./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.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-ext/14_spin2003.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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --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 22:54:49,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:54:49,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:54:49,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:54:49,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:54:49,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:54:49,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:54:49,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:54:49,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:54:49,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:54:49,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:54:49,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:54:49,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:54:49,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:54:49,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:54:49,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:54:49,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:54:49,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:54:49,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:54:49,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:54:49,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:54:49,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:54:49,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:54:49,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:54:49,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:54:49,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:54:49,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:54:49,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:54:49,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:54:49,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:54:49,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:54:49,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:54:49,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:54:49,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:54:49,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:54:49,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:54:49,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:54:49,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:54:49,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:54:49,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:54:49,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:54:49,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:54:49,425 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:54:49,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:54:49,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:54:49,427 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:54:49,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:54:49,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:54:49,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:54:49,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:54:49,428 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:54:49,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:54:49,429 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:54:49,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:54:49,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:54:49,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:54:49,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:54:49,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:54:49,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:54:49,430 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:54:49,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:54:49,431 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:54:49,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:54:49,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:54:49,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:54:49,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:54:49,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:54:49,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:54:49,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:54:49,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:54:49,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:54:49,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:54:49,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:54:49,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:54:49,433 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:54:49,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:54:49,433 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:54:49,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:54:49,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:54:49,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:54:49,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:54:49,695 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:54:49,696 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:54:49,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-30 22:54:50,685 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:54:50,890 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:54:50,893 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-30 22:54:50,900 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ce965659/3d69c5371e974013b14c1eea0eb828e3/FLAGc8661cb5c [2023-08-30 22:54:50,912 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ce965659/3d69c5371e974013b14c1eea0eb828e3 [2023-08-30 22:54:50,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:54:50,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:54:50,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:54:50,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:54:50,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:54:50,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:54:50" (1/1) ... [2023-08-30 22:54:50,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35910383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:50, skipping insertion in model container [2023-08-30 22:54:50,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:54:50" (1/1) ... [2023-08-30 22:54:50,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:54:50,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:54:51,161 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-ext/14_spin2003.i[30203,30216] [2023-08-30 22:54:51,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:54:51,175 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:54:51,207 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-ext/14_spin2003.i[30203,30216] [2023-08-30 22:54:51,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:54:51,243 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:54:51,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51 WrapperNode [2023-08-30 22:54:51,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:54:51,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:54:51,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:54:51,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:54:51,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,284 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2023-08-30 22:54:51,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:54:51,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:54:51,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:54:51,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:54:51,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,301 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:54:51,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:54:51,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:54:51,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:54:51,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (1/1) ... [2023-08-30 22:54:51,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:54:51,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:54:51,327 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 22:54:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 22:54:51,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 22:54:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:54:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:54:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:54:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:54:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:54:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:54:51,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:54:51,355 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 22:54:51,334 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 22:54:51,457 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:54:51,458 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:54:51,535 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:54:51,555 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:54:51,557 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 22:54:51,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:54:51 BoogieIcfgContainer [2023-08-30 22:54:51,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:54:51,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:54:51,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:54:51,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:54:51,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:54:50" (1/3) ... [2023-08-30 22:54:51,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d2870d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:54:51, skipping insertion in model container [2023-08-30 22:54:51,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:54:51" (2/3) ... [2023-08-30 22:54:51,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d2870d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:54:51, skipping insertion in model container [2023-08-30 22:54:51,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:54:51" (3/3) ... [2023-08-30 22:54:51,563 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-08-30 22:54:51,568 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:54:51,574 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:54:51,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:54:51,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:54:51,614 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:54:51,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 81 flow [2023-08-30 22:54:51,655 INFO L130 PetriNetUnfolder]: 3/48 cut-off events. [2023-08-30 22:54:51,655 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:54:51,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 3/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-08-30 22:54:51,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 81 flow [2023-08-30 22:54:51,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 81 flow [2023-08-30 22:54:51,662 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:54:51,671 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 38 transitions, 81 flow [2023-08-30 22:54:51,676 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 38 transitions, 81 flow [2023-08-30 22:54:51,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 81 flow [2023-08-30 22:54:51,703 INFO L130 PetriNetUnfolder]: 3/48 cut-off events. [2023-08-30 22:54:51,703 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:54:51,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 3/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-08-30 22:54:51,704 INFO L119 LiptonReduction]: Number of co-enabled transitions 312 [2023-08-30 22:54:52,602 INFO L134 LiptonReduction]: Checked pairs total: 276 [2023-08-30 22:54:52,603 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-30 22:54:52,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:54:52,626 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;@1b5e8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:54:52,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 22:54:52,630 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 22:54:52,631 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:54:52,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:52,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:54:52,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 22:54:52,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash 6420180, now seen corresponding path program 1 times [2023-08-30 22:54:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:52,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81508768] [2023-08-30 22:54:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:52,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:52,776 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 22:54:52,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:52,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81508768] [2023-08-30 22:54:52,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81508768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:54:52,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:54:52,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:54:52,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274687982] [2023-08-30 22:54:52,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:54:52,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:54:52,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:54:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:54:52,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:54:52,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 76 [2023-08-30 22:54:52,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 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 22:54:52,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:54:52,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 76 [2023-08-30 22:54:52,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:54:52,825 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 22:54:52,825 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:54:52,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-30 22:54:52,826 INFO L137 encePairwiseOnDemand]: 74/76 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-30 22:54:52,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-30 22:54:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:54:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:54:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 69 transitions. [2023-08-30 22:54:52,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45394736842105265 [2023-08-30 22:54:52,834 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 69 transitions. [2023-08-30 22:54:52,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 69 transitions. [2023-08-30 22:54:52,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:52,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 69 transitions. [2023-08-30 22:54:52,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 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 22:54:52,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 22:54:52,843 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 22:54:52,844 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 69 transitions. [2023-08-30 22:54:52,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-30 22:54:52,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:54:52,846 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-30 22:54:52,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-30 22:54:52,850 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-30 22:54:52,850 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-30 22:54:52,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 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 22:54:52,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:52,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 22:54:52,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:54:52,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 22:54:52,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:52,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1874808867, now seen corresponding path program 1 times [2023-08-30 22:54:52,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:52,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287271379] [2023-08-30 22:54:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:52,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:54:52,887 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:54:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:54:52,913 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:54:52,916 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:54:52,917 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 22:54:52,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 22:54:52,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 22:54:52,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:54:52,919 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:54:52,925 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:54:52,925 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 22:54:52,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:54:52,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 114 flow [2023-08-30 22:54:52,960 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-08-30 22:54:52,960 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:54:52,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-08-30 22:54:52,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 51 transitions, 114 flow [2023-08-30 22:54:52,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 51 transitions, 114 flow [2023-08-30 22:54:52,963 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:54:52,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions, 114 flow [2023-08-30 22:54:52,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 53 places, 51 transitions, 114 flow [2023-08-30 22:54:52,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 114 flow [2023-08-30 22:54:52,979 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-08-30 22:54:52,979 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:54:52,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-08-30 22:54:52,981 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-08-30 22:54:53,583 INFO L134 LiptonReduction]: Checked pairs total: 2481 [2023-08-30 22:54:53,583 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-08-30 22:54:53,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:54:53,585 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;@1b5e8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:54:53,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 22:54:53,587 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2023-08-30 22:54:53,587 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:54:53,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:53,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:53,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 22:54:53,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:53,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1296823008, now seen corresponding path program 1 times [2023-08-30 22:54:53,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:53,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126492329] [2023-08-30 22:54:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:53,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:53,643 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 22:54:53,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126492329] [2023-08-30 22:54:53,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126492329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:54:53,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:54:53,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:54:53,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162828192] [2023-08-30 22:54:53,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:54:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:54:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:54:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:54:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:54:53,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 86 [2023-08-30 22:54:53,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 22:54:53,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:54:53,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 86 [2023-08-30 22:54:53,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:54:53,709 INFO L130 PetriNetUnfolder]: 97/220 cut-off events. [2023-08-30 22:54:53,709 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 22:54:53,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 220 events. 97/220 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1035 event pairs, 61 based on Foata normal form. 14/227 useless extension candidates. Maximal degree in co-relation 164. Up to 143 conditions per place. [2023-08-30 22:54:53,711 INFO L137 encePairwiseOnDemand]: 77/86 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-30 22:54:53,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 129 flow [2023-08-30 22:54:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:54:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:54:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-08-30 22:54:53,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2023-08-30 22:54:53,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-08-30 22:54:53,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-08-30 22:54:53,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:53,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-08-30 22:54:53,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 22:54:53,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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 22:54:53,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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 22:54:53,714 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 56 flow. Second operand 3 states and 128 transitions. [2023-08-30 22:54:53,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 129 flow [2023-08-30 22:54:53,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 22:54:53,715 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 88 flow [2023-08-30 22:54:53,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-08-30 22:54:53,716 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-08-30 22:54:53,716 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 88 flow [2023-08-30 22:54:53,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 22:54:53,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:53,716 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 22:54:53,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:54:53,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 22:54:53,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash -359606286, now seen corresponding path program 1 times [2023-08-30 22:54:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:53,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500022698] [2023-08-30 22:54:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:53,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:54:53,737 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:54:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:54:53,748 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:54:53,756 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:54:53,757 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 22:54:53,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 22:54:53,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 22:54:53,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 22:54:53,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:54:53,758 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:54:53,758 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:54:53,758 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 22:54:53,769 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:54:53,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2023-08-30 22:54:53,779 INFO L130 PetriNetUnfolder]: 7/98 cut-off events. [2023-08-30 22:54:53,780 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:54:53,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 7/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-08-30 22:54:53,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2023-08-30 22:54:53,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 64 transitions, 149 flow [2023-08-30 22:54:53,784 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:54:53,785 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 64 transitions, 149 flow [2023-08-30 22:54:53,785 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 64 transitions, 149 flow [2023-08-30 22:54:53,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2023-08-30 22:54:53,793 INFO L130 PetriNetUnfolder]: 7/98 cut-off events. [2023-08-30 22:54:53,794 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:54:53,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 7/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-08-30 22:54:53,796 INFO L119 LiptonReduction]: Number of co-enabled transitions 1872 [2023-08-30 22:54:54,505 INFO L134 LiptonReduction]: Checked pairs total: 6517 [2023-08-30 22:54:54,505 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-30 22:54:54,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:54:54,508 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;@1b5e8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:54:54,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 22:54:54,510 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-08-30 22:54:54,510 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:54:54,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:54,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:54,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:54:54,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:54,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2064616778, now seen corresponding path program 1 times [2023-08-30 22:54:54,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:54,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633060873] [2023-08-30 22:54:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:54,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:54,535 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 22:54:54,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:54,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633060873] [2023-08-30 22:54:54,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633060873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:54:54,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:54:54,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:54:54,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729649380] [2023-08-30 22:54:54,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:54:54,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:54:54,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:54:54,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:54:54,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:54:54,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 108 [2023-08-30 22:54:54,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 22:54:54,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:54:54,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 108 [2023-08-30 22:54:54,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:54:54,698 INFO L130 PetriNetUnfolder]: 966/1762 cut-off events. [2023-08-30 22:54:54,698 INFO L131 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2023-08-30 22:54:54,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 1762 events. 966/1762 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11489 event pairs, 535 based on Foata normal form. 242/1965 useless extension candidates. Maximal degree in co-relation 564. Up to 993 conditions per place. [2023-08-30 22:54:54,704 INFO L137 encePairwiseOnDemand]: 94/108 looper letters, 28 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2023-08-30 22:54:54,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 185 flow [2023-08-30 22:54:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:54:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:54:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-08-30 22:54:54,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2023-08-30 22:54:54,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-08-30 22:54:54,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-08-30 22:54:54,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:54,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-08-30 22:54:54,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 22:54:54,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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 22:54:54,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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 22:54:54,713 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 87 flow. Second operand 3 states and 157 transitions. [2023-08-30 22:54:54,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 185 flow [2023-08-30 22:54:54,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 177 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 22:54:54,716 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 125 flow [2023-08-30 22:54:54,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-30 22:54:54,718 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-08-30 22:54:54,718 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 125 flow [2023-08-30 22:54:54,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 22:54:54,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:54,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:54,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:54:54,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:54:54,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:54,720 INFO L85 PathProgramCache]: Analyzing trace with hash -61043069, now seen corresponding path program 1 times [2023-08-30 22:54:54,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:54,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466980267] [2023-08-30 22:54:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:54,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:54:54,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:54,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466980267] [2023-08-30 22:54:54,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466980267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:54:54,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:54:54,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:54:54,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838683095] [2023-08-30 22:54:54,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:54:54,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:54:54,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:54:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:54:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:54:54,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 108 [2023-08-30 22:54:54,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 22:54:54,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:54:54,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 108 [2023-08-30 22:54:54,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:54:54,833 INFO L130 PetriNetUnfolder]: 49/233 cut-off events. [2023-08-30 22:54:54,833 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-08-30 22:54:54,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1138 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 311. Up to 58 conditions per place. [2023-08-30 22:54:54,834 INFO L137 encePairwiseOnDemand]: 102/108 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-08-30 22:54:54,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 133 flow [2023-08-30 22:54:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:54:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:54:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-08-30 22:54:54,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2023-08-30 22:54:54,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-08-30 22:54:54,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-08-30 22:54:54,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:54,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-08-30 22:54:54,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 22:54:54,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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 22:54:54,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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 22:54:54,840 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 125 flow. Second operand 3 states and 155 transitions. [2023-08-30 22:54:54,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 133 flow [2023-08-30 22:54:54,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 22:54:54,842 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 73 flow [2023-08-30 22:54:54,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-30 22:54:54,845 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-08-30 22:54:54,845 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 73 flow [2023-08-30 22:54:54,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 22:54:54,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:54,845 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 22:54:54,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:54:54,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:54:54,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1070778839, now seen corresponding path program 1 times [2023-08-30 22:54:54,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:54,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833443401] [2023-08-30 22:54:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:54,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:54:54,855 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:54:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:54:54,883 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:54:54,883 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:54:54,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 22:54:54,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 22:54:54,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 22:54:54,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 22:54:54,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 22:54:54,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:54:54,897 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 22:54:54,898 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:54:54,898 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 22:54:54,908 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:54:54,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 186 flow [2023-08-30 22:54:54,917 INFO L130 PetriNetUnfolder]: 9/123 cut-off events. [2023-08-30 22:54:54,917 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:54:54,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 9/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-30 22:54:54,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 77 transitions, 186 flow [2023-08-30 22:54:54,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 77 transitions, 186 flow [2023-08-30 22:54:54,918 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:54:54,918 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 77 transitions, 186 flow [2023-08-30 22:54:54,919 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 77 transitions, 186 flow [2023-08-30 22:54:54,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 186 flow [2023-08-30 22:54:54,925 INFO L130 PetriNetUnfolder]: 9/123 cut-off events. [2023-08-30 22:54:54,926 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:54:54,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 9/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-30 22:54:54,928 INFO L119 LiptonReduction]: Number of co-enabled transitions 3120 [2023-08-30 22:54:55,691 INFO L134 LiptonReduction]: Checked pairs total: 11569 [2023-08-30 22:54:55,692 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-30 22:54:55,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:54:55,693 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;@1b5e8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:54:55,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:54:55,694 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-08-30 22:54:55,694 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:54:55,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:55,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:55,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:54:55,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:55,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1726470574, now seen corresponding path program 1 times [2023-08-30 22:54:55,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:55,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619175569] [2023-08-30 22:54:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:55,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:55,710 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 22:54:55,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:55,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619175569] [2023-08-30 22:54:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619175569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:54:55,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:54:55,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:54:55,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695794362] [2023-08-30 22:54:55,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:54:55,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:54:55,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:54:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:54:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:54:55,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 128 [2023-08-30 22:54:55,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 22:54:55,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:54:55,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 128 [2023-08-30 22:54:55,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:54:56,806 INFO L130 PetriNetUnfolder]: 10745/16935 cut-off events. [2023-08-30 22:54:56,807 INFO L131 PetriNetUnfolder]: For 4025/4025 co-relation queries the response was YES. [2023-08-30 22:54:56,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34577 conditions, 16935 events. 10745/16935 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 130996 event pairs, 5857 based on Foata normal form. 2766/19188 useless extension candidates. Maximal degree in co-relation 3785. Up to 9097 conditions per place. [2023-08-30 22:54:56,894 INFO L137 encePairwiseOnDemand]: 109/128 looper letters, 38 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2023-08-30 22:54:56,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 255 flow [2023-08-30 22:54:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:54:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:54:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-08-30 22:54:56,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-08-30 22:54:56,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-08-30 22:54:56,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-08-30 22:54:56,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:56,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-08-30 22:54:56,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 22:54:56,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 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 22:54:56,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 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 22:54:56,898 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 116 flow. Second operand 3 states and 188 transitions. [2023-08-30 22:54:56,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 255 flow [2023-08-30 22:54:56,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 237 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 22:54:56,903 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 166 flow [2023-08-30 22:54:56,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-30 22:54:56,905 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-30 22:54:56,905 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 166 flow [2023-08-30 22:54:56,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 22:54:56,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:56,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:56,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 22:54:56,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:54:56,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:56,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1862175219, now seen corresponding path program 1 times [2023-08-30 22:54:56,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:56,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106133896] [2023-08-30 22:54:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:56,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:54:56,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:56,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106133896] [2023-08-30 22:54:56,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106133896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:54:56,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:54:56,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:54:56,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162806170] [2023-08-30 22:54:56,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:54:56,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:54:56,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:54:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:54:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:54:56,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 128 [2023-08-30 22:54:56,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 22:54:56,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:54:56,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 128 [2023-08-30 22:54:56,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:54:57,022 INFO L130 PetriNetUnfolder]: 149/641 cut-off events. [2023-08-30 22:54:57,022 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-30 22:54:57,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4263 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 879. Up to 164 conditions per place. [2023-08-30 22:54:57,025 INFO L137 encePairwiseOnDemand]: 120/128 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2023-08-30 22:54:57,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 173 flow [2023-08-30 22:54:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:54:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:54:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-30 22:54:57,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-08-30 22:54:57,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-30 22:54:57,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-30 22:54:57,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:57,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-30 22:54:57,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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 22:54:57,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 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 22:54:57,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 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 22:54:57,028 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 166 flow. Second operand 3 states and 184 transitions. [2023-08-30 22:54:57,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 173 flow [2023-08-30 22:54:57,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 22:54:57,030 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 94 flow [2023-08-30 22:54:57,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 22:54:57,031 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2023-08-30 22:54:57,031 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 94 flow [2023-08-30 22:54:57,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 22:54:57,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:57,031 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:57,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 22:54:57,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:54:57,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:57,032 INFO L85 PathProgramCache]: Analyzing trace with hash -256467015, now seen corresponding path program 1 times [2023-08-30 22:54:57,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:57,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436829133] [2023-08-30 22:54:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:57,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:54:57,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:54:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:54:57,049 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:54:57,049 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:54:57,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 22:54:57,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 22:54:57,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 22:54:57,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 22:54:57,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 22:54:57,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 22:54:57,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 22:54:57,050 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 22:54:57,050 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:54:57,051 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 22:54:57,064 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:54:57,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 225 flow [2023-08-30 22:54:57,073 INFO L130 PetriNetUnfolder]: 11/148 cut-off events. [2023-08-30 22:54:57,073 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 22:54:57,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 11/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 281 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-08-30 22:54:57,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 90 transitions, 225 flow [2023-08-30 22:54:57,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 90 transitions, 225 flow [2023-08-30 22:54:57,074 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:54:57,074 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 90 transitions, 225 flow [2023-08-30 22:54:57,074 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 90 transitions, 225 flow [2023-08-30 22:54:57,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 225 flow [2023-08-30 22:54:57,082 INFO L130 PetriNetUnfolder]: 11/148 cut-off events. [2023-08-30 22:54:57,082 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 22:54:57,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 11/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 281 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-08-30 22:54:57,085 INFO L119 LiptonReduction]: Number of co-enabled transitions 4680 [2023-08-30 22:54:57,967 INFO L134 LiptonReduction]: Checked pairs total: 18397 [2023-08-30 22:54:57,968 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-30 22:54:57,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:54:57,969 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;@1b5e8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:54:57,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 22:54:57,970 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-08-30 22:54:57,970 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:54:57,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:57,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:57,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 22:54:57,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1920413755, now seen corresponding path program 1 times [2023-08-30 22:54:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:57,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829389913] [2023-08-30 22:54:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:57,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:57,984 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 22:54:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829389913] [2023-08-30 22:54:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829389913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:54:57,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:54:57,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:54:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573351985] [2023-08-30 22:54:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:54:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:54:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:54:57,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:54:57,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:54:58,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 150 [2023-08-30 22:54:58,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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 22:54:58,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:54:58,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 150 [2023-08-30 22:54:58,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:55:04,006 INFO L130 PetriNetUnfolder]: 84206/120198 cut-off events. [2023-08-30 22:55:04,006 INFO L131 PetriNetUnfolder]: For 38290/38290 co-relation queries the response was YES. [2023-08-30 22:55:04,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248373 conditions, 120198 events. 84206/120198 cut-off events. For 38290/38290 co-relation queries the response was YES. Maximal size of possible extension queue 6117. Compared 972063 event pairs, 44681 based on Foata normal form. 14930/133185 useless extension candidates. Maximal degree in co-relation 31252. Up to 62881 conditions per place. [2023-08-30 22:55:04,855 INFO L137 encePairwiseOnDemand]: 128/150 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-08-30 22:55:04,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 321 flow [2023-08-30 22:55:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:55:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:55:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-08-30 22:55:04,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-08-30 22:55:04,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-08-30 22:55:04,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-08-30 22:55:04,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:55:04,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-08-30 22:55:04,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 22:55:04,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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 22:55:04,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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 22:55:04,858 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 147 flow. Second operand 3 states and 215 transitions. [2023-08-30 22:55:04,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 321 flow [2023-08-30 22:55:04,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 289 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 22:55:04,911 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 199 flow [2023-08-30 22:55:04,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-30 22:55:04,912 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 22:55:04,912 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 199 flow [2023-08-30 22:55:04,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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 22:55:04,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:55:04,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:55:04,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 22:55:04,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 22:55:04,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:55:04,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1573246126, now seen corresponding path program 1 times [2023-08-30 22:55:04,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:55:04,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553288966] [2023-08-30 22:55:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:55:04,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:55:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:55:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:55:04,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:55:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553288966] [2023-08-30 22:55:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553288966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:55:04,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:55:04,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:55:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828599219] [2023-08-30 22:55:04,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:55:04,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:55:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:55:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:55:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:55:04,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 150 [2023-08-30 22:55:04,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 22:55:04,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:55:04,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 150 [2023-08-30 22:55:04,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:55:05,070 INFO L130 PetriNetUnfolder]: 405/1641 cut-off events. [2023-08-30 22:55:05,071 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2023-08-30 22:55:05,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3728 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13505 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 2227. Up to 436 conditions per place. [2023-08-30 22:55:05,076 INFO L137 encePairwiseOnDemand]: 140/150 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-08-30 22:55:05,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 213 flow [2023-08-30 22:55:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:55:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:55:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-08-30 22:55:05,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2023-08-30 22:55:05,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-08-30 22:55:05,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-08-30 22:55:05,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:55:05,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-08-30 22:55:05,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 22:55:05,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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 22:55:05,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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 22:55:05,080 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 199 flow. Second operand 3 states and 213 transitions. [2023-08-30 22:55:05,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 213 flow [2023-08-30 22:55:05,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 22:55:05,085 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 115 flow [2023-08-30 22:55:05,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-30 22:55:05,086 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-08-30 22:55:05,086 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 115 flow [2023-08-30 22:55:05,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 22:55:05,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:55:05,087 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:55:05,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 22:55:05,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 22:55:05,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:55:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash 42929866, now seen corresponding path program 1 times [2023-08-30 22:55:05,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:55:05,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903584200] [2023-08-30 22:55:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:55:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:55:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:55:05,101 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:55:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:55:05,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:55:05,114 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:55:05,114 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 22:55:05,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 22:55:05,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 22:55:05,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 22:55:05,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 22:55:05,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 22:55:05,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 22:55:05,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 22:55:05,115 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 22:55:05,115 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:55:05,116 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 22:55:05,132 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:55:05,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 103 transitions, 266 flow [2023-08-30 22:55:05,146 INFO L130 PetriNetUnfolder]: 13/173 cut-off events. [2023-08-30 22:55:05,147 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 22:55:05,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 13/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 335 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 169. Up to 14 conditions per place. [2023-08-30 22:55:05,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 103 transitions, 266 flow [2023-08-30 22:55:05,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 103 transitions, 266 flow [2023-08-30 22:55:05,148 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:55:05,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 103 transitions, 266 flow [2023-08-30 22:55:05,148 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 103 transitions, 266 flow [2023-08-30 22:55:05,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 103 transitions, 266 flow [2023-08-30 22:55:05,158 INFO L130 PetriNetUnfolder]: 13/173 cut-off events. [2023-08-30 22:55:05,158 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 22:55:05,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 13/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 335 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 169. Up to 14 conditions per place. [2023-08-30 22:55:05,161 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-30 22:55:06,099 INFO L134 LiptonReduction]: Checked pairs total: 25062 [2023-08-30 22:55:06,099 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-30 22:55:06,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:55:06,100 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;@1b5e8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:55:06,100 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 22:55:06,101 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-08-30 22:55:06,102 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:55:06,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:55:06,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:55:06,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 22:55:06,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:55:06,102 INFO L85 PathProgramCache]: Analyzing trace with hash 203021318, now seen corresponding path program 1 times [2023-08-30 22:55:06,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:55:06,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723265147] [2023-08-30 22:55:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:55:06,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:55:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:55:06,118 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 22:55:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:55:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723265147] [2023-08-30 22:55:06,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723265147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:55:06,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:55:06,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:55:06,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426719668] [2023-08-30 22:55:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:55:06,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:55:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:55:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:55:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:55:06,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 168 [2023-08-30 22:55:06,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 22:55:06,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:55:06,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 168 [2023-08-30 22:55:06,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:56:30,015 INFO L130 PetriNetUnfolder]: 1011583/1331415 cut-off events. [2023-08-30 22:56:30,015 INFO L131 PetriNetUnfolder]: For 476467/476467 co-relation queries the response was YES. [2023-08-30 22:56:32,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2780438 conditions, 1331415 events. 1011583/1331415 cut-off events. For 476467/476467 co-relation queries the response was YES. Maximal size of possible extension queue 54254. Compared 11100593 event pairs, 548769 based on Foata normal form. 205096/1483361 useless extension candidates. Maximal degree in co-relation 365128. Up to 691385 conditions per place. [2023-08-30 22:56:39,599 INFO L137 encePairwiseOnDemand]: 141/168 looper letters, 59 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2023-08-30 22:56:39,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 409 flow [2023-08-30 22:56:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:56:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:56:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-08-30 22:56:39,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-08-30 22:56:39,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-08-30 22:56:39,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-08-30 22:56:39,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:56:39,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-08-30 22:56:39,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 22:56:39,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 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 22:56:39,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 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 22:56:39,618 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 176 flow. Second operand 3 states and 248 transitions. [2023-08-30 22:56:39,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 409 flow [2023-08-30 22:56:41,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 359 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-30 22:56:41,214 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 244 flow [2023-08-30 22:56:41,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-30 22:56:41,215 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-30 22:56:41,215 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 244 flow [2023-08-30 22:56:41,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 22:56:41,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:56:41,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:56:41,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 22:56:41,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 22:56:41,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:56:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash -927634642, now seen corresponding path program 1 times [2023-08-30 22:56:41,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:56:41,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54875647] [2023-08-30 22:56:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:56:41,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:56:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:56:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:56:41,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:56:41,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54875647] [2023-08-30 22:56:41,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54875647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:56:41,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:56:41,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:56:41,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665586817] [2023-08-30 22:56:41,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:56:41,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:56:41,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:56:41,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:56:41,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:56:41,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 168 [2023-08-30 22:56:41,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 22:56:41,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:56:41,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 168 [2023-08-30 22:56:41,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:56:41,739 INFO L130 PetriNetUnfolder]: 1061/4041 cut-off events. [2023-08-30 22:56:41,740 INFO L131 PetriNetUnfolder]: For 1153/1153 co-relation queries the response was YES. [2023-08-30 22:56:41,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9249 conditions, 4041 events. 1061/4041 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 39568 event pairs, 579 based on Foata normal form. 1564/5476 useless extension candidates. Maximal degree in co-relation 5411. Up to 1188 conditions per place. [2023-08-30 22:56:41,750 INFO L137 encePairwiseOnDemand]: 156/168 looper letters, 15 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-08-30 22:56:41,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 255 flow [2023-08-30 22:56:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:56:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:56:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-08-30 22:56:41,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2023-08-30 22:56:41,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-08-30 22:56:41,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-08-30 22:56:41,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:56:41,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-08-30 22:56:41,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 22:56:41,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 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 22:56:41,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 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 22:56:41,785 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 244 flow. Second operand 3 states and 243 transitions. [2023-08-30 22:56:41,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 255 flow [2023-08-30 22:56:41,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 203 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 22:56:41,795 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 136 flow [2023-08-30 22:56:41,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-30 22:56:41,796 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2023-08-30 22:56:41,797 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 136 flow [2023-08-30 22:56:41,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 22:56:41,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:56:41,797 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:56:41,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 22:56:41,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 22:56:41,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:56:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1949122294, now seen corresponding path program 1 times [2023-08-30 22:56:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:56:41,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863220142] [2023-08-30 22:56:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:56:41,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:56:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:56:41,824 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:56:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:56:41,845 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:56:41,846 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:56:41,846 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 22:56:41,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-30 22:56:41,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-08-30 22:56:41,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-30 22:56:41,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-30 22:56:41,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-30 22:56:41,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-30 22:56:41,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-30 22:56:41,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 22:56:41,848 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 22:56:41,849 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:56:41,849 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-30 22:56:41,877 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:56:41,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 116 transitions, 309 flow [2023-08-30 22:56:41,890 INFO L130 PetriNetUnfolder]: 15/198 cut-off events. [2023-08-30 22:56:41,890 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 22:56:41,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 198 events. 15/198 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 400 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 203. Up to 16 conditions per place. [2023-08-30 22:56:41,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 116 transitions, 309 flow [2023-08-30 22:56:41,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 116 transitions, 309 flow [2023-08-30 22:56:41,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:56:41,892 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 116 transitions, 309 flow [2023-08-30 22:56:41,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 116 transitions, 309 flow [2023-08-30 22:56:41,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 116 transitions, 309 flow [2023-08-30 22:56:41,903 INFO L130 PetriNetUnfolder]: 15/198 cut-off events. [2023-08-30 22:56:41,903 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 22:56:41,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 198 events. 15/198 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 400 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 203. Up to 16 conditions per place. [2023-08-30 22:56:41,908 INFO L119 LiptonReduction]: Number of co-enabled transitions 8736 [2023-08-30 22:56:43,090 INFO L134 LiptonReduction]: Checked pairs total: 40667 [2023-08-30 22:56:43,090 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-08-30 22:56:43,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:56:43,091 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;@1b5e8b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:56:43,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 22:56:43,092 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-08-30 22:56:43,092 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:56:43,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:56:43,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:56:43,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 22:56:43,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:56:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1499833258, now seen corresponding path program 1 times [2023-08-30 22:56:43,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:56:43,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454079278] [2023-08-30 22:56:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:56:43,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:56:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:56:43,132 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 22:56:43,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:56:43,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454079278] [2023-08-30 22:56:43,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454079278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:56:43,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:56:43,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:56:43,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232676714] [2023-08-30 22:56:43,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:56:43,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:56:43,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:56:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:56:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:56:43,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 191 [2023-08-30 22:56:43,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 22:56:43,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:56:43,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 191 [2023-08-30 22:56:43,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand