./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-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 ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 19:16:09,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 19:16:09,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 19:16:09,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 19:16:09,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 19:16:09,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 19:16:09,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 19:16:09,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 19:16:09,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 19:16:09,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 19:16:09,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 19:16:09,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 19:16:09,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 19:16:09,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 19:16:09,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 19:16:09,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 19:16:09,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 19:16:09,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 19:16:09,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 19:16:09,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 19:16:09,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 19:16:09,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 19:16:09,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 19:16:09,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 19:16:09,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 19:16:09,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 19:16:09,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 19:16:09,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 19:16:09,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 19:16:09,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 19:16:09,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 19:16:09,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 19:16:09,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 19:16:09,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 19:16:09,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 19:16:09,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 19:16:09,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 19:16:09,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 19:16:09,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 19:16:09,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 19:16:09,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 19:16:09,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 19:16:09,965 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 19:16:09,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 19:16:09,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 19:16:09,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 19:16:09,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 19:16:09,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 19:16:09,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 19:16:09,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 19:16:09,968 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 19:16:09,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 19:16:09,969 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 19:16:09,969 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 19:16:09,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 19:16:09,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 19:16:09,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 19:16:09,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 19:16:09,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 19:16:09,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 19:16:09,970 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 19:16:09,970 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 19:16:09,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 19:16:09,970 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 19:16:09,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 19:16:09,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 19:16:09,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 19:16:09,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 19:16:09,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 19:16:09,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 19:16:09,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 19:16:09,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 19:16:09,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 19:16:09,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 19:16:09,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 19:16:09,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 19:16:09,972 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 19:16:09,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 19:16:09,973 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 19:16:09,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 19:16:10,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 19:16:10,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 19:16:10,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 19:16:10,217 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 19:16:10,217 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 19:16:10,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-31 19:16:11,117 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 19:16:11,444 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 19:16:11,444 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-31 19:16:11,474 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0bd130ce/81d7315c723a41509ecafd2728104820/FLAG7aa1a9f46 [2023-08-31 19:16:11,497 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0bd130ce/81d7315c723a41509ecafd2728104820 [2023-08-31 19:16:11,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 19:16:11,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 19:16:11,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 19:16:11,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 19:16:11,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 19:16:11,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 07:16:11" (1/1) ... [2023-08-31 19:16:11,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68479144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:11, skipping insertion in model container [2023-08-31 19:16:11,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 07:16:11" (1/1) ... [2023-08-31 19:16:11,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 19:16:11,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 19:16:12,102 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-08-31 19:16:12,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 19:16:12,114 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 19:16:12,178 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-08-31 19:16:12,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 19:16:12,275 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 19:16:12,276 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 19:16:12,280 INFO L208 MainTranslator]: Completed translation [2023-08-31 19:16:12,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12 WrapperNode [2023-08-31 19:16:12,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 19:16:12,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 19:16:12,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 19:16:12,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 19:16:12,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,370 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 471 [2023-08-31 19:16:12,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 19:16:12,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 19:16:12,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 19:16:12,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 19:16:12,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,463 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 19:16:12,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 19:16:12,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 19:16:12,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 19:16:12,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (1/1) ... [2023-08-31 19:16:12,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 19:16:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 19:16:12,505 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) [2023-08-31 19:16:12,529 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 [2023-08-31 19:16:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 19:16:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 19:16:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 19:16:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 19:16:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 19:16:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-08-31 19:16:12,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-08-31 19:16:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 19:16:12,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 19:16:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 19:16:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 19:16:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 19:16:12,555 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 19:16:12,798 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 19:16:12,799 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 19:16:13,275 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 19:16:13,463 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 19:16:13,463 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-31 19:16:13,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 07:16:13 BoogieIcfgContainer [2023-08-31 19:16:13,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 19:16:13,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 19:16:13,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 19:16:13,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 19:16:13,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 07:16:11" (1/3) ... [2023-08-31 19:16:13,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc054f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 07:16:13, skipping insertion in model container [2023-08-31 19:16:13,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 07:16:12" (2/3) ... [2023-08-31 19:16:13,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc054f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 07:16:13, skipping insertion in model container [2023-08-31 19:16:13,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 07:16:13" (3/3) ... [2023-08-31 19:16:13,472 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-08-31 19:16:13,485 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 19:16:13,492 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 19:16:13,492 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-31 19:16:13,493 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 19:16:13,598 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 19:16:13,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 316 transitions, 640 flow [2023-08-31 19:16:13,752 INFO L130 PetriNetUnfolder]: 19/336 cut-off events. [2023-08-31 19:16:13,753 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 19:16:13,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 336 events. 19/336 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 656 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 246. Up to 4 conditions per place. [2023-08-31 19:16:13,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 316 transitions, 640 flow [2023-08-31 19:16:13,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 307 transitions, 619 flow [2023-08-31 19:16:13,770 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 19:16:13,779 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 307 transitions, 619 flow [2023-08-31 19:16:13,782 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 307 transitions, 619 flow [2023-08-31 19:16:13,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 307 transitions, 619 flow [2023-08-31 19:16:13,831 INFO L130 PetriNetUnfolder]: 18/327 cut-off events. [2023-08-31 19:16:13,831 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 19:16:13,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 327 events. 18/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 604 event pairs, 0 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 246. Up to 4 conditions per place. [2023-08-31 19:16:13,839 INFO L119 LiptonReduction]: Number of co-enabled transitions 11492 [2023-08-31 19:16:58,683 INFO L134 LiptonReduction]: Checked pairs total: 29642 [2023-08-31 19:16:58,683 INFO L136 LiptonReduction]: Total number of compositions: 283 [2023-08-31 19:16:58,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 19:16:58,696 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;@4af7d2a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 19:16:58,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 19:16:58,699 INFO L130 PetriNetUnfolder]: 1/19 cut-off events. [2023-08-31 19:16:58,699 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 19:16:58,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 19:16:58,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-31 19:16:58,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 19:16:58,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 19:16:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash -190538623, now seen corresponding path program 1 times [2023-08-31 19:16:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 19:16:58,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674504362] [2023-08-31 19:16:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:16:58,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 19:16:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 19:16:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 19:16:59,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 19:16:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674504362] [2023-08-31 19:16:59,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674504362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 19:16:59,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 19:16:59,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 19:16:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258129003] [2023-08-31 19:16:59,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 19:16:59,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 19:16:59,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 19:16:59,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 19:16:59,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 19:16:59,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 599 [2023-08-31 19:16:59,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 264.6666666666667) internal successors, (794), 3 states have internal predecessors, (794), 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) [2023-08-31 19:16:59,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 19:16:59,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 599 [2023-08-31 19:16:59,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 19:16:59,370 INFO L130 PetriNetUnfolder]: 91/325 cut-off events. [2023-08-31 19:16:59,370 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 19:16:59,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 325 events. 91/325 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1087 event pairs, 66 based on Foata normal form. 8/278 useless extension candidates. Maximal degree in co-relation 492. Up to 188 conditions per place. [2023-08-31 19:16:59,372 INFO L137 encePairwiseOnDemand]: 570/599 looper letters, 33 selfloop transitions, 2 changer transitions 7/74 dead transitions. [2023-08-31 19:16:59,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 74 transitions, 225 flow [2023-08-31 19:16:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 19:16:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 19:16:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 852 transitions. [2023-08-31 19:16:59,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4741235392320534 [2023-08-31 19:16:59,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 852 transitions. [2023-08-31 19:16:59,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 852 transitions. [2023-08-31 19:16:59,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 19:16:59,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 852 transitions. [2023-08-31 19:16:59,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 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) [2023-08-31 19:16:59,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 599.0) internal successors, (2396), 4 states have internal predecessors, (2396), 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) [2023-08-31 19:16:59,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 599.0) internal successors, (2396), 4 states have internal predecessors, (2396), 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) [2023-08-31 19:16:59,401 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 205 flow. Second operand 3 states and 852 transitions. [2023-08-31 19:16:59,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 74 transitions, 225 flow [2023-08-31 19:16:59,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 74 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 19:16:59,405 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 149 flow [2023-08-31 19:16:59,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=599, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=72, PETRI_TRANSITIONS=67} [2023-08-31 19:16:59,408 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -20 predicate places. [2023-08-31 19:16:59,408 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 149 flow [2023-08-31 19:16:59,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.6666666666667) internal successors, (794), 3 states have internal predecessors, (794), 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) [2023-08-31 19:16:59,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 19:16:59,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 19:16:59,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 19:16:59,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 19:16:59,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 19:16:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash -333330875, now seen corresponding path program 1 times [2023-08-31 19:16:59,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 19:16:59,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230275123] [2023-08-31 19:16:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:16:59,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 19:16:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 19:16:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 19:16:59,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 19:16:59,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230275123] [2023-08-31 19:16:59,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230275123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 19:16:59,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424711924] [2023-08-31 19:16:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:16:59,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 19:16:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 19:16:59,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 19:16:59,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 19:16:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 19:16:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 19:16:59,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 19:16:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 19:16:59,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 19:16:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 19:16:59,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424711924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 19:16:59,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 19:16:59,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-31 19:16:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205197445] [2023-08-31 19:16:59,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 19:16:59,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 19:16:59,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 19:16:59,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 19:16:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-31 19:16:59,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 599 [2023-08-31 19:16:59,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 149 flow. Second operand has 8 states, 8 states have (on average 262.5) internal successors, (2100), 8 states have internal predecessors, (2100), 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) [2023-08-31 19:16:59,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 19:16:59,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 599 [2023-08-31 19:16:59,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 19:17:00,169 INFO L130 PetriNetUnfolder]: 63/231 cut-off events. [2023-08-31 19:17:00,169 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 19:17:00,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 231 events. 63/231 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 614 event pairs, 44 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 370. Up to 136 conditions per place. [2023-08-31 19:17:00,170 INFO L137 encePairwiseOnDemand]: 596/599 looper letters, 33 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-08-31 19:17:00,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 225 flow [2023-08-31 19:17:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 19:17:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 19:17:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1081 transitions. [2023-08-31 19:17:00,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511686143572621 [2023-08-31 19:17:00,174 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1081 transitions. [2023-08-31 19:17:00,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1081 transitions. [2023-08-31 19:17:00,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 19:17:00,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1081 transitions. [2023-08-31 19:17:00,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 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) [2023-08-31 19:17:00,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 599.0) internal successors, (2995), 5 states have internal predecessors, (2995), 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) [2023-08-31 19:17:00,180 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 599.0) internal successors, (2995), 5 states have internal predecessors, (2995), 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) [2023-08-31 19:17:00,180 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 149 flow. Second operand 4 states and 1081 transitions. [2023-08-31 19:17:00,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 225 flow [2023-08-31 19:17:00,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 221 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 19:17:00,183 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 161 flow [2023-08-31 19:17:00,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=599, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-08-31 19:17:00,184 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -24 predicate places. [2023-08-31 19:17:00,184 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 161 flow [2023-08-31 19:17:00,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 262.5) internal successors, (2100), 8 states have internal predecessors, (2100), 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) [2023-08-31 19:17:00,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 19:17:00,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-31 19:17:00,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 19:17:00,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 19:17:00,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 19:17:00,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 19:17:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash -464923391, now seen corresponding path program 2 times [2023-08-31 19:17:00,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 19:17:00,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925087017] [2023-08-31 19:17:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:17:00,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 19:17:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 19:17:00,433 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 19:17:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 19:17:00,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 19:17:00,470 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 19:17:00,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 19:17:00,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 19:17:00,472 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-31 19:17:00,475 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 19:17:00,476 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 19:17:00,476 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 19:17:00,580 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 19:17:00,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 514 places, 539 transitions, 1096 flow [2023-08-31 19:17:00,672 INFO L130 PetriNetUnfolder]: 36/607 cut-off events. [2023-08-31 19:17:00,673 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 19:17:00,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 607 events. 36/607 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2208 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 486. Up to 8 conditions per place. [2023-08-31 19:17:00,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 514 places, 539 transitions, 1096 flow [2023-08-31 19:17:00,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 510 places, 535 transitions, 1088 flow [2023-08-31 19:17:00,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 19:17:00,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 510 places, 535 transitions, 1088 flow [2023-08-31 19:17:00,714 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 510 places, 535 transitions, 1088 flow [2023-08-31 19:17:00,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 510 places, 535 transitions, 1088 flow [2023-08-31 19:17:00,907 INFO L130 PetriNetUnfolder]: 36/603 cut-off events. [2023-08-31 19:17:00,908 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 19:17:00,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 603 events. 36/603 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2201 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 486. Up to 8 conditions per place. [2023-08-31 19:17:00,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 125528 [2023-08-31 19:18:16,396 INFO L134 LiptonReduction]: Checked pairs total: 364679 [2023-08-31 19:18:16,397 INFO L136 LiptonReduction]: Total number of compositions: 469 [2023-08-31 19:18:16,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 19:18:16,399 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;@4af7d2a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 19:18:16,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 19:18:16,403 INFO L130 PetriNetUnfolder]: 3/52 cut-off events. [2023-08-31 19:18:16,403 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 19:18:16,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 19:18:16,403 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 19:18:16,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 19:18:16,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 19:18:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash -403207097, now seen corresponding path program 1 times [2023-08-31 19:18:16,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 19:18:16,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845438419] [2023-08-31 19:18:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:18:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 19:18:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 19:18:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 19:18:16,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 19:18:16,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845438419] [2023-08-31 19:18:16,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845438419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 19:18:16,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 19:18:16,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 19:18:16,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552724814] [2023-08-31 19:18:16,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 19:18:16,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 19:18:16,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 19:18:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 19:18:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 19:18:16,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 449 out of 1008 [2023-08-31 19:18:16,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 202 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 451.0) internal successors, (1353), 3 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 19:18:16,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 19:18:16,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 449 of 1008 [2023-08-31 19:18:16,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 19:18:18,965 INFO L130 PetriNetUnfolder]: 10692/21522 cut-off events. [2023-08-31 19:18:18,965 INFO L131 PetriNetUnfolder]: For 294/344 co-relation queries the response was YES. [2023-08-31 19:18:18,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37392 conditions, 21522 events. 10692/21522 cut-off events. For 294/344 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 181129 event pairs, 8578 based on Foata normal form. 658/17935 useless extension candidates. Maximal degree in co-relation 30928. Up to 15709 conditions per place. [2023-08-31 19:18:19,052 INFO L137 encePairwiseOnDemand]: 955/1008 looper letters, 72 selfloop transitions, 2 changer transitions 13/152 dead transitions. [2023-08-31 19:18:19,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 152 transitions, 482 flow [2023-08-31 19:18:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 19:18:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 19:18:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1478 transitions. [2023-08-31 19:18:19,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4887566137566138 [2023-08-31 19:18:19,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1478 transitions. [2023-08-31 19:18:19,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1478 transitions. [2023-08-31 19:18:19,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 19:18:19,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1478 transitions. [2023-08-31 19:18:19,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 492.6666666666667) internal successors, (1478), 3 states have internal predecessors, (1478), 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) [2023-08-31 19:18:19,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1008.0) internal successors, (4032), 4 states have internal predecessors, (4032), 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) [2023-08-31 19:18:19,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1008.0) internal successors, (4032), 4 states have internal predecessors, (4032), 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) [2023-08-31 19:18:19,067 INFO L175 Difference]: Start difference. First operand has 184 places, 202 transitions, 422 flow. Second operand 3 states and 1478 transitions. [2023-08-31 19:18:19,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 152 transitions, 482 flow [2023-08-31 19:18:19,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 152 transitions, 482 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 19:18:19,071 INFO L231 Difference]: Finished difference. Result has 144 places, 139 transitions, 300 flow [2023-08-31 19:18:19,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1008, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=144, PETRI_TRANSITIONS=139} [2023-08-31 19:18:19,073 INFO L281 CegarLoopForPetriNet]: 184 programPoint places, -40 predicate places. [2023-08-31 19:18:19,074 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 139 transitions, 300 flow [2023-08-31 19:18:19,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 451.0) internal successors, (1353), 3 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 19:18:19,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 19:18:19,074 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 19:18:19,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 19:18:19,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 19:18:19,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 19:18:19,075 INFO L85 PathProgramCache]: Analyzing trace with hash 879417492, now seen corresponding path program 1 times [2023-08-31 19:18:19,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 19:18:19,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45668577] [2023-08-31 19:18:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:18:19,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 19:18:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 19:18:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 19:18:19,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 19:18:19,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45668577] [2023-08-31 19:18:19,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45668577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 19:18:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705935333] [2023-08-31 19:18:19,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:18:19,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 19:18:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 19:18:19,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 19:18:19,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 19:18:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 19:18:19,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 19:18:19,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 19:18:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 19:18:19,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 19:18:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 19:18:19,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705935333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 19:18:19,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 19:18:19,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-31 19:18:19,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434143694] [2023-08-31 19:18:19,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 19:18:19,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 19:18:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 19:18:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 19:18:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-31 19:18:19,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 1008 [2023-08-31 19:18:19,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 139 transitions, 300 flow. Second operand has 8 states, 8 states have (on average 448.625) internal successors, (3589), 8 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 19:18:19,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 19:18:19,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 1008 [2023-08-31 19:18:19,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 19:18:21,069 INFO L130 PetriNetUnfolder]: 4859/10110 cut-off events. [2023-08-31 19:18:21,069 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-08-31 19:18:21,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17521 conditions, 10110 events. 4859/10110 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 77420 event pairs, 3832 based on Foata normal form. 0/8836 useless extension candidates. Maximal degree in co-relation 17508. Up to 7299 conditions per place. [2023-08-31 19:18:21,102 INFO L137 encePairwiseOnDemand]: 1005/1008 looper letters, 72 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2023-08-31 19:18:21,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 140 transitions, 454 flow [2023-08-31 19:18:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 19:18:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 19:18:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1864 transitions. [2023-08-31 19:18:21,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623015873015873 [2023-08-31 19:18:21,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1864 transitions. [2023-08-31 19:18:21,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1864 transitions. [2023-08-31 19:18:21,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 19:18:21,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1864 transitions. [2023-08-31 19:18:21,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 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) [2023-08-31 19:18:21,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1008.0) internal successors, (5040), 5 states have internal predecessors, (5040), 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) [2023-08-31 19:18:21,117 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1008.0) internal successors, (5040), 5 states have internal predecessors, (5040), 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) [2023-08-31 19:18:21,117 INFO L175 Difference]: Start difference. First operand has 144 places, 139 transitions, 300 flow. Second operand 4 states and 1864 transitions. [2023-08-31 19:18:21,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 140 transitions, 454 flow [2023-08-31 19:18:21,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 140 transitions, 448 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 19:18:21,120 INFO L231 Difference]: Finished difference. Result has 136 places, 140 transitions, 310 flow [2023-08-31 19:18:21,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1008, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=136, PETRI_TRANSITIONS=140} [2023-08-31 19:18:21,120 INFO L281 CegarLoopForPetriNet]: 184 programPoint places, -48 predicate places. [2023-08-31 19:18:21,120 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 140 transitions, 310 flow [2023-08-31 19:18:21,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 448.625) internal successors, (3589), 8 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 19:18:21,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 19:18:21,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 19:18:21,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 19:18:21,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 19:18:21,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 19:18:21,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 19:18:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1986074087, now seen corresponding path program 2 times [2023-08-31 19:18:21,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 19:18:21,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466342429] [2023-08-31 19:18:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:18:21,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 19:18:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 19:18:21,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 19:18:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 19:18:21,394 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 19:18:21,394 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 19:18:21,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 19:18:21,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 19:18:21,395 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-31 19:18:21,395 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 19:18:21,395 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 19:18:21,395 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 19:18:21,491 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 19:18:21,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 726 places, 762 transitions, 1554 flow [2023-08-31 19:18:21,701 INFO L130 PetriNetUnfolder]: 58/917 cut-off events. [2023-08-31 19:18:21,702 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 19:18:21,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 917 events. 58/917 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4436 event pairs, 1 based on Foata normal form. 0/762 useless extension candidates. Maximal degree in co-relation 747. Up to 16 conditions per place. [2023-08-31 19:18:21,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 726 places, 762 transitions, 1554 flow [2023-08-31 19:18:21,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 722 places, 758 transitions, 1546 flow [2023-08-31 19:18:21,732 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 19:18:21,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 722 places, 758 transitions, 1546 flow [2023-08-31 19:18:21,733 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 722 places, 758 transitions, 1546 flow [2023-08-31 19:18:21,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 722 places, 758 transitions, 1546 flow [2023-08-31 19:18:21,935 INFO L130 PetriNetUnfolder]: 58/913 cut-off events. [2023-08-31 19:18:21,935 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 19:18:21,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 913 events. 58/913 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4418 event pairs, 1 based on Foata normal form. 0/762 useless extension candidates. Maximal degree in co-relation 747. Up to 16 conditions per place. [2023-08-31 19:18:22,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 336804 [2023-08-31 19:20:04,325 INFO L134 LiptonReduction]: Checked pairs total: 892031 [2023-08-31 19:20:04,325 INFO L136 LiptonReduction]: Total number of compositions: 649 [2023-08-31 19:20:04,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 19:20:04,327 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;@4af7d2a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 19:20:04,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 19:20:04,333 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2023-08-31 19:20:04,333 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 19:20:04,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 19:20:04,333 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 19:20:04,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 19:20:04,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 19:20:04,334 INFO L85 PathProgramCache]: Analyzing trace with hash -227993210, now seen corresponding path program 1 times [2023-08-31 19:20:04,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 19:20:04,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015556687] [2023-08-31 19:20:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:20:04,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 19:20:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 19:20:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 19:20:04,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 19:20:04,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015556687] [2023-08-31 19:20:04,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015556687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 19:20:04,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 19:20:04,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 19:20:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954855732] [2023-08-31 19:20:04,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 19:20:04,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 19:20:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 19:20:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 19:20:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 19:20:04,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1411 [2023-08-31 19:20:04,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 296 transitions, 622 flow. Second operand has 3 states, 3 states have (on average 637.3333333333334) internal successors, (1912), 3 states have internal predecessors, (1912), 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) [2023-08-31 19:20:04,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 19:20:04,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1411 [2023-08-31 19:20:04,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 19:21:13,160 INFO L130 PetriNetUnfolder]: 504587/813822 cut-off events. [2023-08-31 19:21:13,161 INFO L131 PetriNetUnfolder]: For 12939/13492 co-relation queries the response was YES. [2023-08-31 19:21:14,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478528 conditions, 813822 events. 504587/813822 cut-off events. For 12939/13492 co-relation queries the response was YES. Maximal size of possible extension queue 12696. Compared 8455608 event pairs, 409702 based on Foata normal form. 29502/684458 useless extension candidates. Maximal degree in co-relation 555851. Up to 658607 conditions per place. [2023-08-31 19:21:16,186 INFO L137 encePairwiseOnDemand]: 1333/1411 looper letters, 108 selfloop transitions, 2 changer transitions 14/219 dead transitions. [2023-08-31 19:21:16,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 219 transitions, 702 flow [2023-08-31 19:21:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 19:21:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 19:21:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2098 transitions. [2023-08-31 19:21:16,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49562957713205763 [2023-08-31 19:21:16,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2098 transitions. [2023-08-31 19:21:16,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2098 transitions. [2023-08-31 19:21:16,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 19:21:16,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2098 transitions. [2023-08-31 19:21:16,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 699.3333333333334) internal successors, (2098), 3 states have internal predecessors, (2098), 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) [2023-08-31 19:21:16,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1411.0) internal successors, (5644), 4 states have internal predecessors, (5644), 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) [2023-08-31 19:21:16,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1411.0) internal successors, (5644), 4 states have internal predecessors, (5644), 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) [2023-08-31 19:21:16,200 INFO L175 Difference]: Start difference. First operand has 269 places, 296 transitions, 622 flow. Second operand 3 states and 2098 transitions. [2023-08-31 19:21:16,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 219 transitions, 702 flow [2023-08-31 19:21:16,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 219 transitions, 702 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 19:21:16,205 INFO L231 Difference]: Finished difference. Result has 206 places, 205 transitions, 441 flow [2023-08-31 19:21:16,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1411, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=441, PETRI_PLACES=206, PETRI_TRANSITIONS=205} [2023-08-31 19:21:16,206 INFO L281 CegarLoopForPetriNet]: 269 programPoint places, -63 predicate places. [2023-08-31 19:21:16,206 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 205 transitions, 441 flow [2023-08-31 19:21:16,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 637.3333333333334) internal successors, (1912), 3 states have internal predecessors, (1912), 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) [2023-08-31 19:21:16,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 19:21:16,207 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 19:21:16,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 19:21:16,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 19:21:16,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 19:21:16,207 INFO L85 PathProgramCache]: Analyzing trace with hash -79914026, now seen corresponding path program 1 times [2023-08-31 19:21:16,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 19:21:16,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478514687] [2023-08-31 19:21:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:21:16,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 19:21:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 19:21:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 19:21:16,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 19:21:16,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478514687] [2023-08-31 19:21:16,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478514687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 19:21:16,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210712130] [2023-08-31 19:21:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 19:21:16,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 19:21:16,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 19:21:16,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 19:21:16,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 19:21:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 19:21:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 19:21:16,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 19:21:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 19:21:16,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 19:21:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 19:21:16,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210712130] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 19:21:16,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 19:21:16,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 19:21:16,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766397625] [2023-08-31 19:21:16,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 19:21:16,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 19:21:16,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 19:21:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 19:21:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-31 19:21:16,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 633 out of 1411 [2023-08-31 19:21:16,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 205 transitions, 441 flow. Second operand has 7 states, 7 states have (on average 634.8571428571429) internal successors, (4444), 7 states have internal predecessors, (4444), 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) [2023-08-31 19:21:16,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 19:21:16,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 633 of 1411 [2023-08-31 19:21:16,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand