./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --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 [2023-09-01 00:51:22,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:51:22,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:51:22,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:51:22,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:51:22,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:51:22,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:51:22,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:51:22,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:51:22,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:51:22,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:51:22,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:51:22,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:51:22,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:51:22,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:51:22,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:51:22,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:51:22,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:51:22,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:51:22,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:51:22,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:51:22,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:51:22,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:51:22,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:51:22,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:51:22,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:51:22,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:51:22,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:51:22,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:51:22,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:51:22,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:51:22,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:51:22,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:51:22,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:51:22,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:51:22,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:51:22,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:51:22,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:51:22,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:51:22,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:51:22,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:51:22,326 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:51:22,366 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:51:22,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:51:22,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:51:22,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:51:22,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:51:22,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:51:22,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:51:22,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:51:22,370 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:51:22,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:51:22,371 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:51:22,371 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:51:22,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:51:22,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:51:22,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:51:22,372 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:51:22,372 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:51:22,372 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:51:22,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:51:22,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:51:22,372 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:51:22,373 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:51:22,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:51:22,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:51:22,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:51:22,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:51:22,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:51:22,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:51:22,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:51:22,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:51:22,375 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:51:22,375 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:51:22,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:51:22,375 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:51:22,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:51:22,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:51:22,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:51:22,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:51:22,718 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:51:22,718 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:51:22,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-09-01 00:51:23,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:51:24,237 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:51:24,237 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-09-01 00:51:24,255 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3eb44c6/8ae59c01d6494be7aabd8ffe9442e05b/FLAGff3786668 [2023-09-01 00:51:24,276 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3eb44c6/8ae59c01d6494be7aabd8ffe9442e05b [2023-09-01 00:51:24,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:51:24,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:51:24,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:51:24,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:51:24,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:51:24,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:24,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d07d841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24, skipping insertion in model container [2023-09-01 00:51:24,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:24,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:51:24,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:51:24,797 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-09-01 00:51:24,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:51:24,860 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:51:24,887 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-09-01 00:51:24,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:51:24,980 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:51:24,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24 WrapperNode [2023-09-01 00:51:24,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:51:24,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:51:24,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:51:24,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:51:24,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,058 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-09-01 00:51:25,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:51:25,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:51:25,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:51:25,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:51:25,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,103 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:51:25,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:51:25,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:51:25,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:51:25,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (1/1) ... [2023-09-01 00:51:25,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:51:25,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:25,136 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) [2023-09-01 00:51:25,156 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 [2023-09-01 00:51:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:51:25,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:51:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:51:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:51:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:51:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:51:25,173 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:51:25,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:51:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:51:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:51:25,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:51:25,175 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:51:25,318 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:51:25,320 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:51:25,662 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:51:25,670 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:51:25,670 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 00:51:25,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:51:25 BoogieIcfgContainer [2023-09-01 00:51:25,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:51:25,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:51:25,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:51:25,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:51:25,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:51:24" (1/3) ... [2023-09-01 00:51:25,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156ac12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:51:25, skipping insertion in model container [2023-09-01 00:51:25,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:24" (2/3) ... [2023-09-01 00:51:25,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156ac12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:51:25, skipping insertion in model container [2023-09-01 00:51:25,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:51:25" (3/3) ... [2023-09-01 00:51:25,680 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-09-01 00:51:25,695 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:51:25,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-09-01 00:51:25,696 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:51:25,787 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:51:25,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 221 transitions, 450 flow [2023-09-01 00:51:25,908 INFO L130 PetriNetUnfolder]: 45/308 cut-off events. [2023-09-01 00:51:25,908 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 00:51:25,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 308 events. 45/308 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1153 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-09-01 00:51:25,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 221 transitions, 450 flow [2023-09-01 00:51:25,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 216 transitions, 437 flow [2023-09-01 00:51:25,950 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:51:25,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 216 transitions, 437 flow [2023-09-01 00:51:25,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 216 transitions, 437 flow [2023-09-01 00:51:25,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 216 transitions, 437 flow [2023-09-01 00:51:26,007 INFO L130 PetriNetUnfolder]: 44/303 cut-off events. [2023-09-01 00:51:26,007 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:51:26,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 303 events. 44/303 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1116 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-09-01 00:51:26,018 INFO L119 LiptonReduction]: Number of co-enabled transitions 15066 [2023-09-01 00:51:29,806 INFO L134 LiptonReduction]: Checked pairs total: 30005 [2023-09-01 00:51:29,807 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-09-01 00:51:29,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:51:29,827 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@194a9382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:51:29,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:51:29,835 INFO L130 PetriNetUnfolder]: 7/44 cut-off events. [2023-09-01 00:51:29,835 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:51:29,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:29,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 00:51:29,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:29,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:29,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1539572513, now seen corresponding path program 1 times [2023-09-01 00:51:29,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:29,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157733784] [2023-09-01 00:51:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:51:30,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:30,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157733784] [2023-09-01 00:51:30,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157733784] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:51:30,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:51:30,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:51:30,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283091094] [2023-09-01 00:51:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:51:30,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:51:30,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:30,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:51:30,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:51:30,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 435 [2023-09-01 00:51:30,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 91 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 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) [2023-09-01 00:51:30,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:30,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 435 [2023-09-01 00:51:30,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:30,494 INFO L130 PetriNetUnfolder]: 569/1283 cut-off events. [2023-09-01 00:51:30,494 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:51:30,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1283 events. 569/1283 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8335 event pairs, 520 based on Foata normal form. 98/938 useless extension candidates. Maximal degree in co-relation 2332. Up to 1116 conditions per place. [2023-09-01 00:51:30,502 INFO L137 encePairwiseOnDemand]: 403/435 looper letters, 28 selfloop transitions, 2 changer transitions 26/63 dead transitions. [2023-09-01 00:51:30,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 233 flow [2023-09-01 00:51:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:51:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:51:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-09-01 00:51:30,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896551724137931 [2023-09-01 00:51:30,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-09-01 00:51:30,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-09-01 00:51:30,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:30,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-09-01 00:51:30,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 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) [2023-09-01 00:51:30,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 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) [2023-09-01 00:51:30,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 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) [2023-09-01 00:51:30,544 INFO L175 Difference]: Start difference. First operand has 70 places, 91 transitions, 187 flow. Second operand 3 states and 639 transitions. [2023-09-01 00:51:30,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 233 flow [2023-09-01 00:51:30,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 233 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:51:30,551 INFO L231 Difference]: Finished difference. Result has 65 places, 37 transitions, 89 flow [2023-09-01 00:51:30,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=65, PETRI_TRANSITIONS=37} [2023-09-01 00:51:30,556 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -5 predicate places. [2023-09-01 00:51:30,556 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 37 transitions, 89 flow [2023-09-01 00:51:30,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 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) [2023-09-01 00:51:30,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:30,557 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:30,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:51:30,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:30,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1541412343, now seen corresponding path program 1 times [2023-09-01 00:51:30,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:30,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116530392] [2023-09-01 00:51:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:30,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:51:30,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:30,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116530392] [2023-09-01 00:51:30,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116530392] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13142320] [2023-09-01 00:51:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:30,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:30,666 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) [2023-09-01 00:51:30,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 00:51:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:30,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:51:30,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:51:30,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:51:30,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13142320] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:30,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:30,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:51:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919218461] [2023-09-01 00:51:30,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:30,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:51:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:51:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:51:30,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-09-01 00:51:30,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 37 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 186.57142857142858) internal successors, (1306), 7 states have internal predecessors, (1306), 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) [2023-09-01 00:51:30,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:30,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-09-01 00:51:30,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:31,022 INFO L130 PetriNetUnfolder]: 107/275 cut-off events. [2023-09-01 00:51:31,023 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:51:31,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 275 events. 107/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1172 event pairs, 100 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 517. Up to 234 conditions per place. [2023-09-01 00:51:31,024 INFO L137 encePairwiseOnDemand]: 432/435 looper letters, 28 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-09-01 00:51:31,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 167 flow [2023-09-01 00:51:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:51:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:51:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1146 transitions. [2023-09-01 00:51:31,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43908045977011495 [2023-09-01 00:51:31,028 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1146 transitions. [2023-09-01 00:51:31,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1146 transitions. [2023-09-01 00:51:31,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:31,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1146 transitions. [2023-09-01 00:51:31,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 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) [2023-09-01 00:51:31,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 435.0) internal successors, (3045), 7 states have internal predecessors, (3045), 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) [2023-09-01 00:51:31,038 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 435.0) internal successors, (3045), 7 states have internal predecessors, (3045), 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) [2023-09-01 00:51:31,038 INFO L175 Difference]: Start difference. First operand has 65 places, 37 transitions, 89 flow. Second operand 6 states and 1146 transitions. [2023-09-01 00:51:31,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 167 flow [2023-09-01 00:51:31,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 163 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 00:51:31,040 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 121 flow [2023-09-01 00:51:31,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-09-01 00:51:31,041 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -23 predicate places. [2023-09-01 00:51:31,041 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 121 flow [2023-09-01 00:51:31,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 186.57142857142858) internal successors, (1306), 7 states have internal predecessors, (1306), 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) [2023-09-01 00:51:31,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:31,042 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:31,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 00:51:31,247 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 [2023-09-01 00:51:31,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:31,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:31,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1952642911, now seen corresponding path program 2 times [2023-09-01 00:51:31,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:31,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238370253] [2023-09-01 00:51:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:31,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:51:31,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:31,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238370253] [2023-09-01 00:51:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238370253] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383705534] [2023-09-01 00:51:31,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:51:31,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:31,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:31,393 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) [2023-09-01 00:51:31,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 00:51:31,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:51:31,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:51:31,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:51:31,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:51:31,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:51:31,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383705534] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:31,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:31,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:51:31,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074302216] [2023-09-01 00:51:31,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:31,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:51:31,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:31,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:51:31,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:51:31,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-09-01 00:51:31,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 121 flow. Second operand has 13 states, 13 states have (on average 186.30769230769232) internal successors, (2422), 13 states have internal predecessors, (2422), 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) [2023-09-01 00:51:31,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:31,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-09-01 00:51:31,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:31,668 INFO L130 PetriNetUnfolder]: 107/281 cut-off events. [2023-09-01 00:51:31,668 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 00:51:31,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 281 events. 107/281 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1172 event pairs, 100 based on Foata normal form. 6/173 useless extension candidates. Maximal degree in co-relation 508. Up to 234 conditions per place. [2023-09-01 00:51:31,669 INFO L137 encePairwiseOnDemand]: 432/435 looper letters, 28 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2023-09-01 00:51:31,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 235 flow [2023-09-01 00:51:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:51:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:51:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2265 transitions. [2023-09-01 00:51:31,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339080459770115 [2023-09-01 00:51:31,675 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2265 transitions. [2023-09-01 00:51:31,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2265 transitions. [2023-09-01 00:51:31,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:31,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2265 transitions. [2023-09-01 00:51:31,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.75) internal successors, (2265), 12 states have internal predecessors, (2265), 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) [2023-09-01 00:51:31,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 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) [2023-09-01 00:51:31,693 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 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) [2023-09-01 00:51:31,693 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 121 flow. Second operand 12 states and 2265 transitions. [2023-09-01 00:51:31,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 235 flow [2023-09-01 00:51:31,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 221 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:51:31,698 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 191 flow [2023-09-01 00:51:31,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=191, PETRI_PLACES=63, PETRI_TRANSITIONS=46} [2023-09-01 00:51:31,699 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -7 predicate places. [2023-09-01 00:51:31,700 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 191 flow [2023-09-01 00:51:31,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 186.30769230769232) internal successors, (2422), 13 states have internal predecessors, (2422), 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) [2023-09-01 00:51:31,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:31,703 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:31,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 00:51:31,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 00:51:31,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:31,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:31,909 INFO L85 PathProgramCache]: Analyzing trace with hash 408086753, now seen corresponding path program 3 times [2023-09-01 00:51:31,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:31,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096910592] [2023-09-01 00:51:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:31,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:31,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:51:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:32,014 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:51:32,015 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:51:32,016 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:51:32,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:51:32,018 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:51:32,026 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:51:32,027 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:51:32,027 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:51:32,083 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:51:32,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:32,161 INFO L130 PetriNetUnfolder]: 75/507 cut-off events. [2023-09-01 00:51:32,161 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 00:51:32,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 507 events. 75/507 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2298 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 310. Up to 12 conditions per place. [2023-09-01 00:51:32,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:32,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:32,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:51:32,169 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:32,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:32,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:32,223 INFO L130 PetriNetUnfolder]: 75/507 cut-off events. [2023-09-01 00:51:32,223 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 00:51:32,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 507 events. 75/507 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2298 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 310. Up to 12 conditions per place. [2023-09-01 00:51:32,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 45036 [2023-09-01 00:51:36,671 INFO L134 LiptonReduction]: Checked pairs total: 92835 [2023-09-01 00:51:36,672 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-09-01 00:51:36,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:51:36,682 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@194a9382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:51:36,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:51:36,705 INFO L130 PetriNetUnfolder]: 35/150 cut-off events. [2023-09-01 00:51:36,705 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:51:36,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:36,706 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:36,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:36,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1463582916, now seen corresponding path program 1 times [2023-09-01 00:51:36,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:36,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389647373] [2023-09-01 00:51:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:36,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:36,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:36,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389647373] [2023-09-01 00:51:36,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389647373] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:51:36,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:51:36,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:51:36,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528258786] [2023-09-01 00:51:36,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:51:36,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:51:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:36,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:51:36,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:51:36,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 571 [2023-09-01 00:51:36,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:51:36,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:36,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 571 [2023-09-01 00:51:36,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:40,090 INFO L130 PetriNetUnfolder]: 23659/39443 cut-off events. [2023-09-01 00:51:40,090 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-09-01 00:51:40,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74305 conditions, 39443 events. 23659/39443 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1599. Compared 333878 event pairs, 22344 based on Foata normal form. 3236/29986 useless extension candidates. Maximal degree in co-relation 31621. Up to 34738 conditions per place. [2023-09-01 00:51:40,198 INFO L137 encePairwiseOnDemand]: 529/571 looper letters, 47 selfloop transitions, 2 changer transitions 32/97 dead transitions. [2023-09-01 00:51:40,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 362 flow [2023-09-01 00:51:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:51:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:51:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-09-01 00:51:40,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119673088149446 [2023-09-01 00:51:40,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-09-01 00:51:40,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-09-01 00:51:40,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:40,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-09-01 00:51:40,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 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) [2023-09-01 00:51:40,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 571.0) internal successors, (2284), 4 states have internal predecessors, (2284), 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) [2023-09-01 00:51:40,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 571.0) internal successors, (2284), 4 states have internal predecessors, (2284), 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) [2023-09-01 00:51:40,207 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 877 transitions. [2023-09-01 00:51:40,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 362 flow [2023-09-01 00:51:40,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:51:40,214 INFO L231 Difference]: Finished difference. Result has 98 places, 65 transitions, 152 flow [2023-09-01 00:51:40,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=571, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=98, PETRI_TRANSITIONS=65} [2023-09-01 00:51:40,215 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-09-01 00:51:40,216 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 65 transitions, 152 flow [2023-09-01 00:51:40,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:51:40,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:40,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:40,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:51:40,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:40,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash 969898816, now seen corresponding path program 1 times [2023-09-01 00:51:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502644594] [2023-09-01 00:51:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:40,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:40,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:40,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502644594] [2023-09-01 00:51:40,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502644594] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:40,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331591218] [2023-09-01 00:51:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:40,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:40,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:40,280 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) [2023-09-01 00:51:40,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 00:51:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:51:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:40,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:40,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331591218] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:40,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:40,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:51:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071970183] [2023-09-01 00:51:40,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:40,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:51:40,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:40,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:51:40,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:51:40,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 571 [2023-09-01 00:51:40,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 65 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 254.71428571428572) internal successors, (1783), 7 states have internal predecessors, (1783), 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) [2023-09-01 00:51:40,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:40,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 571 [2023-09-01 00:51:40,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:41,091 INFO L130 PetriNetUnfolder]: 4492/7777 cut-off events. [2023-09-01 00:51:41,092 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 00:51:41,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14675 conditions, 7777 events. 4492/7777 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54547 event pairs, 4275 based on Foata normal form. 0/5054 useless extension candidates. Maximal degree in co-relation 14662. Up to 6803 conditions per place. [2023-09-01 00:51:41,117 INFO L137 encePairwiseOnDemand]: 568/571 looper letters, 47 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-09-01 00:51:41,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 268 flow [2023-09-01 00:51:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:51:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:51:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1573 transitions. [2023-09-01 00:51:41,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913601868067716 [2023-09-01 00:51:41,124 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1573 transitions. [2023-09-01 00:51:41,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1573 transitions. [2023-09-01 00:51:41,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:41,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1573 transitions. [2023-09-01 00:51:41,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 262.1666666666667) internal successors, (1573), 6 states have internal predecessors, (1573), 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) [2023-09-01 00:51:41,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 571.0) internal successors, (3997), 7 states have internal predecessors, (3997), 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) [2023-09-01 00:51:41,135 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 571.0) internal successors, (3997), 7 states have internal predecessors, (3997), 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) [2023-09-01 00:51:41,135 INFO L175 Difference]: Start difference. First operand has 98 places, 65 transitions, 152 flow. Second operand 6 states and 1573 transitions. [2023-09-01 00:51:41,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 268 flow [2023-09-01 00:51:41,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 262 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 00:51:41,137 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 182 flow [2023-09-01 00:51:41,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=571, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-09-01 00:51:41,141 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -27 predicate places. [2023-09-01 00:51:41,141 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 182 flow [2023-09-01 00:51:41,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 254.71428571428572) internal successors, (1783), 7 states have internal predecessors, (1783), 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) [2023-09-01 00:51:41,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:41,142 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:41,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 00:51:41,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:41,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:41,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash -513458236, now seen corresponding path program 2 times [2023-09-01 00:51:41,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:41,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317449039] [2023-09-01 00:51:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:41,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:41,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:41,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317449039] [2023-09-01 00:51:41,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317449039] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:41,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424914811] [2023-09-01 00:51:41,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:51:41,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:41,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:41,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:51:41,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 00:51:41,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:51:41,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:51:41,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:51:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:41,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:41,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424914811] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:41,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:41,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:51:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401661391] [2023-09-01 00:51:41,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:41,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:51:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:51:41,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:51:41,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 571 [2023-09-01 00:51:41,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 182 flow. Second operand has 13 states, 13 states have (on average 254.3846153846154) internal successors, (3307), 13 states have internal predecessors, (3307), 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) [2023-09-01 00:51:41,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:41,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 571 [2023-09-01 00:51:41,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:42,498 INFO L130 PetriNetUnfolder]: 4492/7783 cut-off events. [2023-09-01 00:51:42,499 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-09-01 00:51:42,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14704 conditions, 7783 events. 4492/7783 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54600 event pairs, 4275 based on Foata normal form. 6/5067 useless extension candidates. Maximal degree in co-relation 14645. Up to 6803 conditions per place. [2023-09-01 00:51:42,525 INFO L137 encePairwiseOnDemand]: 568/571 looper letters, 47 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-09-01 00:51:42,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 334 flow [2023-09-01 00:51:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:51:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:51:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3100 transitions. [2023-09-01 00:51:42,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45242265032107415 [2023-09-01 00:51:42,533 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3100 transitions. [2023-09-01 00:51:42,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3100 transitions. [2023-09-01 00:51:42,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:42,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3100 transitions. [2023-09-01 00:51:42,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 258.3333333333333) internal successors, (3100), 12 states have internal predecessors, (3100), 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) [2023-09-01 00:51:42,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 571.0) internal successors, (7423), 13 states have internal predecessors, (7423), 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) [2023-09-01 00:51:42,552 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 571.0) internal successors, (7423), 13 states have internal predecessors, (7423), 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) [2023-09-01 00:51:42,552 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 182 flow. Second operand 12 states and 3100 transitions. [2023-09-01 00:51:42,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 334 flow [2023-09-01 00:51:42,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 74 transitions, 320 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:51:42,554 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 252 flow [2023-09-01 00:51:42,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=571, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=252, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2023-09-01 00:51:42,555 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2023-09-01 00:51:42,556 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 252 flow [2023-09-01 00:51:42,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 254.3846153846154) internal successors, (3307), 13 states have internal predecessors, (3307), 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) [2023-09-01 00:51:42,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:42,557 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:42,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 00:51:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:42,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:42,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1592675908, now seen corresponding path program 3 times [2023-09-01 00:51:42,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:42,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461298460] [2023-09-01 00:51:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:42,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:42,785 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:51:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:42,822 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:51:42,822 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:51:42,823 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:51:42,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:51:42,823 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:51:42,824 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:51:42,824 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:51:42,824 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:51:42,872 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:51:42,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:42,983 INFO L130 PetriNetUnfolder]: 110/747 cut-off events. [2023-09-01 00:51:42,984 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 00:51:42,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 747 events. 110/747 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3732 event pairs, 1 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 515. Up to 16 conditions per place. [2023-09-01 00:51:42,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:43,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:43,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:51:43,003 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:43,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:43,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:43,104 INFO L130 PetriNetUnfolder]: 110/747 cut-off events. [2023-09-01 00:51:43,105 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 00:51:43,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 747 events. 110/747 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3732 event pairs, 1 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 515. Up to 16 conditions per place. [2023-09-01 00:51:43,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 87966 [2023-09-01 00:51:48,528 INFO L134 LiptonReduction]: Checked pairs total: 186051 [2023-09-01 00:51:48,528 INFO L136 LiptonReduction]: Total number of compositions: 349 [2023-09-01 00:51:48,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:51:48,530 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@194a9382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:51:48,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:51:48,555 INFO L130 PetriNetUnfolder]: 62/250 cut-off events. [2023-09-01 00:51:48,555 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:51:48,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:48,555 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:48,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:48,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:48,556 INFO L85 PathProgramCache]: Analyzing trace with hash -987275449, now seen corresponding path program 1 times [2023-09-01 00:51:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:48,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742350736] [2023-09-01 00:51:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:48,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:51:48,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:48,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742350736] [2023-09-01 00:51:48,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742350736] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:51:48,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:51:48,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:51:48,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923622831] [2023-09-01 00:51:48,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:51:48,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:51:48,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:48,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:51:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:51:48,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 736 [2023-09-01 00:51:48,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 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) [2023-09-01 00:51:48,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:48,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 736 [2023-09-01 00:51:48,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:53:05,792 INFO L130 PetriNetUnfolder]: 786509/1121323 cut-off events. [2023-09-01 00:53:05,792 INFO L131 PetriNetUnfolder]: For 5919/5919 co-relation queries the response was YES. [2023-09-01 00:53:07,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158476 conditions, 1121323 events. 786509/1121323 cut-off events. For 5919/5919 co-relation queries the response was YES. Maximal size of possible extension queue 35865. Compared 10675265 event pairs, 757686 based on Foata normal form. 96530/814141 useless extension candidates. Maximal degree in co-relation 252116. Up to 1033503 conditions per place. [2023-09-01 00:53:08,663 INFO L137 encePairwiseOnDemand]: 682/736 looper letters, 69 selfloop transitions, 2 changer transitions 33/125 dead transitions. [2023-09-01 00:53:08,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 125 transitions, 476 flow [2023-09-01 00:53:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:53:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:53:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-09-01 00:53:08,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2023-09-01 00:53:08,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-09-01 00:53:08,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-09-01 00:53:08,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:53:08,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-09-01 00:53:08,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 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) [2023-09-01 00:53:08,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 736.0) internal successors, (2944), 4 states have internal predecessors, (2944), 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) [2023-09-01 00:53:08,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 736.0) internal successors, (2944), 4 states have internal predecessors, (2944), 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) [2023-09-01 00:53:08,690 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 380 flow. Second operand 3 states and 1116 transitions. [2023-09-01 00:53:08,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 125 transitions, 476 flow [2023-09-01 00:53:08,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 125 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:53:08,698 INFO L231 Difference]: Finished difference. Result has 126 places, 92 transitions, 215 flow [2023-09-01 00:53:08,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=126, PETRI_TRANSITIONS=92} [2023-09-01 00:53:08,699 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -7 predicate places. [2023-09-01 00:53:08,699 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 92 transitions, 215 flow [2023-09-01 00:53:08,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 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) [2023-09-01 00:53:08,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:53:08,700 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:53:08,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:53:08,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:53:08,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:53:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 876878394, now seen corresponding path program 1 times [2023-09-01 00:53:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:53:08,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935152953] [2023-09-01 00:53:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:53:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:53:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:53:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:53:08,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:53:08,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935152953] [2023-09-01 00:53:08,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935152953] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:53:08,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84317521] [2023-09-01 00:53:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:53:08,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:53:08,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:53:08,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:53:08,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 00:53:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:53:08,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:53:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:53:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:53:08,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:53:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:53:08,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84317521] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:53:08,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:53:08,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:53:08,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947143690] [2023-09-01 00:53:08,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:53:08,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:53:08,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:53:08,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:53:08,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:53:08,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 736 [2023-09-01 00:53:08,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 92 transitions, 215 flow. Second operand has 7 states, 7 states have (on average 322.85714285714283) internal successors, (2260), 7 states have internal predecessors, (2260), 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) [2023-09-01 00:53:08,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:53:08,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 736 [2023-09-01 00:53:08,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:53:22,393 INFO L130 PetriNetUnfolder]: 152906/220679 cut-off events. [2023-09-01 00:53:22,394 INFO L131 PetriNetUnfolder]: For 3043/3043 co-relation queries the response was YES. [2023-09-01 00:53:22,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425665 conditions, 220679 events. 152906/220679 cut-off events. For 3043/3043 co-relation queries the response was YES. Maximal size of possible extension queue 8038. Compared 1852033 event pairs, 147163 based on Foata normal form. 0/135910 useless extension candidates. Maximal degree in co-relation 425651. Up to 202731 conditions per place. [2023-09-01 00:53:23,276 INFO L137 encePairwiseOnDemand]: 733/736 looper letters, 69 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-09-01 00:53:23,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 95 transitions, 375 flow [2023-09-01 00:53:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:53:23,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:53:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2003 transitions. [2023-09-01 00:53:23,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4535778985507246 [2023-09-01 00:53:23,281 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2003 transitions. [2023-09-01 00:53:23,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2003 transitions. [2023-09-01 00:53:23,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:53:23,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2003 transitions. [2023-09-01 00:53:23,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 333.8333333333333) internal successors, (2003), 6 states have internal predecessors, (2003), 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) [2023-09-01 00:53:23,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 736.0) internal successors, (5152), 7 states have internal predecessors, (5152), 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) [2023-09-01 00:53:23,292 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 736.0) internal successors, (5152), 7 states have internal predecessors, (5152), 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) [2023-09-01 00:53:23,292 INFO L175 Difference]: Start difference. First operand has 126 places, 92 transitions, 215 flow. Second operand 6 states and 2003 transitions. [2023-09-01 00:53:23,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 95 transitions, 375 flow [2023-09-01 00:53:23,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 95 transitions, 365 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 00:53:23,297 INFO L231 Difference]: Finished difference. Result has 104 places, 95 transitions, 241 flow [2023-09-01 00:53:23,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=104, PETRI_TRANSITIONS=95} [2023-09-01 00:53:23,298 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -29 predicate places. [2023-09-01 00:53:23,298 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 95 transitions, 241 flow [2023-09-01 00:53:23,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 322.85714285714283) internal successors, (2260), 7 states have internal predecessors, (2260), 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) [2023-09-01 00:53:23,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:53:23,299 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:53:23,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 00:53:23,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 00:53:23,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:53:23,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:53:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash 66585607, now seen corresponding path program 2 times [2023-09-01 00:53:23,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:53:23,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718505772] [2023-09-01 00:53:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:53:23,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:53:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:53:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:53:23,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:53:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718505772] [2023-09-01 00:53:23,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718505772] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:53:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886555848] [2023-09-01 00:53:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:53:23,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:53:23,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:53:23,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:53:23,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 00:53:23,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:53:23,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:53:23,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:53:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:53:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:53:23,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:53:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:53:23,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886555848] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:53:23,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:53:23,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:53:23,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489643084] [2023-09-01 00:53:23,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:53:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:53:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:53:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:53:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:53:23,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 736 [2023-09-01 00:53:23,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 95 transitions, 241 flow. Second operand has 13 states, 13 states have (on average 322.46153846153845) internal successors, (4192), 13 states have internal predecessors, (4192), 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) [2023-09-01 00:53:23,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:53:23,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 736 [2023-09-01 00:53:23,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:53:38,306 INFO L130 PetriNetUnfolder]: 152906/220685 cut-off events. [2023-09-01 00:53:38,306 INFO L131 PetriNetUnfolder]: For 1318/1318 co-relation queries the response was YES. [2023-09-01 00:53:38,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424952 conditions, 220685 events. 152906/220685 cut-off events. For 1318/1318 co-relation queries the response was YES. Maximal size of possible extension queue 8038. Compared 1852225 event pairs, 147163 based on Foata normal form. 6/135923 useless extension candidates. Maximal degree in co-relation 424892. Up to 202731 conditions per place. [2023-09-01 00:53:39,064 INFO L137 encePairwiseOnDemand]: 733/736 looper letters, 69 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-09-01 00:53:39,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 101 transitions, 437 flow [2023-09-01 00:53:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:53:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:53:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3938 transitions. [2023-09-01 00:53:39,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458786231884058 [2023-09-01 00:53:39,074 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3938 transitions. [2023-09-01 00:53:39,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3938 transitions. [2023-09-01 00:53:39,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:53:39,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3938 transitions. [2023-09-01 00:53:39,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 328.1666666666667) internal successors, (3938), 12 states have internal predecessors, (3938), 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) [2023-09-01 00:53:39,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 736.0) internal successors, (9568), 13 states have internal predecessors, (9568), 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) [2023-09-01 00:53:39,097 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 736.0) internal successors, (9568), 13 states have internal predecessors, (9568), 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) [2023-09-01 00:53:39,097 INFO L175 Difference]: Start difference. First operand has 104 places, 95 transitions, 241 flow. Second operand 12 states and 3938 transitions. [2023-09-01 00:53:39,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 101 transitions, 437 flow [2023-09-01 00:53:39,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 101 transitions, 423 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:53:39,100 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 311 flow [2023-09-01 00:53:39,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=311, PETRI_PLACES=120, PETRI_TRANSITIONS=101} [2023-09-01 00:53:39,101 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -13 predicate places. [2023-09-01 00:53:39,101 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 311 flow [2023-09-01 00:53:39,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 322.46153846153845) internal successors, (4192), 13 states have internal predecessors, (4192), 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) [2023-09-01 00:53:39,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:53:39,103 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:53:39,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 00:53:39,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:53:39,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:53:39,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:53:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2090121433, now seen corresponding path program 3 times [2023-09-01 00:53:39,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:53:39,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903630515] [2023-09-01 00:53:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:53:39,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:53:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:53:39,343 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:53:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:53:39,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:53:39,386 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:53:39,386 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:53:39,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:53:39,387 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:53:39,388 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:53:39,389 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:53:39,389 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 00:53:39,433 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:53:39,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:39,600 INFO L130 PetriNetUnfolder]: 157/1071 cut-off events. [2023-09-01 00:53:39,600 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 00:53:39,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1071 events. 157/1071 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5736 event pairs, 6 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 767. Up to 32 conditions per place. [2023-09-01 00:53:39,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:39,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:39,622 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:53:39,622 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:39,622 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:39,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:39,920 INFO L130 PetriNetUnfolder]: 157/1071 cut-off events. [2023-09-01 00:53:39,920 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 00:53:39,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1071 events. 157/1071 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5736 event pairs, 6 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 767. Up to 32 conditions per place. [2023-09-01 00:53:39,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 144504 [2023-09-01 00:53:45,685 INFO L134 LiptonReduction]: Checked pairs total: 312836 [2023-09-01 00:53:45,685 INFO L136 LiptonReduction]: Total number of compositions: 416 [2023-09-01 00:53:45,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:53:45,687 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@194a9382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:53:45,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:53:45,710 INFO L130 PetriNetUnfolder]: 83/347 cut-off events. [2023-09-01 00:53:45,710 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 00:53:45,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:53:45,710 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:53:45,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:53:45,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:53:45,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1233653470, now seen corresponding path program 1 times [2023-09-01 00:53:45,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:53:45,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845780231] [2023-09-01 00:53:45,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:53:45,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:53:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:53:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-09-01 00:53:45,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:53:45,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845780231] [2023-09-01 00:53:45,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845780231] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:53:45,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:53:45,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:53:45,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429861043] [2023-09-01 00:53:45,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:53:45,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:53:45,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:53:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:53:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:53:45,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 886 [2023-09-01 00:53:45,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 214 transitions, 472 flow. Second operand has 3 states, 3 states have (on average 392.6666666666667) internal successors, (1178), 3 states have internal predecessors, (1178), 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) [2023-09-01 00:53:45,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:53:45,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 886 [2023-09-01 00:53:45,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand