./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:34:25,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:34:25,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:34:25,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:34:25,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:34:25,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:34:25,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:34:25,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:34:25,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:34:25,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:34:25,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:34:25,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:34:25,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:34:25,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:34:25,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:34:25,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:34:25,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:34:25,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:34:25,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:34:25,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:34:25,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:34:25,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:34:25,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:34:25,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:34:25,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:34:25,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:34:25,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:34:25,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:34:25,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:34:25,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:34:25,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:34:25,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:34:25,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:34:25,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:34:25,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:34:25,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:34:25,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:34:25,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:34:25,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:34:25,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:34:25,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:34:25,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:34:25,394 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:34:25,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:34:25,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:34:25,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:34:25,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:34:25,396 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:34:25,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:34:25,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:34:25,398 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:34:25,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:34:25,399 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:34:25,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:34:25,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:34:25,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:34:25,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:34:25,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:34:25,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:34:25,400 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:34:25,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:34:25,401 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:34:25,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:34:25,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:34:25,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:34:25,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:34:25,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:34:25,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:34:25,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:34:25,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:34:25,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:34:25,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:34:25,403 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:34:25,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:34:25,403 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:34:25,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:34:25,404 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:34:25,404 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:34:25,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:34:25,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:34:25,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:34:25,750 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:34:25,750 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:34:25,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-30 23:34:26,838 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:34:27,208 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:34:27,208 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-30 23:34:27,230 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0503f2ca8/3e98c90cbf8740a7aa0a1c26c0cba105/FLAG2644f2852 [2023-08-30 23:34:27,248 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0503f2ca8/3e98c90cbf8740a7aa0a1c26c0cba105 [2023-08-30 23:34:27,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:34:27,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:34:27,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:34:27,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:34:27,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:34:27,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:34:27" (1/1) ... [2023-08-30 23:34:27,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513d2b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:27, skipping insertion in model container [2023-08-30 23:34:27,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:34:27" (1/1) ... [2023-08-30 23:34:27,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:34:27,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:34:27,860 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] [2023-08-30 23:34:27,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:34:27,877 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:34:27,928 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] [2023-08-30 23:34:27,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:34:28,046 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:34:28,047 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:34:28,053 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:34:28,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28 WrapperNode [2023-08-30 23:34:28,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:34:28,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:34:28,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:34:28,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:34:28,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,151 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 283 [2023-08-30 23:34:28,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:34:28,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:34:28,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:34:28,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:34:28,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,202 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:34:28,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:34:28,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:34:28,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:34:28,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (1/1) ... [2023-08-30 23:34:28,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:34:28,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:34:28,250 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) [2023-08-30 23:34:28,260 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 [2023-08-30 23:34:28,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 23:34:28,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:34:28,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 23:34:28,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 23:34:28,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:34:28,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-08-30 23:34:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-08-30 23:34:28,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:34:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:34:28,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:34:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:34:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:34:28,290 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 23:34:28,612 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:34:28,613 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:34:28,917 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:34:28,983 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:34:28,983 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-30 23:34:28,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:34:28 BoogieIcfgContainer [2023-08-30 23:34:28,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:34:28,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:34:28,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:34:28,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:34:28,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:34:27" (1/3) ... [2023-08-30 23:34:28,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87e088d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:34:28, skipping insertion in model container [2023-08-30 23:34:28,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:34:28" (2/3) ... [2023-08-30 23:34:28,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87e088d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:34:28, skipping insertion in model container [2023-08-30 23:34:28,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:34:28" (3/3) ... [2023-08-30 23:34:28,993 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-08-30 23:34:29,000 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:34:29,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:34:29,007 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 23:34:29,007 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:34:29,115 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 23:34:29,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 248 transitions, 504 flow [2023-08-30 23:34:29,264 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2023-08-30 23:34:29,264 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 23:34:29,271 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. [2023-08-30 23:34:29,272 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 248 transitions, 504 flow [2023-08-30 23:34:29,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 243 transitions, 491 flow [2023-08-30 23:34:29,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:34:29,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 243 transitions, 491 flow [2023-08-30 23:34:29,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 243 transitions, 491 flow [2023-08-30 23:34:29,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 243 transitions, 491 flow [2023-08-30 23:34:29,346 INFO L130 PetriNetUnfolder]: 18/257 cut-off events. [2023-08-30 23:34:29,346 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:34:29,350 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. [2023-08-30 23:34:29,354 INFO L119 LiptonReduction]: Number of co-enabled transitions 6520 [2023-08-30 23:34:35,838 INFO L134 LiptonReduction]: Checked pairs total: 6702 [2023-08-30 23:34:35,839 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-08-30 23:34:35,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:34:35,862 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=true, 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;@202412db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:34:35,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 23:34:35,869 INFO L130 PetriNetUnfolder]: 1/14 cut-off events. [2023-08-30 23:34:35,869 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:34:35,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:34:35,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-30 23:34:35,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:34:35,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:34:35,876 INFO L85 PathProgramCache]: Analyzing trace with hash -775278274, now seen corresponding path program 1 times [2023-08-30 23:34:35,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:34:35,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427136614] [2023-08-30 23:34:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:34:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:34:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:34:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:34:36,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:34:36,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427136614] [2023-08-30 23:34:36,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427136614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:34:36,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:34:36,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:34:36,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762126150] [2023-08-30 23:34:36,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:34:36,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:34:36,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:34:36,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:34:36,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:34:36,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 490 [2023-08-30 23:34:36,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 79 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) [2023-08-30 23:34:36,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:34:36,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 490 [2023-08-30 23:34:36,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:34:36,410 INFO L130 PetriNetUnfolder]: 82/169 cut-off events. [2023-08-30 23:34:36,410 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:34:36,411 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. [2023-08-30 23:34:36,413 INFO L137 encePairwiseOnDemand]: 483/490 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-30 23:34:36,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 139 flow [2023-08-30 23:34:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:34:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:34:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-08-30 23:34:36,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850340136054422 [2023-08-30 23:34:36,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-08-30 23:34:36,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-08-30 23:34:36,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:34:36,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-08-30 23:34:36,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 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) [2023-08-30 23:34:36,455 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) [2023-08-30 23:34:36,456 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) [2023-08-30 23:34:36,458 INFO L175 Difference]: Start difference. First operand has 30 places, 37 transitions, 79 flow. Second operand 3 states and 713 transitions. [2023-08-30 23:34:36,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 139 flow [2023-08-30 23:34:36,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:34:36,462 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 83 flow [2023-08-30 23:34:36,463 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=83, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2023-08-30 23:34:36,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-30 23:34:36,467 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 83 flow [2023-08-30 23:34:36,467 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) [2023-08-30 23:34:36,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:34:36,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:34:36,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:34:36,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:34:36,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:34:36,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1198421338, now seen corresponding path program 1 times [2023-08-30 23:34:36,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:34:36,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624534402] [2023-08-30 23:34:36,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:34:36,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:34:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:34:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:34:36,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:34:36,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624534402] [2023-08-30 23:34:36,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624534402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:34:36,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549454585] [2023-08-30 23:34:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:34:36,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:34:36,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:34:36,649 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) [2023-08-30 23:34:36,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 23:34:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:34:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 23:34:36,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:34:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:34:36,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 23:34:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:34:36,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549454585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 23:34:36,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 23:34:36,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 23:34:36,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45297879] [2023-08-30 23:34:36,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 23:34:36,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 23:34:36,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:34:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 23:34:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-30 23:34:36,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 490 [2023-08-30 23:34:36,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 83 flow. Second operand has 8 states, 8 states have (on average 224.5) internal successors, (1796), 8 states have internal predecessors, (1796), 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) [2023-08-30 23:34:36,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:34:36,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 490 [2023-08-30 23:34:36,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:34:37,012 INFO L130 PetriNetUnfolder]: 82/170 cut-off events. [2023-08-30 23:34:37,013 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:34:37,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 170 events. 82/170 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. 0/120 useless extension candidates. Maximal degree in co-relation 341. Up to 167 conditions per place. [2023-08-30 23:34:37,015 INFO L137 encePairwiseOnDemand]: 487/490 looper letters, 31 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-30 23:34:37,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 155 flow [2023-08-30 23:34:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:34:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:34:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 927 transitions. [2023-08-30 23:34:37,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4729591836734694 [2023-08-30 23:34:37,018 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 927 transitions. [2023-08-30 23:34:37,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 927 transitions. [2023-08-30 23:34:37,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:34:37,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 927 transitions. [2023-08-30 23:34:37,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 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) [2023-08-30 23:34:37,025 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) [2023-08-30 23:34:37,026 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) [2023-08-30 23:34:37,026 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 83 flow. Second operand 4 states and 927 transitions. [2023-08-30 23:34:37,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 155 flow [2023-08-30 23:34:37,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 23:34:37,028 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2023-08-30 23:34:37,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-30 23:34:37,029 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 23:34:37,029 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2023-08-30 23:34:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 224.5) internal successors, (1796), 8 states have internal predecessors, (1796), 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) [2023-08-30 23:34:37,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:34:37,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 23:34:37,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 23:34:37,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:34:37,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:34:37,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:34:37,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1430954434, now seen corresponding path program 2 times [2023-08-30 23:34:37,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:34:37,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528365495] [2023-08-30 23:34:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:34:37,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:34:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:34:37,274 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:34:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:34:37,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:34:37,330 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:34:37,331 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 23:34:37,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 23:34:37,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 23:34:37,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:34:37,332 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-30 23:34:37,334 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:34:37,334 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 23:34:37,410 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 23:34:37,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 413 transitions, 844 flow [2023-08-30 23:34:37,504 INFO L130 PetriNetUnfolder]: 36/463 cut-off events. [2023-08-30 23:34:37,504 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 23:34:37,510 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. [2023-08-30 23:34:37,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 388 places, 413 transitions, 844 flow [2023-08-30 23:34:37,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 388 places, 413 transitions, 844 flow [2023-08-30 23:34:37,514 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:34:37,515 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 388 places, 413 transitions, 844 flow [2023-08-30 23:34:37,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 388 places, 413 transitions, 844 flow [2023-08-30 23:34:37,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 413 transitions, 844 flow [2023-08-30 23:34:37,577 INFO L130 PetriNetUnfolder]: 36/463 cut-off events. [2023-08-30 23:34:37,577 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 23:34:37,583 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. [2023-08-30 23:34:37,626 INFO L119 LiptonReduction]: Number of co-enabled transitions 69764 [2023-08-30 23:34:46,316 INFO L134 LiptonReduction]: Checked pairs total: 82796 [2023-08-30 23:34:46,316 INFO L136 LiptonReduction]: Total number of compositions: 396 [2023-08-30 23:34:46,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:34:46,318 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=true, 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;@202412db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:34:46,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:34:46,321 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2023-08-30 23:34:46,321 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:34:46,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:34:46,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:34:46,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:34:46,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:34:46,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2086585592, now seen corresponding path program 1 times [2023-08-30 23:34:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:34:46,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546364315] [2023-08-30 23:34:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:34:46,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:34:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:34:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:34:46,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:34:46,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546364315] [2023-08-30 23:34:46,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546364315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:34:46,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:34:46,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:34:46,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209216321] [2023-08-30 23:34:46,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:34:46,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:34:46,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:34:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:34:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:34:46,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 809 [2023-08-30 23:34:46,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 81 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 377.6666666666667) internal successors, (1133), 3 states have internal predecessors, (1133), 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) [2023-08-30 23:34:46,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:34:46,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 809 [2023-08-30 23:34:46,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:34:47,539 INFO L130 PetriNetUnfolder]: 8425/12461 cut-off events. [2023-08-30 23:34:47,539 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2023-08-30 23:34:47,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24907 conditions, 12461 events. 8425/12461 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 68317 event pairs, 6567 based on Foata normal form. 0/9028 useless extension candidates. Maximal degree in co-relation 20102. Up to 12304 conditions per place. [2023-08-30 23:34:47,612 INFO L137 encePairwiseOnDemand]: 801/809 looper letters, 71 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-30 23:34:47,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 318 flow [2023-08-30 23:34:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:34:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:34:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1204 transitions. [2023-08-30 23:34:47,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496085702513391 [2023-08-30 23:34:47,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1204 transitions. [2023-08-30 23:34:47,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1204 transitions. [2023-08-30 23:34:47,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:34:47,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1204 transitions. [2023-08-30 23:34:47,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 401.3333333333333) internal successors, (1204), 3 states have internal predecessors, (1204), 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) [2023-08-30 23:34:47,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 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) [2023-08-30 23:34:47,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 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) [2023-08-30 23:34:47,627 INFO L175 Difference]: Start difference. First operand has 66 places, 81 transitions, 180 flow. Second operand 3 states and 1204 transitions. [2023-08-30 23:34:47,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 318 flow [2023-08-30 23:34:47,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:34:47,630 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 182 flow [2023-08-30 23:34:47,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=809, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-08-30 23:34:47,631 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-30 23:34:47,631 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 182 flow [2023-08-30 23:34:47,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 377.6666666666667) internal successors, (1133), 3 states have internal predecessors, (1133), 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) [2023-08-30 23:34:47,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:34:47,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:34:47,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:34:47,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:34:47,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:34:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash -21146749, now seen corresponding path program 1 times [2023-08-30 23:34:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:34:47,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50881937] [2023-08-30 23:34:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:34:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:34:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:34:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 23:34:47,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:34:47,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50881937] [2023-08-30 23:34:47,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50881937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:34:47,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:34:47,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:34:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015895047] [2023-08-30 23:34:47,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:34:47,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:34:47,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:34:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:34:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:34:47,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 809 [2023-08-30 23:34:47,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 379.6666666666667) internal successors, (1139), 3 states have internal predecessors, (1139), 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) [2023-08-30 23:34:47,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:34:47,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 809 [2023-08-30 23:34:47,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:34:49,316 INFO L130 PetriNetUnfolder]: 12502/18300 cut-off events. [2023-08-30 23:34:49,317 INFO L131 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2023-08-30 23:34:49,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36690 conditions, 18300 events. 12502/18300 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 103723 event pairs, 6567 based on Foata normal form. 0/13316 useless extension candidates. Maximal degree in co-relation 36677. Up to 12154 conditions per place. [2023-08-30 23:34:49,404 INFO L137 encePairwiseOnDemand]: 805/809 looper letters, 122 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2023-08-30 23:34:49,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 129 transitions, 544 flow [2023-08-30 23:34:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:34:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:34:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1253 transitions. [2023-08-30 23:34:49,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162752369180058 [2023-08-30 23:34:49,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1253 transitions. [2023-08-30 23:34:49,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1253 transitions. [2023-08-30 23:34:49,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:34:49,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1253 transitions. [2023-08-30 23:34:49,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 417.6666666666667) internal successors, (1253), 3 states have internal predecessors, (1253), 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) [2023-08-30 23:34:49,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 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) [2023-08-30 23:34:49,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 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) [2023-08-30 23:34:49,417 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 182 flow. Second operand 3 states and 1253 transitions. [2023-08-30 23:34:49,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 129 transitions, 544 flow [2023-08-30 23:34:49,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 540 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 23:34:49,423 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 204 flow [2023-08-30 23:34:49,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=809, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2023-08-30 23:34:49,425 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2023-08-30 23:34:49,425 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 204 flow [2023-08-30 23:34:49,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 379.6666666666667) internal successors, (1139), 3 states have internal predecessors, (1139), 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) [2023-08-30 23:34:49,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:34:49,426 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:34:49,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:34:49,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:34:49,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:34:49,427 INFO L85 PathProgramCache]: Analyzing trace with hash -190819178, now seen corresponding path program 1 times [2023-08-30 23:34:49,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:34:49,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644957312] [2023-08-30 23:34:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:34:49,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:34:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:34:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:34:49,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:34:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644957312] [2023-08-30 23:34:49,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644957312] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:34:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063636696] [2023-08-30 23:34:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:34:49,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:34:49,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:34:49,522 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) [2023-08-30 23:34:49,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 23:34:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:34:49,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 23:34:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:34:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:34:49,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 23:34:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:34:49,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063636696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 23:34:49,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 23:34:49,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 23:34:49,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349554153] [2023-08-30 23:34:49,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 23:34:49,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 23:34:49,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:34:49,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 23:34:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-30 23:34:49,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 809 [2023-08-30 23:34:49,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 374.625) internal successors, (2997), 8 states have internal predecessors, (2997), 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) [2023-08-30 23:34:49,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:34:49,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 809 [2023-08-30 23:34:49,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:34:51,139 INFO L130 PetriNetUnfolder]: 12502/18373 cut-off events. [2023-08-30 23:34:51,139 INFO L131 PetriNetUnfolder]: For 1578/1578 co-relation queries the response was YES. [2023-08-30 23:34:51,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38274 conditions, 18373 events. 12502/18373 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 102847 event pairs, 9747 based on Foata normal form. 0/13830 useless extension candidates. Maximal degree in co-relation 38253. Up to 18193 conditions per place. [2023-08-30 23:34:51,241 INFO L137 encePairwiseOnDemand]: 806/809 looper letters, 74 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-30 23:34:51,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 362 flow [2023-08-30 23:34:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:34:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:34:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1567 transitions. [2023-08-30 23:34:51,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4842398022249691 [2023-08-30 23:34:51,247 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1567 transitions. [2023-08-30 23:34:51,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1567 transitions. [2023-08-30 23:34:51,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:34:51,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1567 transitions. [2023-08-30 23:34:51,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 391.75) internal successors, (1567), 4 states have internal predecessors, (1567), 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) [2023-08-30 23:34:51,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 809.0) internal successors, (4045), 5 states have internal predecessors, (4045), 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) [2023-08-30 23:34:51,261 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 809.0) internal successors, (4045), 5 states have internal predecessors, (4045), 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) [2023-08-30 23:34:51,261 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 204 flow. Second operand 4 states and 1567 transitions. [2023-08-30 23:34:51,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 362 flow [2023-08-30 23:34:51,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:34:51,290 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 214 flow [2023-08-30 23:34:51,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=809, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-08-30 23:34:51,291 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2023-08-30 23:34:51,291 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 214 flow [2023-08-30 23:34:51,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 374.625) internal successors, (2997), 8 states have internal predecessors, (2997), 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) [2023-08-30 23:34:51,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:34:51,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 23:34:51,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 23:34:51,501 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,SelfDestructingSolverStorable5 [2023-08-30 23:34:51,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:34:51,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:34:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1757769597, now seen corresponding path program 2 times [2023-08-30 23:34:51,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:34:51,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740239489] [2023-08-30 23:34:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:34:51,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:34:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:34:51,528 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:34:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:34:51,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:34:51,553 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:34:51,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 23:34:51,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 23:34:51,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 23:34:51,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 23:34:51,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 23:34:51,555 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-08-30 23:34:51,555 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:34:51,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 23:34:51,624 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 23:34:51,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 578 transitions, 1186 flow [2023-08-30 23:34:51,769 INFO L130 PetriNetUnfolder]: 58/691 cut-off events. [2023-08-30 23:34:51,769 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 23:34:51,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 691 events. 58/691 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2904 event pairs, 1 based on Foata normal form. 0/626 useless extension candidates. Maximal degree in co-relation 549. Up to 16 conditions per place. [2023-08-30 23:34:51,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 542 places, 578 transitions, 1186 flow [2023-08-30 23:34:51,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 542 places, 578 transitions, 1186 flow [2023-08-30 23:34:51,790 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:34:51,790 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 542 places, 578 transitions, 1186 flow [2023-08-30 23:34:51,790 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 542 places, 578 transitions, 1186 flow [2023-08-30 23:34:51,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 578 transitions, 1186 flow [2023-08-30 23:34:51,927 INFO L130 PetriNetUnfolder]: 58/691 cut-off events. [2023-08-30 23:34:51,927 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 23:34:51,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 691 events. 58/691 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2904 event pairs, 1 based on Foata normal form. 0/626 useless extension candidates. Maximal degree in co-relation 549. Up to 16 conditions per place. [2023-08-30 23:34:51,991 INFO L119 LiptonReduction]: Number of co-enabled transitions 185820 [2023-08-30 23:35:02,585 INFO L134 LiptonReduction]: Checked pairs total: 211500 [2023-08-30 23:35:02,586 INFO L136 LiptonReduction]: Total number of compositions: 551 [2023-08-30 23:35:02,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:35:02,588 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=true, 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;@202412db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:35:02,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 23:35:02,591 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2023-08-30 23:35:02,591 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:35:02,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:35:02,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:35:02,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:35:02,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:35:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1655510194, now seen corresponding path program 1 times [2023-08-30 23:35:02,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:35:02,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524301607] [2023-08-30 23:35:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:35:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:35:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:35:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:35:02,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:35:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524301607] [2023-08-30 23:35:02,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524301607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:35:02,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:35:02,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:35:02,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781325873] [2023-08-30 23:35:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:35:02,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 23:35:02,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:35:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 23:35:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 23:35:02,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 1129 [2023-08-30 23:35:02,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 534.0) internal successors, (1068), 2 states have internal predecessors, (1068), 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) [2023-08-30 23:35:02,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:35:02,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 1129 [2023-08-30 23:35:02,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:35:29,739 INFO L130 PetriNetUnfolder]: 332985/433382 cut-off events. [2023-08-30 23:35:29,739 INFO L131 PetriNetUnfolder]: For 9466/9466 co-relation queries the response was YES. [2023-08-30 23:35:30,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870688 conditions, 433382 events. 332985/433382 cut-off events. For 9466/9466 co-relation queries the response was YES. Maximal size of possible extension queue 7295. Compared 2708815 event pairs, 262039 based on Foata normal form. 0/318876 useless extension candidates. Maximal degree in co-relation 188798. Up to 432539 conditions per place. [2023-08-30 23:35:31,604 INFO L137 encePairwiseOnDemand]: 1120/1129 looper letters, 104 selfloop transitions, 0 changer transitions 0/107 dead transitions. [2023-08-30 23:35:31,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 107 transitions, 452 flow [2023-08-30 23:35:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 23:35:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 23:35:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1173 transitions. [2023-08-30 23:35:31,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194862710363153 [2023-08-30 23:35:31,609 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1173 transitions. [2023-08-30 23:35:31,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1173 transitions. [2023-08-30 23:35:31,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:35:31,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1173 transitions. [2023-08-30 23:35:31,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 586.5) internal successors, (1173), 2 states have internal predecessors, (1173), 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) [2023-08-30 23:35:31,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1129.0) internal successors, (3387), 3 states have internal predecessors, (3387), 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) [2023-08-30 23:35:31,617 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1129.0) internal successors, (3387), 3 states have internal predecessors, (3387), 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) [2023-08-30 23:35:31,617 INFO L175 Difference]: Start difference. First operand has 92 places, 116 transitions, 262 flow. Second operand 2 states and 1173 transitions. [2023-08-30 23:35:31,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 107 transitions, 452 flow [2023-08-30 23:35:31,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 107 transitions, 452 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:35:31,621 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 244 flow [2023-08-30 23:35:31,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=244, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2023-08-30 23:35:31,622 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 1 predicate places. [2023-08-30 23:35:31,622 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 244 flow [2023-08-30 23:35:31,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 534.0) internal successors, (1068), 2 states have internal predecessors, (1068), 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) [2023-08-30 23:35:31,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:35:31,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:35:31,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 23:35:31,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:35:31,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:35:31,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1803259507, now seen corresponding path program 1 times [2023-08-30 23:35:31,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:35:31,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813470149] [2023-08-30 23:35:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:35:31,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:35:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:35:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:35:31,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:35:31,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813470149] [2023-08-30 23:35:31,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813470149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:35:31,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:35:31,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:35:31,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816336957] [2023-08-30 23:35:31,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:35:31,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:35:31,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:35:31,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:35:31,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:35:31,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 1129 [2023-08-30 23:35:31,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 529.3333333333334) internal successors, (1588), 3 states have internal predecessors, (1588), 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) [2023-08-30 23:35:31,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:35:31,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 1129 [2023-08-30 23:35:31,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:36:10,718 INFO L130 PetriNetUnfolder]: 492231/638934 cut-off events. [2023-08-30 23:36:10,718 INFO L131 PetriNetUnfolder]: For 13219/13219 co-relation queries the response was YES. [2023-08-30 23:36:11,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283796 conditions, 638934 events. 492231/638934 cut-off events. For 13219/13219 co-relation queries the response was YES. Maximal size of possible extension queue 9103. Compared 4143139 event pairs, 262039 based on Foata normal form. 0/471862 useless extension candidates. Maximal degree in co-relation 1283790. Up to 428661 conditions per place. [2023-08-30 23:36:13,549 INFO L137 encePairwiseOnDemand]: 1125/1129 looper letters, 185 selfloop transitions, 3 changer transitions 0/191 dead transitions. [2023-08-30 23:36:13,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 191 transitions, 806 flow [2023-08-30 23:36:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:36:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:36:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1767 transitions. [2023-08-30 23:36:13,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217006200177148 [2023-08-30 23:36:13,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1767 transitions. [2023-08-30 23:36:13,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1767 transitions. [2023-08-30 23:36:13,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:36:13,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1767 transitions. [2023-08-30 23:36:13,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 589.0) internal successors, (1767), 3 states have internal predecessors, (1767), 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) [2023-08-30 23:36:13,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:36:13,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:36:13,564 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 244 flow. Second operand 3 states and 1767 transitions. [2023-08-30 23:36:13,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 191 transitions, 806 flow [2023-08-30 23:36:13,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 191 transitions, 806 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:36:13,570 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 270 flow [2023-08-30 23:36:13,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2023-08-30 23:36:13,571 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2023-08-30 23:36:13,571 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 270 flow [2023-08-30 23:36:13,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 529.3333333333334) internal successors, (1588), 3 states have internal predecessors, (1588), 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) [2023-08-30 23:36:13,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:36:13,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:36:13,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 23:36:13,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:36:13,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:36:13,573 INFO L85 PathProgramCache]: Analyzing trace with hash 962460702, now seen corresponding path program 1 times [2023-08-30 23:36:13,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:36:13,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955343854] [2023-08-30 23:36:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:36:13,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:36:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:36:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:36:13,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:36:13,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955343854] [2023-08-30 23:36:13,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955343854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:36:13,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:36:13,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:36:13,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767794730] [2023-08-30 23:36:13,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:36:13,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:36:13,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:36:13,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:36:13,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:36:13,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 515 out of 1129 [2023-08-30 23:36:13,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 519.0) internal successors, (1557), 3 states have internal predecessors, (1557), 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) [2023-08-30 23:36:13,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:36:13,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 515 of 1129 [2023-08-30 23:36:13,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:37:05,282 INFO L130 PetriNetUnfolder]: 601322/782909 cut-off events. [2023-08-30 23:37:05,282 INFO L131 PetriNetUnfolder]: For 73644/73644 co-relation queries the response was YES. [2023-08-30 23:37:06,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620835 conditions, 782909 events. 601322/782909 cut-off events. For 73644/73644 co-relation queries the response was YES. Maximal size of possible extension queue 11507. Compared 5199234 event pairs, 352753 based on Foata normal form. 0/600394 useless extension candidates. Maximal degree in co-relation 1620827. Up to 654441 conditions per place. [2023-08-30 23:37:09,137 INFO L137 encePairwiseOnDemand]: 1111/1129 looper letters, 167 selfloop transitions, 17 changer transitions 0/187 dead transitions. [2023-08-30 23:37:09,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 187 transitions, 825 flow [2023-08-30 23:37:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:37:09,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:37:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1724 transitions. [2023-08-30 23:37:09,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5090050191910245 [2023-08-30 23:37:09,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1724 transitions. [2023-08-30 23:37:09,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1724 transitions. [2023-08-30 23:37:09,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:37:09,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1724 transitions. [2023-08-30 23:37:09,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 574.6666666666666) internal successors, (1724), 3 states have internal predecessors, (1724), 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) [2023-08-30 23:37:09,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:37:09,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:37:09,151 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 270 flow. Second operand 3 states and 1724 transitions. [2023-08-30 23:37:09,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 187 transitions, 825 flow [2023-08-30 23:37:11,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 187 transitions, 813 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:37:11,491 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 400 flow [2023-08-30 23:37:11,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2023-08-30 23:37:11,492 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 7 predicate places. [2023-08-30 23:37:11,492 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 400 flow [2023-08-30 23:37:11,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 519.0) internal successors, (1557), 3 states have internal predecessors, (1557), 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) [2023-08-30 23:37:11,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:37:11,493 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 23:37:11,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 23:37:11,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:37:11,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:37:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 698955491, now seen corresponding path program 1 times [2023-08-30 23:37:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:37:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916231612] [2023-08-30 23:37:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:37:11,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:37:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:37:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:37:11,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:37:11,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916231612] [2023-08-30 23:37:11,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916231612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:37:11,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:37:11,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:37:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385461871] [2023-08-30 23:37:11,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:37:11,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:37:11,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:37:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:37:11,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:37:11,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 1129 [2023-08-30 23:37:11,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 527.3333333333334) internal successors, (1582), 3 states have internal predecessors, (1582), 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) [2023-08-30 23:37:11,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:37:11,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 1129 [2023-08-30 23:37:11,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:38:07,803 INFO L130 PetriNetUnfolder]: 601322/783079 cut-off events. [2023-08-30 23:38:07,804 INFO L131 PetriNetUnfolder]: For 163175/163175 co-relation queries the response was YES. [2023-08-30 23:38:09,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794870 conditions, 783079 events. 601322/783079 cut-off events. For 163175/163175 co-relation queries the response was YES. Maximal size of possible extension queue 11514. Compared 5162160 event pairs, 448329 based on Foata normal form. 0/647802 useless extension candidates. Maximal degree in co-relation 1794861. Up to 781524 conditions per place. [2023-08-30 23:38:11,803 INFO L137 encePairwiseOnDemand]: 1126/1129 looper letters, 122 selfloop transitions, 2 changer transitions 0/127 dead transitions. [2023-08-30 23:38:11,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 127 transitions, 650 flow [2023-08-30 23:38:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:38:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:38:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1681 transitions. [2023-08-30 23:38:11,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49630941836433423 [2023-08-30 23:38:11,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1681 transitions. [2023-08-30 23:38:11,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1681 transitions. [2023-08-30 23:38:11,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:38:11,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1681 transitions. [2023-08-30 23:38:11,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 560.3333333333334) internal successors, (1681), 3 states have internal predecessors, (1681), 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) [2023-08-30 23:38:11,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:38:11,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:38:11,816 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 400 flow. Second operand 3 states and 1681 transitions. [2023-08-30 23:38:11,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 127 transitions, 650 flow [2023-08-30 23:38:32,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 616 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:38:32,307 INFO L231 Difference]: Finished difference. Result has 100 places, 127 transitions, 378 flow [2023-08-30 23:38:32,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=378, PETRI_PLACES=100, PETRI_TRANSITIONS=127} [2023-08-30 23:38:32,308 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2023-08-30 23:38:32,308 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 127 transitions, 378 flow [2023-08-30 23:38:32,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 527.3333333333334) internal successors, (1582), 3 states have internal predecessors, (1582), 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) [2023-08-30 23:38:32,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:38:32,309 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:38:32,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 23:38:32,309 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:38:32,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:38:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1296553055, now seen corresponding path program 1 times [2023-08-30 23:38:32,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:38:32,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212535025] [2023-08-30 23:38:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:38:32,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:38:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:38:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:38:32,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:38:32,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212535025] [2023-08-30 23:38:32,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212535025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:38:32,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636824094] [2023-08-30 23:38:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:38:32,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:38:32,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:38:32,400 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) [2023-08-30 23:38:32,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 23:38:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:38:32,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 23:38:32,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:38:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:38:32,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 23:38:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:38:32,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636824094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 23:38:32,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 23:38:32,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 23:38:32,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908525695] [2023-08-30 23:38:32,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 23:38:32,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 23:38:32,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:38:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 23:38:32,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-30 23:38:32,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 523 out of 1129 [2023-08-30 23:38:32,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 127 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 524.8571428571429) internal successors, (3674), 7 states have internal predecessors, (3674), 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) [2023-08-30 23:38:32,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:38:32,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 523 of 1129 [2023-08-30 23:38:32,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:39:29,293 INFO L130 PetriNetUnfolder]: 601322/783080 cut-off events. [2023-08-30 23:39:29,293 INFO L131 PetriNetUnfolder]: For 105476/105476 co-relation queries the response was YES. [2023-08-30 23:39:31,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755980 conditions, 783080 events. 601322/783080 cut-off events. For 105476/105476 co-relation queries the response was YES. Maximal size of possible extension queue 11514. Compared 5162715 event pairs, 448329 based on Foata normal form. 0/642118 useless extension candidates. Maximal degree in co-relation 1755970. Up to 781524 conditions per place. [2023-08-30 23:39:33,633 INFO L137 encePairwiseOnDemand]: 1126/1129 looper letters, 122 selfloop transitions, 3 changer transitions 0/128 dead transitions. [2023-08-30 23:39:33,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 128 transitions, 632 flow [2023-08-30 23:39:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:39:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:39:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2199 transitions. [2023-08-30 23:39:33,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869353410097431 [2023-08-30 23:39:33,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2199 transitions. [2023-08-30 23:39:33,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2199 transitions. [2023-08-30 23:39:33,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:39:33,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2199 transitions. [2023-08-30 23:39:33,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 549.75) internal successors, (2199), 4 states have internal predecessors, (2199), 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) [2023-08-30 23:39:33,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1129.0) internal successors, (5645), 5 states have internal predecessors, (5645), 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) [2023-08-30 23:39:33,646 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1129.0) internal successors, (5645), 5 states have internal predecessors, (5645), 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) [2023-08-30 23:39:33,646 INFO L175 Difference]: Start difference. First operand has 100 places, 127 transitions, 378 flow. Second operand 4 states and 2199 transitions. [2023-08-30 23:39:33,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 128 transitions, 632 flow [2023-08-30 23:39:33,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 128 transitions, 628 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 23:39:33,688 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 390 flow [2023-08-30 23:39:33,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2023-08-30 23:39:33,689 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2023-08-30 23:39:33,689 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 390 flow [2023-08-30 23:39:33,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 524.8571428571429) internal successors, (3674), 7 states have internal predecessors, (3674), 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) [2023-08-30 23:39:33,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:39:33,691 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:39:33,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 23:39:33,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:39:33,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:39:33,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:39:33,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1652758941, now seen corresponding path program 2 times [2023-08-30 23:39:33,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:39:33,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777058035] [2023-08-30 23:39:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:39:33,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:39:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:39:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 23:39:33,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:39:33,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777058035] [2023-08-30 23:39:33,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777058035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:39:33,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864418837] [2023-08-30 23:39:33,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 23:39:33,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:39:33,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:39:33,998 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) [2023-08-30 23:39:34,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 23:39:34,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 23:39:34,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 23:39:34,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 23:39:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:39:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 23:39:34,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 23:39:34,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864418837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:39:34,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 23:39:34,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-08-30 23:39:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633136724] [2023-08-30 23:39:34,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:39:34,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 23:39:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:39:34,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 23:39:34,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 23:39:34,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 520 out of 1129 [2023-08-30 23:39:34,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 390 flow. Second operand has 6 states, 6 states have (on average 522.1666666666666) internal successors, (3133), 6 states have internal predecessors, (3133), 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) [2023-08-30 23:39:34,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:39:34,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 520 of 1129 [2023-08-30 23:39:34,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:40:27,391 INFO L130 PetriNetUnfolder]: 508449/667139 cut-off events. [2023-08-30 23:40:27,391 INFO L131 PetriNetUnfolder]: For 91132/91132 co-relation queries the response was YES. [2023-08-30 23:40:28,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1470797 conditions, 667139 events. 508449/667139 cut-off events. For 91132/91132 co-relation queries the response was YES. Maximal size of possible extension queue 10078. Compared 4624293 event pairs, 60837 based on Foata normal form. 27528/568949 useless extension candidates. Maximal degree in co-relation 1470786. Up to 269982 conditions per place. [2023-08-30 23:40:30,991 INFO L137 encePairwiseOnDemand]: 1122/1129 looper letters, 448 selfloop transitions, 12 changer transitions 6/468 dead transitions. [2023-08-30 23:40:30,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 468 transitions, 2258 flow [2023-08-30 23:40:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 23:40:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 23:40:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3513 transitions. [2023-08-30 23:40:30,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186005314437555 [2023-08-30 23:40:30,996 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3513 transitions. [2023-08-30 23:40:30,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3513 transitions. [2023-08-30 23:40:30,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:40:30,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3513 transitions. [2023-08-30 23:40:31,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 585.5) internal successors, (3513), 6 states have internal predecessors, (3513), 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) [2023-08-30 23:40:31,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1129.0) internal successors, (7903), 7 states have internal predecessors, (7903), 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) [2023-08-30 23:40:31,010 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1129.0) internal successors, (7903), 7 states have internal predecessors, (7903), 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) [2023-08-30 23:40:31,010 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 390 flow. Second operand 6 states and 3513 transitions. [2023-08-30 23:40:31,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 468 transitions, 2258 flow [2023-08-30 23:40:31,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 468 transitions, 2242 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 23:40:31,206 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 419 flow [2023-08-30 23:40:31,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=419, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2023-08-30 23:40:31,207 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 12 predicate places. [2023-08-30 23:40:31,207 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 419 flow [2023-08-30 23:40:31,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 522.1666666666666) internal successors, (3133), 6 states have internal predecessors, (3133), 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) [2023-08-30 23:40:31,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:40:31,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:40:31,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 23:40:31,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:40:31,408 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:40:31,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:40:31,409 INFO L85 PathProgramCache]: Analyzing trace with hash 253686905, now seen corresponding path program 1 times [2023-08-30 23:40:31,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:40:31,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094512549] [2023-08-30 23:40:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:40:31,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:40:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:40:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 23:40:31,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:40:31,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094512549] [2023-08-30 23:40:31,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094512549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:40:31,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:40:31,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:40:31,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893167556] [2023-08-30 23:40:31,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:40:31,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:40:31,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:40:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:40:31,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:40:31,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 515 out of 1129 [2023-08-30 23:40:31,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 419 flow. Second operand has 3 states, 3 states have (on average 521.0) internal successors, (1563), 3 states have internal predecessors, (1563), 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) [2023-08-30 23:40:31,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:40:31,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 515 of 1129 [2023-08-30 23:40:31,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:41:31,000 INFO L130 PetriNetUnfolder]: 583729/764821 cut-off events. [2023-08-30 23:41:31,001 INFO L131 PetriNetUnfolder]: For 350886/350886 co-relation queries the response was YES. [2023-08-30 23:41:33,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857336 conditions, 764821 events. 583729/764821 cut-off events. For 350886/350886 co-relation queries the response was YES. Maximal size of possible extension queue 11586. Compared 5173129 event pairs, 358586 based on Foata normal form. 0/660457 useless extension candidates. Maximal degree in co-relation 1857325. Up to 672087 conditions per place. [2023-08-30 23:41:35,716 INFO L137 encePairwiseOnDemand]: 1110/1129 looper letters, 192 selfloop transitions, 28 changer transitions 4/226 dead transitions. [2023-08-30 23:41:35,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 226 transitions, 1142 flow [2023-08-30 23:41:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:41:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:41:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1725 transitions. [2023-08-30 23:41:35,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093002657218778 [2023-08-30 23:41:35,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1725 transitions. [2023-08-30 23:41:35,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1725 transitions. [2023-08-30 23:41:35,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:41:35,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1725 transitions. [2023-08-30 23:41:35,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 575.0) internal successors, (1725), 3 states have internal predecessors, (1725), 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) [2023-08-30 23:41:35,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:41:35,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:41:35,724 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 419 flow. Second operand 3 states and 1725 transitions. [2023-08-30 23:41:35,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 226 transitions, 1142 flow [2023-08-30 23:41:36,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 226 transitions, 1137 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 23:41:36,964 INFO L231 Difference]: Finished difference. Result has 107 places, 159 transitions, 672 flow [2023-08-30 23:41:36,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=672, PETRI_PLACES=107, PETRI_TRANSITIONS=159} [2023-08-30 23:41:36,965 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 15 predicate places. [2023-08-30 23:41:36,965 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 159 transitions, 672 flow [2023-08-30 23:41:36,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 521.0) internal successors, (1563), 3 states have internal predecessors, (1563), 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) [2023-08-30 23:41:36,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:41:36,966 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:41:36,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 23:41:36,966 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:41:36,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:41:36,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2071016609, now seen corresponding path program 1 times [2023-08-30 23:41:36,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:41:36,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349884619] [2023-08-30 23:41:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:41:36,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:41:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:41:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 23:41:37,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:41:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349884619] [2023-08-30 23:41:37,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349884619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:41:37,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:41:37,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:41:37,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405065974] [2023-08-30 23:41:37,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:41:37,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:41:37,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:41:37,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:41:37,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:41:37,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 1129 [2023-08-30 23:41:37,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 159 transitions, 672 flow. Second operand has 3 states, 3 states have (on average 532.6666666666666) internal successors, (1598), 3 states have internal predecessors, (1598), 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) [2023-08-30 23:41:37,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:41:37,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 1129 [2023-08-30 23:41:37,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:42:40,479 INFO L130 PetriNetUnfolder]: 601191/787414 cut-off events. [2023-08-30 23:42:40,479 INFO L131 PetriNetUnfolder]: For 472891/472891 co-relation queries the response was YES. [2023-08-30 23:42:42,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2020659 conditions, 787414 events. 601191/787414 cut-off events. For 472891/472891 co-relation queries the response was YES. Maximal size of possible extension queue 10048. Compared 5235219 event pairs, 425486 based on Foata normal form. 5650/690614 useless extension candidates. Maximal degree in co-relation 2020647. Up to 763154 conditions per place. [2023-08-30 23:42:45,257 INFO L137 encePairwiseOnDemand]: 1126/1129 looper letters, 239 selfloop transitions, 2 changer transitions 2/245 dead transitions. [2023-08-30 23:42:45,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 245 transitions, 1484 flow [2023-08-30 23:42:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:42:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:42:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1758 transitions. [2023-08-30 23:42:45,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190434012400355 [2023-08-30 23:42:45,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1758 transitions. [2023-08-30 23:42:45,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1758 transitions. [2023-08-30 23:42:45,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:42:45,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1758 transitions. [2023-08-30 23:42:45,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 586.0) internal successors, (1758), 3 states have internal predecessors, (1758), 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) [2023-08-30 23:42:45,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:42:45,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-08-30 23:42:45,266 INFO L175 Difference]: Start difference. First operand has 107 places, 159 transitions, 672 flow. Second operand 3 states and 1758 transitions. [2023-08-30 23:42:45,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 245 transitions, 1484 flow [2023-08-30 23:43:06,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 245 transitions, 1408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:43:06,990 INFO L231 Difference]: Finished difference. Result has 108 places, 160 transitions, 630 flow [2023-08-30 23:43:06,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=108, PETRI_TRANSITIONS=160} [2023-08-30 23:43:06,991 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 16 predicate places. [2023-08-30 23:43:06,991 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 160 transitions, 630 flow [2023-08-30 23:43:06,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 532.6666666666666) internal successors, (1598), 3 states have internal predecessors, (1598), 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) [2023-08-30 23:43:06,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:43:06,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:43:06,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 23:43:06,991 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:43:06,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:43:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash -505569051, now seen corresponding path program 1 times [2023-08-30 23:43:06,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:43:06,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717462514] [2023-08-30 23:43:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:43:06,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:43:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:43:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 23:43:07,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:43:07,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717462514] [2023-08-30 23:43:07,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717462514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:43:07,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:43:07,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:43:07,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131618640] [2023-08-30 23:43:07,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:43:07,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:43:07,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:43:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:43:07,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:43:07,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 1129 [2023-08-30 23:43:07,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 160 transitions, 630 flow. Second operand has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 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) [2023-08-30 23:43:07,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:43:07,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 1129 [2023-08-30 23:43:07,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand