./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i --full-output --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/divbin_valuebound2.i -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 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 --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 [2024-09-11 19:49:52,234 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:49:52,298 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:49:52,303 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:49:52,305 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:49:52,328 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:49:52,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:49:52,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:49:52,330 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:49:52,330 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:49:52,330 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:49:52,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:49:52,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:49:52,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:49:52,332 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:49:52,332 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:49:52,333 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:49:52,333 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:49:52,333 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:49:52,334 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:49:52,334 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:49:52,335 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:49:52,335 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:49:52,335 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:49:52,336 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:49:52,336 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:49:52,336 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:49:52,336 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:49:52,337 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:49:52,337 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:49:52,337 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:49:52,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:49:52,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:49:52,342 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:49:52,343 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:49:52,343 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:49:52,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:49:52,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:49:52,344 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:49:52,347 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:49:52,347 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:49:52,348 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:49:52,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:49:52,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:49:52,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:49:52,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:49:52,623 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:49:52,624 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:49:52,625 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2024-09-11 19:49:53,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:49:54,137 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:49:54,137 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2024-09-11 19:49:54,144 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/18ce5e0d8/a329568aa0534c6480c893dac7ce16b5/FLAG7f06c4d16 [2024-09-11 19:49:54,525 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/18ce5e0d8/a329568aa0534c6480c893dac7ce16b5 [2024-09-11 19:49:54,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:49:54,528 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:49:54,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:49:54,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:49:54,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:49:54,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703b596f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54, skipping insertion in model container [2024-09-11 19:49:54,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,560 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:49:54,704 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/divbin_valuebound2.i[950,963] [2024-09-11 19:49:54,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:49:54,730 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:49:54,742 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/divbin_valuebound2.i[950,963] [2024-09-11 19:49:54,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:49:54,764 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:49:54,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54 WrapperNode [2024-09-11 19:49:54,764 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:49:54,765 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:49:54,765 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:49:54,765 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:49:54,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,777 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,789 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2024-09-11 19:49:54,790 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:49:54,791 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:49:54,791 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:49:54,791 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:49:54,799 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,800 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,809 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]. [2024-09-11 19:49:54,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,815 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,819 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:49:54,820 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:49:54,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:49:54,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:49:54,822 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (1/1) ... [2024-09-11 19:49:54,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:49:54,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:49:54,859 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) [2024-09-11 19:49:54,865 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 [2024-09-11 19:49:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:49:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 19:49:54,912 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 19:49:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:49:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:49:54,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:49:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:49:54,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:49:54,977 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:49:54,980 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:49:55,188 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-11 19:49:55,192 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:49:55,224 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:49:55,224 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 19:49:55,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:49:55 BoogieIcfgContainer [2024-09-11 19:49:55,224 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:49:55,226 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:49:55,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:49:55,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:49:55,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:49:54" (1/3) ... [2024-09-11 19:49:55,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d6af17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:49:55, skipping insertion in model container [2024-09-11 19:49:55,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:49:54" (2/3) ... [2024-09-11 19:49:55,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d6af17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:49:55, skipping insertion in model container [2024-09-11 19:49:55,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:49:55" (3/3) ... [2024-09-11 19:49:55,235 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.i [2024-09-11 19:49:55,252 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:49:55,253 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:49:55,314 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:49:55,320 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;@557f69f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:49:55,320 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:49:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:49:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-11 19:49:55,333 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:49:55,334 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:49:55,334 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:49:55,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:49:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1335240993, now seen corresponding path program 1 times [2024-09-11 19:49:55,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:49:55,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885862534] [2024-09-11 19:49:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:49:55,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:49:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:49:55,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:49:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:49:55,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:49:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:49:55,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:49:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:49:55,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:49:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:49:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:49:55,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:49:55,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885862534] [2024-09-11 19:49:55,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885862534] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:49:55,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:49:55,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:49:55,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109814474] [2024-09-11 19:49:55,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:49:55,551 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:49:55,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:49:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:49:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:49:55,575 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:49:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:49:55,605 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2024-09-11 19:49:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:49:55,607 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-09-11 19:49:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:49:55,614 INFO L225 Difference]: With dead ends: 50 [2024-09-11 19:49:55,614 INFO L226 Difference]: Without dead ends: 24 [2024-09-11 19:49:55,617 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:49:55,623 INFO L434 NwaCegarLoop]: 30 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, 30 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 [2024-09-11 19:49:55,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:49:55,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-11 19:49:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-11 19:49:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 19:49:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-09-11 19:49:55,654 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2024-09-11 19:49:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:49:55,655 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-09-11 19:49:55,655 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:49:55,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:49:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-09-11 19:49:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-11 19:49:55,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:49:55,657 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:49:55,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:49:55,658 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:49:55,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:49:55,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1249624970, now seen corresponding path program 1 times [2024-09-11 19:49:55,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:49:55,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28275612] [2024-09-11 19:49:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:49:55,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:49:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:49:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510082860] [2024-09-11 19:49:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:49:55,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:49:55,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:49:55,712 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) [2024-09-11 19:49:55,713 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:49:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:49:55,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:49:55,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:49:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:49:56,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:49:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:49:56,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:49:56,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28275612] [2024-09-11 19:49:56,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:49:56,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510082860] [2024-09-11 19:49:56,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510082860] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 19:49:56,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:49:56,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2024-09-11 19:49:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088236088] [2024-09-11 19:49:56,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:49:56,185 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:49:56,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:49:56,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:49:56,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:49:56,188 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 19:50:00,255 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 [1] [2024-09-11 19:50:04,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-09-11 19:50:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:50:04,294 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2024-09-11 19:50:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:50:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-09-11 19:50:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:50:04,296 INFO L225 Difference]: With dead ends: 34 [2024-09-11 19:50:04,296 INFO L226 Difference]: Without dead ends: 32 [2024-09-11 19:50:04,297 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:50:04,298 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:50:04,301 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 87 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2024-09-11 19:50:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-11 19:50:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-11 19:50:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:50:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-09-11 19:50:04,312 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 30 [2024-09-11 19:50:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:50:04,313 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-09-11 19:50:04,313 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 19:50:04,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-09-11 19:50:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 19:50:04,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:50:04,315 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:50:04,331 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:50:04,516 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:50:04,516 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:50:04,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:04,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1015287574, now seen corresponding path program 1 times [2024-09-11 19:50:04,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:50:04,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502797801] [2024-09-11 19:50:04,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:50:04,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:50:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:04,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:50:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:04,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:50:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:04,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:50:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:04,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:50:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:04,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 19:50:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:50:04,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:50:04,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502797801] [2024-09-11 19:50:04,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502797801] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:50:04,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468869555] [2024-09-11 19:50:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:50:04,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:50:04,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:50:04,929 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) [2024-09-11 19:50:04,931 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:50:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:04,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:50:04,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:50:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:50:05,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:50:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:50:05,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468869555] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:50:05,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:50:05,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 9 [2024-09-11 19:50:05,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681232534] [2024-09-11 19:50:05,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:50:05,241 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:50:05,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:50:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:50:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:50:05,242 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-11 19:50:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:50:05,394 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2024-09-11 19:50:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:50:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-11 19:50:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:50:05,397 INFO L225 Difference]: With dead ends: 44 [2024-09-11 19:50:05,397 INFO L226 Difference]: Without dead ends: 37 [2024-09-11 19:50:05,397 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:50:05,400 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:50:05,401 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 98 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:50:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-11 19:50:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2024-09-11 19:50:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:50:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-09-11 19:50:05,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 36 [2024-09-11 19:50:05,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:50:05,419 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-09-11 19:50:05,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-11 19:50:05,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-09-11 19:50:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-11 19:50:05,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:50:05,421 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:50:05,440 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 19:50:05,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:50:05,623 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:50:05,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:05,624 INFO L85 PathProgramCache]: Analyzing trace with hash -158878427, now seen corresponding path program 1 times [2024-09-11 19:50:05,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:50:05,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427006614] [2024-09-11 19:50:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:50:05,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:50:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:06,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:50:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:06,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:50:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:06,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:50:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:06,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:50:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:06,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 19:50:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:50:06,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:50:06,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427006614] [2024-09-11 19:50:06,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427006614] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:50:06,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:50:06,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-11 19:50:06,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064096753] [2024-09-11 19:50:06,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:50:06,047 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:50:06,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:50:06,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:50:06,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:50:06,048 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:50:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:50:06,095 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-09-11 19:50:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 19:50:06,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-11 19:50:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:50:06,097 INFO L225 Difference]: With dead ends: 44 [2024-09-11 19:50:06,098 INFO L226 Difference]: Without dead ends: 31 [2024-09-11 19:50:06,099 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:50:06,100 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:50:06,101 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:50:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-11 19:50:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-11 19:50:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:50:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-09-11 19:50:06,119 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 38 [2024-09-11 19:50:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:50:06,120 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-09-11 19:50:06,120 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:50:06,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-09-11 19:50:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 19:50:06,121 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:50:06,121 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:50:06,121 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-11 19:50:06,122 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:50:06,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:06,122 INFO L85 PathProgramCache]: Analyzing trace with hash 599091488, now seen corresponding path program 1 times [2024-09-11 19:50:06,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:50:06,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737922002] [2024-09-11 19:50:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:50:06,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:50:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:50:06,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590232190] [2024-09-11 19:50:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:50:06,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:50:06,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:50:06,161 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) [2024-09-11 19:50:06,162 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:50:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:06,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-11 19:50:06,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:50:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-11 19:50:06,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:50:24,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:50:24,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737922002] [2024-09-11 19:50:24,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:50:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590232190] [2024-09-11 19:50:24,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590232190] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:50:24,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:50:24,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-11 19:50:24,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116597398] [2024-09-11 19:50:24,930 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:50:24,930 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:50:24,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:50:24,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:50:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=171, Unknown=4, NotChecked=0, Total=210 [2024-09-11 19:50:24,931 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-11 19:50:25,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:50:25,118 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2024-09-11 19:50:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 19:50:25,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-09-11 19:50:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:50:25,122 INFO L225 Difference]: With dead ends: 44 [2024-09-11 19:50:25,123 INFO L226 Difference]: Without dead ends: 42 [2024-09-11 19:50:25,123 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=41, Invalid=195, Unknown=4, NotChecked=0, Total=240 [2024-09-11 19:50:25,124 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:50:25,124 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:50:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-11 19:50:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-09-11 19:50:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-11 19:50:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-09-11 19:50:25,146 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 40 [2024-09-11 19:50:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:50:25,146 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-09-11 19:50:25,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-11 19:50:25,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-09-11 19:50:25,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-11 19:50:25,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:50:25,147 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:50:25,156 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 19:50:25,353 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:50:25,354 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:50:25,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2107284293, now seen corresponding path program 2 times [2024-09-11 19:50:25,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:50:25,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748208769] [2024-09-11 19:50:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:50:25,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:50:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:25,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:50:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:25,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:50:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:25,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:50:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:25,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:50:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:25,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:50:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:25,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 19:50:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 19:50:25,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:50:25,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748208769] [2024-09-11 19:50:25,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748208769] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:50:25,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615381194] [2024-09-11 19:50:25,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:50:25,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:50:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:50:25,815 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) [2024-09-11 19:50:25,817 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:50:25,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:50:25,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:50:25,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-11 19:50:25,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:50:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 19:50:26,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:50:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 19:50:26,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615381194] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:50:26,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:50:26,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 21 [2024-09-11 19:50:26,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282053729] [2024-09-11 19:50:26,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:50:26,966 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:50:26,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:50:26,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:50:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:50:26,969 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-11 19:50:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:50:27,800 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2024-09-11 19:50:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 19:50:27,801 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) Word has length 48 [2024-09-11 19:50:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:50:27,802 INFO L225 Difference]: With dead ends: 89 [2024-09-11 19:50:27,802 INFO L226 Difference]: Without dead ends: 59 [2024-09-11 19:50:27,803 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2024-09-11 19:50:27,803 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:50:27,804 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 177 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:50:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-11 19:50:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-09-11 19:50:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-11 19:50:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-09-11 19:50:27,833 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 48 [2024-09-11 19:50:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:50:27,833 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-09-11 19:50:27,833 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-11 19:50:27,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-09-11 19:50:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-11 19:50:27,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:50:27,838 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:50:27,855 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:50:28,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:50:28,039 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:50:28,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:50:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1064658186, now seen corresponding path program 3 times [2024-09-11 19:50:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:50:28,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400477084] [2024-09-11 19:50:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:50:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:50:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:35,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:50:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:35,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:50:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:35,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:50:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:35,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:50:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:35,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-11 19:50:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:35,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:50:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:50:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 19:50:35,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:50:35,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400477084] [2024-09-11 19:50:35,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400477084] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:50:35,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13634261] [2024-09-11 19:50:35,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:50:35,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:50:35,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:50:35,405 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) [2024-09-11 19:50:35,407 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:50:35,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:50:35,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:50:35,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-11 19:50:35,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:50:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 19:50:37,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:51:31,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13634261] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:51:31,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:51:31,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2024-09-11 19:51:31,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079158051] [2024-09-11 19:51:31,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:51:31,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 19:51:31,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:51:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 19:51:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=824, Unknown=3, NotChecked=0, Total=992 [2024-09-11 19:51:31,203 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-11 19:51:37,392 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 111 DAG size of output: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:51:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:51:41,038 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2024-09-11 19:51:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 19:51:41,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 50 [2024-09-11 19:51:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:51:41,040 INFO L225 Difference]: With dead ends: 88 [2024-09-11 19:51:41,040 INFO L226 Difference]: Without dead ends: 51 [2024-09-11 19:51:41,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=309, Invalid=1328, Unknown=3, NotChecked=0, Total=1640 [2024-09-11 19:51:41,042 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:51:41,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 273 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-11 19:51:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-11 19:51:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2024-09-11 19:51:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 19:51:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-09-11 19:51:41,066 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 50 [2024-09-11 19:51:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:51:41,066 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-09-11 19:51:41,066 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-11 19:51:41,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:51:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-09-11 19:51:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-11 19:51:41,067 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:51:41,068 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:51:41,076 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 19:51:41,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-11 19:51:41,272 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:51:41,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:51:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1007399884, now seen corresponding path program 1 times [2024-09-11 19:51:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:51:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225141435] [2024-09-11 19:51:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:51:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:51:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:51:41,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126301497] [2024-09-11 19:51:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:51:41,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:51:41,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:51:41,311 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) [2024-09-11 19:51:41,313 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:51:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:51:41,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-11 19:51:41,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:51:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 19:51:42,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:51:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 19:51:52,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:51:52,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225141435] [2024-09-11 19:51:52,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:51:52,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126301497] [2024-09-11 19:51:52,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126301497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:51:52,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:51:52,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2024-09-11 19:51:52,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334504886] [2024-09-11 19:51:52,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:51:52,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 19:51:52,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:51:52,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 19:51:52,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=359, Unknown=1, NotChecked=0, Total=462 [2024-09-11 19:51:52,171 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-11 19:52:56,597 WARN L293 SmtUtils]: Spent 1.05m on a formula simplification that was a NOOP. DAG size: 87 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:53:01,250 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 [] [2024-09-11 19:53:05,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:53:21,329 WARN L293 SmtUtils]: Spent 10.46s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:53:27,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:53:31,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:53:36,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:53:41,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:53:52,483 WARN L293 SmtUtils]: Spent 8.74s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:53:58,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:54:02,891 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 [] [2024-09-11 19:54:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:03,273 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2024-09-11 19:54:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 19:54:03,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 50 [2024-09-11 19:54:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:03,275 INFO L225 Difference]: With dead ends: 79 [2024-09-11 19:54:03,275 INFO L226 Difference]: Without dead ends: 60 [2024-09-11 19:54:03,276 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 100.0s TimeCoverageRelationStatistics Valid=231, Invalid=759, Unknown=2, NotChecked=0, Total=992 [2024-09-11 19:54:03,277 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 24 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:03,277 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 281 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 339 Invalid, 8 Unknown, 0 Unchecked, 40.6s Time] [2024-09-11 19:54:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-11 19:54:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2024-09-11 19:54:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 19:54:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-09-11 19:54:03,326 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 50 [2024-09-11 19:54:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:03,326 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-09-11 19:54:03,327 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-11 19:54:03,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-09-11 19:54:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-11 19:54:03,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:03,328 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:03,335 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:03,528 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:03,529 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:03,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:03,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1710440895, now seen corresponding path program 2 times [2024-09-11 19:54:03,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:03,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445947346] [2024-09-11 19:54:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:03,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-11 19:54:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-11 19:54:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 19:54:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-11 19:54:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-11 19:54:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-09-11 19:54:04,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:04,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445947346] [2024-09-11 19:54:04,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445947346] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:04,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365899166] [2024-09-11 19:54:04,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:54:04,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:04,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:04,222 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) [2024-09-11 19:54:04,223 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:54:04,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:54:04,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:54:04,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-11 19:54:04,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-11 19:54:04,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-11 19:54:05,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365899166] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:54:05,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:54:05,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 25 [2024-09-11 19:54:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863228274] [2024-09-11 19:54:05,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:05,805 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 19:54:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 19:54:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:54:05,806 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 12 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-11 19:54:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:06,746 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2024-09-11 19:54:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:54:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 12 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) Word has length 74 [2024-09-11 19:54:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:06,747 INFO L225 Difference]: With dead ends: 59 [2024-09-11 19:54:06,747 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 19:54:06,747 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:54:06,748 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:06,748 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 197 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:54:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 19:54:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 19:54:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:54:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 19:54:06,749 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2024-09-11 19:54:06,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:06,749 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 19:54:06,749 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 12 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-11 19:54:06,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 19:54:06,749 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 19:54:06,753 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 19:54:06,770 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 19:54:06,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:06,956 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1] [2024-09-11 19:54:06,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.