./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_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_74-tricky_address1_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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --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 00:49:45,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:49:45,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:49:45,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:49:45,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:49:45,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:49:45,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:49:45,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:49:45,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:49:45,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:49:45,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:49:45,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:49:45,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:49:45,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:49:45,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:49:45,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:49:45,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:49:45,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:49:45,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:49:45,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:49:45,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:49:45,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:49:45,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:49:45,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:49:45,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:49:45,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:49:45,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:49:45,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:49:45,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:49:45,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:49:45,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:49:45,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:49:45,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:49:45,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:49:45,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:49:45,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:49:45,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:49:45,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:49:45,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:49:45,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:49:45,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:49:45,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:49:45,726 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:49:45,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:49:45,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:49:45,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:49:45,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:49:45,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:49:45,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:49:45,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:49:45,729 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:49:45,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:49:45,730 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:49:45,730 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:49:45,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:49:45,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:49:45,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:49:45,730 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:49:45,730 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:49:45,731 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:49:45,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:49:45,731 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:49:45,731 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:49:45,731 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:49:45,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:49:45,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:49:45,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:49:45,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:49:45,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:49:45,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:49:45,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:49:45,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:49:45,732 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:49:45,736 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:49:45,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:49:45,737 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:49:45,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:49:45,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:49:45,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:49:45,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:49:45,974 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:49:45,974 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:49:45,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-09-01 00:49:46,869 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:49:47,104 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:49:47,105 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-09-01 00:49:47,118 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6a126f82/22fae6bdc8ac4063b6db9a0d9f0283b0/FLAGb02187d06 [2023-09-01 00:49:47,137 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6a126f82/22fae6bdc8ac4063b6db9a0d9f0283b0 [2023-09-01 00:49:47,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:49:47,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:49:47,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:49:47,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:49:47,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:49:47,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7962d7f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47, skipping insertion in model container [2023-09-01 00:49:47,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:49:47,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:49:47,489 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_74-tricky_address1_racefree.i[41323,41336] [2023-09-01 00:49:47,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:49:47,525 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:49:47,553 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_74-tricky_address1_racefree.i[41323,41336] [2023-09-01 00:49:47,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:49:47,634 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:49:47,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47 WrapperNode [2023-09-01 00:49:47,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:49:47,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:49:47,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:49:47,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:49:47,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,679 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 190 [2023-09-01 00:49:47,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:49:47,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:49:47,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:49:47,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:49:47,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:49:47,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:49:47,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:49:47,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:49:47,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (1/1) ... [2023-09-01 00:49:47,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:49:47,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:47,729 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 00:49:47,736 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 00:49:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:49:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:49:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:49:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:49:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:49:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:49:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:49:47,756 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:49:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:49:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:49:47,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:49:47,757 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 00:49:47,905 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:49:47,907 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:49:48,186 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:49:48,199 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:49:48,199 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 00:49:48,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:49:48 BoogieIcfgContainer [2023-09-01 00:49:48,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:49:48,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:49:48,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:49:48,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:49:48,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:49:47" (1/3) ... [2023-09-01 00:49:48,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67887b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:49:48, skipping insertion in model container [2023-09-01 00:49:48,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:47" (2/3) ... [2023-09-01 00:49:48,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67887b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:49:48, skipping insertion in model container [2023-09-01 00:49:48,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:49:48" (3/3) ... [2023-09-01 00:49:48,208 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-09-01 00:49:48,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:49:48,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-09-01 00:49:48,219 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:49:48,293 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:49:48,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 218 transitions, 444 flow [2023-09-01 00:49:48,421 INFO L130 PetriNetUnfolder]: 45/305 cut-off events. [2023-09-01 00:49:48,422 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 00:49:48,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 305 events. 45/305 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1160 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-09-01 00:49:48,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 218 transitions, 444 flow [2023-09-01 00:49:48,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 213 transitions, 431 flow [2023-09-01 00:49:48,436 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:49:48,446 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 213 transitions, 431 flow [2023-09-01 00:49:48,449 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 213 transitions, 431 flow [2023-09-01 00:49:48,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 431 flow [2023-09-01 00:49:48,489 INFO L130 PetriNetUnfolder]: 44/300 cut-off events. [2023-09-01 00:49:48,489 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:49:48,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 300 events. 44/300 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1124 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-09-01 00:49:48,495 INFO L119 LiptonReduction]: Number of co-enabled transitions 14508 [2023-09-01 00:49:51,456 INFO L134 LiptonReduction]: Checked pairs total: 29120 [2023-09-01 00:49:51,456 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-09-01 00:49:51,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:49:51,469 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;@3a159c7d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:49:51,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:49:51,473 INFO L130 PetriNetUnfolder]: 8/45 cut-off events. [2023-09-01 00:49:51,473 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:49:51,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:51,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 00:49:51,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:51,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1883039473, now seen corresponding path program 1 times [2023-09-01 00:49:51,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:51,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978931672] [2023-09-01 00:49:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:51,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:51,681 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 00:49:51,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:51,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978931672] [2023-09-01 00:49:51,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978931672] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:49:51,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:49:51,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:49:51,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077568619] [2023-09-01 00:49:51,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:49:51,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:49:51,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:51,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:49:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:49:51,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 416 [2023-09-01 00:49:51,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 91 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 00:49:51,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:51,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 416 [2023-09-01 00:49:51,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:51,968 INFO L130 PetriNetUnfolder]: 620/1405 cut-off events. [2023-09-01 00:49:51,968 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:49:51,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1405 events. 620/1405 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9178 event pairs, 570 based on Foata normal form. 104/1006 useless extension candidates. Maximal degree in co-relation 2555. Up to 1223 conditions per place. [2023-09-01 00:49:51,972 INFO L137 encePairwiseOnDemand]: 386/416 looper letters, 27 selfloop transitions, 2 changer transitions 28/65 dead transitions. [2023-09-01 00:49:51,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 243 flow [2023-09-01 00:49:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:49:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:49:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-09-01 00:49:51,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056089743589743 [2023-09-01 00:49:51,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-09-01 00:49:51,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-09-01 00:49:51,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:51,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-09-01 00:49:51,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 00:49:51,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 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 00:49:51,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 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 00:49:51,999 INFO L175 Difference]: Start difference. First operand has 70 places, 91 transitions, 187 flow. Second operand 3 states and 631 transitions. [2023-09-01 00:49:52,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 243 flow [2023-09-01 00:49:52,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:49:52,004 INFO L231 Difference]: Finished difference. Result has 67 places, 37 transitions, 89 flow [2023-09-01 00:49:52,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=67, PETRI_TRANSITIONS=37} [2023-09-01 00:49:52,009 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -3 predicate places. [2023-09-01 00:49:52,009 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 37 transitions, 89 flow [2023-09-01 00:49:52,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 00:49:52,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:52,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:49:52,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:49:52,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:52,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:52,016 INFO L85 PathProgramCache]: Analyzing trace with hash -860209746, now seen corresponding path program 1 times [2023-09-01 00:49:52,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:52,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687623261] [2023-09-01 00:49:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:52,103 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 00:49:52,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:52,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687623261] [2023-09-01 00:49:52,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687623261] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:49:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133224222] [2023-09-01 00:49:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:52,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:49:52,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:52,112 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 00:49:52,124 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 00:49:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:49:52,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:49:52,243 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 00:49:52,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:49:52,253 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 00:49:52,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133224222] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:49:52,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:49:52,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:49:52,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819666191] [2023-09-01 00:49:52,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:49:52,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:49:52,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:52,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:49:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:49:52,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 416 [2023-09-01 00:49:52,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 37 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 183.57142857142858) internal successors, (1285), 7 states have internal predecessors, (1285), 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 00:49:52,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:52,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 416 [2023-09-01 00:49:52,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:52,357 INFO L130 PetriNetUnfolder]: 102/270 cut-off events. [2023-09-01 00:49:52,358 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:49:52,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 270 events. 102/270 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1158 event pairs, 95 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 501. Up to 223 conditions per place. [2023-09-01 00:49:52,360 INFO L137 encePairwiseOnDemand]: 413/416 looper letters, 27 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-09-01 00:49:52,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 165 flow [2023-09-01 00:49:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:49:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:49:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1127 transitions. [2023-09-01 00:49:52,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4515224358974359 [2023-09-01 00:49:52,363 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1127 transitions. [2023-09-01 00:49:52,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1127 transitions. [2023-09-01 00:49:52,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:52,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1127 transitions. [2023-09-01 00:49:52,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 187.83333333333334) internal successors, (1127), 6 states have internal predecessors, (1127), 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 00:49:52,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 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 00:49:52,369 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 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 00:49:52,369 INFO L175 Difference]: Start difference. First operand has 67 places, 37 transitions, 89 flow. Second operand 6 states and 1127 transitions. [2023-09-01 00:49:52,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 165 flow [2023-09-01 00:49:52,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 161 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 00:49:52,371 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 121 flow [2023-09-01 00:49:52,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, 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 00:49:52,372 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -23 predicate places. [2023-09-01 00:49:52,373 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 121 flow [2023-09-01 00:49:52,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.57142857142858) internal successors, (1285), 7 states have internal predecessors, (1285), 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 00:49:52,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:52,374 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 00:49:52,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 00:49:52,578 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 00:49:52,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:52,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1346055729, now seen corresponding path program 2 times [2023-09-01 00:49:52,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:52,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632704978] [2023-09-01 00:49:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:52,689 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 00:49:52,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:52,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632704978] [2023-09-01 00:49:52,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632704978] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:49:52,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681957959] [2023-09-01 00:49:52,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:49:52,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:49:52,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:52,694 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 00:49:52,717 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 00:49:52,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:49:52,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:49:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:49:52,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:49:52,768 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 00:49:52,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:49:52,805 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 00:49:52,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681957959] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:49:52,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:49:52,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:49:52,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187954785] [2023-09-01 00:49:52,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:49:52,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:49:52,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:49:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:49:52,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 416 [2023-09-01 00:49:52,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 121 flow. Second operand has 13 states, 13 states have (on average 183.30769230769232) internal successors, (2383), 13 states have internal predecessors, (2383), 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 00:49:52,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:52,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 416 [2023-09-01 00:49:52,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:52,933 INFO L130 PetriNetUnfolder]: 102/276 cut-off events. [2023-09-01 00:49:52,934 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 00:49:52,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 276 events. 102/276 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1158 event pairs, 95 based on Foata normal form. 6/177 useless extension candidates. Maximal degree in co-relation 492. Up to 223 conditions per place. [2023-09-01 00:49:52,935 INFO L137 encePairwiseOnDemand]: 413/416 looper letters, 27 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2023-09-01 00:49:52,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 233 flow [2023-09-01 00:49:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:49:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:49:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2228 transitions. [2023-09-01 00:49:52,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463141025641026 [2023-09-01 00:49:52,939 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2228 transitions. [2023-09-01 00:49:52,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2228 transitions. [2023-09-01 00:49:52,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:52,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2228 transitions. [2023-09-01 00:49:52,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 185.66666666666666) internal successors, (2228), 12 states have internal predecessors, (2228), 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 00:49:52,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 416.0) internal successors, (5408), 13 states have internal predecessors, (5408), 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 00:49:52,950 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 416.0) internal successors, (5408), 13 states have internal predecessors, (5408), 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 00:49:52,950 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 121 flow. Second operand 12 states and 2228 transitions. [2023-09-01 00:49:52,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 233 flow [2023-09-01 00:49:52,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 219 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:49:52,952 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 191 flow [2023-09-01 00:49:52,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, 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 00:49:52,952 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -7 predicate places. [2023-09-01 00:49:52,953 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 191 flow [2023-09-01 00:49:52,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.30769230769232) internal successors, (2383), 13 states have internal predecessors, (2383), 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 00:49:52,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:52,953 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 00:49:52,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 00:49:53,160 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 00:49:53,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:53,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:53,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1458375953, now seen corresponding path program 3 times [2023-09-01 00:49:53,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:53,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232244095] [2023-09-01 00:49:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:53,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:49:53,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:49:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:49:53,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:49:53,226 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:49:53,229 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:49:53,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:49:53,231 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:49:53,232 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:49:53,232 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:49:53,232 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:49:53,263 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:49:53,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 298 transitions, 614 flow [2023-09-01 00:49:53,320 INFO L130 PetriNetUnfolder]: 75/501 cut-off events. [2023-09-01 00:49:53,321 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 00:49:53,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 75/501 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2292 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 307. Up to 12 conditions per place. [2023-09-01 00:49:53,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 298 transitions, 614 flow [2023-09-01 00:49:53,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 298 transitions, 614 flow [2023-09-01 00:49:53,326 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:49:53,326 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 298 transitions, 614 flow [2023-09-01 00:49:53,327 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 298 transitions, 614 flow [2023-09-01 00:49:53,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 298 transitions, 614 flow [2023-09-01 00:49:53,359 INFO L130 PetriNetUnfolder]: 75/501 cut-off events. [2023-09-01 00:49:53,359 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 00:49:53,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 75/501 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2292 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 307. Up to 12 conditions per place. [2023-09-01 00:49:53,377 INFO L119 LiptonReduction]: Number of co-enabled transitions 42900 [2023-09-01 00:49:56,796 INFO L134 LiptonReduction]: Checked pairs total: 90194 [2023-09-01 00:49:56,796 INFO L136 LiptonReduction]: Total number of compositions: 270 [2023-09-01 00:49:56,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:49:56,798 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;@3a159c7d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:49:56,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:49:56,808 INFO L130 PetriNetUnfolder]: 38/158 cut-off events. [2023-09-01 00:49:56,809 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:49:56,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:56,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:49:56,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:56,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1842105687, now seen corresponding path program 1 times [2023-09-01 00:49:56,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:56,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066586537] [2023-09-01 00:49:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:56,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:56,829 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 00:49:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066586537] [2023-09-01 00:49:56,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066586537] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:49:56,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:49:56,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:49:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244680158] [2023-09-01 00:49:56,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:49:56,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:49:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:49:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:49:56,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 568 [2023-09-01 00:49:56,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 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 00:49:56,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:56,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 568 [2023-09-01 00:49:56,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:59,296 INFO L130 PetriNetUnfolder]: 28221/45403 cut-off events. [2023-09-01 00:49:59,296 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-09-01 00:49:59,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86992 conditions, 45403 events. 28221/45403 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 374253 event pairs, 26736 based on Foata normal form. 3624/32165 useless extension candidates. Maximal degree in co-relation 35357. Up to 41457 conditions per place. [2023-09-01 00:49:59,390 INFO L137 encePairwiseOnDemand]: 526/568 looper letters, 50 selfloop transitions, 2 changer transitions 32/97 dead transitions. [2023-09-01 00:49:59,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 370 flow [2023-09-01 00:49:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:49:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:49:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2023-09-01 00:49:59,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064553990610329 [2023-09-01 00:49:59,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2023-09-01 00:49:59,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2023-09-01 00:49:59,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:59,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2023-09-01 00:49:59,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 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 00:49:59,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 00:49:59,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 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 00:49:59,397 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 863 transitions. [2023-09-01 00:49:59,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 370 flow [2023-09-01 00:49:59,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:49:59,404 INFO L231 Difference]: Finished difference. Result has 98 places, 65 transitions, 152 flow [2023-09-01 00:49:59,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, 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 00:49:59,406 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-09-01 00:49:59,406 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 65 transitions, 152 flow [2023-09-01 00:49:59,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 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 00:49:59,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:59,407 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:49:59,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:49:59,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:59,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2053159031, now seen corresponding path program 1 times [2023-09-01 00:49:59,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:59,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361137035] [2023-09-01 00:49:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:59,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:59,435 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 00:49:59,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:59,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361137035] [2023-09-01 00:49:59,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361137035] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:49:59,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829322553] [2023-09-01 00:49:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:59,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:49:59,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:59,437 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 00:49:59,445 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 00:49:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:59,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:49:59,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:49:59,510 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 00:49:59,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:49:59,520 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 00:49:59,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829322553] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:49:59,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:49:59,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:49:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240188025] [2023-09-01 00:49:59,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:49:59,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:49:59,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:49:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:49:59,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 568 [2023-09-01 00:49:59,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 65 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 248.71428571428572) internal successors, (1741), 7 states have internal predecessors, (1741), 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 00:49:59,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:59,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 568 [2023-09-01 00:49:59,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:50:00,107 INFO L130 PetriNetUnfolder]: 5186/8629 cut-off events. [2023-09-01 00:50:00,107 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-09-01 00:50:00,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16580 conditions, 8629 events. 5186/8629 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59725 event pairs, 4945 based on Foata normal form. 0/5200 useless extension candidates. Maximal degree in co-relation 16567. Up to 7851 conditions per place. [2023-09-01 00:50:00,130 INFO L137 encePairwiseOnDemand]: 565/568 looper letters, 50 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-09-01 00:50:00,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 274 flow [2023-09-01 00:50:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:50:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:50:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1540 transitions. [2023-09-01 00:50:00,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518779342723005 [2023-09-01 00:50:00,138 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1540 transitions. [2023-09-01 00:50:00,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1540 transitions. [2023-09-01 00:50:00,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:50:00,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1540 transitions. [2023-09-01 00:50:00,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.6666666666667) internal successors, (1540), 6 states have internal predecessors, (1540), 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 00:50:00,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 568.0) internal successors, (3976), 7 states have internal predecessors, (3976), 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 00:50:00,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 568.0) internal successors, (3976), 7 states have internal predecessors, (3976), 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 00:50:00,149 INFO L175 Difference]: Start difference. First operand has 98 places, 65 transitions, 152 flow. Second operand 6 states and 1540 transitions. [2023-09-01 00:50:00,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 274 flow [2023-09-01 00:50:00,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 268 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 00:50:00,151 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 182 flow [2023-09-01 00:50:00,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, 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 00:50:00,154 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -27 predicate places. [2023-09-01 00:50:00,154 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 182 flow [2023-09-01 00:50:00,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 248.71428571428572) internal successors, (1741), 7 states have internal predecessors, (1741), 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 00:50:00,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:00,155 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:50:00,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 00:50:00,359 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 00:50:00,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:00,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:00,360 INFO L85 PathProgramCache]: Analyzing trace with hash -622728535, now seen corresponding path program 2 times [2023-09-01 00:50:00,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:00,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966715163] [2023-09-01 00:50:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:00,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:00,450 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 00:50:00,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:50:00,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966715163] [2023-09-01 00:50:00,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966715163] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:50:00,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486039525] [2023-09-01 00:50:00,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:50:00,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:50:00,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:50:00,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:50:00,455 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 00:50:00,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:50:00,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:50:00,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:50:00,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:50:00,542 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 00:50:00,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:50:00,584 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 00:50:00,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486039525] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:50:00,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:50:00,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:50:00,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014333196] [2023-09-01 00:50:00,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:50:00,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:50:00,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:50:00,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:50:00,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:50:00,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 568 [2023-09-01 00:50:00,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 182 flow. Second operand has 13 states, 13 states have (on average 248.3846153846154) internal successors, (3229), 13 states have internal predecessors, (3229), 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 00:50:00,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:50:00,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 568 [2023-09-01 00:50:00,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:50:01,146 INFO L130 PetriNetUnfolder]: 5186/8635 cut-off events. [2023-09-01 00:50:01,146 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-09-01 00:50:01,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16608 conditions, 8635 events. 5186/8635 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59694 event pairs, 4945 based on Foata normal form. 6/5213 useless extension candidates. Maximal degree in co-relation 16549. Up to 7851 conditions per place. [2023-09-01 00:50:01,171 INFO L137 encePairwiseOnDemand]: 565/568 looper letters, 50 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-09-01 00:50:01,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 340 flow [2023-09-01 00:50:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:50:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:50:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3031 transitions. [2023-09-01 00:50:01,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44468896713615025 [2023-09-01 00:50:01,177 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3031 transitions. [2023-09-01 00:50:01,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3031 transitions. [2023-09-01 00:50:01,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:50:01,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3031 transitions. [2023-09-01 00:50:01,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 252.58333333333334) internal successors, (3031), 12 states have internal predecessors, (3031), 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 00:50:01,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 568.0) internal successors, (7384), 13 states have internal predecessors, (7384), 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 00:50:01,189 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 568.0) internal successors, (7384), 13 states have internal predecessors, (7384), 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 00:50:01,189 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 182 flow. Second operand 12 states and 3031 transitions. [2023-09-01 00:50:01,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 340 flow [2023-09-01 00:50:01,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 74 transitions, 326 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:50:01,191 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 252 flow [2023-09-01 00:50:01,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, 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 00:50:01,191 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2023-09-01 00:50:01,192 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 252 flow [2023-09-01 00:50:01,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 248.3846153846154) internal successors, (3229), 13 states have internal predecessors, (3229), 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 00:50:01,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:01,193 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:50:01,197 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 00:50:01,397 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 00:50:01,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:01,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:01,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1060454743, now seen corresponding path program 3 times [2023-09-01 00:50:01,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:01,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677114964] [2023-09-01 00:50:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:01,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:50:01,417 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:50:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:50:01,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:50:01,436 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:50:01,437 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:50:01,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:50:01,437 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:50:01,438 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:50:01,438 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:50:01,438 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:50:01,468 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:50:01,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 378 transitions, 786 flow [2023-09-01 00:50:01,574 INFO L130 PetriNetUnfolder]: 110/738 cut-off events. [2023-09-01 00:50:01,574 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 00:50:01,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 738 events. 110/738 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3676 event pairs, 1 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-09-01 00:50:01,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 378 transitions, 786 flow [2023-09-01 00:50:01,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 378 transitions, 786 flow [2023-09-01 00:50:01,585 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:50:01,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 378 transitions, 786 flow [2023-09-01 00:50:01,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 378 transitions, 786 flow [2023-09-01 00:50:01,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 378 transitions, 786 flow [2023-09-01 00:50:01,648 INFO L130 PetriNetUnfolder]: 110/738 cut-off events. [2023-09-01 00:50:01,648 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 00:50:01,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 738 events. 110/738 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3676 event pairs, 1 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-09-01 00:50:01,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 83304 [2023-09-01 00:50:05,539 INFO L134 LiptonReduction]: Checked pairs total: 180304 [2023-09-01 00:50:05,539 INFO L136 LiptonReduction]: Total number of compositions: 336 [2023-09-01 00:50:05,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:50:05,540 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;@3a159c7d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:50:05,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:50:05,553 INFO L130 PetriNetUnfolder]: 65/254 cut-off events. [2023-09-01 00:50:05,553 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:50:05,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:05,553 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:50:05,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:05,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1165658396, now seen corresponding path program 1 times [2023-09-01 00:50:05,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:05,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127096647] [2023-09-01 00:50:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:05,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:05,574 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 00:50:05,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:50:05,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127096647] [2023-09-01 00:50:05,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127096647] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:50:05,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:50:05,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:50:05,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621576562] [2023-09-01 00:50:05,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:50:05,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:50:05,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:50:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:50:05,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:50:05,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 714 [2023-09-01 00:50:05,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 176 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 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 00:50:05,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:50:05,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 714 [2023-09-01 00:50:05,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:08,576 INFO L130 PetriNetUnfolder]: 777850/1123233 cut-off events. [2023-09-01 00:51:08,576 INFO L131 PetriNetUnfolder]: For 5761/5761 co-relation queries the response was YES. [2023-09-01 00:51:10,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146074 conditions, 1123233 events. 777850/1123233 cut-off events. For 5761/5761 co-relation queries the response was YES. Maximal size of possible extension queue 37372. Compared 10903039 event pairs, 746989 based on Foata normal form. 95850/858414 useless extension candidates. Maximal degree in co-relation 222429. Up to 1019198 conditions per place. [2023-09-01 00:51:11,765 INFO L137 encePairwiseOnDemand]: 659/714 looper letters, 68 selfloop transitions, 2 changer transitions 33/125 dead transitions. [2023-09-01 00:51:11,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 125 transitions, 476 flow [2023-09-01 00:51:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:51:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:51:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1090 transitions. [2023-09-01 00:51:11,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088702147525677 [2023-09-01 00:51:11,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1090 transitions. [2023-09-01 00:51:11,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1090 transitions. [2023-09-01 00:51:11,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:11,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1090 transitions. [2023-09-01 00:51:11,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.3333333333333) internal successors, (1090), 3 states have internal predecessors, (1090), 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 00:51:11,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 714.0) internal successors, (2856), 4 states have internal predecessors, (2856), 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 00:51:11,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 714.0) internal successors, (2856), 4 states have internal predecessors, (2856), 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 00:51:11,773 INFO L175 Difference]: Start difference. First operand has 133 places, 176 transitions, 382 flow. Second operand 3 states and 1090 transitions. [2023-09-01 00:51:11,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 125 transitions, 476 flow [2023-09-01 00:51:11,775 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 00:51:11,777 INFO L231 Difference]: Finished difference. Result has 126 places, 92 transitions, 215 flow [2023-09-01 00:51:11,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, 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 00:51:11,777 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -7 predicate places. [2023-09-01 00:51:11,777 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 92 transitions, 215 flow [2023-09-01 00:51:11,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 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 00:51:11,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:11,778 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:11,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:51:11,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:11,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash 623555628, now seen corresponding path program 1 times [2023-09-01 00:51:11,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:11,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319709237] [2023-09-01 00:51:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:11,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:11,813 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 00:51:11,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:11,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319709237] [2023-09-01 00:51:11,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319709237] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:11,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125694627] [2023-09-01 00:51:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:11,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:11,816 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 00:51:11,817 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 00:51:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:11,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:51:11,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:11,898 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 00:51:11,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:11,906 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 00:51:11,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125694627] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:11,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:11,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:51:11,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29647621] [2023-09-01 00:51:11,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:11,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:51:11,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:11,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:51:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:51:11,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 714 [2023-09-01 00:51:11,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 92 transitions, 215 flow. Second operand has 7 states, 7 states have (on average 313.85714285714283) internal successors, (2197), 7 states have internal predecessors, (2197), 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 00:51:11,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:11,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 714 [2023-09-01 00:51:11,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:23,954 INFO L130 PetriNetUnfolder]: 146240/213986 cut-off events. [2023-09-01 00:51:23,954 INFO L131 PetriNetUnfolder]: For 3082/3082 co-relation queries the response was YES. [2023-09-01 00:51:24,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409606 conditions, 213986 events. 146240/213986 cut-off events. For 3082/3082 co-relation queries the response was YES. Maximal size of possible extension queue 8321. Compared 1831385 event pairs, 140275 based on Foata normal form. 0/141482 useless extension candidates. Maximal degree in co-relation 409592. Up to 193329 conditions per place. [2023-09-01 00:51:24,808 INFO L137 encePairwiseOnDemand]: 711/714 looper letters, 68 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-09-01 00:51:24,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 95 transitions, 373 flow [2023-09-01 00:51:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:51:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:51:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1948 transitions. [2023-09-01 00:51:24,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45471521942110177 [2023-09-01 00:51:24,812 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1948 transitions. [2023-09-01 00:51:24,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1948 transitions. [2023-09-01 00:51:24,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:24,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1948 transitions. [2023-09-01 00:51:24,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 324.6666666666667) internal successors, (1948), 6 states have internal predecessors, (1948), 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 00:51:24,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 714.0) internal successors, (4998), 7 states have internal predecessors, (4998), 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 00:51:24,820 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 714.0) internal successors, (4998), 7 states have internal predecessors, (4998), 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 00:51:24,820 INFO L175 Difference]: Start difference. First operand has 126 places, 92 transitions, 215 flow. Second operand 6 states and 1948 transitions. [2023-09-01 00:51:24,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 95 transitions, 373 flow [2023-09-01 00:51:24,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 95 transitions, 363 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 00:51:24,824 INFO L231 Difference]: Finished difference. Result has 104 places, 95 transitions, 241 flow [2023-09-01 00:51:24,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, 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 00:51:24,825 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -29 predicate places. [2023-09-01 00:51:24,825 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 95 transitions, 241 flow [2023-09-01 00:51:24,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 313.85714285714283) internal successors, (2197), 7 states have internal predecessors, (2197), 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 00:51:24,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:24,825 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:24,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 00:51:25,030 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 00:51:25,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:25,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:25,030 INFO L85 PathProgramCache]: Analyzing trace with hash -978006756, now seen corresponding path program 2 times [2023-09-01 00:51:25,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:25,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634447275] [2023-09-01 00:51:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:25,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:25,093 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 00:51:25,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634447275] [2023-09-01 00:51:25,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634447275] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292263458] [2023-09-01 00:51:25,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:51:25,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:25,095 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 00:51:25,097 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 00:51:25,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:51:25,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:51:25,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:51:25,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:25,194 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 00:51:25,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:25,229 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 00:51:25,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292263458] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:25,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:25,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:51:25,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129868925] [2023-09-01 00:51:25,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:25,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:51:25,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:51:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:51:25,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 714 [2023-09-01 00:51:25,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 95 transitions, 241 flow. Second operand has 13 states, 13 states have (on average 313.46153846153845) internal successors, (4075), 13 states have internal predecessors, (4075), 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 00:51:25,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:25,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 714 [2023-09-01 00:51:25,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:37,478 INFO L130 PetriNetUnfolder]: 146240/213992 cut-off events. [2023-09-01 00:51:37,479 INFO L131 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2023-09-01 00:51:38,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408871 conditions, 213992 events. 146240/213992 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 8321. Compared 1831157 event pairs, 140275 based on Foata normal form. 6/141495 useless extension candidates. Maximal degree in co-relation 408811. Up to 193329 conditions per place. [2023-09-01 00:51:38,551 INFO L137 encePairwiseOnDemand]: 711/714 looper letters, 68 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-09-01 00:51:38,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 101 transitions, 435 flow [2023-09-01 00:51:38,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:51:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:51:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3829 transitions. [2023-09-01 00:51:38,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44689542483660133 [2023-09-01 00:51:38,557 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3829 transitions. [2023-09-01 00:51:38,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3829 transitions. [2023-09-01 00:51:38,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:38,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3829 transitions. [2023-09-01 00:51:38,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 319.0833333333333) internal successors, (3829), 12 states have internal predecessors, (3829), 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 00:51:38,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 714.0) internal successors, (9282), 13 states have internal predecessors, (9282), 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 00:51:38,569 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 714.0) internal successors, (9282), 13 states have internal predecessors, (9282), 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 00:51:38,569 INFO L175 Difference]: Start difference. First operand has 104 places, 95 transitions, 241 flow. Second operand 12 states and 3829 transitions. [2023-09-01 00:51:38,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 101 transitions, 435 flow [2023-09-01 00:51:38,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 101 transitions, 421 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:51:38,572 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 311 flow [2023-09-01 00:51:38,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, 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 00:51:38,573 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -13 predicate places. [2023-09-01 00:51:38,573 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 311 flow [2023-09-01 00:51:38,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 313.46153846153845) internal successors, (4075), 13 states have internal predecessors, (4075), 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 00:51:38,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:38,574 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:38,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 00:51:38,778 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 00:51:38,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:38,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1431276772, now seen corresponding path program 3 times [2023-09-01 00:51:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:38,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439854179] [2023-09-01 00:51:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:38,796 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:51:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:38,828 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:51:38,829 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:51:38,829 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:51:38,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:51:38,830 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:51:38,831 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:51:38,831 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:51:38,831 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 00:51:38,862 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:51:38,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 458 transitions, 960 flow [2023-09-01 00:51:38,982 INFO L130 PetriNetUnfolder]: 157/1059 cut-off events. [2023-09-01 00:51:38,982 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 00:51:39,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 1059 events. 157/1059 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5671 event pairs, 6 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 758. Up to 32 conditions per place. [2023-09-01 00:51:39,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 394 places, 458 transitions, 960 flow [2023-09-01 00:51:39,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 458 transitions, 960 flow [2023-09-01 00:51:39,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:51:39,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 394 places, 458 transitions, 960 flow [2023-09-01 00:51:39,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 394 places, 458 transitions, 960 flow [2023-09-01 00:51:39,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 458 transitions, 960 flow [2023-09-01 00:51:39,120 INFO L130 PetriNetUnfolder]: 157/1059 cut-off events. [2023-09-01 00:51:39,120 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 00:51:39,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 1059 events. 157/1059 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5671 event pairs, 6 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 758. Up to 32 conditions per place. [2023-09-01 00:51:39,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 136344 [2023-09-01 00:51:44,053 INFO L134 LiptonReduction]: Checked pairs total: 306318 [2023-09-01 00:51:44,053 INFO L136 LiptonReduction]: Total number of compositions: 407 [2023-09-01 00:51:44,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:51:44,055 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;@3a159c7d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:51:44,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:51:44,073 INFO L130 PetriNetUnfolder]: 88/352 cut-off events. [2023-09-01 00:51:44,073 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 00:51:44,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:44,073 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:44,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:44,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:44,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1445532467, now seen corresponding path program 1 times [2023-09-01 00:51:44,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:44,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879561470] [2023-09-01 00:51:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:44,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:44,101 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 00:51:44,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:44,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879561470] [2023-09-01 00:51:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879561470] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:51:44,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:51:44,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:51:44,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667107211] [2023-09-01 00:51:44,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:51:44,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:51:44,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:44,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:51:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:51:44,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 378 out of 865 [2023-09-01 00:51:44,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 216 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 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 00:51:44,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:44,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 378 of 865 [2023-09-01 00:51:44,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand