./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:52:17,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:52:17,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:52:17,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:52:17,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:52:17,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:52:17,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:52:17,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:52:17,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:52:17,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:52:17,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:52:17,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:52:17,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:52:17,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:52:17,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:52:17,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:52:17,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:52:17,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:52:17,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:52:17,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:52:17,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:52:17,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:52:17,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:52:17,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:52:17,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:52:17,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:52:17,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:52:17,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:52:17,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:52:17,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:52:17,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:52:17,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:52:17,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:52:17,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:52:17,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:52:17,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:52:17,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:52:17,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:52:17,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:52:17,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:52:17,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:52:17,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:52:17,656 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:52:17,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:52:17,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:52:17,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:52:17,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:52:17,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:52:17,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:52:17,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:52:17,659 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:52:17,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:52:17,660 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:52:17,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:52:17,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:52:17,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:52:17,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:52:17,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:52:17,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:52:17,661 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:52:17,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:52:17,662 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:52:17,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:52:17,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:52:17,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:52:17,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:52:17,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:52:17,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:52:17,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:52:17,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:52:17,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:52:17,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:52:17,664 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:52:17,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:52:17,664 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:52:17,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:52:17,665 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:52:17,665 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:52:17,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:52:17,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:52:17,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:52:17,996 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:52:17,997 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:52:17,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-30 22:52:19,189 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:52:19,400 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:52:19,400 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-30 22:52:19,416 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/242f44f64/56168532e4154127a9086019edf48150/FLAGd908679fb [2023-08-30 22:52:19,430 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/242f44f64/56168532e4154127a9086019edf48150 [2023-08-30 22:52:19,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:52:19,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:52:19,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:52:19,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:52:19,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:52:19,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65812f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19, skipping insertion in model container [2023-08-30 22:52:19,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:52:19,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:52:19,644 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 22:52:19,769 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-08-30 22:52:19,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:52:19,791 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:52:19,812 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 22:52:19,830 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-08-30 22:52:19,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:52:19,868 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 22:52:19,868 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 22:52:19,868 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 22:52:19,874 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:52:19,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19 WrapperNode [2023-08-30 22:52:19,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:52:19,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:52:19,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:52:19,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:52:19,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,918 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2023-08-30 22:52:19,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:52:19,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:52:19,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:52:19,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:52:19,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,953 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:52:19,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:52:19,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:52:19,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:52:19,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (1/1) ... [2023-08-30 22:52:19,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:52:19,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:52:19,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 22:52:20,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 22:52:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 22:52:20,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 22:52:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:52:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 22:52:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:52:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:52:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:52:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:52:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 22:52:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:52:20,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:52:20,062 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:52:20,160 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:52:20,162 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:52:20,271 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:52:20,335 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:52:20,348 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 22:52:20,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:52:20 BoogieIcfgContainer [2023-08-30 22:52:20,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:52:20,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:52:20,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:52:20,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:52:20,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:52:19" (1/3) ... [2023-08-30 22:52:20,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2912de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:52:20, skipping insertion in model container [2023-08-30 22:52:20,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:19" (2/3) ... [2023-08-30 22:52:20,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2912de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:52:20, skipping insertion in model container [2023-08-30 22:52:20,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:52:20" (3/3) ... [2023-08-30 22:52:20,375 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-08-30 22:52:20,382 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:52:20,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:52:20,406 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:52:20,406 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:52:20,471 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:52:20,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-30 22:52:20,563 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2023-08-30 22:52:20,563 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:52:20,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-30 22:52:20,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 85 flow [2023-08-30 22:52:20,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 85 flow [2023-08-30 22:52:20,576 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:52:20,594 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-30 22:52:20,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-30 22:52:20,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-30 22:52:20,606 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2023-08-30 22:52:20,609 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:52:20,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-30 22:52:20,611 INFO L119 LiptonReduction]: Number of co-enabled transitions 364 [2023-08-30 22:52:22,287 INFO L134 LiptonReduction]: Checked pairs total: 330 [2023-08-30 22:52:22,287 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-30 22:52:22,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:52:22,303 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2631dcb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:52:22,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 22:52:22,305 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 22:52:22,305 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:52:22,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:22,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:52:22,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 22:52:22,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:22,310 INFO L85 PathProgramCache]: Analyzing trace with hash 7473566, now seen corresponding path program 1 times [2023-08-30 22:52:22,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:22,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984539683] [2023-08-30 22:52:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:52:22,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:22,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984539683] [2023-08-30 22:52:22,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984539683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:22,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:22,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:52:22,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928977155] [2023-08-30 22:52:22,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:22,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:52:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:52:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:52:22,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 78 [2023-08-30 22:52:22,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:22,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:22,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 78 [2023-08-30 22:52:22,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:22,501 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 22:52:22,501 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:52:22,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-30 22:52:22,502 INFO L137 encePairwiseOnDemand]: 76/78 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-30 22:52:22,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-30 22:52:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:52:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:52:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2023-08-30 22:52:22,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2023-08-30 22:52:22,512 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 71 transitions. [2023-08-30 22:52:22,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 71 transitions. [2023-08-30 22:52:22,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:22,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 71 transitions. [2023-08-30 22:52:22,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 35.5) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:22,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:22,520 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:22,522 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 71 transitions. [2023-08-30 22:52:22,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-30 22:52:22,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:52:22,525 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-30 22:52:22,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-30 22:52:22,530 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-30 22:52:22,530 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-30 22:52:22,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:22,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:22,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 22:52:22,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:52:22,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 22:52:22,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1407855100, now seen corresponding path program 1 times [2023-08-30 22:52:22,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:22,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875088591] [2023-08-30 22:52:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:22,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:22,552 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:52:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:22,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:52:22,623 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:52:22,625 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 22:52:22,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 22:52:22,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 22:52:22,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:52:22,636 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:52:22,639 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:52:22,640 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 22:52:22,667 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:52:22,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-30 22:52:22,687 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2023-08-30 22:52:22,688 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:52:22,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 22:52:22,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2023-08-30 22:52:22,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2023-08-30 22:52:22,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:52:22,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-30 22:52:22,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-30 22:52:22,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-30 22:52:22,702 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2023-08-30 22:52:22,702 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:52:22,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 22:52:22,704 INFO L119 LiptonReduction]: Number of co-enabled transitions 1148 [2023-08-30 22:52:23,623 INFO L134 LiptonReduction]: Checked pairs total: 3716 [2023-08-30 22:52:23,624 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-30 22:52:23,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:52:23,626 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2631dcb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:52:23,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 22:52:23,631 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-08-30 22:52:23,631 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:52:23,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:23,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:23,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 22:52:23,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 626667327, now seen corresponding path program 1 times [2023-08-30 22:52:23,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:23,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414780732] [2023-08-30 22:52:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:52:23,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414780732] [2023-08-30 22:52:23,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414780732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:23,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:23,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:23,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780832252] [2023-08-30 22:52:23,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:23,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:23,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:23,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:23,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:23,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2023-08-30 22:52:23,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:23,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:23,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2023-08-30 22:52:23,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:24,074 INFO L130 PetriNetUnfolder]: 200/387 cut-off events. [2023-08-30 22:52:24,074 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 22:52:24,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 387 events. 200/387 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1940 event pairs, 51 based on Foata normal form. 12/350 useless extension candidates. Maximal degree in co-relation 704. Up to 128 conditions per place. [2023-08-30 22:52:24,078 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 35 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2023-08-30 22:52:24,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 50 transitions, 210 flow [2023-08-30 22:52:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:52:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:52:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 257 transitions. [2023-08-30 22:52:24,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49233716475095785 [2023-08-30 22:52:24,082 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 257 transitions. [2023-08-30 22:52:24,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 257 transitions. [2023-08-30 22:52:24,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:24,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 257 transitions. [2023-08-30 22:52:24,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 42.833333333333336) internal successors, (257), 6 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:24,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:24,086 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:24,087 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 6 states and 257 transitions. [2023-08-30 22:52:24,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 50 transitions, 210 flow [2023-08-30 22:52:24,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 208 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 22:52:24,089 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 116 flow [2023-08-30 22:52:24,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-30 22:52:24,089 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-08-30 22:52:24,090 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 116 flow [2023-08-30 22:52:24,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:24,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:24,090 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 22:52:24,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:52:24,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 22:52:24,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1647591444, now seen corresponding path program 1 times [2023-08-30 22:52:24,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:24,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683048637] [2023-08-30 22:52:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:24,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:24,103 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:52:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:24,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:52:24,113 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:52:24,113 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 22:52:24,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 22:52:24,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 22:52:24,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 22:52:24,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:52:24,114 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:52:24,115 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:52:24,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 22:52:24,131 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:52:24,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 22:52:24,143 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2023-08-30 22:52:24,144 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:52:24,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-30 22:52:24,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 22:52:24,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2023-08-30 22:52:24,146 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:52:24,146 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-30 22:52:24,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-30 22:52:24,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 22:52:24,163 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2023-08-30 22:52:24,163 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:52:24,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-30 22:52:24,166 INFO L119 LiptonReduction]: Number of co-enabled transitions 2352 [2023-08-30 22:52:25,306 INFO L134 LiptonReduction]: Checked pairs total: 10314 [2023-08-30 22:52:25,306 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-30 22:52:25,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:52:25,309 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2631dcb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:52:25,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 22:52:25,311 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-08-30 22:52:25,312 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:52:25,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:25,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:25,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:52:25,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:25,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1282466881, now seen corresponding path program 1 times [2023-08-30 22:52:25,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:25,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750823368] [2023-08-30 22:52:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:25,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:52:25,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:25,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750823368] [2023-08-30 22:52:25,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750823368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:25,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:25,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:25,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205273815] [2023-08-30 22:52:25,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:25,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:25,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:25,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 108 [2023-08-30 22:52:25,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:25,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:25,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 108 [2023-08-30 22:52:25,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:26,009 INFO L130 PetriNetUnfolder]: 3340/4906 cut-off events. [2023-08-30 22:52:26,010 INFO L131 PetriNetUnfolder]: For 493/493 co-relation queries the response was YES. [2023-08-30 22:52:26,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10123 conditions, 4906 events. 3340/4906 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 28488 event pairs, 1049 based on Foata normal form. 44/4286 useless extension candidates. Maximal degree in co-relation 7840. Up to 2052 conditions per place. [2023-08-30 22:52:26,041 INFO L137 encePairwiseOnDemand]: 97/108 looper letters, 70 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-08-30 22:52:26,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 90 transitions, 403 flow [2023-08-30 22:52:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:52:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:52:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2023-08-30 22:52:26,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2023-08-30 22:52:26,046 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 339 transitions. [2023-08-30 22:52:26,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 339 transitions. [2023-08-30 22:52:26,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:26,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 339 transitions. [2023-08-30 22:52:26,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:26,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:26,050 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:26,050 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 93 flow. Second operand 6 states and 339 transitions. [2023-08-30 22:52:26,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 90 transitions, 403 flow [2023-08-30 22:52:26,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 90 transitions, 389 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-30 22:52:26,053 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 176 flow [2023-08-30 22:52:26,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-30 22:52:26,054 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-30 22:52:26,054 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 176 flow [2023-08-30 22:52:26,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:26,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:26,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:26,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:52:26,055 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:52:26,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1558574825, now seen corresponding path program 1 times [2023-08-30 22:52:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766656323] [2023-08-30 22:52:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:26,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:52:26,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:26,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766656323] [2023-08-30 22:52:26,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766656323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:26,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:26,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419195588] [2023-08-30 22:52:26,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:26,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:26,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:26,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 108 [2023-08-30 22:52:26,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:26,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:26,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 108 [2023-08-30 22:52:26,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:26,944 INFO L130 PetriNetUnfolder]: 5434/8184 cut-off events. [2023-08-30 22:52:26,945 INFO L131 PetriNetUnfolder]: For 3240/3292 co-relation queries the response was YES. [2023-08-30 22:52:26,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19123 conditions, 8184 events. 5434/8184 cut-off events. For 3240/3292 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 54704 event pairs, 1847 based on Foata normal form. 50/7370 useless extension candidates. Maximal degree in co-relation 17666. Up to 3679 conditions per place. [2023-08-30 22:52:27,009 INFO L137 encePairwiseOnDemand]: 101/108 looper letters, 75 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2023-08-30 22:52:27,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 103 transitions, 566 flow [2023-08-30 22:52:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:52:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:52:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 328 transitions. [2023-08-30 22:52:27,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2023-08-30 22:52:27,011 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 328 transitions. [2023-08-30 22:52:27,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 328 transitions. [2023-08-30 22:52:27,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:27,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 328 transitions. [2023-08-30 22:52:27,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:27,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:27,016 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:27,017 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 176 flow. Second operand 6 states and 328 transitions. [2023-08-30 22:52:27,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 103 transitions, 566 flow [2023-08-30 22:52:27,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 103 transitions, 566 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:52:27,027 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 306 flow [2023-08-30 22:52:27,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-30 22:52:27,030 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2023-08-30 22:52:27,031 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 306 flow [2023-08-30 22:52:27,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:27,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:27,032 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 22:52:27,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:52:27,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:52:27,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash -547612026, now seen corresponding path program 1 times [2023-08-30 22:52:27,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:27,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966679678] [2023-08-30 22:52:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:27,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:27,059 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:52:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:27,074 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:52:27,076 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:52:27,076 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 22:52:27,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 22:52:27,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 22:52:27,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 22:52:27,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 22:52:27,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:52:27,081 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 22:52:27,082 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:52:27,082 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 22:52:27,100 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:52:27,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-08-30 22:52:27,142 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2023-08-30 22:52:27,143 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:52:27,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-30 22:52:27,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 85 transitions, 202 flow [2023-08-30 22:52:27,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 202 flow [2023-08-30 22:52:27,145 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:52:27,145 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 85 transitions, 202 flow [2023-08-30 22:52:27,145 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 85 transitions, 202 flow [2023-08-30 22:52:27,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-08-30 22:52:27,156 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2023-08-30 22:52:27,156 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:52:27,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-30 22:52:27,160 INFO L119 LiptonReduction]: Number of co-enabled transitions 3976 [2023-08-30 22:52:28,470 INFO L134 LiptonReduction]: Checked pairs total: 15362 [2023-08-30 22:52:28,470 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-30 22:52:28,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:52:28,472 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2631dcb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:52:28,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:52:28,475 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-08-30 22:52:28,475 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:52:28,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:28,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:28,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:52:28,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1057443007, now seen corresponding path program 1 times [2023-08-30 22:52:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:28,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751056040] [2023-08-30 22:52:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:52:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751056040] [2023-08-30 22:52:28,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751056040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:28,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:28,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770616856] [2023-08-30 22:52:28,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:28,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:28,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:28,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:28,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 129 [2023-08-30 22:52:28,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 49.6) internal successors, (248), 5 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:28,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:28,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 129 [2023-08-30 22:52:28,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:31,805 INFO L130 PetriNetUnfolder]: 38126/50056 cut-off events. [2023-08-30 22:52:31,805 INFO L131 PetriNetUnfolder]: For 7293/7293 co-relation queries the response was YES. [2023-08-30 22:52:31,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103787 conditions, 50056 events. 38126/50056 cut-off events. For 7293/7293 co-relation queries the response was YES. Maximal size of possible extension queue 2574. Compared 300546 event pairs, 13503 based on Foata normal form. 132/43551 useless extension candidates. Maximal degree in co-relation 67090. Up to 22160 conditions per place. [2023-08-30 22:52:32,192 INFO L137 encePairwiseOnDemand]: 116/129 looper letters, 97 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2023-08-30 22:52:32,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 122 transitions, 574 flow [2023-08-30 22:52:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:52:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:52:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 413 transitions. [2023-08-30 22:52:32,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335917312661499 [2023-08-30 22:52:32,195 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 413 transitions. [2023-08-30 22:52:32,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 413 transitions. [2023-08-30 22:52:32,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:32,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 413 transitions. [2023-08-30 22:52:32,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:32,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:32,198 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:32,199 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 124 flow. Second operand 6 states and 413 transitions. [2023-08-30 22:52:32,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 122 transitions, 574 flow [2023-08-30 22:52:32,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 122 transitions, 538 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-08-30 22:52:32,207 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 228 flow [2023-08-30 22:52:32,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-30 22:52:32,209 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-08-30 22:52:32,209 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 228 flow [2023-08-30 22:52:32,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.6) internal successors, (248), 5 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:32,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:32,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:32,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 22:52:32,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:52:32,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:32,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1487924442, now seen corresponding path program 1 times [2023-08-30 22:52:32,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:32,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585959822] [2023-08-30 22:52:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:32,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:52:32,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:32,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585959822] [2023-08-30 22:52:32,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585959822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:32,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:32,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742743879] [2023-08-30 22:52:32,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:32,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:32,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:32,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 129 [2023-08-30 22:52:32,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:32,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:32,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 129 [2023-08-30 22:52:32,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:38,195 INFO L130 PetriNetUnfolder]: 72724/96946 cut-off events. [2023-08-30 22:52:38,195 INFO L131 PetriNetUnfolder]: For 44681/45129 co-relation queries the response was YES. [2023-08-30 22:52:38,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231613 conditions, 96946 events. 72724/96946 cut-off events. For 44681/45129 co-relation queries the response was YES. Maximal size of possible extension queue 5143. Compared 659923 event pairs, 26615 based on Foata normal form. 426/86754 useless extension candidates. Maximal degree in co-relation 215542. Up to 44665 conditions per place. [2023-08-30 22:52:38,955 INFO L137 encePairwiseOnDemand]: 121/129 looper letters, 108 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2023-08-30 22:52:38,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 144 transitions, 801 flow [2023-08-30 22:52:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:52:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:52:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 400 transitions. [2023-08-30 22:52:38,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167958656330749 [2023-08-30 22:52:38,958 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 400 transitions. [2023-08-30 22:52:38,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 400 transitions. [2023-08-30 22:52:38,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:38,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 400 transitions. [2023-08-30 22:52:38,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:38,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:38,961 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:38,961 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 228 flow. Second operand 6 states and 400 transitions. [2023-08-30 22:52:38,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 144 transitions, 801 flow [2023-08-30 22:52:39,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 144 transitions, 801 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:52:39,011 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 399 flow [2023-08-30 22:52:39,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-08-30 22:52:39,012 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-30 22:52:39,012 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 399 flow [2023-08-30 22:52:39,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:39,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:39,013 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:39,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 22:52:39,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:52:39,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:39,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1019157899, now seen corresponding path program 1 times [2023-08-30 22:52:39,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:39,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601805979] [2023-08-30 22:52:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:39,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 22:52:39,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:39,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601805979] [2023-08-30 22:52:39,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601805979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:39,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:39,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:39,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017677333] [2023-08-30 22:52:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:39,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:39,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:39,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 129 [2023-08-30 22:52:39,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:39,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:39,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 129 [2023-08-30 22:52:39,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:49,962 INFO L130 PetriNetUnfolder]: 123863/167541 cut-off events. [2023-08-30 22:52:49,962 INFO L131 PetriNetUnfolder]: For 130361/133401 co-relation queries the response was YES. [2023-08-30 22:52:50,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425195 conditions, 167541 events. 123863/167541 cut-off events. For 130361/133401 co-relation queries the response was YES. Maximal size of possible extension queue 9040. Compared 1262607 event pairs, 44995 based on Foata normal form. 2956/157399 useless extension candidates. Maximal degree in co-relation 397851. Up to 80186 conditions per place. [2023-08-30 22:52:51,075 INFO L137 encePairwiseOnDemand]: 121/129 looper letters, 121 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2023-08-30 22:52:51,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 170 transitions, 1171 flow [2023-08-30 22:52:51,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:52:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:52:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 397 transitions. [2023-08-30 22:52:51,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129198966408268 [2023-08-30 22:52:51,078 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 397 transitions. [2023-08-30 22:52:51,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 397 transitions. [2023-08-30 22:52:51,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:51,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 397 transitions. [2023-08-30 22:52:51,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.16666666666667) internal successors, (397), 6 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:51,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:51,081 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:51,081 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 399 flow. Second operand 6 states and 397 transitions. [2023-08-30 22:52:51,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 170 transitions, 1171 flow [2023-08-30 22:52:51,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 170 transitions, 1171 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:52:51,201 INFO L231 Difference]: Finished difference. Result has 73 places, 100 transitions, 701 flow [2023-08-30 22:52:51,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=701, PETRI_PLACES=73, PETRI_TRANSITIONS=100} [2023-08-30 22:52:51,201 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-08-30 22:52:51,202 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 100 transitions, 701 flow [2023-08-30 22:52:51,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:51,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:51,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:51,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 22:52:51,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:52:51,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash -432163817, now seen corresponding path program 1 times [2023-08-30 22:52:51,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:51,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735509204] [2023-08-30 22:52:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:51,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:52:51,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735509204] [2023-08-30 22:52:51,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735509204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:52:51,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470297720] [2023-08-30 22:52:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:51,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:52:51,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:52:51,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:52:51,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 22:52:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 22:52:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:52:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:52:51,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:52:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:52:51,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470297720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:52:51,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:52:51,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-30 22:52:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011639774] [2023-08-30 22:52:51,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:52:51,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 22:52:51,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 22:52:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 22:52:52,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-08-30 22:52:52,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 100 transitions, 701 flow. Second operand has 15 states, 15 states have (on average 43.266666666666666) internal successors, (649), 15 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:52:52,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:52,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-08-30 22:52:52,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:54:07,073 INFO L130 PetriNetUnfolder]: 712131/981316 cut-off events. [2023-08-30 22:54:07,073 INFO L131 PetriNetUnfolder]: For 1012776/1022900 co-relation queries the response was YES. [2023-08-30 22:54:11,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2627038 conditions, 981316 events. 712131/981316 cut-off events. For 1012776/1022900 co-relation queries the response was YES. Maximal size of possible extension queue 56091. Compared 9094744 event pairs, 59136 based on Foata normal form. 56024/997106 useless extension candidates. Maximal degree in co-relation 2626921. Up to 124419 conditions per place. [2023-08-30 22:54:17,196 INFO L137 encePairwiseOnDemand]: 96/129 looper letters, 1020 selfloop transitions, 983 changer transitions 0/2009 dead transitions. [2023-08-30 22:54:17,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 2009 transitions, 13649 flow [2023-08-30 22:54:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-30 22:54:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-30 22:54:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4578 transitions. [2023-08-30 22:54:17,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218878248974008 [2023-08-30 22:54:17,223 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4578 transitions. [2023-08-30 22:54:17,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4578 transitions. [2023-08-30 22:54:17,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:17,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4578 transitions. [2023-08-30 22:54:17,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 67.32352941176471) internal successors, (4578), 68 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:17,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 129.0) internal successors, (8901), 69 states have internal predecessors, (8901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:17,300 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 129.0) internal successors, (8901), 69 states have internal predecessors, (8901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:17,300 INFO L175 Difference]: Start difference. First operand has 73 places, 100 transitions, 701 flow. Second operand 68 states and 4578 transitions. [2023-08-30 22:54:17,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 2009 transitions, 13649 flow [2023-08-30 22:55:37,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 2009 transitions, 13649 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:55:37,176 INFO L231 Difference]: Finished difference. Result has 205 places, 1115 transitions, 12022 flow [2023-08-30 22:55:37,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12022, PETRI_PLACES=205, PETRI_TRANSITIONS=1115} [2023-08-30 22:55:37,177 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 154 predicate places. [2023-08-30 22:55:37,178 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 1115 transitions, 12022 flow [2023-08-30 22:55:37,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 43.266666666666666) internal successors, (649), 15 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:55:37,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:55:37,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:55:37,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 22:55:37,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 22:55:37,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:55:37,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:55:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash -155906351, now seen corresponding path program 1 times [2023-08-30 22:55:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:55:37,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66666332] [2023-08-30 22:55:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:55:37,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:55:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:55:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:55:37,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:55:37,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66666332] [2023-08-30 22:55:37,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66666332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:55:37,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:55:37,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:55:37,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059716377] [2023-08-30 22:55:37,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:55:37,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 22:55:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:55:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 22:55:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 22:55:37,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 129 [2023-08-30 22:55:37,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 1115 transitions, 12022 flow. Second operand has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:55:37,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:55:37,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 129 [2023-08-30 22:55:37,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand