./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_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_75-tricky_address2_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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:50:47,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:50:47,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:50:47,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:50:47,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:50:47,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:50:47,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:50:47,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:50:47,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:50:47,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:50:47,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:50:47,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:50:47,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:50:47,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:50:47,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:50:47,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:50:47,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:50:47,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:50:47,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:50:47,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:50:47,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:50:47,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:50:47,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:50:47,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:50:47,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:50:47,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:50:47,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:50:47,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:50:47,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:50:47,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:50:47,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:50:47,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:50:47,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:50:47,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:50:47,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:50:47,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:50:47,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:50:47,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:50:47,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:50:47,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:50:47,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:50:47,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:50:47,597 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:50:47,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:50:47,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:50:47,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:50:47,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:50:47,601 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:50:47,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:50:47,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:50:47,602 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:50:47,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:50:47,616 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:50:47,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:50:47,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:50:47,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:50:47,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:50:47,617 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:50:47,618 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:50:47,618 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:50:47,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:50:47,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:50:47,618 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:50:47,618 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:50:47,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:50:47,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:50:47,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:50:47,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:50:47,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:50:47,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:50:47,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:50:47,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:50:47,620 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:50:47,620 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:50:47,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:50:47,620 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:50:47,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:50:47,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:50:47,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:50:47,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:50:47,838 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:50:47,838 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:50:47,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-09-01 00:50:48,816 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:50:49,030 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:50:49,030 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-09-01 00:50:49,063 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e7a4797/e68ea0fdfc5644f8aef4c7cc5a876f57/FLAG998c6ca09 [2023-09-01 00:50:49,074 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e7a4797/e68ea0fdfc5644f8aef4c7cc5a876f57 [2023-09-01 00:50:49,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:50:49,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:50:49,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:50:49,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:50:49,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:50:49,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a22138a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49, skipping insertion in model container [2023-09-01 00:50:49,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:50:49,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:50:49,485 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_75-tricky_address2_racefree.i[41323,41336] [2023-09-01 00:50:49,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:50:49,526 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:50:49,544 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_75-tricky_address2_racefree.i[41323,41336] [2023-09-01 00:50:49,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:50:49,595 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:50:49,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49 WrapperNode [2023-09-01 00:50:49,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:50:49,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:50:49,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:50:49,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:50:49,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,649 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 190 [2023-09-01 00:50:49,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:50:49,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:50:49,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:50:49,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:50:49,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,668 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:50:49,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:50:49,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:50:49,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:50:49,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (1/1) ... [2023-09-01 00:50:49,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:50:49,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:50:49,692 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 00:50:49,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:50:49,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:50:49,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:50:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:50:49,702 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 00:50:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:50:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:50:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:50:49,722 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:50:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:50:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:50:49,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:50:49,723 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 00:50:49,837 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:50:49,839 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:50:50,126 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:50:50,133 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:50:50,133 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 00:50:50,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:50:50 BoogieIcfgContainer [2023-09-01 00:50:50,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:50:50,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:50:50,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:50:50,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:50:50,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:50:49" (1/3) ... [2023-09-01 00:50:50,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b8e1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:50:50, skipping insertion in model container [2023-09-01 00:50:50,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:50:49" (2/3) ... [2023-09-01 00:50:50,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b8e1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:50:50, skipping insertion in model container [2023-09-01 00:50:50,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:50:50" (3/3) ... [2023-09-01 00:50:50,141 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-09-01 00:50:50,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:50:50,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-09-01 00:50:50,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:50:50,224 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:50:50,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 218 transitions, 444 flow [2023-09-01 00:50:50,321 INFO L130 PetriNetUnfolder]: 45/305 cut-off events. [2023-09-01 00:50:50,322 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 00:50:50,327 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 00:50:50,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 218 transitions, 444 flow [2023-09-01 00:50:50,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 213 transitions, 431 flow [2023-09-01 00:50:50,335 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:50:50,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 213 transitions, 431 flow [2023-09-01 00:50:50,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 213 transitions, 431 flow [2023-09-01 00:50:50,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 431 flow [2023-09-01 00:50:50,379 INFO L130 PetriNetUnfolder]: 44/300 cut-off events. [2023-09-01 00:50:50,379 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:50:50,380 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 00:50:50,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 14508 [2023-09-01 00:50:53,507 INFO L134 LiptonReduction]: Checked pairs total: 29120 [2023-09-01 00:50:53,508 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-09-01 00:50:53,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:50:53,535 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;@14e83191, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:50:53,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:50:53,543 INFO L130 PetriNetUnfolder]: 8/45 cut-off events. [2023-09-01 00:50:53,543 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:50:53,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:53,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 00:50:53,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:53,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1883039473, now seen corresponding path program 1 times [2023-09-01 00:50:53,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:53,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841184208] [2023-09-01 00:50:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:53,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:53,789 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 00:50:53,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:50:53,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841184208] [2023-09-01 00:50:53,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841184208] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:50:53,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:50:53,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:50:53,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97401353] [2023-09-01 00:50:53,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:50:53,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:50:53,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:50:53,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:50:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:50:53,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 416 [2023-09-01 00:50:53,834 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 00:50:53,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:50:53,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 416 [2023-09-01 00:50:53,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:50:54,015 INFO L130 PetriNetUnfolder]: 620/1405 cut-off events. [2023-09-01 00:50:54,015 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:50:54,017 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 00:50:54,019 INFO L137 encePairwiseOnDemand]: 386/416 looper letters, 27 selfloop transitions, 2 changer transitions 28/65 dead transitions. [2023-09-01 00:50:54,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 243 flow [2023-09-01 00:50:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:50:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:50:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-09-01 00:50:54,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056089743589743 [2023-09-01 00:50:54,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-09-01 00:50:54,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-09-01 00:50:54,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:50:54,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-09-01 00:50:54,037 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 00:50:54,041 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 00:50:54,042 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 00:50:54,044 INFO L175 Difference]: Start difference. First operand has 70 places, 91 transitions, 187 flow. Second operand 3 states and 631 transitions. [2023-09-01 00:50:54,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 243 flow [2023-09-01 00:50:54,046 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 00:50:54,047 INFO L231 Difference]: Finished difference. Result has 67 places, 37 transitions, 89 flow [2023-09-01 00:50:54,049 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 00:50:54,051 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -3 predicate places. [2023-09-01 00:50:54,052 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 37 transitions, 89 flow [2023-09-01 00:50:54,052 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 00:50:54,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:54,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:50:54,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:50:54,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:54,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:54,053 INFO L85 PathProgramCache]: Analyzing trace with hash -860209746, now seen corresponding path program 1 times [2023-09-01 00:50:54,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:54,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035794853] [2023-09-01 00:50:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:54,104 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 00:50:54,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:50:54,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035794853] [2023-09-01 00:50:54,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035794853] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:50:54,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022508987] [2023-09-01 00:50:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:54,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:50:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:50:54,108 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 00:50:54,157 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 00:50:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:54,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:50:54,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:50:54,292 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 00:50:54,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:50:54,303 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 00:50:54,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022508987] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:50:54,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:50:54,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:50:54,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426587608] [2023-09-01 00:50:54,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:50:54,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:50:54,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:50:54,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:50:54,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:50:54,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 416 [2023-09-01 00:50:54,320 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 00:50:54,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:50:54,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 416 [2023-09-01 00:50:54,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:50:54,378 INFO L130 PetriNetUnfolder]: 102/270 cut-off events. [2023-09-01 00:50:54,378 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:50:54,378 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 00:50:54,379 INFO L137 encePairwiseOnDemand]: 413/416 looper letters, 27 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-09-01 00:50:54,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 165 flow [2023-09-01 00:50:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:50:54,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:50:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1127 transitions. [2023-09-01 00:50:54,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4515224358974359 [2023-09-01 00:50:54,383 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1127 transitions. [2023-09-01 00:50:54,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1127 transitions. [2023-09-01 00:50:54,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:50:54,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1127 transitions. [2023-09-01 00:50:54,386 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 00:50:54,389 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 00:50:54,390 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 00:50:54,390 INFO L175 Difference]: Start difference. First operand has 67 places, 37 transitions, 89 flow. Second operand 6 states and 1127 transitions. [2023-09-01 00:50:54,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 165 flow [2023-09-01 00:50:54,391 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 00:50:54,392 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 121 flow [2023-09-01 00:50:54,392 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 00:50:54,393 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -23 predicate places. [2023-09-01 00:50:54,393 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 121 flow [2023-09-01 00:50:54,394 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 00:50:54,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:54,394 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 00:50:54,401 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 00:50:54,599 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 00:50:54,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:54,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1346055729, now seen corresponding path program 2 times [2023-09-01 00:50:54,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:54,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213286056] [2023-09-01 00:50:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:54,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:54,706 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 00:50:54,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:50:54,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213286056] [2023-09-01 00:50:54,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213286056] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:50:54,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087199800] [2023-09-01 00:50:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:50:54,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:50:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:50:54,710 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 00:50:54,712 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 00:50:54,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:50:54,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:50:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:50:54,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:50:54,789 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 00:50:54,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:50:54,834 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 00:50:54,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087199800] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:50:54,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:50:54,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:50:54,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725567646] [2023-09-01 00:50:54,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:50:54,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:50:54,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:50:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:50:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:50:54,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 416 [2023-09-01 00:50:54,860 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 00:50:54,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:50:54,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 416 [2023-09-01 00:50:54,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:50:54,941 INFO L130 PetriNetUnfolder]: 102/276 cut-off events. [2023-09-01 00:50:54,941 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 00:50:54,941 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 00:50:54,942 INFO L137 encePairwiseOnDemand]: 413/416 looper letters, 27 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2023-09-01 00:50:54,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 233 flow [2023-09-01 00:50:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:50:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:50:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2228 transitions. [2023-09-01 00:50:54,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463141025641026 [2023-09-01 00:50:54,946 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2228 transitions. [2023-09-01 00:50:54,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2228 transitions. [2023-09-01 00:50:54,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:50:54,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2228 transitions. [2023-09-01 00:50:54,950 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 00:50:54,955 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 00:50:54,957 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 00:50:54,957 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 121 flow. Second operand 12 states and 2228 transitions. [2023-09-01 00:50:54,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 233 flow [2023-09-01 00:50:54,958 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 00:50:54,959 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 191 flow [2023-09-01 00:50:54,959 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 00:50:54,959 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -7 predicate places. [2023-09-01 00:50:54,959 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 191 flow [2023-09-01 00:50:54,960 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 00:50:54,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:54,960 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 00:50:54,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 00:50:55,167 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 00:50:55,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:55,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1458375953, now seen corresponding path program 3 times [2023-09-01 00:50:55,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:55,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382129240] [2023-09-01 00:50:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:55,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:50:55,208 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:50:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:50:55,249 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:50:55,249 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:50:55,252 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:50:55,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:50:55,254 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:50:55,255 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:50:55,255 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:50:55,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:50:55,292 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:50:55,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 298 transitions, 614 flow [2023-09-01 00:50:55,354 INFO L130 PetriNetUnfolder]: 75/501 cut-off events. [2023-09-01 00:50:55,354 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 00:50:55,356 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 00:50:55,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 298 transitions, 614 flow [2023-09-01 00:50:55,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 298 transitions, 614 flow [2023-09-01 00:50:55,360 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:50:55,360 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 298 transitions, 614 flow [2023-09-01 00:50:55,360 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 298 transitions, 614 flow [2023-09-01 00:50:55,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 298 transitions, 614 flow [2023-09-01 00:50:55,400 INFO L130 PetriNetUnfolder]: 75/501 cut-off events. [2023-09-01 00:50:55,400 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 00:50:55,402 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 00:50:55,416 INFO L119 LiptonReduction]: Number of co-enabled transitions 42900 [2023-09-01 00:50:58,873 INFO L134 LiptonReduction]: Checked pairs total: 90194 [2023-09-01 00:50:58,874 INFO L136 LiptonReduction]: Total number of compositions: 270 [2023-09-01 00:50:58,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:50:58,880 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;@14e83191, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:50:58,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:50:58,888 INFO L130 PetriNetUnfolder]: 38/158 cut-off events. [2023-09-01 00:50:58,890 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:50:58,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:58,890 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:50:58,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:58,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1842105687, now seen corresponding path program 1 times [2023-09-01 00:50:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:58,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725347746] [2023-09-01 00:50:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:58,924 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 00:50:58,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:50:58,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725347746] [2023-09-01 00:50:58,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725347746] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:50:58,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:50:58,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:50:58,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679358423] [2023-09-01 00:50:58,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:50:58,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:50:58,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:50:58,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:50:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:50:58,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 568 [2023-09-01 00:50:58,934 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 00:50:58,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:50:58,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 568 [2023-09-01 00:50:58,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:01,782 INFO L130 PetriNetUnfolder]: 28221/45403 cut-off events. [2023-09-01 00:51:01,782 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-09-01 00:51:01,816 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 00:51:01,853 INFO L137 encePairwiseOnDemand]: 526/568 looper letters, 50 selfloop transitions, 2 changer transitions 32/97 dead transitions. [2023-09-01 00:51:01,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 370 flow [2023-09-01 00:51:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:51:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:51:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2023-09-01 00:51:01,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064553990610329 [2023-09-01 00:51:01,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2023-09-01 00:51:01,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2023-09-01 00:51:01,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:01,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2023-09-01 00:51:01,861 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 00:51:01,863 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 00:51:01,864 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 00:51:01,864 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 863 transitions. [2023-09-01 00:51:01,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 370 flow [2023-09-01 00:51:01,884 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 00:51:01,885 INFO L231 Difference]: Finished difference. Result has 98 places, 65 transitions, 152 flow [2023-09-01 00:51:01,885 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 00:51:01,886 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-09-01 00:51:01,886 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 65 transitions, 152 flow [2023-09-01 00:51:01,886 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 00:51:01,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:01,886 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:01,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:51:01,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:01,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:01,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2053159031, now seen corresponding path program 1 times [2023-09-01 00:51:01,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:01,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874775451] [2023-09-01 00:51:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:01,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:01,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:01,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874775451] [2023-09-01 00:51:01,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874775451] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:01,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204030755] [2023-09-01 00:51:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:01,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:01,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:01,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:51:01,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 00:51:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:02,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:51:02,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:02,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:02,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204030755] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:02,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:02,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:51:02,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113736423] [2023-09-01 00:51:02,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:02,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:51:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:51:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:51:02,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 568 [2023-09-01 00:51:02,038 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 00:51:02,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:02,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 568 [2023-09-01 00:51:02,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:02,578 INFO L130 PetriNetUnfolder]: 5186/8629 cut-off events. [2023-09-01 00:51:02,578 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-09-01 00:51:02,585 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 00:51:02,602 INFO L137 encePairwiseOnDemand]: 565/568 looper letters, 50 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-09-01 00:51:02,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 274 flow [2023-09-01 00:51:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:51:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:51:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1540 transitions. [2023-09-01 00:51:02,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518779342723005 [2023-09-01 00:51:02,609 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1540 transitions. [2023-09-01 00:51:02,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1540 transitions. [2023-09-01 00:51:02,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:02,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1540 transitions. [2023-09-01 00:51:02,613 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 00:51:02,618 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 00:51:02,619 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 00:51:02,619 INFO L175 Difference]: Start difference. First operand has 98 places, 65 transitions, 152 flow. Second operand 6 states and 1540 transitions. [2023-09-01 00:51:02,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 274 flow [2023-09-01 00:51:02,620 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 00:51:02,621 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 182 flow [2023-09-01 00:51:02,621 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 00:51:02,624 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -27 predicate places. [2023-09-01 00:51:02,624 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 182 flow [2023-09-01 00:51:02,625 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 00:51:02,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:02,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:02,634 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 00:51:02,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:02,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:02,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:02,830 INFO L85 PathProgramCache]: Analyzing trace with hash -622728535, now seen corresponding path program 2 times [2023-09-01 00:51:02,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:02,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70501294] [2023-09-01 00:51:02,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:02,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:02,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:02,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70501294] [2023-09-01 00:51:02,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70501294] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:51:02,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043988767] [2023-09-01 00:51:02,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:51:02,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:02,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:51:02,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:51:02,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 00:51:02,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:51:02,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:51:02,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:51:02,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:51:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:03,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:51:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:51:03,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043988767] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:51:03,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:51:03,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:51:03,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566861709] [2023-09-01 00:51:03,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:51:03,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:51:03,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:03,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:51:03,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:51:03,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 568 [2023-09-01 00:51:03,071 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 00:51:03,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:03,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 568 [2023-09-01 00:51:03,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:51:03,576 INFO L130 PetriNetUnfolder]: 5186/8635 cut-off events. [2023-09-01 00:51:03,577 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-09-01 00:51:03,584 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 00:51:03,598 INFO L137 encePairwiseOnDemand]: 565/568 looper letters, 50 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-09-01 00:51:03,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 340 flow [2023-09-01 00:51:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:51:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:51:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3031 transitions. [2023-09-01 00:51:03,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44468896713615025 [2023-09-01 00:51:03,604 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3031 transitions. [2023-09-01 00:51:03,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3031 transitions. [2023-09-01 00:51:03,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:51:03,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3031 transitions. [2023-09-01 00:51:03,610 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 00:51:03,616 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 00:51:03,617 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 00:51:03,618 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 182 flow. Second operand 12 states and 3031 transitions. [2023-09-01 00:51:03,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 340 flow [2023-09-01 00:51:03,618 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 00:51:03,619 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 252 flow [2023-09-01 00:51:03,619 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 00:51:03,620 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2023-09-01 00:51:03,620 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 252 flow [2023-09-01 00:51:03,621 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 00:51:03,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:03,621 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:51:03,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 00:51:03,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:51:03,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:03,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1060454743, now seen corresponding path program 3 times [2023-09-01 00:51:03,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:03,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712077985] [2023-09-01 00:51:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:03,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:03,841 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:51:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:51:03,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:51:03,863 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:51:03,863 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:51:03,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:51:03,863 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:51:03,864 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:51:03,864 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:51:03,864 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:51:03,893 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:51:03,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 378 transitions, 786 flow [2023-09-01 00:51:03,979 INFO L130 PetriNetUnfolder]: 110/738 cut-off events. [2023-09-01 00:51:03,979 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 00:51:03,984 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 00:51:03,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 378 transitions, 786 flow [2023-09-01 00:51:03,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 378 transitions, 786 flow [2023-09-01 00:51:03,990 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:51:03,990 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 378 transitions, 786 flow [2023-09-01 00:51:03,990 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 378 transitions, 786 flow [2023-09-01 00:51:03,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 378 transitions, 786 flow [2023-09-01 00:51:04,070 INFO L130 PetriNetUnfolder]: 110/738 cut-off events. [2023-09-01 00:51:04,070 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 00:51:04,074 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 00:51:04,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 83304 [2023-09-01 00:51:08,353 INFO L134 LiptonReduction]: Checked pairs total: 180304 [2023-09-01 00:51:08,354 INFO L136 LiptonReduction]: Total number of compositions: 336 [2023-09-01 00:51:08,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:51:08,356 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;@14e83191, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:51:08,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:51:08,371 INFO L130 PetriNetUnfolder]: 65/254 cut-off events. [2023-09-01 00:51:08,371 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:51:08,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:51:08,372 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:51:08,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:51:08,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:51:08,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1165658396, now seen corresponding path program 1 times [2023-09-01 00:51:08,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:51:08,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704262532] [2023-09-01 00:51:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:51:08,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:51:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:51:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:51:08,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:51:08,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704262532] [2023-09-01 00:51:08,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704262532] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:51:08,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:51:08,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:51:08,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450617251] [2023-09-01 00:51:08,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:51:08,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:51:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:51:08,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:51:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:51:08,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 714 [2023-09-01 00:51:08,423 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 00:51:08,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:51:08,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 714 [2023-09-01 00:51:08,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:52:17,272 INFO L130 PetriNetUnfolder]: 777850/1123233 cut-off events. [2023-09-01 00:52:17,272 INFO L131 PetriNetUnfolder]: For 5761/5761 co-relation queries the response was YES. [2023-09-01 00:52:19,079 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 00:52:19,989 INFO L137 encePairwiseOnDemand]: 659/714 looper letters, 68 selfloop transitions, 2 changer transitions 33/125 dead transitions. [2023-09-01 00:52:19,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 125 transitions, 476 flow [2023-09-01 00:52:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:52:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:52:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1090 transitions. [2023-09-01 00:52:19,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088702147525677 [2023-09-01 00:52:19,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1090 transitions. [2023-09-01 00:52:19,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1090 transitions. [2023-09-01 00:52:19,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:52:19,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1090 transitions. [2023-09-01 00:52:19,995 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 00:52:19,997 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 00:52:19,997 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 00:52:19,997 INFO L175 Difference]: Start difference. First operand has 133 places, 176 transitions, 382 flow. Second operand 3 states and 1090 transitions. [2023-09-01 00:52:19,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 125 transitions, 476 flow [2023-09-01 00:52:20,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 125 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:52:20,001 INFO L231 Difference]: Finished difference. Result has 126 places, 92 transitions, 215 flow [2023-09-01 00:52:20,001 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 00:52:20,002 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -7 predicate places. [2023-09-01 00:52:20,002 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 92 transitions, 215 flow [2023-09-01 00:52:20,002 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 00:52:20,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:52:20,003 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:52:20,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:52:20,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:52:20,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:52:20,003 INFO L85 PathProgramCache]: Analyzing trace with hash 623555628, now seen corresponding path program 1 times [2023-09-01 00:52:20,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:52:20,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771633793] [2023-09-01 00:52:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:52:20,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:52:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:52:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:52:20,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:52:20,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771633793] [2023-09-01 00:52:20,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771633793] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:52:20,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159363494] [2023-09-01 00:52:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:52:20,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:52:20,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:52:20,073 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:52:20,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 00:52:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:52:20,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:52:20,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:52:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:52:20,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:52:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:52:20,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159363494] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:52:20,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:52:20,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:52:20,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033661962] [2023-09-01 00:52:20,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:52:20,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:52:20,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:52:20,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:52:20,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:52:20,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 714 [2023-09-01 00:52:20,190 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 00:52:20,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:52:20,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 714 [2023-09-01 00:52:20,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:52:31,931 INFO L130 PetriNetUnfolder]: 146240/213986 cut-off events. [2023-09-01 00:52:31,932 INFO L131 PetriNetUnfolder]: For 3082/3082 co-relation queries the response was YES. [2023-09-01 00:52:32,275 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 00:52:32,835 INFO L137 encePairwiseOnDemand]: 711/714 looper letters, 68 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-09-01 00:52:32,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 95 transitions, 373 flow [2023-09-01 00:52:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:52:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:52:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1948 transitions. [2023-09-01 00:52:32,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45471521942110177 [2023-09-01 00:52:32,839 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1948 transitions. [2023-09-01 00:52:32,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1948 transitions. [2023-09-01 00:52:32,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:52:32,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1948 transitions. [2023-09-01 00:52:32,843 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 00:52:32,847 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 00:52:32,848 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 00:52:32,848 INFO L175 Difference]: Start difference. First operand has 126 places, 92 transitions, 215 flow. Second operand 6 states and 1948 transitions. [2023-09-01 00:52:32,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 95 transitions, 373 flow [2023-09-01 00:52:32,850 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 00:52:32,851 INFO L231 Difference]: Finished difference. Result has 104 places, 95 transitions, 241 flow [2023-09-01 00:52:32,852 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 00:52:32,853 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -29 predicate places. [2023-09-01 00:52:32,853 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 95 transitions, 241 flow [2023-09-01 00:52:32,853 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 00:52:32,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:52:32,854 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:52:32,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 00:52:33,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 00:52:33,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:52:33,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:52:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash -978006756, now seen corresponding path program 2 times [2023-09-01 00:52:33,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:52:33,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342809115] [2023-09-01 00:52:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:52:33,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:52:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:52:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:52:33,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:52:33,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342809115] [2023-09-01 00:52:33,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342809115] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:52:33,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611118501] [2023-09-01 00:52:33,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:52:33,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:52:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:52:33,126 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:52:33,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 00:52:33,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:52:33,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:52:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:52:33,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:52:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:52:33,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:52:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:52:33,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611118501] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:52:33,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:52:33,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:52:33,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840772821] [2023-09-01 00:52:33,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:52:33,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:52:33,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:52:33,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:52:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:52:33,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 714 [2023-09-01 00:52:33,294 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 00:52:33,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:52:33,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 714 [2023-09-01 00:52:33,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:52:45,890 INFO L130 PetriNetUnfolder]: 146240/213992 cut-off events. [2023-09-01 00:52:45,890 INFO L131 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2023-09-01 00:52:46,278 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 00:52:46,601 INFO L137 encePairwiseOnDemand]: 711/714 looper letters, 68 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-09-01 00:52:46,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 101 transitions, 435 flow [2023-09-01 00:52:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:52:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:52:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3829 transitions. [2023-09-01 00:52:46,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44689542483660133 [2023-09-01 00:52:46,607 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3829 transitions. [2023-09-01 00:52:46,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3829 transitions. [2023-09-01 00:52:46,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:52:46,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3829 transitions. [2023-09-01 00:52:46,613 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 00:52:46,619 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 00:52:46,620 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 00:52:46,620 INFO L175 Difference]: Start difference. First operand has 104 places, 95 transitions, 241 flow. Second operand 12 states and 3829 transitions. [2023-09-01 00:52:46,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 101 transitions, 435 flow [2023-09-01 00:52:46,621 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 00:52:46,622 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 311 flow [2023-09-01 00:52:46,622 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 00:52:46,623 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -13 predicate places. [2023-09-01 00:52:46,623 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 311 flow [2023-09-01 00:52:46,623 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 00:52:46,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:52:46,624 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:52:46,637 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 00:52:46,827 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 00:52:46,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:52:46,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:52:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1431276772, now seen corresponding path program 3 times [2023-09-01 00:52:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:52:46,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973131032] [2023-09-01 00:52:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:52:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:52:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:52:46,846 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:52:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:52:46,873 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:52:46,874 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:52:46,874 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:52:46,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:52:46,874 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:52:46,874 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:52:46,874 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:52:46,875 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 00:52:46,910 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:52:46,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 458 transitions, 960 flow [2023-09-01 00:52:47,185 INFO L130 PetriNetUnfolder]: 157/1059 cut-off events. [2023-09-01 00:52:47,186 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 00:52:47,195 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 00:52:47,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 394 places, 458 transitions, 960 flow [2023-09-01 00:52:47,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 458 transitions, 960 flow [2023-09-01 00:52:47,201 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:52:47,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 394 places, 458 transitions, 960 flow [2023-09-01 00:52:47,201 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 394 places, 458 transitions, 960 flow [2023-09-01 00:52:47,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 458 transitions, 960 flow [2023-09-01 00:52:47,307 INFO L130 PetriNetUnfolder]: 157/1059 cut-off events. [2023-09-01 00:52:47,307 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 00:52:47,318 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 00:52:47,358 INFO L119 LiptonReduction]: Number of co-enabled transitions 136344 [2023-09-01 00:52:51,514 INFO L134 LiptonReduction]: Checked pairs total: 306318 [2023-09-01 00:52:51,514 INFO L136 LiptonReduction]: Total number of compositions: 407 [2023-09-01 00:52:51,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:52:51,516 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;@14e83191, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:52:51,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:52:51,533 INFO L130 PetriNetUnfolder]: 88/352 cut-off events. [2023-09-01 00:52:51,533 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 00:52:51,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:52:51,534 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:52:51,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:52:51,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:52:51,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1445532467, now seen corresponding path program 1 times [2023-09-01 00:52:51,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:52:51,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437775798] [2023-09-01 00:52:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:52:51,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:52:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:52:51,565 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 00:52:51,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:52:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437775798] [2023-09-01 00:52:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437775798] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:52:51,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:52:51,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:52:51,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623688750] [2023-09-01 00:52:51,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:52:51,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:52:51,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:52:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:52:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:52:51,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 378 out of 865 [2023-09-01 00:52:51,574 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 00:52:51,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:52:51,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 378 of 865 [2023-09-01 00:52:51,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand