./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.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_76-tricky_address3_racefree.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 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 --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 00:50:58,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:50:58,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:50:58,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:50:58,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:50:58,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:50:58,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:50:58,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:50:58,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:50:58,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:50:58,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:50:58,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:50:58,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:50:58,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:50:58,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:50:58,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:50:58,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:50:58,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:50:58,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:50:58,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:50:58,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:50:58,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:50:58,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:50:58,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:50:58,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:50:58,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:50:58,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:50:58,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:50:58,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:50:58,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:50:58,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:50:58,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:50:58,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:50:58,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:50:58,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:50:58,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:50:58,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:50:58,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:50:58,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:50:58,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:50:58,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:50:58,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:50:58,602 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:50:58,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:50:58,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:50:58,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:50:58,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:50:58,605 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:50:58,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:50:58,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:50:58,606 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:50:58,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:50:58,607 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:50:58,607 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:50:58,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:50:58,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:50:58,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:50:58,608 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:50:58,608 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:50:58,608 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:50:58,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:50:58,609 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:50:58,609 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:50:58,609 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:50:58,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:50:58,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:50:58,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:50:58,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:50:58,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:50:58,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:50:58,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:50:58,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:50:58,611 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:50:58,611 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:50:58,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:50:58,612 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:50:58,612 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:50:58,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:50:58,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:50:58,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:50:58,926 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:50:58,926 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:50:58,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-09-01 00:51:00,169 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:51:00,477 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:51:00,477 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-09-01 00:51:00,502 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b634bd912/45b21339f306473e9d4afe5890ba33e0/FLAG4c8339212 [2023-09-01 00:51:00,514 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b634bd912/45b21339f306473e9d4afe5890ba33e0 [2023-09-01 00:51:00,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:51:00,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:51:00,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:51:00,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:51:00,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:51:00,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:51:00" (1/1) ... [2023-09-01 00:51:00,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409309ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:00, skipping insertion in model container [2023-09-01 00:51:00,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:51:00" (1/1) ... [2023-09-01 00:51:00,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:51:00,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:51:01,003 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_76-tricky_address3_racefree.i[41323,41336] [2023-09-01 00:51:01,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:51:01,069 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:51:01,108 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_76-tricky_address3_racefree.i[41323,41336] [2023-09-01 00:51:01,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:51:01,204 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:51:01,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01 WrapperNode [2023-09-01 00:51:01,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:51:01,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:51:01,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:51:01,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:51:01,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,282 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-09-01 00:51:01,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:51:01,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:51:01,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:51:01,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:51:01,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,338 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:51:01,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:51:01,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:51:01,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:51:01,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (1/1) ... [2023-09-01 00:51:01,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:51:01,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:01,392 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 00:51:01,422 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 00:51:01,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:51:01,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:51:01,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:51:01,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:51:01,439 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:51:01,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:51:01,440 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:51:01,440 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:51:01,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:51:01,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:51:01,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:51:01,442 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 00:51:01,645 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:51:01,647 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:51:01,971 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:51:01,979 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:51:01,979 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 00:51:01,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:51:01 BoogieIcfgContainer [2023-09-01 00:51:01,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:51:01,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:51:01,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:51:01,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:51:01,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:51:00" (1/3) ... [2023-09-01 00:51:01,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f17f0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:51:01, skipping insertion in model container [2023-09-01 00:51:01,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:01" (2/3) ... [2023-09-01 00:51:01,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f17f0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:51:01, skipping insertion in model container [2023-09-01 00:51:01,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:51:01" (3/3) ... [2023-09-01 00:51:01,989 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-09-01 00:51:02,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:51:02,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-09-01 00:51:02,006 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:51:02,106 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:51:02,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 221 transitions, 450 flow [2023-09-01 00:51:02,280 INFO L130 PetriNetUnfolder]: 45/308 cut-off events. [2023-09-01 00:51:02,280 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 00:51:02,289 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 00:51:02,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 221 transitions, 450 flow [2023-09-01 00:51:02,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 216 transitions, 437 flow [2023-09-01 00:51:02,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:51:02,316 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 216 transitions, 437 flow [2023-09-01 00:51:02,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 216 transitions, 437 flow [2023-09-01 00:51:02,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 216 transitions, 437 flow [2023-09-01 00:51:02,372 INFO L130 PetriNetUnfolder]: 44/303 cut-off events. [2023-09-01 00:51:02,372 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:51:02,375 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 00:51:02,382 INFO L119 LiptonReduction]: Number of co-enabled transitions 15066 [2023-09-01 00:51:06,237 INFO L134 LiptonReduction]: Checked pairs total: 30005 [2023-09-01 00:51:06,237 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-09-01 00:51:06,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:51:06,256 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;@720e3308, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:51:06,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:51:06,263 INFO L130 PetriNetUnfolder]: 7/44 cut-off events. [2023-09-01 00:51:06,264 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:51:06,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:06,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 00:51:06,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:06,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1539572513, now seen corresponding path program 1 times [2023-09-01 00:51:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:06,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320765796] [2023-09-01 00:51:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:06,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:06,483 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 00:51:06,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:06,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320765796] [2023-09-01 00:51:06,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320765796] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:51:06,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:51:06,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:51:06,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392497167] [2023-09-01 00:51:06,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:51:06,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:51:06,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:51:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:51:06,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 435 [2023-09-01 00:51:06,542 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 00:51:06,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:06,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 435 [2023-09-01 00:51:06,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:06,769 INFO L130 PetriNetUnfolder]: 569/1283 cut-off events. [2023-09-01 00:51:06,769 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:51:06,772 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 00:51:06,774 INFO L137 encePairwiseOnDemand]: 403/435 looper letters, 28 selfloop transitions, 2 changer transitions 26/63 dead transitions. [2023-09-01 00:51:06,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 233 flow [2023-09-01 00:51:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:51:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:51:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-09-01 00:51:06,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896551724137931 [2023-09-01 00:51:06,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-09-01 00:51:06,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-09-01 00:51:06,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:06,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-09-01 00:51:06,798 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 00:51:06,803 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 00:51:06,804 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 00:51:06,806 INFO L175 Difference]: Start difference. First operand has 70 places, 91 transitions, 187 flow. Second operand 3 states and 639 transitions. [2023-09-01 00:51:06,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 233 flow [2023-09-01 00:51:06,809 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 00:51:06,811 INFO L231 Difference]: Finished difference. Result has 65 places, 37 transitions, 89 flow [2023-09-01 00:51:06,812 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 00:51:06,815 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -5 predicate places. [2023-09-01 00:51:06,816 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 37 transitions, 89 flow [2023-09-01 00:51:06,816 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 00:51:06,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:06,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:06,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:51:06,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:06,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1541412343, now seen corresponding path program 1 times [2023-09-01 00:51:06,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:06,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952790028] [2023-09-01 00:51:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:06,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:06,905 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 00:51:06,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:06,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952790028] [2023-09-01 00:51:06,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952790028] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:06,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070980654] [2023-09-01 00:51:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:06,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:06,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:06,914 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 00:51:06,920 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 00:51:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:06,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:51:06,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:07,047 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 00:51:07,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:07,077 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 00:51:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070980654] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:07,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:07,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:51:07,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298755261] [2023-09-01 00:51:07,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:07,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:51:07,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:07,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:51:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:51:07,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-09-01 00:51:07,118 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 00:51:07,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:07,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-09-01 00:51:07,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:07,257 INFO L130 PetriNetUnfolder]: 107/275 cut-off events. [2023-09-01 00:51:07,257 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:51:07,258 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 00:51:07,259 INFO L137 encePairwiseOnDemand]: 432/435 looper letters, 28 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-09-01 00:51:07,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 167 flow [2023-09-01 00:51:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:51:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:51:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1146 transitions. [2023-09-01 00:51:07,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43908045977011495 [2023-09-01 00:51:07,263 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1146 transitions. [2023-09-01 00:51:07,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1146 transitions. [2023-09-01 00:51:07,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:07,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1146 transitions. [2023-09-01 00:51:07,267 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 00:51:07,272 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 00:51:07,273 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 00:51:07,274 INFO L175 Difference]: Start difference. First operand has 65 places, 37 transitions, 89 flow. Second operand 6 states and 1146 transitions. [2023-09-01 00:51:07,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 167 flow [2023-09-01 00:51:07,275 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 00:51:07,276 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 121 flow [2023-09-01 00:51:07,276 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 00:51:07,277 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -23 predicate places. [2023-09-01 00:51:07,277 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 121 flow [2023-09-01 00:51:07,278 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 00:51:07,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:07,279 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:07,285 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 00:51:07,485 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 00:51:07,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:07,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:07,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1952642911, now seen corresponding path program 2 times [2023-09-01 00:51:07,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:07,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300306961] [2023-09-01 00:51:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:07,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:07,630 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 00:51:07,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300306961] [2023-09-01 00:51:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300306961] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:07,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35567166] [2023-09-01 00:51:07,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:51:07,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:07,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:07,632 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 00:51:07,663 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 00:51:07,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:51:07,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:51:07,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:51:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:07,743 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 00:51:07,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:07,794 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 00:51:07,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35567166] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:07,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:07,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:51:07,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089909363] [2023-09-01 00:51:07,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:07,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:51:07,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:51:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:51:07,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-09-01 00:51:07,838 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 00:51:07,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:07,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-09-01 00:51:07,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:07,920 INFO L130 PetriNetUnfolder]: 107/281 cut-off events. [2023-09-01 00:51:07,920 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 00:51:07,921 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 00:51:07,922 INFO L137 encePairwiseOnDemand]: 432/435 looper letters, 28 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2023-09-01 00:51:07,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 235 flow [2023-09-01 00:51:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:51:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:51:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2265 transitions. [2023-09-01 00:51:07,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339080459770115 [2023-09-01 00:51:07,928 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2265 transitions. [2023-09-01 00:51:07,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2265 transitions. [2023-09-01 00:51:07,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:07,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2265 transitions. [2023-09-01 00:51:07,942 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 00:51:07,950 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 00:51:07,953 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 00:51:07,954 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 121 flow. Second operand 12 states and 2265 transitions. [2023-09-01 00:51:07,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 235 flow [2023-09-01 00:51:07,956 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 00:51:07,958 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 191 flow [2023-09-01 00:51:07,958 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 00:51:07,959 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -7 predicate places. [2023-09-01 00:51:07,959 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 191 flow [2023-09-01 00:51:07,962 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 00:51:07,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:07,962 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:07,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 00:51:08,168 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 00:51:08,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:08,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash 408086753, now seen corresponding path program 3 times [2023-09-01 00:51:08,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:08,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558495412] [2023-09-01 00:51:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:08,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:08,204 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:51:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:08,270 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:51:08,270 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:51:08,275 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:51:08,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:51:08,278 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:51:08,280 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:51:08,281 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:51:08,281 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:51:08,322 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:51:08,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:08,378 INFO L130 PetriNetUnfolder]: 75/507 cut-off events. [2023-09-01 00:51:08,379 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 00:51:08,386 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 00:51:08,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:08,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:08,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:51:08,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:08,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:08,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 304 transitions, 626 flow [2023-09-01 00:51:08,469 INFO L130 PetriNetUnfolder]: 75/507 cut-off events. [2023-09-01 00:51:08,469 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 00:51:08,475 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 00:51:08,496 INFO L119 LiptonReduction]: Number of co-enabled transitions 45036 [2023-09-01 00:51:12,744 INFO L134 LiptonReduction]: Checked pairs total: 92835 [2023-09-01 00:51:12,745 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-09-01 00:51:12,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:51:12,747 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;@720e3308, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:51:12,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:51:12,766 INFO L130 PetriNetUnfolder]: 35/150 cut-off events. [2023-09-01 00:51:12,767 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:51:12,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:12,767 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:12,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:12,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:12,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1463582916, now seen corresponding path program 1 times [2023-09-01 00:51:12,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:12,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44624002] [2023-09-01 00:51:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:12,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:12,799 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 00:51:12,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:12,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44624002] [2023-09-01 00:51:12,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44624002] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:51:12,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:51:12,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:51:12,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751086000] [2023-09-01 00:51:12,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:51:12,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:51:12,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:12,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:51:12,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:51:12,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 571 [2023-09-01 00:51:12,810 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 00:51:12,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:12,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 571 [2023-09-01 00:51:12,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:16,114 INFO L130 PetriNetUnfolder]: 23659/39443 cut-off events. [2023-09-01 00:51:16,115 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-09-01 00:51:16,181 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 00:51:16,230 INFO L137 encePairwiseOnDemand]: 529/571 looper letters, 47 selfloop transitions, 2 changer transitions 32/97 dead transitions. [2023-09-01 00:51:16,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 362 flow [2023-09-01 00:51:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:51:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:51:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-09-01 00:51:16,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119673088149446 [2023-09-01 00:51:16,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-09-01 00:51:16,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-09-01 00:51:16,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:16,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-09-01 00:51:16,236 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 00:51:16,239 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 00:51:16,240 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 00:51:16,240 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 877 transitions. [2023-09-01 00:51:16,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 362 flow [2023-09-01 00:51:16,243 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 00:51:16,245 INFO L231 Difference]: Finished difference. Result has 98 places, 65 transitions, 152 flow [2023-09-01 00:51:16,245 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 00:51:16,246 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-09-01 00:51:16,246 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 65 transitions, 152 flow [2023-09-01 00:51:16,246 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 00:51:16,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:16,247 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:16,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:51:16,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:16,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash 969898816, now seen corresponding path program 1 times [2023-09-01 00:51:16,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:16,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899625708] [2023-09-01 00:51:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:16,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:16,287 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 00:51:16,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:16,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899625708] [2023-09-01 00:51:16,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899625708] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:16,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756982266] [2023-09-01 00:51:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:16,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:16,290 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 00:51:16,318 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 00:51:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:16,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:51:16,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:16,390 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 00:51:16,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:16,406 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 00:51:16,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756982266] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:16,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:16,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:51:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287060110] [2023-09-01 00:51:16,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:16,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:51:16,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:51:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:51:16,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 571 [2023-09-01 00:51:16,428 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 00:51:16,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:16,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 571 [2023-09-01 00:51:16,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:17,118 INFO L130 PetriNetUnfolder]: 4492/7777 cut-off events. [2023-09-01 00:51:17,119 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 00:51:17,129 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 00:51:17,147 INFO L137 encePairwiseOnDemand]: 568/571 looper letters, 47 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-09-01 00:51:17,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 268 flow [2023-09-01 00:51:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:51:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:51:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1573 transitions. [2023-09-01 00:51:17,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913601868067716 [2023-09-01 00:51:17,153 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1573 transitions. [2023-09-01 00:51:17,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1573 transitions. [2023-09-01 00:51:17,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:17,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1573 transitions. [2023-09-01 00:51:17,157 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 00:51:17,162 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 00:51:17,163 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 00:51:17,163 INFO L175 Difference]: Start difference. First operand has 98 places, 65 transitions, 152 flow. Second operand 6 states and 1573 transitions. [2023-09-01 00:51:17,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 268 flow [2023-09-01 00:51:17,164 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 00:51:17,165 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 182 flow [2023-09-01 00:51:17,165 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 00:51:17,166 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -27 predicate places. [2023-09-01 00:51:17,166 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 182 flow [2023-09-01 00:51:17,167 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 00:51:17,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:17,167 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:17,176 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 00:51:17,373 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 00:51:17,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:17,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash -513458236, now seen corresponding path program 2 times [2023-09-01 00:51:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:17,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096951558] [2023-09-01 00:51:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:17,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:17,461 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 00:51:17,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:17,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096951558] [2023-09-01 00:51:17,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096951558] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:17,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526703796] [2023-09-01 00:51:17,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:51:17,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:17,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:17,463 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 00:51:17,466 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 00:51:17,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:51:17,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:51:17,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:51:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:17,558 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 00:51:17,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:17,609 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 00:51:17,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526703796] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:17,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:17,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:51:17,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652526677] [2023-09-01 00:51:17,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:17,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:51:17,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:17,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:51:17,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:51:17,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 571 [2023-09-01 00:51:17,648 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 00:51:17,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:17,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 571 [2023-09-01 00:51:17,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:18,337 INFO L130 PetriNetUnfolder]: 4492/7783 cut-off events. [2023-09-01 00:51:18,337 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-09-01 00:51:18,345 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 00:51:18,360 INFO L137 encePairwiseOnDemand]: 568/571 looper letters, 47 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-09-01 00:51:18,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 334 flow [2023-09-01 00:51:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:51:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:51:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3100 transitions. [2023-09-01 00:51:18,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45242265032107415 [2023-09-01 00:51:18,370 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3100 transitions. [2023-09-01 00:51:18,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3100 transitions. [2023-09-01 00:51:18,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:18,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3100 transitions. [2023-09-01 00:51:18,377 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 00:51:18,386 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 00:51:18,388 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 00:51:18,388 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 182 flow. Second operand 12 states and 3100 transitions. [2023-09-01 00:51:18,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 334 flow [2023-09-01 00:51:18,392 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 00:51:18,394 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 252 flow [2023-09-01 00:51:18,395 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 00:51:18,396 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2023-09-01 00:51:18,396 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 252 flow [2023-09-01 00:51:18,398 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 00:51:18,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:18,399 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:18,407 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 00:51:18,606 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 00:51:18,607 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:18,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1592675908, now seen corresponding path program 3 times [2023-09-01 00:51:18,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:18,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420705611] [2023-09-01 00:51:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:18,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:18,635 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:51:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:18,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:51:18,661 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:51:18,662 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:51:18,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:51:18,662 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:51:18,663 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:51:18,663 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:51:18,663 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:51:18,696 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:51:18,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:18,789 INFO L130 PetriNetUnfolder]: 110/747 cut-off events. [2023-09-01 00:51:18,789 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 00:51:18,803 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 00:51:18,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:18,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:18,810 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:51:18,810 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:18,810 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:18,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 387 transitions, 804 flow [2023-09-01 00:51:18,897 INFO L130 PetriNetUnfolder]: 110/747 cut-off events. [2023-09-01 00:51:18,897 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 00:51:18,911 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 00:51:18,943 INFO L119 LiptonReduction]: Number of co-enabled transitions 87966 [2023-09-01 00:51:23,846 INFO L134 LiptonReduction]: Checked pairs total: 186051 [2023-09-01 00:51:23,847 INFO L136 LiptonReduction]: Total number of compositions: 349 [2023-09-01 00:51:23,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:51:23,849 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;@720e3308, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:51:23,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:51:23,871 INFO L130 PetriNetUnfolder]: 62/250 cut-off events. [2023-09-01 00:51:23,871 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:51:23,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:23,871 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:23,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:23,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash -987275449, now seen corresponding path program 1 times [2023-09-01 00:51:23,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:23,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766033794] [2023-09-01 00:51:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:23,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:23,902 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 00:51:23,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:23,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766033794] [2023-09-01 00:51:23,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766033794] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:51:23,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:51:23,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:51:23,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542571680] [2023-09-01 00:51:23,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:51:23,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:51:23,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:51:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:51:23,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 736 [2023-09-01 00:51:23,915 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 00:51:23,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:23,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 736 [2023-09-01 00:51:23,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:52:38,870 INFO L130 PetriNetUnfolder]: 786509/1121323 cut-off events. [2023-09-01 00:52:38,870 INFO L131 PetriNetUnfolder]: For 5919/5919 co-relation queries the response was YES. [2023-09-01 00:52:41,099 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 00:52:42,092 INFO L137 encePairwiseOnDemand]: 682/736 looper letters, 69 selfloop transitions, 2 changer transitions 33/125 dead transitions. [2023-09-01 00:52:42,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 125 transitions, 476 flow [2023-09-01 00:52:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:52:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:52:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-09-01 00:52:42,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2023-09-01 00:52:42,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-09-01 00:52:42,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-09-01 00:52:42,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:52:42,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-09-01 00:52:42,099 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 00:52:42,102 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 00:52:42,103 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 00:52:42,103 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 380 flow. Second operand 3 states and 1116 transitions. [2023-09-01 00:52:42,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 125 transitions, 476 flow [2023-09-01 00:52:42,107 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 00:52:42,109 INFO L231 Difference]: Finished difference. Result has 126 places, 92 transitions, 215 flow [2023-09-01 00:52:42,109 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 00:52:42,110 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -7 predicate places. [2023-09-01 00:52:42,110 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 92 transitions, 215 flow [2023-09-01 00:52:42,110 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 00:52:42,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:52:42,111 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:52:42,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:52:42,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:52:42,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:52:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash 876878394, now seen corresponding path program 1 times [2023-09-01 00:52:42,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:52:42,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264864946] [2023-09-01 00:52:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:52:42,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:52:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:52:42,145 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 00:52:42,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:52:42,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264864946] [2023-09-01 00:52:42,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264864946] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:52:42,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113448822] [2023-09-01 00:52:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:52:42,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:52:42,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:52:42,153 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 00:52:42,154 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 00:52:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:52:42,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:52:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:52:42,251 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 00:52:42,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:52:42,262 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 00:52:42,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113448822] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:52:42,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:52:42,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:52:42,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937540825] [2023-09-01 00:52:42,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:52:42,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:52:42,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:52:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:52:42,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:52:42,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 736 [2023-09-01 00:52:42,282 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 00:52:42,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:52:42,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 736 [2023-09-01 00:52:42,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:52:55,520 INFO L130 PetriNetUnfolder]: 152906/220679 cut-off events. [2023-09-01 00:52:55,520 INFO L131 PetriNetUnfolder]: For 3043/3043 co-relation queries the response was YES. [2023-09-01 00:52:55,924 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 00:52:56,288 INFO L137 encePairwiseOnDemand]: 733/736 looper letters, 69 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-09-01 00:52:56,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 95 transitions, 375 flow [2023-09-01 00:52:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:52:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:52:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2003 transitions. [2023-09-01 00:52:56,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4535778985507246 [2023-09-01 00:52:56,292 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2003 transitions. [2023-09-01 00:52:56,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2003 transitions. [2023-09-01 00:52:56,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:52:56,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2003 transitions. [2023-09-01 00:52:56,298 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 00:52:56,303 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 00:52:56,305 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 00:52:56,305 INFO L175 Difference]: Start difference. First operand has 126 places, 92 transitions, 215 flow. Second operand 6 states and 2003 transitions. [2023-09-01 00:52:56,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 95 transitions, 375 flow [2023-09-01 00:52:56,308 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 00:52:56,310 INFO L231 Difference]: Finished difference. Result has 104 places, 95 transitions, 241 flow [2023-09-01 00:52:56,310 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 00:52:56,310 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -29 predicate places. [2023-09-01 00:52:56,311 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 95 transitions, 241 flow [2023-09-01 00:52:56,311 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 00:52:56,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:52:56,312 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:52:56,325 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 00:52:56,521 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 00:52:56,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:52:56,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:52:56,521 INFO L85 PathProgramCache]: Analyzing trace with hash 66585607, now seen corresponding path program 2 times [2023-09-01 00:52:56,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:52:56,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260148875] [2023-09-01 00:52:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:52:56,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:52:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:52:56,592 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 00:52:56,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:52:56,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260148875] [2023-09-01 00:52:56,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260148875] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:52:56,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156289324] [2023-09-01 00:52:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:52:56,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:52:56,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:52:56,595 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 00:52:56,597 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 00:52:56,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:52:56,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:52:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:52:56,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:52:56,723 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 00:52:56,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:52:56,778 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 00:52:56,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156289324] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:52:56,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:52:56,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:52:56,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959686493] [2023-09-01 00:52:56,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:52:56,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:52:56,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:52:56,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:52:56,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:52:56,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 736 [2023-09-01 00:52:56,822 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 00:52:56,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:52:56,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 736 [2023-09-01 00:52:56,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:53:10,831 INFO L130 PetriNetUnfolder]: 152906/220685 cut-off events. [2023-09-01 00:53:10,831 INFO L131 PetriNetUnfolder]: For 1318/1318 co-relation queries the response was YES. [2023-09-01 00:53:11,377 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 00:53:11,714 INFO L137 encePairwiseOnDemand]: 733/736 looper letters, 69 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-09-01 00:53:11,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 101 transitions, 437 flow [2023-09-01 00:53:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:53:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:53:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3938 transitions. [2023-09-01 00:53:11,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458786231884058 [2023-09-01 00:53:11,723 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3938 transitions. [2023-09-01 00:53:11,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3938 transitions. [2023-09-01 00:53:11,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:53:11,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3938 transitions. [2023-09-01 00:53:11,732 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 00:53:11,742 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 00:53:11,743 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 00:53:11,743 INFO L175 Difference]: Start difference. First operand has 104 places, 95 transitions, 241 flow. Second operand 12 states and 3938 transitions. [2023-09-01 00:53:11,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 101 transitions, 437 flow [2023-09-01 00:53:11,745 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 00:53:11,747 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 311 flow [2023-09-01 00:53:11,747 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 00:53:11,748 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -13 predicate places. [2023-09-01 00:53:11,748 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 311 flow [2023-09-01 00:53:11,749 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 00:53:11,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:53:11,749 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:53:11,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 00:53:11,955 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 00:53:11,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:53:11,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:53:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2090121433, now seen corresponding path program 3 times [2023-09-01 00:53:11,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:53:11,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159016575] [2023-09-01 00:53:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:53:11,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:53:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:53:11,996 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:53:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:53:12,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:53:12,040 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:53:12,040 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:53:12,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:53:12,041 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:53:12,043 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:53:12,043 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:53:12,043 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 00:53:12,085 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:53:12,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:12,227 INFO L130 PetriNetUnfolder]: 157/1071 cut-off events. [2023-09-01 00:53:12,227 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 00:53:12,248 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 00:53:12,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:12,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:12,256 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:53:12,256 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:12,256 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:12,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 406 places, 470 transitions, 984 flow [2023-09-01 00:53:12,371 INFO L130 PetriNetUnfolder]: 157/1071 cut-off events. [2023-09-01 00:53:12,371 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 00:53:12,391 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 00:53:12,452 INFO L119 LiptonReduction]: Number of co-enabled transitions 144504 [2023-09-01 00:53:18,172 INFO L134 LiptonReduction]: Checked pairs total: 312836 [2023-09-01 00:53:18,172 INFO L136 LiptonReduction]: Total number of compositions: 416 [2023-09-01 00:53:18,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:53:18,174 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;@720e3308, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:53:18,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:53:18,200 INFO L130 PetriNetUnfolder]: 83/347 cut-off events. [2023-09-01 00:53:18,201 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 00:53:18,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:53:18,201 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:53:18,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:53:18,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:53:18,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1233653470, now seen corresponding path program 1 times [2023-09-01 00:53:18,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:53:18,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927602785] [2023-09-01 00:53:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:53:18,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:53:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:53:18,230 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 00:53:18,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:53:18,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927602785] [2023-09-01 00:53:18,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927602785] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:53:18,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:53:18,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:53:18,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041524389] [2023-09-01 00:53:18,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:53:18,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:53:18,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:53:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:53:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:53:18,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 886 [2023-09-01 00:53:18,241 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 00:53:18,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:53:18,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 886 [2023-09-01 00:53:18,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand