/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:05:34,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:05:34,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:05:34,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:05:34,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:05:34,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:05:34,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:05:34,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:05:34,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:05:34,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:05:34,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:05:34,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:05:34,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:05:34,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:05:34,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:05:34,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:05:34,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:05:34,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:05:34,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:05:34,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:05:34,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:05:34,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:05:34,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:05:34,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:05:34,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 07:05:34,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 07:05:34,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 07:05:34,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 07:05:34,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 07:05:34,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 07:05:34,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 07:05:34,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 07:05:34,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 07:05:34,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 07:05:34,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 07:05:34,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 07:05:34,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 07:05:34,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 07:05:34,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:05:34,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:05:34,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:05:34,117 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 07:05:34,134 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:05:34,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:05:34,135 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:05:34,135 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:05:34,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:05:34,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:05:34,136 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:05:34,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:05:34,136 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:05:34,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:05:34,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:05:34,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:05:34,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:05:34,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:05:34,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:05:34,137 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:05:34,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:05:34,137 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:05:34,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:05:34,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:05:34,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:05:34,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:05:34,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:05:34,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:05:34,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:05:34,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:05:34,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:05:34,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:05:34,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:05:34,139 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:05:34,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:05:34,139 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:05:34,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:05:34,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:05:34,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:05:34,338 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:05:34,338 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:05:34,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-01-28 07:05:35,498 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:05:35,836 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:05:35,837 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-01-28 07:05:35,858 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a21529609/ac0fb299af16499782185b11dbfcd313/FLAGb3f21173e [2023-01-28 07:05:36,094 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a21529609/ac0fb299af16499782185b11dbfcd313 [2023-01-28 07:05:36,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:05:36,098 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:05:36,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:05:36,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:05:36,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:05:36,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:36,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f68cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36, skipping insertion in model container [2023-01-28 07:05:36,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:36,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:05:36,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:05:36,775 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-01-28 07:05:36,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:05:36,796 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:05:36,864 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-01-28 07:05:36,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:05:36,950 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 07:05:36,950 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 07:05:36,956 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:05:36,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36 WrapperNode [2023-01-28 07:05:36,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:05:36,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:05:36,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:05:36,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:05:36,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:36,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,023 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 283 [2023-01-28 07:05:37,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:05:37,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:05:37,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:05:37,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:05:37,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,065 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:05:37,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:05:37,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:05:37,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:05:37,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (1/1) ... [2023-01-28 07:05:37,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:05:37,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:05:37,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 07:05:37,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 07:05:37,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 07:05:37,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:05:37,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 07:05:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:05:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:05:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-01-28 07:05:37,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-01-28 07:05:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:05:37,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:05:37,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:05:37,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:05:37,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:05:37,198 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 07:05:37,552 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:05:37,553 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:05:37,852 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:05:37,907 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:05:37,908 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-01-28 07:05:37,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:05:37 BoogieIcfgContainer [2023-01-28 07:05:37,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:05:37,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:05:37,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:05:37,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:05:37,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:05:36" (1/3) ... [2023-01-28 07:05:37,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5bbbe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:05:37, skipping insertion in model container [2023-01-28 07:05:37,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:05:36" (2/3) ... [2023-01-28 07:05:37,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5bbbe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:05:37, skipping insertion in model container [2023-01-28 07:05:37,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:05:37" (3/3) ... [2023-01-28 07:05:37,917 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-01-28 07:05:37,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:05:37,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:05:37,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:05:38,025 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:05:38,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 248 transitions, 504 flow [2023-01-28 07:05:38,179 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2023-01-28 07:05:38,179 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:05:38,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 262 events. 19/262 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 413 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 182. Up to 4 conditions per place. [2023-01-28 07:05:38,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 248 transitions, 504 flow [2023-01-28 07:05:38,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 243 transitions, 491 flow [2023-01-28 07:05:38,200 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:05:38,208 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 243 transitions, 491 flow [2023-01-28 07:05:38,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 243 transitions, 491 flow [2023-01-28 07:05:38,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 243 transitions, 491 flow [2023-01-28 07:05:38,268 INFO L130 PetriNetUnfolder]: 18/257 cut-off events. [2023-01-28 07:05:38,268 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:05:38,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 257 events. 18/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 373 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 182. Up to 4 conditions per place. [2023-01-28 07:05:38,278 INFO L119 LiptonReduction]: Number of co-enabled transitions 6520 [2023-01-28 07:05:44,749 INFO L134 LiptonReduction]: Checked pairs total: 6702 [2023-01-28 07:05:44,749 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-01-28 07:05:44,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:05:44,765 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@418b24e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:05:44,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 07:05:44,768 INFO L130 PetriNetUnfolder]: 1/17 cut-off events. [2023-01-28 07:05:44,769 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:05:44,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:05:44,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:05:44,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:05:44,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:05:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1736173151, now seen corresponding path program 1 times [2023-01-28 07:05:44,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:05:44,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810981897] [2023-01-28 07:05:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:44,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:05:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:05:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:05:45,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:05:45,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810981897] [2023-01-28 07:05:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810981897] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:05:45,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:05:45,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:05:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26739469] [2023-01-28 07:05:45,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:05:45,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:05:45,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:05:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:05:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:05:45,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 490 [2023-01-28 07:05:45,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 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) [2023-01-28 07:05:45,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:05:45,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 490 [2023-01-28 07:05:45,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:05:45,295 INFO L130 PetriNetUnfolder]: 82/169 cut-off events. [2023-01-28 07:05:45,295 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:05:45,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 169 events. 82/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 470 event pairs, 57 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2023-01-28 07:05:45,298 INFO L137 encePairwiseOnDemand]: 483/490 looper letters, 30 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-01-28 07:05:45,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 139 flow [2023-01-28 07:05:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:05:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:05:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-01-28 07:05:45,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2023-01-28 07:05:45,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-01-28 07:05:45,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-01-28 07:05:45,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:05:45,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-01-28 07:05:45,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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) [2023-01-28 07:05:45,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 07:05:45,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 07:05:45,338 INFO L175 Difference]: Start difference. First operand has 30 places, 37 transitions, 79 flow. Second operand 3 states and 695 transitions. [2023-01-28 07:05:45,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 139 flow [2023-01-28 07:05:45,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:05:45,343 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 81 flow [2023-01-28 07:05:45,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-01-28 07:05:45,349 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-01-28 07:05:45,349 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 81 flow [2023-01-28 07:05:45,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 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) [2023-01-28 07:05:45,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:05:45,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:05:45,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:05:45,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:05:45,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:05:45,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1889925242, now seen corresponding path program 1 times [2023-01-28 07:05:45,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:05:45,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826110922] [2023-01-28 07:05:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:45,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:05:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:05:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:05:45,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:05:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826110922] [2023-01-28 07:05:45,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826110922] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:05:45,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:05:45,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 07:05:45,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649768702] [2023-01-28 07:05:45,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:05:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:05:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:05:45,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:05:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:05:45,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 490 [2023-01-28 07:05:45,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 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) [2023-01-28 07:05:45,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:05:45,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 490 [2023-01-28 07:05:45,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:05:45,633 INFO L130 PetriNetUnfolder]: 118/237 cut-off events. [2023-01-28 07:05:45,633 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:05:45,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 237 events. 118/237 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 646 event pairs, 54 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 474. Up to 157 conditions per place. [2023-01-28 07:05:45,634 INFO L137 encePairwiseOnDemand]: 486/490 looper letters, 44 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-01-28 07:05:45,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 48 transitions, 205 flow [2023-01-28 07:05:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:05:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:05:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-01-28 07:05:45,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48707482993197276 [2023-01-28 07:05:45,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-01-28 07:05:45,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-01-28 07:05:45,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:05:45,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-01-28 07:05:45,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 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) [2023-01-28 07:05:45,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 07:05:45,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 07:05:45,643 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 81 flow. Second operand 3 states and 716 transitions. [2023-01-28 07:05:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 48 transitions, 205 flow [2023-01-28 07:05:45,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 48 transitions, 201 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:05:45,644 INFO L231 Difference]: Finished difference. Result has 34 places, 36 transitions, 103 flow [2023-01-28 07:05:45,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=36} [2023-01-28 07:05:45,645 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-01-28 07:05:45,645 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 36 transitions, 103 flow [2023-01-28 07:05:45,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 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) [2023-01-28 07:05:45,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:05:45,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:05:45,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 07:05:45,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:05:45,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:05:45,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1006138939, now seen corresponding path program 1 times [2023-01-28 07:05:45,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:05:45,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675961458] [2023-01-28 07:05:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:45,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:05:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:05:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:05:45,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:05:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675961458] [2023-01-28 07:05:45,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675961458] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:05:45,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:05:45,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:05:45,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831388513] [2023-01-28 07:05:45,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:05:45,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:05:45,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:05:45,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:05:45,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:05:45,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 490 [2023-01-28 07:05:45,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 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) [2023-01-28 07:05:45,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:05:45,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 490 [2023-01-28 07:05:45,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:05:45,832 INFO L130 PetriNetUnfolder]: 121/253 cut-off events. [2023-01-28 07:05:45,832 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 07:05:45,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 253 events. 121/253 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 739 event pairs, 67 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 540. Up to 216 conditions per place. [2023-01-28 07:05:45,833 INFO L137 encePairwiseOnDemand]: 485/490 looper letters, 35 selfloop transitions, 3 changer transitions 5/44 dead transitions. [2023-01-28 07:05:45,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 205 flow [2023-01-28 07:05:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:05:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:05:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-01-28 07:05:45,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925170068027211 [2023-01-28 07:05:45,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-01-28 07:05:45,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-01-28 07:05:45,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:05:45,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-01-28 07:05:45,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 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) [2023-01-28 07:05:45,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 07:05:45,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 07:05:45,841 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 103 flow. Second operand 3 states and 577 transitions. [2023-01-28 07:05:45,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 205 flow [2023-01-28 07:05:45,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:05:45,843 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 119 flow [2023-01-28 07:05:45,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2023-01-28 07:05:45,844 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-01-28 07:05:45,844 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 119 flow [2023-01-28 07:05:45,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 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) [2023-01-28 07:05:45,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:05:45,845 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:05:45,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:05:45,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:05:45,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:05:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1029831578, now seen corresponding path program 1 times [2023-01-28 07:05:45,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:05:45,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441815159] [2023-01-28 07:05:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:45,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:05:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:05:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:05:45,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:05:45,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441815159] [2023-01-28 07:05:45,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441815159] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:05:45,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069391010] [2023-01-28 07:05:45,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:45,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:05:45,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:05:45,953 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:05:45,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 07:05:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:05:46,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 07:05:46,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:05:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:05:46,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:05:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:05:46,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069391010] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:05:46,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:05:46,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-01-28 07:05:46,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289380513] [2023-01-28 07:05:46,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:05:46,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 07:05:46,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:05:46,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 07:05:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-01-28 07:05:46,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 490 [2023-01-28 07:05:46,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 119 flow. Second operand has 8 states, 8 states have (on average 221.875) internal successors, (1775), 8 states have internal predecessors, (1775), 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) [2023-01-28 07:05:46,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:05:46,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 490 [2023-01-28 07:05:46,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:05:46,333 INFO L130 PetriNetUnfolder]: 83/183 cut-off events. [2023-01-28 07:05:46,334 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-01-28 07:05:46,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 183 events. 83/183 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 458 event pairs, 52 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 433. Up to 178 conditions per place. [2023-01-28 07:05:46,335 INFO L137 encePairwiseOnDemand]: 487/490 looper letters, 34 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2023-01-28 07:05:46,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 197 flow [2023-01-28 07:05:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:05:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:05:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 909 transitions. [2023-01-28 07:05:46,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46377551020408164 [2023-01-28 07:05:46,341 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 909 transitions. [2023-01-28 07:05:46,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 909 transitions. [2023-01-28 07:05:46,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:05:46,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 909 transitions. [2023-01-28 07:05:46,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 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) [2023-01-28 07:05:46,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 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) [2023-01-28 07:05:46,348 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 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) [2023-01-28 07:05:46,348 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 119 flow. Second operand 4 states and 909 transitions. [2023-01-28 07:05:46,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 197 flow [2023-01-28 07:05:46,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:05:46,351 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 129 flow [2023-01-28 07:05:46,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-01-28 07:05:46,353 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-01-28 07:05:46,353 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 129 flow [2023-01-28 07:05:46,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 221.875) internal successors, (1775), 8 states have internal predecessors, (1775), 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) [2023-01-28 07:05:46,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:05:46,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:05:46,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 07:05:46,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:05:46,561 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:05:46,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:05:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash 115618098, now seen corresponding path program 2 times [2023-01-28 07:05:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:05:46,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208559465] [2023-01-28 07:05:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:46,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:05:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:05:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 07:05:46,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:05:46,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208559465] [2023-01-28 07:05:46,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208559465] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:05:46,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:05:46,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 07:05:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473563067] [2023-01-28 07:05:46,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:05:46,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:05:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:05:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:05:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:05:46,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 490 [2023-01-28 07:05:46,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 129 flow. Second operand has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 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) [2023-01-28 07:05:46,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:05:46,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 490 [2023-01-28 07:05:46,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:05:46,915 INFO L130 PetriNetUnfolder]: 83/184 cut-off events. [2023-01-28 07:05:46,915 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-01-28 07:05:46,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 184 events. 83/184 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 457 event pairs, 49 based on Foata normal form. 1/169 useless extension candidates. Maximal degree in co-relation 432. Up to 152 conditions per place. [2023-01-28 07:05:46,916 INFO L137 encePairwiseOnDemand]: 486/490 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2023-01-28 07:05:46,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 40 transitions, 211 flow [2023-01-28 07:05:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:05:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:05:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 730 transitions. [2023-01-28 07:05:46,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37244897959183676 [2023-01-28 07:05:46,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 730 transitions. [2023-01-28 07:05:46,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 730 transitions. [2023-01-28 07:05:46,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:05:46,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 730 transitions. [2023-01-28 07:05:46,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.5) internal successors, (730), 4 states have internal predecessors, (730), 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) [2023-01-28 07:05:46,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 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) [2023-01-28 07:05:46,924 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 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) [2023-01-28 07:05:46,925 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 129 flow. Second operand 4 states and 730 transitions. [2023-01-28 07:05:46,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 40 transitions, 211 flow [2023-01-28 07:05:46,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 203 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 07:05:46,926 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-01-28 07:05:46,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-01-28 07:05:46,927 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-01-28 07:05:46,927 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-01-28 07:05:46,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 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) [2023-01-28 07:05:46,933 INFO L805 garLoopResultBuilder]: Registering result SAFE for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 07:05:46,933 INFO L805 garLoopResultBuilder]: Registering result SAFE for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-28 07:05:46,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 07:05:46,934 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-01-28 07:05:46,935 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-01-28 07:05:46,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 248 transitions, 504 flow [2023-01-28 07:05:46,984 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2023-01-28 07:05:46,984 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:05:46,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 262 events. 19/262 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 413 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 182. Up to 4 conditions per place. [2023-01-28 07:05:46,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 248 transitions, 504 flow [2023-01-28 07:05:46,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 243 transitions, 491 flow [2023-01-28 07:05:46,987 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:05:46,987 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 243 transitions, 491 flow [2023-01-28 07:05:46,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 243 transitions, 491 flow [2023-01-28 07:05:46,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 243 transitions, 491 flow [2023-01-28 07:05:47,010 INFO L130 PetriNetUnfolder]: 18/257 cut-off events. [2023-01-28 07:05:47,010 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:05:47,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 257 events. 18/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 373 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 182. Up to 4 conditions per place. [2023-01-28 07:05:47,014 INFO L119 LiptonReduction]: Number of co-enabled transitions 6520 [2023-01-28 07:05:53,014 INFO L134 LiptonReduction]: Checked pairs total: 6487 [2023-01-28 07:05:53,015 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-01-28 07:05:53,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:05:53,017 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@418b24e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:05:53,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:05:53,019 INFO L130 PetriNetUnfolder]: 1/14 cut-off events. [2023-01-28 07:05:53,019 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:05:53,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:05:53,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 07:05:53,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:05:53,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:05:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1964263690, now seen corresponding path program 1 times [2023-01-28 07:05:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:05:53,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541773223] [2023-01-28 07:05:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:53,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:05:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:05:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 07:05:53,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:05:53,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541773223] [2023-01-28 07:05:53,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541773223] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:05:53,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:05:53,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:05:53,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969050766] [2023-01-28 07:05:53,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:05:53,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:05:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:05:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:05:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:05:53,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 490 [2023-01-28 07:05:53,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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) [2023-01-28 07:05:53,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:05:53,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 490 [2023-01-28 07:05:53,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:05:53,146 INFO L130 PetriNetUnfolder]: 82/169 cut-off events. [2023-01-28 07:05:53,148 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:05:53,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 169 events. 82/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 471 event pairs, 57 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2023-01-28 07:05:53,150 INFO L137 encePairwiseOnDemand]: 483/490 looper letters, 30 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-01-28 07:05:53,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 139 flow [2023-01-28 07:05:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:05:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:05:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-01-28 07:05:53,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2023-01-28 07:05:53,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-01-28 07:05:53,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-01-28 07:05:53,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:05:53,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-01-28 07:05:53,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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) [2023-01-28 07:05:53,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 07:05:53,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 07:05:53,158 INFO L175 Difference]: Start difference. First operand has 30 places, 37 transitions, 79 flow. Second operand 3 states and 695 transitions. [2023-01-28 07:05:53,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 139 flow [2023-01-28 07:05:53,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:05:53,159 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 81 flow [2023-01-28 07:05:53,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-01-28 07:05:53,161 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-01-28 07:05:53,161 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 81 flow [2023-01-28 07:05:53,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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) [2023-01-28 07:05:53,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:05:53,162 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 07:05:53,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:05:53,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:05:53,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:05:53,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1013036927, now seen corresponding path program 1 times [2023-01-28 07:05:53,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:05:53,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129062762] [2023-01-28 07:05:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:53,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:05:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:05:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 07:05:53,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:05:53,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129062762] [2023-01-28 07:05:53,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129062762] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:05:53,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48097038] [2023-01-28 07:05:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:53,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:05:53,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:05:53,241 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:05:53,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 07:05:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:05:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 07:05:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:05:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 07:05:53,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:05:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 07:05:53,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48097038] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:05:53,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:05:53,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:05:53,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854648906] [2023-01-28 07:05:53,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:05:53,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:05:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:05:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:05:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:05:53,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 490 [2023-01-28 07:05:53,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 81 flow. Second operand has 7 states, 7 states have (on average 220.57142857142858) internal successors, (1544), 7 states have internal predecessors, (1544), 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) [2023-01-28 07:05:53,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:05:53,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 490 [2023-01-28 07:05:53,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:05:53,469 INFO L130 PetriNetUnfolder]: 57/124 cut-off events. [2023-01-28 07:05:53,470 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:05:53,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 124 events. 57/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 300 event pairs, 38 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 249. Up to 121 conditions per place. [2023-01-28 07:05:53,473 INFO L137 encePairwiseOnDemand]: 487/490 looper letters, 30 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-01-28 07:05:53,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 151 flow [2023-01-28 07:05:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:05:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:05:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 910 transitions. [2023-01-28 07:05:53,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-01-28 07:05:53,477 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 910 transitions. [2023-01-28 07:05:53,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 910 transitions. [2023-01-28 07:05:53,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:05:53,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 910 transitions. [2023-01-28 07:05:53,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 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) [2023-01-28 07:05:53,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 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) [2023-01-28 07:05:53,481 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 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) [2023-01-28 07:05:53,481 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 81 flow. Second operand 4 states and 910 transitions. [2023-01-28 07:05:53,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 151 flow [2023-01-28 07:05:53,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 147 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:05:53,482 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 93 flow [2023-01-28 07:05:53,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-01-28 07:05:53,483 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-01-28 07:05:53,483 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 93 flow [2023-01-28 07:05:53,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 220.57142857142858) internal successors, (1544), 7 states have internal predecessors, (1544), 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) [2023-01-28 07:05:53,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:05:53,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-01-28 07:05:53,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 07:05:53,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-01-28 07:05:53,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:05:53,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:05:53,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1179924458, now seen corresponding path program 2 times [2023-01-28 07:05:53,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:05:53,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933745807] [2023-01-28 07:05:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:05:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:05:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:05:53,719 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:05:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:05:53,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:05:53,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:05:53,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:05:53,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 07:05:53,771 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-01-28 07:05:53,773 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:05:53,773 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:05:53,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:05:53,830 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:05:53,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 413 transitions, 844 flow [2023-01-28 07:05:53,902 INFO L130 PetriNetUnfolder]: 36/463 cut-off events. [2023-01-28 07:05:53,902 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:05:53,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 463 events. 36/463 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1452 event pairs, 0 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 358. Up to 8 conditions per place. [2023-01-28 07:05:53,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 388 places, 413 transitions, 844 flow [2023-01-28 07:05:53,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 388 places, 413 transitions, 844 flow [2023-01-28 07:05:53,912 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:05:53,912 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 388 places, 413 transitions, 844 flow [2023-01-28 07:05:53,912 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 388 places, 413 transitions, 844 flow [2023-01-28 07:05:53,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 413 transitions, 844 flow [2023-01-28 07:05:53,992 INFO L130 PetriNetUnfolder]: 36/463 cut-off events. [2023-01-28 07:05:53,992 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:05:53,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 463 events. 36/463 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1452 event pairs, 0 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 358. Up to 8 conditions per place. [2023-01-28 07:05:54,023 INFO L119 LiptonReduction]: Number of co-enabled transitions 69764 [2023-01-28 07:06:02,638 INFO L134 LiptonReduction]: Checked pairs total: 81984 [2023-01-28 07:06:02,638 INFO L136 LiptonReduction]: Total number of compositions: 394 [2023-01-28 07:06:02,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:06:02,640 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@418b24e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:06:02,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 07:06:02,643 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2023-01-28 07:06:02,643 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:06:02,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:02,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:02,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:02,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1969131425, now seen corresponding path program 1 times [2023-01-28 07:06:02,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:02,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642062234] [2023-01-28 07:06:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:02,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:06:02,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:02,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642062234] [2023-01-28 07:06:02,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642062234] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:02,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:06:02,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:06:02,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360703364] [2023-01-28 07:06:02,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:02,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 07:06:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 07:06:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 07:06:02,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 380 out of 807 [2023-01-28 07:06:02,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 82 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 384.0) internal successors, (768), 2 states have internal predecessors, (768), 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) [2023-01-28 07:06:02,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:02,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 380 of 807 [2023-01-28 07:06:02,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:03,927 INFO L130 PetriNetUnfolder]: 8734/12804 cut-off events. [2023-01-28 07:06:03,927 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-01-28 07:06:03,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25713 conditions, 12804 events. 8734/12804 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 69253 event pairs, 6840 based on Foata normal form. 0/9297 useless extension candidates. Maximal degree in co-relation 20786. Up to 12767 conditions per place. [2023-01-28 07:06:03,988 INFO L137 encePairwiseOnDemand]: 801/807 looper letters, 73 selfloop transitions, 0 changer transitions 0/76 dead transitions. [2023-01-28 07:06:03,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 316 flow [2023-01-28 07:06:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 07:06:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 07:06:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 839 transitions. [2023-01-28 07:06:03,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198265179677819 [2023-01-28 07:06:03,991 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 839 transitions. [2023-01-28 07:06:03,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 839 transitions. [2023-01-28 07:06:03,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:03,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 839 transitions. [2023-01-28 07:06:03,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 419.5) internal successors, (839), 2 states have internal predecessors, (839), 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) [2023-01-28 07:06:03,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 807.0) internal successors, (2421), 3 states have internal predecessors, (2421), 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) [2023-01-28 07:06:03,996 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 807.0) internal successors, (2421), 3 states have internal predecessors, (2421), 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) [2023-01-28 07:06:03,996 INFO L175 Difference]: Start difference. First operand has 66 places, 82 transitions, 182 flow. Second operand 2 states and 839 transitions. [2023-01-28 07:06:03,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 316 flow [2023-01-28 07:06:03,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:06:04,001 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 170 flow [2023-01-28 07:06:04,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2023-01-28 07:06:04,005 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-01-28 07:06:04,005 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 170 flow [2023-01-28 07:06:04,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 384.0) internal successors, (768), 2 states have internal predecessors, (768), 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) [2023-01-28 07:06:04,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:04,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:04,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:06:04,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:04,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:04,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1747483500, now seen corresponding path program 1 times [2023-01-28 07:06:04,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:04,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73758900] [2023-01-28 07:06:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:06:04,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:04,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73758900] [2023-01-28 07:06:04,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73758900] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:04,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:06:04,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 07:06:04,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871228732] [2023-01-28 07:06:04,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:04,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:06:04,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:06:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:06:04,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 807 [2023-01-28 07:06:04,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 376.3333333333333) internal successors, (1129), 3 states have internal predecessors, (1129), 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) [2023-01-28 07:06:04,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:04,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 807 [2023-01-28 07:06:04,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:05,648 INFO L130 PetriNetUnfolder]: 12961/18907 cut-off events. [2023-01-28 07:06:05,648 INFO L131 PetriNetUnfolder]: For 286/286 co-relation queries the response was YES. [2023-01-28 07:06:05,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37976 conditions, 18907 events. 12961/18907 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 106521 event pairs, 6840 based on Foata normal form. 0/13801 useless extension candidates. Maximal degree in co-relation 37971. Up to 12610 conditions per place. [2023-01-28 07:06:05,737 INFO L137 encePairwiseOnDemand]: 803/807 looper letters, 123 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2023-01-28 07:06:05,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 129 transitions, 536 flow [2023-01-28 07:06:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:06:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:06:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1246 transitions. [2023-01-28 07:06:05,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146633622470054 [2023-01-28 07:06:05,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1246 transitions. [2023-01-28 07:06:05,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1246 transitions. [2023-01-28 07:06:05,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:05,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1246 transitions. [2023-01-28 07:06:05,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 415.3333333333333) internal successors, (1246), 3 states have internal predecessors, (1246), 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) [2023-01-28 07:06:05,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:05,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:05,749 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 170 flow. Second operand 3 states and 1246 transitions. [2023-01-28 07:06:05,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 129 transitions, 536 flow [2023-01-28 07:06:05,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 129 transitions, 536 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:06:05,752 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 196 flow [2023-01-28 07:06:05,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2023-01-28 07:06:05,753 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2023-01-28 07:06:05,753 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 196 flow [2023-01-28 07:06:05,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 376.3333333333333) internal successors, (1129), 3 states have internal predecessors, (1129), 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) [2023-01-28 07:06:05,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:05,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:05,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:06:05,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:05,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash -626584826, now seen corresponding path program 1 times [2023-01-28 07:06:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:05,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265479563] [2023-01-28 07:06:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:05,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 07:06:05,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:05,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265479563] [2023-01-28 07:06:05,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265479563] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:05,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:06:05,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 07:06:05,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694842199] [2023-01-28 07:06:05,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:05,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:06:05,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:06:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:06:05,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 807 [2023-01-28 07:06:05,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 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) [2023-01-28 07:06:05,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:05,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 807 [2023-01-28 07:06:05,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:08,342 INFO L130 PetriNetUnfolder]: 19147/27817 cut-off events. [2023-01-28 07:06:08,342 INFO L131 PetriNetUnfolder]: For 2841/2841 co-relation queries the response was YES. [2023-01-28 07:06:08,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58088 conditions, 27817 events. 19147/27817 cut-off events. For 2841/2841 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 159720 event pairs, 10152 based on Foata normal form. 0/21100 useless extension candidates. Maximal degree in co-relation 58081. Up to 18652 conditions per place. [2023-01-28 07:06:08,464 INFO L137 encePairwiseOnDemand]: 803/807 looper letters, 128 selfloop transitions, 3 changer transitions 0/134 dead transitions. [2023-01-28 07:06:08,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 134 transitions, 591 flow [2023-01-28 07:06:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:06:08,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:06:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1245 transitions. [2023-01-28 07:06:08,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142503097893433 [2023-01-28 07:06:08,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1245 transitions. [2023-01-28 07:06:08,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1245 transitions. [2023-01-28 07:06:08,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:08,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1245 transitions. [2023-01-28 07:06:08,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 415.0) internal successors, (1245), 3 states have internal predecessors, (1245), 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) [2023-01-28 07:06:08,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:08,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:08,478 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 196 flow. Second operand 3 states and 1245 transitions. [2023-01-28 07:06:08,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 134 transitions, 591 flow [2023-01-28 07:06:08,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 134 transitions, 579 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:06:08,503 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 216 flow [2023-01-28 07:06:08,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2023-01-28 07:06:08,505 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2023-01-28 07:06:08,505 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 216 flow [2023-01-28 07:06:08,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 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) [2023-01-28 07:06:08,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:08,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:08,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 07:06:08,506 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:08,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:08,506 INFO L85 PathProgramCache]: Analyzing trace with hash -713856160, now seen corresponding path program 1 times [2023-01-28 07:06:08,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:08,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246064051] [2023-01-28 07:06:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:08,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:06:08,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:08,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246064051] [2023-01-28 07:06:08,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246064051] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:08,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:06:08,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:06:08,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840143816] [2023-01-28 07:06:08,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:08,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:06:08,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:08,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:06:08,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:06:08,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 807 [2023-01-28 07:06:08,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 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) [2023-01-28 07:06:08,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:08,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 807 [2023-01-28 07:06:08,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:10,861 INFO L130 PetriNetUnfolder]: 21910/32064 cut-off events. [2023-01-28 07:06:10,861 INFO L131 PetriNetUnfolder]: For 2929/2929 co-relation queries the response was YES. [2023-01-28 07:06:10,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68636 conditions, 32064 events. 21910/32064 cut-off events. For 2929/2929 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 190710 event pairs, 13692 based on Foata normal form. 0/25095 useless extension candidates. Maximal degree in co-relation 68628. Up to 28184 conditions per place. [2023-01-28 07:06:11,000 INFO L137 encePairwiseOnDemand]: 794/807 looper letters, 112 selfloop transitions, 12 changer transitions 2/129 dead transitions. [2023-01-28 07:06:11,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 129 transitions, 590 flow [2023-01-28 07:06:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:06:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:06:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-01-28 07:06:11,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432878975629905 [2023-01-28 07:06:11,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-01-28 07:06:11,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-01-28 07:06:11,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:11,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-01-28 07:06:11,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 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) [2023-01-28 07:06:11,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:11,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:11,010 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 216 flow. Second operand 3 states and 1048 transitions. [2023-01-28 07:06:11,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 129 transitions, 590 flow [2023-01-28 07:06:11,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 129 transitions, 578 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:06:11,055 INFO L231 Difference]: Finished difference. Result has 75 places, 93 transitions, 306 flow [2023-01-28 07:06:11,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=75, PETRI_TRANSITIONS=93} [2023-01-28 07:06:11,057 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2023-01-28 07:06:11,057 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 93 transitions, 306 flow [2023-01-28 07:06:11,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 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) [2023-01-28 07:06:11,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:11,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:11,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 07:06:11,063 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:11,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash -884711764, now seen corresponding path program 1 times [2023-01-28 07:06:11,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:11,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327796556] [2023-01-28 07:06:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:11,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:06:11,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:11,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327796556] [2023-01-28 07:06:11,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327796556] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:11,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:06:11,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:06:11,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665727768] [2023-01-28 07:06:11,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:11,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:06:11,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:06:11,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:06:11,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 807 [2023-01-28 07:06:11,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 93 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 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) [2023-01-28 07:06:11,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:11,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 807 [2023-01-28 07:06:11,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:13,631 INFO L130 PetriNetUnfolder]: 21910/32006 cut-off events. [2023-01-28 07:06:13,632 INFO L131 PetriNetUnfolder]: For 6005/6005 co-relation queries the response was YES. [2023-01-28 07:06:13,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75175 conditions, 32006 events. 21910/32006 cut-off events. For 6005/6005 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 188643 event pairs, 16418 based on Foata normal form. 0/27122 useless extension candidates. Maximal degree in co-relation 75166. Up to 31903 conditions per place. [2023-01-28 07:06:13,766 INFO L137 encePairwiseOnDemand]: 804/807 looper letters, 89 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-01-28 07:06:13,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 490 flow [2023-01-28 07:06:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:06:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:06:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1182 transitions. [2023-01-28 07:06:13,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882280049566295 [2023-01-28 07:06:13,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1182 transitions. [2023-01-28 07:06:13,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1182 transitions. [2023-01-28 07:06:13,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:13,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1182 transitions. [2023-01-28 07:06:13,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 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) [2023-01-28 07:06:13,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:13,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:13,781 INFO L175 Difference]: Start difference. First operand has 75 places, 93 transitions, 306 flow. Second operand 3 states and 1182 transitions. [2023-01-28 07:06:13,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 490 flow [2023-01-28 07:06:13,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 94 transitions, 466 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:06:13,866 INFO L231 Difference]: Finished difference. Result has 76 places, 94 transitions, 294 flow [2023-01-28 07:06:13,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=76, PETRI_TRANSITIONS=94} [2023-01-28 07:06:13,867 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2023-01-28 07:06:13,867 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 94 transitions, 294 flow [2023-01-28 07:06:13,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 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) [2023-01-28 07:06:13,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:13,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:13,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 07:06:13,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:13,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:13,869 INFO L85 PathProgramCache]: Analyzing trace with hash 724048708, now seen corresponding path program 1 times [2023-01-28 07:06:13,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:13,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654218726] [2023-01-28 07:06:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:13,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:06:13,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:13,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654218726] [2023-01-28 07:06:13,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654218726] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:06:13,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576575678] [2023-01-28 07:06:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:13,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:06:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:06:13,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:06:13,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 07:06:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:14,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 07:06:14,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:06:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:06:14,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:06:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:06:14,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576575678] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:06:14,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:06:14,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:06:14,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450622082] [2023-01-28 07:06:14,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:06:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:06:14,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:06:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:06:14,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 807 [2023-01-28 07:06:14,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 94 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 372.42857142857144) internal successors, (2607), 7 states have internal predecessors, (2607), 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) [2023-01-28 07:06:14,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:14,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 807 [2023-01-28 07:06:14,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:16,615 INFO L130 PetriNetUnfolder]: 21910/32007 cut-off events. [2023-01-28 07:06:16,616 INFO L131 PetriNetUnfolder]: For 4053/4053 co-relation queries the response was YES. [2023-01-28 07:06:16,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73839 conditions, 32007 events. 21910/32007 cut-off events. For 4053/4053 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 188659 event pairs, 16418 based on Foata normal form. 0/26896 useless extension candidates. Maximal degree in co-relation 73829. Up to 31903 conditions per place. [2023-01-28 07:06:16,770 INFO L137 encePairwiseOnDemand]: 804/807 looper letters, 89 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2023-01-28 07:06:16,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 482 flow [2023-01-28 07:06:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:06:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:06:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1552 transitions. [2023-01-28 07:06:16,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48079306071871125 [2023-01-28 07:06:16,774 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1552 transitions. [2023-01-28 07:06:16,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1552 transitions. [2023-01-28 07:06:16,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:16,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1552 transitions. [2023-01-28 07:06:16,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 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) [2023-01-28 07:06:16,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 807.0) internal successors, (4035), 5 states have internal predecessors, (4035), 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) [2023-01-28 07:06:16,782 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 807.0) internal successors, (4035), 5 states have internal predecessors, (4035), 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) [2023-01-28 07:06:16,782 INFO L175 Difference]: Start difference. First operand has 76 places, 94 transitions, 294 flow. Second operand 4 states and 1552 transitions. [2023-01-28 07:06:16,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 482 flow [2023-01-28 07:06:16,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 478 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:06:16,787 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 306 flow [2023-01-28 07:06:16,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2023-01-28 07:06:16,789 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2023-01-28 07:06:16,789 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 306 flow [2023-01-28 07:06:16,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 372.42857142857144) internal successors, (2607), 7 states have internal predecessors, (2607), 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) [2023-01-28 07:06:16,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:16,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:16,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 07:06:16,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:06:16,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:16,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash -943984212, now seen corresponding path program 2 times [2023-01-28 07:06:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:16,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055162536] [2023-01-28 07:06:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:16,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 07:06:17,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:17,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055162536] [2023-01-28 07:06:17,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055162536] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:17,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:06:17,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 07:06:17,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884766509] [2023-01-28 07:06:17,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:17,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 07:06:17,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 07:06:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 07:06:17,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 807 [2023-01-28 07:06:17,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 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) [2023-01-28 07:06:17,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:17,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 807 [2023-01-28 07:06:17,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:19,740 INFO L130 PetriNetUnfolder]: 23410/34329 cut-off events. [2023-01-28 07:06:19,740 INFO L131 PetriNetUnfolder]: For 4414/4414 co-relation queries the response was YES. [2023-01-28 07:06:19,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79223 conditions, 34329 events. 23410/34329 cut-off events. For 4414/4414 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 205958 event pairs, 14734 based on Foata normal form. 0/28924 useless extension candidates. Maximal degree in co-relation 79212. Up to 28193 conditions per place. [2023-01-28 07:06:19,910 INFO L137 encePairwiseOnDemand]: 794/807 looper letters, 115 selfloop transitions, 21 changer transitions 3/142 dead transitions. [2023-01-28 07:06:19,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 142 transitions, 722 flow [2023-01-28 07:06:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:06:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:06:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1354 transitions. [2023-01-28 07:06:19,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419454770755886 [2023-01-28 07:06:19,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1354 transitions. [2023-01-28 07:06:19,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1354 transitions. [2023-01-28 07:06:19,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:19,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1354 transitions. [2023-01-28 07:06:19,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 338.5) internal successors, (1354), 4 states have internal predecessors, (1354), 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) [2023-01-28 07:06:19,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 807.0) internal successors, (4035), 5 states have internal predecessors, (4035), 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) [2023-01-28 07:06:19,922 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 807.0) internal successors, (4035), 5 states have internal predecessors, (4035), 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) [2023-01-28 07:06:19,922 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 306 flow. Second operand 4 states and 1354 transitions. [2023-01-28 07:06:19,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 142 transitions, 722 flow [2023-01-28 07:06:19,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 142 transitions, 714 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 07:06:19,929 INFO L231 Difference]: Finished difference. Result has 82 places, 105 transitions, 445 flow [2023-01-28 07:06:19,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=445, PETRI_PLACES=82, PETRI_TRANSITIONS=105} [2023-01-28 07:06:19,929 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2023-01-28 07:06:19,929 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 105 transitions, 445 flow [2023-01-28 07:06:19,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 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) [2023-01-28 07:06:19,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:19,930 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:19,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 07:06:19,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:19,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash -793155824, now seen corresponding path program 1 times [2023-01-28 07:06:19,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:19,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838444671] [2023-01-28 07:06:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:19,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 07:06:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:20,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838444671] [2023-01-28 07:06:20,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838444671] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:20,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:06:20,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:06:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720733701] [2023-01-28 07:06:20,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:20,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:06:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:06:20,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:06:20,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 807 [2023-01-28 07:06:20,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 105 transitions, 445 flow. Second operand has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 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) [2023-01-28 07:06:20,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:20,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 807 [2023-01-28 07:06:20,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:22,963 INFO L130 PetriNetUnfolder]: 26279/38741 cut-off events. [2023-01-28 07:06:22,963 INFO L131 PetriNetUnfolder]: For 12258/12258 co-relation queries the response was YES. [2023-01-28 07:06:23,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95763 conditions, 38741 events. 26279/38741 cut-off events. For 12258/12258 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 239744 event pairs, 16010 based on Foata normal form. 0/33137 useless extension candidates. Maximal degree in co-relation 95750. Up to 34348 conditions per place. [2023-01-28 07:06:23,168 INFO L137 encePairwiseOnDemand]: 792/807 looper letters, 132 selfloop transitions, 21 changer transitions 2/158 dead transitions. [2023-01-28 07:06:23,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 158 transitions, 936 flow [2023-01-28 07:06:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:06:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:06:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1047 transitions. [2023-01-28 07:06:23,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43246592317224286 [2023-01-28 07:06:23,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1047 transitions. [2023-01-28 07:06:23,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1047 transitions. [2023-01-28 07:06:23,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:23,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1047 transitions. [2023-01-28 07:06:23,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 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) [2023-01-28 07:06:23,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:23,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 807.0) internal successors, (3228), 4 states have internal predecessors, (3228), 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) [2023-01-28 07:06:23,178 INFO L175 Difference]: Start difference. First operand has 82 places, 105 transitions, 445 flow. Second operand 3 states and 1047 transitions. [2023-01-28 07:06:23,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 158 transitions, 936 flow [2023-01-28 07:06:23,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 158 transitions, 935 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:06:23,207 INFO L231 Difference]: Finished difference. Result has 85 places, 123 transitions, 646 flow [2023-01-28 07:06:23,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=646, PETRI_PLACES=85, PETRI_TRANSITIONS=123} [2023-01-28 07:06:23,208 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2023-01-28 07:06:23,208 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 123 transitions, 646 flow [2023-01-28 07:06:23,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 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) [2023-01-28 07:06:23,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:23,209 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 07:06:23,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:23,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:23,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1397648124, now seen corresponding path program 2 times [2023-01-28 07:06:23,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:23,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054962820] [2023-01-28 07:06:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 07:06:23,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:23,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054962820] [2023-01-28 07:06:23,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054962820] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:23,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:06:23,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 07:06:23,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101222304] [2023-01-28 07:06:23,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:23,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 07:06:23,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:23,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 07:06:23,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 07:06:23,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 807 [2023-01-28 07:06:23,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 123 transitions, 646 flow. Second operand has 5 states, 5 states have (on average 313.2) internal successors, (1566), 5 states have internal predecessors, (1566), 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) [2023-01-28 07:06:23,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:23,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 807 [2023-01-28 07:06:23,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:26,704 INFO L130 PetriNetUnfolder]: 26584/39330 cut-off events. [2023-01-28 07:06:26,704 INFO L131 PetriNetUnfolder]: For 24637/24637 co-relation queries the response was YES. [2023-01-28 07:06:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107221 conditions, 39330 events. 26584/39330 cut-off events. For 24637/24637 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 245415 event pairs, 16306 based on Foata normal form. 47/33976 useless extension candidates. Maximal degree in co-relation 107207. Up to 34192 conditions per place. [2023-01-28 07:06:27,031 INFO L137 encePairwiseOnDemand]: 792/807 looper letters, 133 selfloop transitions, 35 changer transitions 3/174 dead transitions. [2023-01-28 07:06:27,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 174 transitions, 1195 flow [2023-01-28 07:06:27,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:06:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:06:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1353 transitions. [2023-01-28 07:06:27,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4191449814126394 [2023-01-28 07:06:27,034 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1353 transitions. [2023-01-28 07:06:27,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1353 transitions. [2023-01-28 07:06:27,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:27,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1353 transitions. [2023-01-28 07:06:27,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 338.25) internal successors, (1353), 4 states have internal predecessors, (1353), 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) [2023-01-28 07:06:27,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 807.0) internal successors, (4035), 5 states have internal predecessors, (4035), 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) [2023-01-28 07:06:27,041 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 807.0) internal successors, (4035), 5 states have internal predecessors, (4035), 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) [2023-01-28 07:06:27,041 INFO L175 Difference]: Start difference. First operand has 85 places, 123 transitions, 646 flow. Second operand 4 states and 1353 transitions. [2023-01-28 07:06:27,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 174 transitions, 1195 flow [2023-01-28 07:06:27,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 174 transitions, 1151 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:06:27,128 INFO L231 Difference]: Finished difference. Result has 88 places, 139 transitions, 881 flow [2023-01-28 07:06:27,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=881, PETRI_PLACES=88, PETRI_TRANSITIONS=139} [2023-01-28 07:06:27,129 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 22 predicate places. [2023-01-28 07:06:27,129 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 139 transitions, 881 flow [2023-01-28 07:06:27,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.2) internal successors, (1566), 5 states have internal predecessors, (1566), 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) [2023-01-28 07:06:27,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:27,130 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 07:06:27,130 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:27,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:27,130 INFO L85 PathProgramCache]: Analyzing trace with hash -925939042, now seen corresponding path program 1 times [2023-01-28 07:06:27,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:27,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938899127] [2023-01-28 07:06:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 07:06:27,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:27,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938899127] [2023-01-28 07:06:27,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938899127] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:27,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:06:27,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 07:06:27,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700787497] [2023-01-28 07:06:27,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:27,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 07:06:27,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:27,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 07:06:27,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-01-28 07:06:27,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 807 [2023-01-28 07:06:27,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 139 transitions, 881 flow. Second operand has 9 states, 9 states have (on average 295.8888888888889) internal successors, (2663), 9 states have internal predecessors, (2663), 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) [2023-01-28 07:06:27,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:27,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 807 [2023-01-28 07:06:27,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:06:36,438 INFO L130 PetriNetUnfolder]: 59820/87744 cut-off events. [2023-01-28 07:06:36,438 INFO L131 PetriNetUnfolder]: For 78807/78807 co-relation queries the response was YES. [2023-01-28 07:06:36,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252052 conditions, 87744 events. 59820/87744 cut-off events. For 78807/78807 co-relation queries the response was YES. Maximal size of possible extension queue 1756. Compared 606831 event pairs, 17298 based on Foata normal form. 84/74546 useless extension candidates. Maximal degree in co-relation 252036. Up to 38561 conditions per place. [2023-01-28 07:06:36,937 INFO L137 encePairwiseOnDemand]: 776/807 looper letters, 668 selfloop transitions, 148 changer transitions 35/854 dead transitions. [2023-01-28 07:06:36,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 854 transitions, 6022 flow [2023-01-28 07:06:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 07:06:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 07:06:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 6203 transitions. [2023-01-28 07:06:36,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045522728754973 [2023-01-28 07:06:36,949 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 6203 transitions. [2023-01-28 07:06:36,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 6203 transitions. [2023-01-28 07:06:36,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:06:36,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 6203 transitions. [2023-01-28 07:06:36,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 326.4736842105263) internal successors, (6203), 19 states have internal predecessors, (6203), 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) [2023-01-28 07:06:36,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 807.0) internal successors, (16140), 20 states have internal predecessors, (16140), 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) [2023-01-28 07:06:36,977 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 807.0) internal successors, (16140), 20 states have internal predecessors, (16140), 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) [2023-01-28 07:06:36,978 INFO L175 Difference]: Start difference. First operand has 88 places, 139 transitions, 881 flow. Second operand 19 states and 6203 transitions. [2023-01-28 07:06:36,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 854 transitions, 6022 flow [2023-01-28 07:06:37,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 854 transitions, 6021 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:06:37,150 INFO L231 Difference]: Finished difference. Result has 121 places, 271 transitions, 2384 flow [2023-01-28 07:06:37,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2384, PETRI_PLACES=121, PETRI_TRANSITIONS=271} [2023-01-28 07:06:37,151 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 55 predicate places. [2023-01-28 07:06:37,151 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 271 transitions, 2384 flow [2023-01-28 07:06:37,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 295.8888888888889) internal successors, (2663), 9 states have internal predecessors, (2663), 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) [2023-01-28 07:06:37,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:06:37,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:06:37,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-28 07:06:37,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:06:37,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:06:37,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1239968170, now seen corresponding path program 2 times [2023-01-28 07:06:37,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:06:37,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140127463] [2023-01-28 07:06:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:06:37,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:06:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:06:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:06:38,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:06:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140127463] [2023-01-28 07:06:38,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140127463] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:06:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196368863] [2023-01-28 07:06:38,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 07:06:38,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:06:38,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:06:38,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:06:38,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 07:06:38,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 07:06:38,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 07:06:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 07:06:38,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:06:38,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-01-28 07:06:38,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 07:06:38,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 07:06:38,762 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-01-28 07:06:38,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2023-01-28 07:06:38,852 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 07:06:38,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2023-01-28 07:06:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 07:06:38,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 07:06:38,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196368863] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:06:38,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 07:06:38,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 18 [2023-01-28 07:06:38,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322373442] [2023-01-28 07:06:38,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:06:38,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 07:06:38,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:06:38,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 07:06:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-01-28 07:06:38,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 807 [2023-01-28 07:06:38,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 271 transitions, 2384 flow. Second operand has 8 states, 8 states have (on average 306.25) internal successors, (2450), 8 states have internal predecessors, (2450), 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) [2023-01-28 07:06:38,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:06:38,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 807 [2023-01-28 07:06:38,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:07:02,491 INFO L130 PetriNetUnfolder]: 125683/181447 cut-off events. [2023-01-28 07:07:02,492 INFO L131 PetriNetUnfolder]: For 554690/554690 co-relation queries the response was YES. [2023-01-28 07:07:03,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687461 conditions, 181447 events. 125683/181447 cut-off events. For 554690/554690 co-relation queries the response was YES. Maximal size of possible extension queue 3459. Compared 1319195 event pairs, 17191 based on Foata normal form. 156/156438 useless extension candidates. Maximal degree in co-relation 687429. Up to 75772 conditions per place. [2023-01-28 07:07:04,319 INFO L137 encePairwiseOnDemand]: 786/807 looper letters, 543 selfloop transitions, 159 changer transitions 17/722 dead transitions. [2023-01-28 07:07:04,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 722 transitions, 6541 flow [2023-01-28 07:07:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 07:07:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 07:07:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3700 transitions. [2023-01-28 07:07:04,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416807480004506 [2023-01-28 07:07:04,325 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3700 transitions. [2023-01-28 07:07:04,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3700 transitions. [2023-01-28 07:07:04,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:07:04,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3700 transitions. [2023-01-28 07:07:04,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 336.3636363636364) internal successors, (3700), 11 states have internal predecessors, (3700), 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) [2023-01-28 07:07:04,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 807.0) internal successors, (9684), 12 states have internal predecessors, (9684), 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) [2023-01-28 07:07:04,340 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 807.0) internal successors, (9684), 12 states have internal predecessors, (9684), 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) [2023-01-28 07:07:04,340 INFO L175 Difference]: Start difference. First operand has 121 places, 271 transitions, 2384 flow. Second operand 11 states and 3700 transitions. [2023-01-28 07:07:04,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 722 transitions, 6541 flow [2023-01-28 07:07:08,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 722 transitions, 6341 flow, removed 100 selfloop flow, removed 0 redundant places. [2023-01-28 07:07:08,631 INFO L231 Difference]: Finished difference. Result has 140 places, 358 transitions, 3819 flow [2023-01-28 07:07:08,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3819, PETRI_PLACES=140, PETRI_TRANSITIONS=358} [2023-01-28 07:07:08,632 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2023-01-28 07:07:08,632 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 358 transitions, 3819 flow [2023-01-28 07:07:08,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 306.25) internal successors, (2450), 8 states have internal predecessors, (2450), 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) [2023-01-28 07:07:08,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:07:08,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:07:08,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 07:07:08,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:07:08,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:07:08,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:07:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash -394421534, now seen corresponding path program 3 times [2023-01-28 07:07:08,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:07:08,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363768807] [2023-01-28 07:07:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:07:08,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:07:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:07:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 07:07:09,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:07:09,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363768807] [2023-01-28 07:07:09,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363768807] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:07:09,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:07:09,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 07:07:09,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485727965] [2023-01-28 07:07:09,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:07:09,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 07:07:09,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:07:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 07:07:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-28 07:07:09,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 807 [2023-01-28 07:07:09,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 358 transitions, 3819 flow. Second operand has 9 states, 9 states have (on average 293.8888888888889) internal successors, (2645), 9 states have internal predecessors, (2645), 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) [2023-01-28 07:07:09,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:07:09,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 807 [2023-01-28 07:07:09,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:07:40,882 INFO L130 PetriNetUnfolder]: 146113/211600 cut-off events. [2023-01-28 07:07:40,882 INFO L131 PetriNetUnfolder]: For 933237/933237 co-relation queries the response was YES. [2023-01-28 07:07:42,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864304 conditions, 211600 events. 146113/211600 cut-off events. For 933237/933237 co-relation queries the response was YES. Maximal size of possible extension queue 4086. Compared 1593609 event pairs, 65212 based on Foata normal form. 84/186350 useless extension candidates. Maximal degree in co-relation 864262. Up to 168168 conditions per place. [2023-01-28 07:07:43,502 INFO L137 encePairwiseOnDemand]: 777/807 looper letters, 535 selfloop transitions, 198 changer transitions 18/754 dead transitions. [2023-01-28 07:07:43,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 754 transitions, 7900 flow [2023-01-28 07:07:43,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 07:07:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 07:07:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3589 transitions. [2023-01-28 07:07:43,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40430325560437086 [2023-01-28 07:07:43,508 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3589 transitions. [2023-01-28 07:07:43,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3589 transitions. [2023-01-28 07:07:43,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:07:43,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3589 transitions. [2023-01-28 07:07:43,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 326.27272727272725) internal successors, (3589), 11 states have internal predecessors, (3589), 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) [2023-01-28 07:07:43,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 807.0) internal successors, (9684), 12 states have internal predecessors, (9684), 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) [2023-01-28 07:07:43,523 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 807.0) internal successors, (9684), 12 states have internal predecessors, (9684), 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) [2023-01-28 07:07:43,523 INFO L175 Difference]: Start difference. First operand has 140 places, 358 transitions, 3819 flow. Second operand 11 states and 3589 transitions. [2023-01-28 07:07:43,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 754 transitions, 7900 flow [2023-01-28 07:07:55,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 754 transitions, 7807 flow, removed 46 selfloop flow, removed 1 redundant places. [2023-01-28 07:07:55,542 INFO L231 Difference]: Finished difference. Result has 157 places, 438 transitions, 5348 flow [2023-01-28 07:07:55,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5348, PETRI_PLACES=157, PETRI_TRANSITIONS=438} [2023-01-28 07:07:55,543 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 91 predicate places. [2023-01-28 07:07:55,543 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 438 transitions, 5348 flow [2023-01-28 07:07:55,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 293.8888888888889) internal successors, (2645), 9 states have internal predecessors, (2645), 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) [2023-01-28 07:07:55,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:07:55,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:07:55,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-28 07:07:55,545 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:07:55,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:07:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 422730972, now seen corresponding path program 4 times [2023-01-28 07:07:55,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:07:55,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134904893] [2023-01-28 07:07:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:07:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:07:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:07:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 07:07:56,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:07:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134904893] [2023-01-28 07:07:56,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134904893] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:07:56,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:07:56,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 07:07:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946427484] [2023-01-28 07:07:56,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:07:56,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 07:07:56,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:07:56,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 07:07:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-01-28 07:07:56,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 807 [2023-01-28 07:07:56,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 438 transitions, 5348 flow. Second operand has 9 states, 9 states have (on average 295.8888888888889) internal successors, (2663), 9 states have internal predecessors, (2663), 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) [2023-01-28 07:07:56,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:07:56,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 807 [2023-01-28 07:07:56,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:08:58,683 INFO L130 PetriNetUnfolder]: 273505/394132 cut-off events. [2023-01-28 07:08:58,683 INFO L131 PetriNetUnfolder]: For 1966006/1966006 co-relation queries the response was YES. [2023-01-28 07:09:02,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696411 conditions, 394132 events. 273505/394132 cut-off events. For 1966006/1966006 co-relation queries the response was YES. Maximal size of possible extension queue 7635. Compared 3146002 event pairs, 70639 based on Foata normal form. 84/345915 useless extension candidates. Maximal degree in co-relation 1696361. Up to 216318 conditions per place. [2023-01-28 07:09:03,960 INFO L137 encePairwiseOnDemand]: 779/807 looper letters, 1035 selfloop transitions, 461 changer transitions 41/1540 dead transitions. [2023-01-28 07:09:03,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 1540 transitions, 17611 flow [2023-01-28 07:09:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 07:09:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 07:09:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 6611 transitions. [2023-01-28 07:09:03,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40960346964064437 [2023-01-28 07:09:03,967 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 6611 transitions. [2023-01-28 07:09:03,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 6611 transitions. [2023-01-28 07:09:03,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:09:03,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 6611 transitions. [2023-01-28 07:09:03,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 330.55) internal successors, (6611), 20 states have internal predecessors, (6611), 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) [2023-01-28 07:09:04,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 807.0) internal successors, (16947), 21 states have internal predecessors, (16947), 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) [2023-01-28 07:09:04,125 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 807.0) internal successors, (16947), 21 states have internal predecessors, (16947), 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) [2023-01-28 07:09:04,125 INFO L175 Difference]: Start difference. First operand has 157 places, 438 transitions, 5348 flow. Second operand 20 states and 6611 transitions. [2023-01-28 07:09:04,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 1540 transitions, 17611 flow [2023-01-28 07:09:37,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 1540 transitions, 17481 flow, removed 65 selfloop flow, removed 0 redundant places. [2023-01-28 07:09:37,561 INFO L231 Difference]: Finished difference. Result has 192 places, 782 transitions, 12000 flow [2023-01-28 07:09:37,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=807, PETRI_DIFFERENCE_MINUEND_FLOW=5282, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12000, PETRI_PLACES=192, PETRI_TRANSITIONS=782} [2023-01-28 07:09:37,562 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 126 predicate places. [2023-01-28 07:09:37,562 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 782 transitions, 12000 flow [2023-01-28 07:09:37,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 295.8888888888889) internal successors, (2663), 9 states have internal predecessors, (2663), 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) [2023-01-28 07:09:37,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:09:37,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:09:37,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-28 07:09:37,563 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:09:37,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:09:37,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1773222374, now seen corresponding path program 5 times [2023-01-28 07:09:37,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:09:37,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565385353] [2023-01-28 07:09:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:09:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:09:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:09:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 07:09:38,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:09:38,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565385353] [2023-01-28 07:09:38,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565385353] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:09:38,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:09:38,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 07:09:38,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753737163] [2023-01-28 07:09:38,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:09:38,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 07:09:38,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:09:38,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 07:09:38,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-01-28 07:09:38,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 807 [2023-01-28 07:09:38,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 782 transitions, 12000 flow. Second operand has 9 states, 9 states have (on average 293.8888888888889) internal successors, (2645), 9 states have internal predecessors, (2645), 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) [2023-01-28 07:09:38,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:09:38,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 807 [2023-01-28 07:09:38,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand