16:11:03,592 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 90 [2024-09-12 16:11:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:03,592 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-12 16:11:03,592 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-12 16:11:03,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-12 16:11:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-12 16:11:03,593 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:03,593 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-12 16:11:03,605 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 16:11:03,797 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:03,798 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:03,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:03,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1204328542, now seen corresponding path program 1 times [2024-09-12 16:11:03,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:03,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529153516] [2024-09-12 16:11:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:03,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:11:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:11:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:11:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:11:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:11:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 16:11:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 16:11:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 16:11:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 16:11:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 16:11:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 16:11:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 16:11:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 16:11:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 16:11:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 16:11:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 16:11:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-12 16:11:03,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:03,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529153516] [2024-09-12 16:11:03,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529153516] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:11:03,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411695637] [2024-09-12 16:11:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:03,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:03,881 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 16:11:03,881 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 16:11:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:03,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 16:11:03,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-09-12 16:11:03,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 16:11:03,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411695637] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:11:03,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:11:03,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-12 16:11:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161753814] [2024-09-12 16:11:03,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:11:03,948 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:11:03,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:03,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:11:03,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-12 16:11:03,949 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-12 16:11:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:04,002 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-09-12 16:11:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:11:04,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 94 [2024-09-12 16:11:04,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:04,003 INFO L225 Difference]: With dead ends: 100 [2024-09-12 16:11:04,003 INFO L226 Difference]: Without dead ends: 88 [2024-09-12 16:11:04,003 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-12 16:11:04,004 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:04,004 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:11:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-12 16:11:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-12 16:11:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 16:11:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-09-12 16:11:04,023 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 94 [2024-09-12 16:11:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:04,023 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-09-12 16:11:04,024 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-12 16:11:04,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-09-12 16:11:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 16:11:04,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:04,025 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:04,037 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 16:11:04,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:04,226 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:04,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash -588826413, now seen corresponding path program 3 times [2024-09-12 16:11:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:04,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33499196] [2024-09-12 16:11:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:11:04,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881807265] [2024-09-12 16:11:04,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:11:04,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:04,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:04,272 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 16:11:04,273 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 16:11:05,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 16:11:05,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:11:05,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 16:11:05,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-12 16:11:05,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-12 16:11:16,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:16,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33499196] [2024-09-12 16:11:16,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:11:16,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881807265] [2024-09-12 16:11:16,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881807265] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:11:16,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:11:16,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-09-12 16:11:16,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860362163] [2024-09-12 16:11:16,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:11:16,568 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 16:11:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 16:11:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-09-12 16:11:16,569 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-12 16:11:22,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:11:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:23,307 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2024-09-12 16:11:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 16:11:23,308 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 104 [2024-09-12 16:11:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:23,309 INFO L225 Difference]: With dead ends: 162 [2024-09-12 16:11:23,312 INFO L226 Difference]: Without dead ends: 140 [2024-09-12 16:11:23,313 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2024-09-12 16:11:23,313 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 52 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:23,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 433 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-12 16:11:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-12 16:11:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2024-09-12 16:11:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 75 states have (on average 1.12) internal successors, (84), 79 states have internal predecessors, (84), 38 states have call successors, (38), 15 states have call predecessors, (38), 14 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-12 16:11:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2024-09-12 16:11:23,359 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 104 [2024-09-12 16:11:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:23,359 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2024-09-12 16:11:23,359 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-12 16:11:23,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2024-09-12 16:11:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-12 16:11:23,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:23,361 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 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] [2024-09-12 16:11:23,372 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 16:11:23,565 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 16:11:23,566 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:23,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:23,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1973122394, now seen corresponding path program 2 times [2024-09-12 16:11:23,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:23,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924142145] [2024-09-12 16:11:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:23,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:11:23,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280098828] [2024-09-12 16:11:23,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:11:23,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:23,614 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 16:11:23,618 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 16:11:23,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:11:23,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:11:23,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 16:11:23,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2024-09-12 16:11:23,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-12 16:11:23,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:23,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924142145] [2024-09-12 16:11:23,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:11:23,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280098828] [2024-09-12 16:11:23,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280098828] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:11:23,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:11:23,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-09-12 16:11:23,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340333844] [2024-09-12 16:11:23,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:11:23,937 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 16:11:23,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:23,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 16:11:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-12 16:11:23,938 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-12 16:11:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:24,394 INFO L93 Difference]: Finished difference Result 142 states and 169 transitions. [2024-09-12 16:11:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 16:11:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 115 [2024-09-12 16:11:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:24,396 INFO L225 Difference]: With dead ends: 142 [2024-09-12 16:11:24,396 INFO L226 Difference]: Without dead ends: 140 [2024-09-12 16:11:24,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-12 16:11:24,397 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:24,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 216 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:11:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-12 16:11:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-09-12 16:11:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 88 states have internal predecessors, (93), 38 states have call successors, (38), 18 states have call predecessors, (38), 17 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-12 16:11:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2024-09-12 16:11:24,439 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 115 [2024-09-12 16:11:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:24,439 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2024-09-12 16:11:24,439 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-12 16:11:24,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2024-09-12 16:11:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-12 16:11:24,440 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:24,440 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:24,454 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 16:11:24,641 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 16:11:24,641 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:24,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1536141598, now seen corresponding path program 4 times [2024-09-12 16:11:24,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:24,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983842432] [2024-09-12 16:11:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:24,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:11:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:11:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:11:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:11:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:11:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 16:11:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 16:11:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 16:11:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 16:11:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 16:11:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 16:11:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 16:11:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 16:11:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 16:11:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 16:11:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 16:11:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-12 16:11:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-12 16:11:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-12 16:11:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-12 16:11:24,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:24,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983842432] [2024-09-12 16:11:24,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983842432] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:11:24,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847031638] [2024-09-12 16:11:24,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:11:24,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:24,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:24,876 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 16:11:24,877 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 16:11:24,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:11:24,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:11:24,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 16:11:24,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-12 16:11:24,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-12 16:11:25,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847031638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:11:25,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:11:25,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-12 16:11:25,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381477329] [2024-09-12 16:11:25,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:11:25,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 16:11:25,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 16:11:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 16:11:25,074 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-12 16:11:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:25,176 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2024-09-12 16:11:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:11:25,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 117 [2024-09-12 16:11:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:25,177 INFO L225 Difference]: With dead ends: 167 [2024-09-12 16:11:25,177 INFO L226 Difference]: Without dead ends: 144 [2024-09-12 16:11:25,178 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 16:11:25,178 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:25,178 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 273 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:11:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-12 16:11:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2024-09-12 16:11:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 90 states have internal predecessors, (94), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-12 16:11:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2024-09-12 16:11:25,219 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 117 [2024-09-12 16:11:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:25,220 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2024-09-12 16:11:25,220 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-12 16:11:25,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2024-09-12 16:11:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 16:11:25,221 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:25,221 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 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] [2024-09-12 16:11:25,233 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 16:11:25,425 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 16:11:25,426 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:25,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 47128766, now seen corresponding path program 2 times [2024-09-12 16:11:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:25,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413335386] [2024-09-12 16:11:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:25,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:11:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:11:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 16:11:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 16:11:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:11:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 16:11:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 16:11:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 16:11:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 16:11:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 16:11:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 16:11:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 16:11:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 16:11:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 16:11:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 16:11:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 16:11:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-12 16:11:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-12 16:11:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-12 16:11:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 16:11:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:11:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-09-12 16:11:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:11:25,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413335386] [2024-09-12 16:11:25,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413335386] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:11:25,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052246252] [2024-09-12 16:11:25,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:11:25,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:25,750 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 16:11:25,752 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 16:11:25,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:11:25,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:11:25,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-12 16:11:25,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-12 16:11:26,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-12 16:11:27,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052246252] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:11:27,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:11:27,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-09-12 16:11:27,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004796035] [2024-09-12 16:11:27,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:11:27,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 16:11:27,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:11:27,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 16:11:27,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-12 16:11:27,046 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-12 16:11:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:11:27,672 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2024-09-12 16:11:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:11:27,673 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) Word has length 120 [2024-09-12 16:11:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:11:27,674 INFO L225 Difference]: With dead ends: 158 [2024-09-12 16:11:27,675 INFO L226 Difference]: Without dead ends: 130 [2024-09-12 16:11:27,675 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 16:11:27,676 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 23 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 16:11:27,677 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 530 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 16:11:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-12 16:11:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2024-09-12 16:11:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 16:11:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2024-09-12 16:11:27,710 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 120 [2024-09-12 16:11:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:11:27,710 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2024-09-12 16:11:27,710 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-12 16:11:27,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2024-09-12 16:11:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-12 16:11:27,711 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:11:27,711 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:11:27,724 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 16:11:27,915 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 16:11:27,915 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:11:27,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:11:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1414642200, now seen corresponding path program 5 times [2024-09-12 16:11:27,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:11:27,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655913211] [2024-09-12 16:11:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:11:27,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:11:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:11:27,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910839115] [2024-09-12 16:11:27,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 16:11:27,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:11:27,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:11:27,951 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 16:11:27,956 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 16:11:28,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-12 16:11:28,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:11:28,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-12 16:11:28,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:11:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 82 proven. 101 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-09-12 16:11:28,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:11:46,949 WARN L293 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 115 DAG size of output: 111 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:13:09,634 WARN L293 SmtUtils]: Spent 7.51s on a formula simplification that was a NOOP. DAG size: 236 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:14:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 82 proven. 101 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-09-12 16:14:05,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:14:05,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655913211] [2024-09-12 16:14:05,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:14:05,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910839115] [2024-09-12 16:14:05,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910839115] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:14:05,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:14:05,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2024-09-12 16:14:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777634017] [2024-09-12 16:14:05,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:14:05,243 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 16:14:05,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:14:05,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 16:14:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=805, Unknown=1, NotChecked=0, Total=992 [2024-09-12 16:14:05,245 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 29 states have internal predecessors, (57), 19 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (40), 15 states have call predecessors, (40), 17 states have call successors, (40) [2024-09-12 16:14:30,418 WARN L293 SmtUtils]: Spent 23.71s on a formula simplification. DAG size of input: 453 DAG size of output: 77 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:14:36,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:14:38,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:14:42,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:14:44,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:14:46,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:15:16,722 WARN L293 SmtUtils]: Spent 22.27s on a formula simplification. DAG size of input: 416 DAG size of output: 77 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:15:19,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:15:23,415 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 []