./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races 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/48_ticket_lock_low_contention_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-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 ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 12:07:19,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 12:07:19,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 12:07:19,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 12:07:19,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 12:07:19,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 12:07:19,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 12:07:19,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 12:07:19,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 12:07:19,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 12:07:19,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 12:07:19,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 12:07:19,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 12:07:19,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 12:07:19,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 12:07:19,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 12:07:19,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 12:07:19,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 12:07:19,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 12:07:19,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 12:07:19,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 12:07:19,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 12:07:19,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 12:07:19,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 12:07:19,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 12:07:19,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 12:07:19,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 12:07:19,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 12:07:19,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 12:07:19,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 12:07:19,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 12:07:19,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 12:07:19,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 12:07:19,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 12:07:19,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 12:07:19,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 12:07:19,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 12:07:19,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 12:07:19,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 12:07:19,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 12:07:19,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 12:07:19,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 12:07:20,033 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 12:07:20,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 12:07:20,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 12:07:20,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 12:07:20,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 12:07:20,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 12:07:20,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 12:07:20,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 12:07:20,037 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 12:07:20,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 12:07:20,038 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 12:07:20,038 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 12:07:20,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 12:07:20,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 12:07:20,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 12:07:20,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 12:07:20,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 12:07:20,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 12:07:20,040 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 12:07:20,040 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 12:07:20,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 12:07:20,040 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 12:07:20,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 12:07:20,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 12:07:20,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 12:07:20,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 12:07:20,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 12:07:20,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 12:07:20,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 12:07:20,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 12:07:20,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 12:07:20,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 12:07:20,043 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 12:07:20,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 12:07:20,043 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 12:07:20,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 12:07:20,043 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 12:07:20,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 12:07:20,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 12:07:20,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 12:07:20,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 12:07:20,464 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 12:07:20,464 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 12:07:20,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-31 12:07:22,125 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 12:07:22,426 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 12:07:22,441 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-31 12:07:22,463 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a012b3c7/a5d5af7ee30e400d88a1bcf0d2ec4557/FLAGdb37b1841 [2023-08-31 12:07:22,483 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a012b3c7/a5d5af7ee30e400d88a1bcf0d2ec4557 [2023-08-31 12:07:22,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 12:07:22,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 12:07:22,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 12:07:22,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 12:07:22,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 12:07:22,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:22,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61592bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22, skipping insertion in model container [2023-08-31 12:07:22,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:22,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 12:07:22,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 12:07:22,750 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-31 12:07:22,859 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/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-08-31 12:07:22,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 12:07:22,873 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 12:07:22,886 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-31 12:07:22,912 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/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-08-31 12:07:22,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 12:07:22,956 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 12:07:22,957 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 12:07:22,957 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 12:07:22,963 INFO L208 MainTranslator]: Completed translation [2023-08-31 12:07:22,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22 WrapperNode [2023-08-31 12:07:22,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 12:07:22,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 12:07:22,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 12:07:22,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 12:07:22,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:22,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,049 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 189 [2023-08-31 12:07:23,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 12:07:23,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 12:07:23,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 12:07:23,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 12:07:23,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 12:07:23,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 12:07:23,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 12:07:23,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 12:07:23,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (1/1) ... [2023-08-31 12:07:23,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 12:07:23,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 12:07:23,179 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) [2023-08-31 12:07:23,213 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 [2023-08-31 12:07:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 12:07:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 12:07:23,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 12:07:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 12:07:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 12:07:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 12:07:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 12:07:23,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 12:07:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 12:07:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 12:07:23,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 12:07:23,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 12:07:23,252 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 12:07:23,438 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 12:07:23,440 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 12:07:23,869 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 12:07:24,118 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 12:07:24,119 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 12:07:24,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:07:24 BoogieIcfgContainer [2023-08-31 12:07:24,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 12:07:24,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 12:07:24,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 12:07:24,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 12:07:24,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:07:22" (1/3) ... [2023-08-31 12:07:24,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2568ccb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:07:24, skipping insertion in model container [2023-08-31 12:07:24,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:22" (2/3) ... [2023-08-31 12:07:24,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2568ccb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:07:24, skipping insertion in model container [2023-08-31 12:07:24,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:07:24" (3/3) ... [2023-08-31 12:07:24,130 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-08-31 12:07:24,138 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 12:07:24,207 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 12:07:24,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-08-31 12:07:24,208 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 12:07:24,306 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:24,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 112 transitions, 229 flow [2023-08-31 12:07:24,450 INFO L130 PetriNetUnfolder]: 8/169 cut-off events. [2023-08-31 12:07:24,450 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 12:07:24,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 169 events. 8/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 449 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 97. Up to 4 conditions per place. [2023-08-31 12:07:24,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 112 transitions, 229 flow [2023-08-31 12:07:24,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 112 transitions, 229 flow [2023-08-31 12:07:24,469 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:24,496 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 112 transitions, 229 flow [2023-08-31 12:07:24,502 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 112 transitions, 229 flow [2023-08-31 12:07:24,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 112 transitions, 229 flow [2023-08-31 12:07:24,544 INFO L130 PetriNetUnfolder]: 8/169 cut-off events. [2023-08-31 12:07:24,544 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 12:07:24,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 169 events. 8/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 449 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 97. Up to 4 conditions per place. [2023-08-31 12:07:24,548 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2023-08-31 12:07:25,934 INFO L134 LiptonReduction]: Checked pairs total: 14471 [2023-08-31 12:07:25,935 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-31 12:07:25,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:25,965 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:25,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:25,977 INFO L130 PetriNetUnfolder]: 2/29 cut-off events. [2023-08-31 12:07:25,977 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 12:07:25,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:25,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 12:07:25,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:25,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1307018239, now seen corresponding path program 1 times [2023-08-31 12:07:25,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:25,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870154845] [2023-08-31 12:07:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:25,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:26,120 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:26,169 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:26,171 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:26,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:26,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 12:07:26,174 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:26,186 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:26,187 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:26,187 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 12:07:26,232 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:26,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 151 transitions, 314 flow [2023-08-31 12:07:26,310 INFO L130 PetriNetUnfolder]: 13/267 cut-off events. [2023-08-31 12:07:26,311 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 12:07:26,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 267 events. 13/267 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 949 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 170. Up to 6 conditions per place. [2023-08-31 12:07:26,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 151 transitions, 314 flow [2023-08-31 12:07:26,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 151 transitions, 314 flow [2023-08-31 12:07:26,318 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:26,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 151 transitions, 314 flow [2023-08-31 12:07:26,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 151 transitions, 314 flow [2023-08-31 12:07:26,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 151 transitions, 314 flow [2023-08-31 12:07:26,355 INFO L130 PetriNetUnfolder]: 13/267 cut-off events. [2023-08-31 12:07:26,355 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 12:07:26,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 267 events. 13/267 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 949 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 170. Up to 6 conditions per place. [2023-08-31 12:07:26,366 INFO L119 LiptonReduction]: Number of co-enabled transitions 12084 [2023-08-31 12:07:27,789 INFO L134 LiptonReduction]: Checked pairs total: 52259 [2023-08-31 12:07:27,789 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-08-31 12:07:27,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:27,792 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:27,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:27,807 INFO L130 PetriNetUnfolder]: 4/71 cut-off events. [2023-08-31 12:07:27,807 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 12:07:27,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:27,808 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 12:07:27,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:27,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1028148937, now seen corresponding path program 1 times [2023-08-31 12:07:27,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:27,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499078867] [2023-08-31 12:07:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:27,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:27,852 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:27,906 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:27,909 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:27,910 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:27,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 12:07:27,911 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:27,912 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:27,912 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:27,912 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 12:07:27,955 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:27,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 401 flow [2023-08-31 12:07:28,022 INFO L130 PetriNetUnfolder]: 18/365 cut-off events. [2023-08-31 12:07:28,023 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 12:07:28,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 365 events. 18/365 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1469 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 271. Up to 8 conditions per place. [2023-08-31 12:07:28,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 190 transitions, 401 flow [2023-08-31 12:07:28,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 190 transitions, 401 flow [2023-08-31 12:07:28,030 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:28,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 190 transitions, 401 flow [2023-08-31 12:07:28,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 190 transitions, 401 flow [2023-08-31 12:07:28,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 401 flow [2023-08-31 12:07:28,090 INFO L130 PetriNetUnfolder]: 18/365 cut-off events. [2023-08-31 12:07:28,091 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 12:07:28,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 365 events. 18/365 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1469 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 271. Up to 8 conditions per place. [2023-08-31 12:07:28,108 INFO L119 LiptonReduction]: Number of co-enabled transitions 22572 [2023-08-31 12:07:29,454 INFO L134 LiptonReduction]: Checked pairs total: 103309 [2023-08-31 12:07:29,454 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-31 12:07:29,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:29,457 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:29,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:29,471 INFO L130 PetriNetUnfolder]: 7/123 cut-off events. [2023-08-31 12:07:29,471 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 12:07:29,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:29,471 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 12:07:29,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:29,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:29,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1058737471, now seen corresponding path program 1 times [2023-08-31 12:07:29,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:29,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091911346] [2023-08-31 12:07:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:29,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:29,513 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:29,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:29,556 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:29,557 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:29,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 12:07:29,557 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:29,558 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:29,558 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:29,558 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 12:07:29,604 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:29,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 229 transitions, 490 flow [2023-08-31 12:07:29,669 INFO L130 PetriNetUnfolder]: 23/463 cut-off events. [2023-08-31 12:07:29,669 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 12:07:29,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 463 events. 23/463 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1992 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 373. Up to 10 conditions per place. [2023-08-31 12:07:29,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 229 transitions, 490 flow [2023-08-31 12:07:29,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 229 transitions, 490 flow [2023-08-31 12:07:29,677 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:29,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 229 transitions, 490 flow [2023-08-31 12:07:29,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 229 transitions, 490 flow [2023-08-31 12:07:29,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 229 transitions, 490 flow [2023-08-31 12:07:29,732 INFO L130 PetriNetUnfolder]: 23/463 cut-off events. [2023-08-31 12:07:29,732 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 12:07:29,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 463 events. 23/463 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1992 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 373. Up to 10 conditions per place. [2023-08-31 12:07:29,753 INFO L119 LiptonReduction]: Number of co-enabled transitions 36024 [2023-08-31 12:07:31,117 INFO L134 LiptonReduction]: Checked pairs total: 144520 [2023-08-31 12:07:31,117 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-31 12:07:31,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:31,120 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:31,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:31,137 INFO L130 PetriNetUnfolder]: 10/185 cut-off events. [2023-08-31 12:07:31,137 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 12:07:31,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:31,138 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:31,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:31,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash -52564655, now seen corresponding path program 1 times [2023-08-31 12:07:31,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:31,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154920930] [2023-08-31 12:07:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:31,158 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:31,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:31,175 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:31,175 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:31,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 12:07:31,176 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:31,176 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:31,177 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:31,177 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 12:07:31,213 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:31,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 268 transitions, 581 flow [2023-08-31 12:07:31,312 INFO L130 PetriNetUnfolder]: 28/561 cut-off events. [2023-08-31 12:07:31,313 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 12:07:31,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 561 events. 28/561 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2486 event pairs, 0 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 476. Up to 12 conditions per place. [2023-08-31 12:07:31,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 268 transitions, 581 flow [2023-08-31 12:07:31,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 268 transitions, 581 flow [2023-08-31 12:07:31,326 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:31,326 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 268 transitions, 581 flow [2023-08-31 12:07:31,327 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 268 transitions, 581 flow [2023-08-31 12:07:31,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 268 transitions, 581 flow [2023-08-31 12:07:31,417 INFO L130 PetriNetUnfolder]: 28/561 cut-off events. [2023-08-31 12:07:31,417 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 12:07:31,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 561 events. 28/561 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2486 event pairs, 0 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 476. Up to 12 conditions per place. [2023-08-31 12:07:31,442 INFO L119 LiptonReduction]: Number of co-enabled transitions 52440 [2023-08-31 12:07:32,853 INFO L134 LiptonReduction]: Checked pairs total: 209652 [2023-08-31 12:07:32,853 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-31 12:07:32,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:32,855 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:32,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:32,887 INFO L130 PetriNetUnfolder]: 12/243 cut-off events. [2023-08-31 12:07:32,887 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 12:07:32,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:32,887 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:32,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:32,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:32,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1533733251, now seen corresponding path program 1 times [2023-08-31 12:07:32,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:32,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498046569] [2023-08-31 12:07:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:32,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:32,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:32,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:32,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:32,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:32,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 12:07:32,938 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:32,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:32,939 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:32,939 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 12:07:32,981 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:32,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 307 transitions, 674 flow [2023-08-31 12:07:33,091 INFO L130 PetriNetUnfolder]: 33/659 cut-off events. [2023-08-31 12:07:33,091 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 12:07:33,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 659 events. 33/659 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3009 event pairs, 0 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 581. Up to 14 conditions per place. [2023-08-31 12:07:33,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 307 transitions, 674 flow [2023-08-31 12:07:33,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 307 transitions, 674 flow [2023-08-31 12:07:33,108 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:33,108 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 305 places, 307 transitions, 674 flow [2023-08-31 12:07:33,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 305 places, 307 transitions, 674 flow [2023-08-31 12:07:33,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 307 transitions, 674 flow [2023-08-31 12:07:33,231 INFO L130 PetriNetUnfolder]: 33/659 cut-off events. [2023-08-31 12:07:33,232 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 12:07:33,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 659 events. 33/659 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3009 event pairs, 0 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 581. Up to 14 conditions per place. [2023-08-31 12:07:33,273 INFO L119 LiptonReduction]: Number of co-enabled transitions 71820 [2023-08-31 12:07:34,819 INFO L134 LiptonReduction]: Checked pairs total: 297456 [2023-08-31 12:07:34,819 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-31 12:07:34,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:34,821 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:34,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:34,855 INFO L130 PetriNetUnfolder]: 16/311 cut-off events. [2023-08-31 12:07:34,856 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 12:07:34,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:34,856 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:34,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:34,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:34,857 INFO L85 PathProgramCache]: Analyzing trace with hash -893661585, now seen corresponding path program 1 times [2023-08-31 12:07:34,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:34,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399018572] [2023-08-31 12:07:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:34,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:34,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:34,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:34,924 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:34,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:34,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 12:07:34,925 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:34,925 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:34,925 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:34,925 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 12:07:34,970 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:34,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 346 transitions, 769 flow [2023-08-31 12:07:35,109 INFO L130 PetriNetUnfolder]: 38/757 cut-off events. [2023-08-31 12:07:35,109 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 12:07:35,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 757 events. 38/757 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3511 event pairs, 0 based on Foata normal form. 0/531 useless extension candidates. Maximal degree in co-relation 688. Up to 16 conditions per place. [2023-08-31 12:07:35,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 346 transitions, 769 flow [2023-08-31 12:07:35,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 346 transitions, 769 flow [2023-08-31 12:07:35,128 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:35,128 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 344 places, 346 transitions, 769 flow [2023-08-31 12:07:35,129 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 344 places, 346 transitions, 769 flow [2023-08-31 12:07:35,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 346 transitions, 769 flow [2023-08-31 12:07:35,284 INFO L130 PetriNetUnfolder]: 38/757 cut-off events. [2023-08-31 12:07:35,284 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 12:07:35,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 757 events. 38/757 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3511 event pairs, 0 based on Foata normal form. 0/531 useless extension candidates. Maximal degree in co-relation 688. Up to 16 conditions per place. [2023-08-31 12:07:35,333 INFO L119 LiptonReduction]: Number of co-enabled transitions 94164 [2023-08-31 12:07:36,822 INFO L134 LiptonReduction]: Checked pairs total: 468400 [2023-08-31 12:07:36,823 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-31 12:07:36,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:36,825 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:36,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:36,868 INFO L130 PetriNetUnfolder]: 18/371 cut-off events. [2023-08-31 12:07:36,868 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 12:07:36,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:36,868 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:36,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:36,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash 124177310, now seen corresponding path program 1 times [2023-08-31 12:07:36,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:36,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337026464] [2023-08-31 12:07:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:36,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:36,909 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:36,941 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:36,941 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:36,941 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:36,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 12:07:36,942 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:36,942 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:36,942 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:36,943 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 12:07:37,002 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:37,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 385 transitions, 866 flow [2023-08-31 12:07:37,168 INFO L130 PetriNetUnfolder]: 43/855 cut-off events. [2023-08-31 12:07:37,168 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 12:07:37,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 855 events. 43/855 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4050 event pairs, 0 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 796. Up to 18 conditions per place. [2023-08-31 12:07:37,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 385 transitions, 866 flow [2023-08-31 12:07:37,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 383 places, 385 transitions, 866 flow [2023-08-31 12:07:37,196 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:37,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 383 places, 385 transitions, 866 flow [2023-08-31 12:07:37,197 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 383 places, 385 transitions, 866 flow [2023-08-31 12:07:37,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 385 transitions, 866 flow [2023-08-31 12:07:37,344 INFO L130 PetriNetUnfolder]: 43/855 cut-off events. [2023-08-31 12:07:37,345 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 12:07:37,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 855 events. 43/855 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4050 event pairs, 0 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 796. Up to 18 conditions per place. [2023-08-31 12:07:37,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 119472 [2023-08-31 12:07:39,028 INFO L134 LiptonReduction]: Checked pairs total: 492487 [2023-08-31 12:07:39,028 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-31 12:07:39,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:39,030 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:39,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:39,087 INFO L130 PetriNetUnfolder]: 20/424 cut-off events. [2023-08-31 12:07:39,088 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 12:07:39,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:39,088 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:39,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:39,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1255990827, now seen corresponding path program 1 times [2023-08-31 12:07:39,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:39,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774773478] [2023-08-31 12:07:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:39,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:39,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:39,127 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:39,127 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:39,127 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:39,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 12:07:39,128 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:39,128 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:39,128 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:39,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 12:07:39,182 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:39,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 422 places, 424 transitions, 965 flow [2023-08-31 12:07:39,393 INFO L130 PetriNetUnfolder]: 48/953 cut-off events. [2023-08-31 12:07:39,394 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 12:07:39,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 953 events. 48/953 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4534 event pairs, 0 based on Foata normal form. 0/667 useless extension candidates. Maximal degree in co-relation 905. Up to 20 conditions per place. [2023-08-31 12:07:39,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 422 places, 424 transitions, 965 flow [2023-08-31 12:07:39,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 422 places, 424 transitions, 965 flow [2023-08-31 12:07:39,423 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:39,424 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 422 places, 424 transitions, 965 flow [2023-08-31 12:07:39,424 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 422 places, 424 transitions, 965 flow [2023-08-31 12:07:39,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 422 places, 424 transitions, 965 flow [2023-08-31 12:07:39,633 INFO L130 PetriNetUnfolder]: 48/953 cut-off events. [2023-08-31 12:07:39,634 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 12:07:39,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 953 events. 48/953 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4534 event pairs, 0 based on Foata normal form. 0/667 useless extension candidates. Maximal degree in co-relation 905. Up to 20 conditions per place. [2023-08-31 12:07:39,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 147744 [2023-08-31 12:07:41,421 INFO L134 LiptonReduction]: Checked pairs total: 630950 [2023-08-31 12:07:41,421 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-31 12:07:41,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:41,423 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:41,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:41,490 INFO L130 PetriNetUnfolder]: 23/490 cut-off events. [2023-08-31 12:07:41,490 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 12:07:41,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:41,491 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:41,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:41,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash 392025796, now seen corresponding path program 1 times [2023-08-31 12:07:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:41,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213336845] [2023-08-31 12:07:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:41,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:41,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:41,528 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:41,528 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:41,528 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:41,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 12:07:41,528 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:41,529 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:41,529 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:41,529 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 12:07:41,597 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:41,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 461 places, 463 transitions, 1066 flow [2023-08-31 12:07:41,834 INFO L130 PetriNetUnfolder]: 53/1051 cut-off events. [2023-08-31 12:07:41,834 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 12:07:41,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 1051 events. 53/1051 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5054 event pairs, 0 based on Foata normal form. 0/735 useless extension candidates. Maximal degree in co-relation 1015. Up to 22 conditions per place. [2023-08-31 12:07:41,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 461 places, 463 transitions, 1066 flow [2023-08-31 12:07:41,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 461 places, 463 transitions, 1066 flow [2023-08-31 12:07:41,875 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:41,875 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 461 places, 463 transitions, 1066 flow [2023-08-31 12:07:41,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 461 places, 463 transitions, 1066 flow [2023-08-31 12:07:41,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 461 places, 463 transitions, 1066 flow [2023-08-31 12:07:42,133 INFO L130 PetriNetUnfolder]: 53/1051 cut-off events. [2023-08-31 12:07:42,134 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 12:07:42,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 1051 events. 53/1051 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5054 event pairs, 0 based on Foata normal form. 0/735 useless extension candidates. Maximal degree in co-relation 1015. Up to 22 conditions per place. [2023-08-31 12:07:42,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 178980 [2023-08-31 12:07:45,366 INFO L134 LiptonReduction]: Checked pairs total: 921849 [2023-08-31 12:07:45,367 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-31 12:07:45,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:45,368 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:45,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:45,477 INFO L130 PetriNetUnfolder]: 26/552 cut-off events. [2023-08-31 12:07:45,478 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 12:07:45,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:45,478 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:45,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:45,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash 486115803, now seen corresponding path program 1 times [2023-08-31 12:07:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:45,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923666646] [2023-08-31 12:07:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:45,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:45,557 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:45,557 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:45,557 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:45,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 12:07:45,558 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:45,558 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:45,558 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:45,558 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 12:07:45,657 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:45,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 502 transitions, 1169 flow [2023-08-31 12:07:45,956 INFO L130 PetriNetUnfolder]: 58/1149 cut-off events. [2023-08-31 12:07:45,956 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 12:07:46,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1249 conditions, 1149 events. 58/1149 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5560 event pairs, 0 based on Foata normal form. 0/803 useless extension candidates. Maximal degree in co-relation 1126. Up to 24 conditions per place. [2023-08-31 12:07:46,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 500 places, 502 transitions, 1169 flow [2023-08-31 12:07:46,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 500 places, 502 transitions, 1169 flow [2023-08-31 12:07:46,008 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:46,008 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 500 places, 502 transitions, 1169 flow [2023-08-31 12:07:46,008 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 500 places, 502 transitions, 1169 flow [2023-08-31 12:07:46,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 502 transitions, 1169 flow [2023-08-31 12:07:46,310 INFO L130 PetriNetUnfolder]: 58/1149 cut-off events. [2023-08-31 12:07:46,311 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 12:07:46,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1249 conditions, 1149 events. 58/1149 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5560 event pairs, 0 based on Foata normal form. 0/803 useless extension candidates. Maximal degree in co-relation 1126. Up to 24 conditions per place. [2023-08-31 12:07:46,446 INFO L119 LiptonReduction]: Number of co-enabled transitions 213180 [2023-08-31 12:07:49,046 INFO L134 LiptonReduction]: Checked pairs total: 918739 [2023-08-31 12:07:49,047 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-31 12:07:49,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:49,053 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:49,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:49,205 INFO L130 PetriNetUnfolder]: 30/614 cut-off events. [2023-08-31 12:07:49,206 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 12:07:49,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:49,206 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:49,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:49,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:49,207 INFO L85 PathProgramCache]: Analyzing trace with hash 784937192, now seen corresponding path program 1 times [2023-08-31 12:07:49,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:49,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482606785] [2023-08-31 12:07:49,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:49,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:49,260 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:49,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:49,293 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:49,295 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:49,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 12:07:49,296 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:49,296 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:49,297 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:49,297 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 12:07:49,374 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:49,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 539 places, 541 transitions, 1274 flow [2023-08-31 12:07:49,775 INFO L130 PetriNetUnfolder]: 63/1247 cut-off events. [2023-08-31 12:07:49,776 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 12:07:49,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 1247 events. 63/1247 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6076 event pairs, 0 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 1238. Up to 26 conditions per place. [2023-08-31 12:07:49,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 539 places, 541 transitions, 1274 flow [2023-08-31 12:07:49,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 539 places, 541 transitions, 1274 flow [2023-08-31 12:07:49,813 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:49,813 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 539 places, 541 transitions, 1274 flow [2023-08-31 12:07:49,814 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 539 places, 541 transitions, 1274 flow [2023-08-31 12:07:49,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 539 places, 541 transitions, 1274 flow [2023-08-31 12:07:50,195 INFO L130 PetriNetUnfolder]: 63/1247 cut-off events. [2023-08-31 12:07:50,196 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 12:07:50,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 1247 events. 63/1247 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6076 event pairs, 0 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 1238. Up to 26 conditions per place. [2023-08-31 12:07:50,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 250344 [2023-08-31 12:07:52,982 INFO L134 LiptonReduction]: Checked pairs total: 1108526 [2023-08-31 12:07:52,983 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-08-31 12:07:52,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:52,993 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:52,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:53,148 INFO L130 PetriNetUnfolder]: 34/672 cut-off events. [2023-08-31 12:07:53,149 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 12:07:53,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:53,149 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:53,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:53,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:53,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1116159817, now seen corresponding path program 1 times [2023-08-31 12:07:53,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:53,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624062330] [2023-08-31 12:07:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:53,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:53,236 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:53,273 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:53,274 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:53,274 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:53,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 12:07:53,274 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:53,278 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:53,278 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:53,278 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 12:07:53,370 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:53,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 578 places, 580 transitions, 1381 flow [2023-08-31 12:07:53,756 INFO L130 PetriNetUnfolder]: 68/1345 cut-off events. [2023-08-31 12:07:53,757 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 12:07:53,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1476 conditions, 1345 events. 68/1345 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6598 event pairs, 0 based on Foata normal form. 0/939 useless extension candidates. Maximal degree in co-relation 1351. Up to 28 conditions per place. [2023-08-31 12:07:53,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 578 places, 580 transitions, 1381 flow [2023-08-31 12:07:53,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 578 places, 580 transitions, 1381 flow [2023-08-31 12:07:53,830 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:53,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 578 places, 580 transitions, 1381 flow [2023-08-31 12:07:53,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 578 places, 580 transitions, 1381 flow [2023-08-31 12:07:53,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 578 places, 580 transitions, 1381 flow [2023-08-31 12:07:54,229 INFO L130 PetriNetUnfolder]: 68/1345 cut-off events. [2023-08-31 12:07:54,229 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 12:07:54,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1476 conditions, 1345 events. 68/1345 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6598 event pairs, 0 based on Foata normal form. 0/939 useless extension candidates. Maximal degree in co-relation 1351. Up to 28 conditions per place. [2023-08-31 12:07:54,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 290472 [2023-08-31 12:07:57,166 INFO L134 LiptonReduction]: Checked pairs total: 1238778 [2023-08-31 12:07:57,166 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-08-31 12:07:57,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:57,168 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:57,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:57,303 INFO L130 PetriNetUnfolder]: 35/735 cut-off events. [2023-08-31 12:07:57,303 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 12:07:57,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:57,303 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:07:57,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:57,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1223015112, now seen corresponding path program 1 times [2023-08-31 12:07:57,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:57,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412717663] [2023-08-31 12:07:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:57,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:57,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:57,364 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:57,365 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:57,365 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 12:07:57,365 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:57,366 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:57,366 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:57,366 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 12:07:57,470 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:57,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 617 places, 619 transitions, 1490 flow [2023-08-31 12:07:57,976 INFO L130 PetriNetUnfolder]: 73/1443 cut-off events. [2023-08-31 12:07:57,977 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 12:07:58,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 1443 events. 73/1443 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 7124 event pairs, 0 based on Foata normal form. 0/1007 useless extension candidates. Maximal degree in co-relation 1465. Up to 30 conditions per place. [2023-08-31 12:07:58,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 617 places, 619 transitions, 1490 flow [2023-08-31 12:07:58,061 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 617 places, 619 transitions, 1490 flow [2023-08-31 12:07:58,061 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:58,061 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 617 places, 619 transitions, 1490 flow [2023-08-31 12:07:58,061 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 617 places, 619 transitions, 1490 flow [2023-08-31 12:07:58,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 617 places, 619 transitions, 1490 flow [2023-08-31 12:07:58,509 INFO L130 PetriNetUnfolder]: 73/1443 cut-off events. [2023-08-31 12:07:58,509 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 12:07:58,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 1443 events. 73/1443 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 7124 event pairs, 0 based on Foata normal form. 0/1007 useless extension candidates. Maximal degree in co-relation 1465. Up to 30 conditions per place. [2023-08-31 12:07:58,679 INFO L119 LiptonReduction]: Number of co-enabled transitions 333564 [2023-08-31 12:08:01,383 INFO L134 LiptonReduction]: Checked pairs total: 1744732 [2023-08-31 12:08:01,383 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-31 12:08:01,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:01,385 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:01,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:01,515 INFO L130 PetriNetUnfolder]: 36/787 cut-off events. [2023-08-31 12:08:01,515 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 12:08:01,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:01,515 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:01,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:01,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:01,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1633214377, now seen corresponding path program 1 times [2023-08-31 12:08:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:01,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534733244] [2023-08-31 12:08:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:01,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:01,548 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:01,576 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:01,576 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:01,577 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:01,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 12:08:01,577 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:01,577 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:01,578 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:01,578 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 12:08:01,672 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:01,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 656 places, 658 transitions, 1601 flow [2023-08-31 12:08:02,156 INFO L130 PetriNetUnfolder]: 78/1541 cut-off events. [2023-08-31 12:08:02,156 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 12:08:02,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1707 conditions, 1541 events. 78/1541 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 7661 event pairs, 0 based on Foata normal form. 0/1075 useless extension candidates. Maximal degree in co-relation 1580. Up to 32 conditions per place. [2023-08-31 12:08:02,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 656 places, 658 transitions, 1601 flow [2023-08-31 12:08:02,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 656 places, 658 transitions, 1601 flow [2023-08-31 12:08:02,214 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:02,214 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 656 places, 658 transitions, 1601 flow [2023-08-31 12:08:02,214 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 656 places, 658 transitions, 1601 flow [2023-08-31 12:08:02,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 656 places, 658 transitions, 1601 flow [2023-08-31 12:08:02,610 INFO L130 PetriNetUnfolder]: 78/1541 cut-off events. [2023-08-31 12:08:02,610 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 12:08:02,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1707 conditions, 1541 events. 78/1541 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 7661 event pairs, 0 based on Foata normal form. 0/1075 useless extension candidates. Maximal degree in co-relation 1580. Up to 32 conditions per place. [2023-08-31 12:08:02,817 INFO L119 LiptonReduction]: Number of co-enabled transitions 379620 [2023-08-31 12:08:05,188 INFO L134 LiptonReduction]: Checked pairs total: 1675859 [2023-08-31 12:08:05,188 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-08-31 12:08:05,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:05,190 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:05,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:05,324 INFO L130 PetriNetUnfolder]: 42/858 cut-off events. [2023-08-31 12:08:05,324 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 12:08:05,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:05,324 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:05,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:05,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:05,325 INFO L85 PathProgramCache]: Analyzing trace with hash -281249956, now seen corresponding path program 1 times [2023-08-31 12:08:05,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:05,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436724763] [2023-08-31 12:08:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:05,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:05,356 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:05,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:05,386 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:05,386 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:05,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 12:08:05,386 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:05,387 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:05,387 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:05,387 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 12:08:05,505 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:05,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 695 places, 697 transitions, 1714 flow [2023-08-31 12:08:05,992 INFO L130 PetriNetUnfolder]: 83/1639 cut-off events. [2023-08-31 12:08:05,992 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 12:08:06,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 1639 events. 83/1639 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8149 event pairs, 0 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 1696. Up to 34 conditions per place. [2023-08-31 12:08:06,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 695 places, 697 transitions, 1714 flow [2023-08-31 12:08:06,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 695 places, 697 transitions, 1714 flow [2023-08-31 12:08:06,076 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:06,077 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 695 places, 697 transitions, 1714 flow [2023-08-31 12:08:06,077 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 695 places, 697 transitions, 1714 flow [2023-08-31 12:08:06,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 695 places, 697 transitions, 1714 flow [2023-08-31 12:08:06,517 INFO L130 PetriNetUnfolder]: 83/1639 cut-off events. [2023-08-31 12:08:06,517 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 12:08:06,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 1639 events. 83/1639 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8149 event pairs, 0 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 1696. Up to 34 conditions per place. [2023-08-31 12:08:06,681 INFO L119 LiptonReduction]: Number of co-enabled transitions 428640 [2023-08-31 12:08:09,309 INFO L134 LiptonReduction]: Checked pairs total: 1893653 [2023-08-31 12:08:09,309 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-31 12:08:09,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:09,311 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:09,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:09,484 INFO L130 PetriNetUnfolder]: 43/916 cut-off events. [2023-08-31 12:08:09,485 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 12:08:09,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:09,485 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:09,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:09,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:09,485 INFO L85 PathProgramCache]: Analyzing trace with hash 775555185, now seen corresponding path program 1 times [2023-08-31 12:08:09,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:09,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497818457] [2023-08-31 12:08:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:09,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:09,512 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:09,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:09,544 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:09,544 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:09,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 12:08:09,545 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:09,545 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:09,545 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:09,545 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 12:08:09,637 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:09,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 734 places, 736 transitions, 1829 flow [2023-08-31 12:08:10,219 INFO L130 PetriNetUnfolder]: 88/1737 cut-off events. [2023-08-31 12:08:10,219 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 12:08:10,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 1737 events. 88/1737 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8658 event pairs, 0 based on Foata normal form. 0/1211 useless extension candidates. Maximal degree in co-relation 1813. Up to 36 conditions per place. [2023-08-31 12:08:10,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 734 places, 736 transitions, 1829 flow [2023-08-31 12:08:10,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 734 places, 736 transitions, 1829 flow [2023-08-31 12:08:10,276 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:10,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 734 places, 736 transitions, 1829 flow [2023-08-31 12:08:10,276 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 734 places, 736 transitions, 1829 flow [2023-08-31 12:08:10,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 734 places, 736 transitions, 1829 flow [2023-08-31 12:08:10,714 INFO L130 PetriNetUnfolder]: 88/1737 cut-off events. [2023-08-31 12:08:10,715 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 12:08:10,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 1737 events. 88/1737 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8658 event pairs, 0 based on Foata normal form. 0/1211 useless extension candidates. Maximal degree in co-relation 1813. Up to 36 conditions per place. [2023-08-31 12:08:10,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 480624 [2023-08-31 12:08:13,691 INFO L134 LiptonReduction]: Checked pairs total: 2557627 [2023-08-31 12:08:13,691 INFO L136 LiptonReduction]: Total number of compositions: 260 [2023-08-31 12:08:13,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:13,693 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:13,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:13,867 INFO L130 PetriNetUnfolder]: 47/974 cut-off events. [2023-08-31 12:08:13,867 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 12:08:13,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:13,867 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:13,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:13,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:13,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1349360116, now seen corresponding path program 1 times [2023-08-31 12:08:13,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:13,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56919716] [2023-08-31 12:08:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:13,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:13,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:13,923 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:13,923 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:13,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:13,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 12:08:13,924 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:13,924 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:13,924 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:13,924 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 12:08:14,019 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:14,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 773 places, 775 transitions, 1946 flow [2023-08-31 12:08:14,706 INFO L130 PetriNetUnfolder]: 93/1835 cut-off events. [2023-08-31 12:08:14,706 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 12:08:14,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 1835 events. 93/1835 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 9189 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 1931. Up to 38 conditions per place. [2023-08-31 12:08:14,813 INFO L82 GeneralOperation]: Start removeDead. Operand has 773 places, 775 transitions, 1946 flow [2023-08-31 12:08:14,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 773 places, 775 transitions, 1946 flow [2023-08-31 12:08:14,827 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:14,827 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 773 places, 775 transitions, 1946 flow [2023-08-31 12:08:14,827 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 773 places, 775 transitions, 1946 flow [2023-08-31 12:08:14,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 773 places, 775 transitions, 1946 flow [2023-08-31 12:08:15,569 INFO L130 PetriNetUnfolder]: 93/1835 cut-off events. [2023-08-31 12:08:15,570 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 12:08:15,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 1835 events. 93/1835 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 9189 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 1931. Up to 38 conditions per place. [2023-08-31 12:08:15,875 INFO L119 LiptonReduction]: Number of co-enabled transitions 535572 [2023-08-31 12:08:19,511 INFO L134 LiptonReduction]: Checked pairs total: 2388096 [2023-08-31 12:08:19,512 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-08-31 12:08:19,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:19,514 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:19,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:19,811 INFO L130 PetriNetUnfolder]: 50/1040 cut-off events. [2023-08-31 12:08:19,811 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 12:08:19,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:19,811 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:19,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:19,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:19,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1349077452, now seen corresponding path program 1 times [2023-08-31 12:08:19,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:19,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460893647] [2023-08-31 12:08:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:19,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:19,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:19,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:19,893 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:19,893 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:19,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 12:08:19,894 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:19,894 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:19,895 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:19,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 12:08:20,012 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:20,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 812 places, 814 transitions, 2065 flow [2023-08-31 12:08:20,784 INFO L130 PetriNetUnfolder]: 98/1933 cut-off events. [2023-08-31 12:08:20,784 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 12:08:20,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2181 conditions, 1933 events. 98/1933 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 9436 event pairs, 0 based on Foata normal form. 0/1347 useless extension candidates. Maximal degree in co-relation 2050. Up to 40 conditions per place. [2023-08-31 12:08:20,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 812 places, 814 transitions, 2065 flow [2023-08-31 12:08:20,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 812 places, 814 transitions, 2065 flow [2023-08-31 12:08:20,932 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:20,932 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 812 places, 814 transitions, 2065 flow [2023-08-31 12:08:20,932 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 812 places, 814 transitions, 2065 flow [2023-08-31 12:08:20,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 812 places, 814 transitions, 2065 flow [2023-08-31 12:08:21,644 INFO L130 PetriNetUnfolder]: 98/1933 cut-off events. [2023-08-31 12:08:21,644 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 12:08:21,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2181 conditions, 1933 events. 98/1933 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 9436 event pairs, 0 based on Foata normal form. 0/1347 useless extension candidates. Maximal degree in co-relation 2050. Up to 40 conditions per place. [2023-08-31 12:08:21,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 593484 [2023-08-31 12:08:25,071 INFO L134 LiptonReduction]: Checked pairs total: 2624577 [2023-08-31 12:08:25,071 INFO L136 LiptonReduction]: Total number of compositions: 284 [2023-08-31 12:08:25,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:25,074 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:25,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:25,293 INFO L130 PetriNetUnfolder]: 71/1136 cut-off events. [2023-08-31 12:08:25,293 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 12:08:25,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:25,293 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:25,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:25,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1865573126, now seen corresponding path program 1 times [2023-08-31 12:08:25,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:25,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312309524] [2023-08-31 12:08:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:25,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:25,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:25,376 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:25,376 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:25,376 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:25,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 12:08:25,377 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:25,377 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:25,377 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:25,378 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 12:08:25,478 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:25,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 851 places, 853 transitions, 2186 flow [2023-08-31 12:08:26,201 INFO L130 PetriNetUnfolder]: 103/2031 cut-off events. [2023-08-31 12:08:26,201 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 12:08:26,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 2031 events. 103/2031 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 9908 event pairs, 0 based on Foata normal form. 0/1415 useless extension candidates. Maximal degree in co-relation 2170. Up to 42 conditions per place. [2023-08-31 12:08:26,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 851 places, 853 transitions, 2186 flow [2023-08-31 12:08:26,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 851 places, 853 transitions, 2186 flow [2023-08-31 12:08:26,291 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:26,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 851 places, 853 transitions, 2186 flow [2023-08-31 12:08:26,292 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 851 places, 853 transitions, 2186 flow [2023-08-31 12:08:26,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 851 places, 853 transitions, 2186 flow [2023-08-31 12:08:26,898 INFO L130 PetriNetUnfolder]: 103/2031 cut-off events. [2023-08-31 12:08:26,898 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 12:08:27,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 2031 events. 103/2031 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 9908 event pairs, 0 based on Foata normal form. 0/1415 useless extension candidates. Maximal degree in co-relation 2170. Up to 42 conditions per place. [2023-08-31 12:08:27,253 INFO L119 LiptonReduction]: Number of co-enabled transitions 654360 [2023-08-31 12:08:31,671 INFO L134 LiptonReduction]: Checked pairs total: 2889006 [2023-08-31 12:08:31,671 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-08-31 12:08:31,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:31,673 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:31,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:32,031 INFO L130 PetriNetUnfolder]: 74/1202 cut-off events. [2023-08-31 12:08:32,031 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 12:08:32,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:32,032 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:32,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:32,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:32,032 INFO L85 PathProgramCache]: Analyzing trace with hash 440764791, now seen corresponding path program 1 times [2023-08-31 12:08:32,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:32,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809469032] [2023-08-31 12:08:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:32,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:32,072 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:32,112 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:32,112 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:32,112 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:32,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 12:08:32,113 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:32,113 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:32,113 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:32,114 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 12:08:32,276 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:32,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 890 places, 892 transitions, 2309 flow [2023-08-31 12:08:33,263 INFO L130 PetriNetUnfolder]: 108/2129 cut-off events. [2023-08-31 12:08:33,263 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 12:08:33,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2424 conditions, 2129 events. 108/2129 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 10471 event pairs, 0 based on Foata normal form. 0/1483 useless extension candidates. Maximal degree in co-relation 2291. Up to 44 conditions per place. [2023-08-31 12:08:33,414 INFO L82 GeneralOperation]: Start removeDead. Operand has 890 places, 892 transitions, 2309 flow [2023-08-31 12:08:33,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 890 places, 892 transitions, 2309 flow [2023-08-31 12:08:33,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:33,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 890 places, 892 transitions, 2309 flow [2023-08-31 12:08:33,432 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 890 places, 892 transitions, 2309 flow [2023-08-31 12:08:33,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 890 places, 892 transitions, 2309 flow [2023-08-31 12:08:34,351 INFO L130 PetriNetUnfolder]: 108/2129 cut-off events. [2023-08-31 12:08:34,352 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 12:08:34,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2424 conditions, 2129 events. 108/2129 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 10471 event pairs, 0 based on Foata normal form. 0/1483 useless extension candidates. Maximal degree in co-relation 2291. Up to 44 conditions per place. [2023-08-31 12:08:34,628 INFO L119 LiptonReduction]: Number of co-enabled transitions 718200 [2023-08-31 12:08:37,881 INFO L134 LiptonReduction]: Checked pairs total: 3795965 [2023-08-31 12:08:37,882 INFO L136 LiptonReduction]: Total number of compositions: 303 [2023-08-31 12:08:37,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:37,883 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:37,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:38,247 INFO L130 PetriNetUnfolder]: 76/1261 cut-off events. [2023-08-31 12:08:38,248 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 12:08:38,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:38,248 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:38,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:38,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:38,248 INFO L85 PathProgramCache]: Analyzing trace with hash -105125419, now seen corresponding path program 1 times [2023-08-31 12:08:38,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:38,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347282598] [2023-08-31 12:08:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:38,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:38,291 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:38,330 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:38,330 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:38,330 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:38,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 12:08:38,331 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:38,331 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:38,331 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:38,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 12:08:38,474 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:38,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 929 places, 931 transitions, 2434 flow [2023-08-31 12:08:39,340 INFO L130 PetriNetUnfolder]: 113/2227 cut-off events. [2023-08-31 12:08:39,340 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 12:08:39,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 2227 events. 113/2227 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 10946 event pairs, 0 based on Foata normal form. 0/1551 useless extension candidates. Maximal degree in co-relation 2413. Up to 46 conditions per place. [2023-08-31 12:08:39,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 929 places, 931 transitions, 2434 flow [2023-08-31 12:08:39,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 929 places, 931 transitions, 2434 flow [2023-08-31 12:08:39,492 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:39,492 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 929 places, 931 transitions, 2434 flow [2023-08-31 12:08:39,492 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 929 places, 931 transitions, 2434 flow [2023-08-31 12:08:39,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 929 places, 931 transitions, 2434 flow [2023-08-31 12:08:40,356 INFO L130 PetriNetUnfolder]: 113/2227 cut-off events. [2023-08-31 12:08:40,357 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 12:08:40,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 2227 events. 113/2227 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 10946 event pairs, 0 based on Foata normal form. 0/1551 useless extension candidates. Maximal degree in co-relation 2413. Up to 46 conditions per place. [2023-08-31 12:08:40,775 INFO L119 LiptonReduction]: Number of co-enabled transitions 785004 [2023-08-31 12:08:46,181 INFO L134 LiptonReduction]: Checked pairs total: 3414526 [2023-08-31 12:08:46,182 INFO L136 LiptonReduction]: Total number of compositions: 319 [2023-08-31 12:08:46,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:46,184 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:46,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:46,631 INFO L130 PetriNetUnfolder]: 80/1323 cut-off events. [2023-08-31 12:08:46,631 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 12:08:46,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:46,632 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:46,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:46,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:46,632 INFO L85 PathProgramCache]: Analyzing trace with hash -302225256, now seen corresponding path program 1 times [2023-08-31 12:08:46,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:46,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157051985] [2023-08-31 12:08:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:46,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:46,675 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:46,724 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:46,724 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:46,724 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:46,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 12:08:46,725 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:46,725 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:46,725 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:46,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-31 12:08:46,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:46,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 968 places, 970 transitions, 2561 flow [2023-08-31 12:08:48,023 INFO L130 PetriNetUnfolder]: 118/2325 cut-off events. [2023-08-31 12:08:48,024 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 12:08:48,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2671 conditions, 2325 events. 118/2325 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 11490 event pairs, 0 based on Foata normal form. 0/1619 useless extension candidates. Maximal degree in co-relation 2536. Up to 48 conditions per place. [2023-08-31 12:08:48,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 968 places, 970 transitions, 2561 flow [2023-08-31 12:08:48,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 968 places, 970 transitions, 2561 flow [2023-08-31 12:08:48,256 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:48,256 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 968 places, 970 transitions, 2561 flow [2023-08-31 12:08:48,256 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 968 places, 970 transitions, 2561 flow [2023-08-31 12:08:48,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 968 places, 970 transitions, 2561 flow [2023-08-31 12:08:49,358 INFO L130 PetriNetUnfolder]: 118/2325 cut-off events. [2023-08-31 12:08:49,358 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 12:08:49,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2671 conditions, 2325 events. 118/2325 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 11490 event pairs, 0 based on Foata normal form. 0/1619 useless extension candidates. Maximal degree in co-relation 2536. Up to 48 conditions per place. [2023-08-31 12:08:49,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 854772 [2023-08-31 12:08:54,070 INFO L134 LiptonReduction]: Checked pairs total: 4561939 [2023-08-31 12:08:54,071 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-08-31 12:08:54,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:54,073 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:54,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:54,531 INFO L130 PetriNetUnfolder]: 85/1389 cut-off events. [2023-08-31 12:08:54,531 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 12:08:54,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:54,531 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:08:54,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:54,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 621705874, now seen corresponding path program 1 times [2023-08-31 12:08:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:54,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333981352] [2023-08-31 12:08:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:54,595 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:54,640 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:54,640 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:54,641 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:54,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 12:08:54,641 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:54,641 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:54,641 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:54,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-31 12:08:54,771 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:54,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1007 places, 1009 transitions, 2690 flow [2023-08-31 12:08:56,269 INFO L130 PetriNetUnfolder]: 123/2423 cut-off events. [2023-08-31 12:08:56,269 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 12:08:56,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 2423 events. 123/2423 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 11966 event pairs, 0 based on Foata normal form. 0/1687 useless extension candidates. Maximal degree in co-relation 2660. Up to 50 conditions per place. [2023-08-31 12:08:56,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 1007 places, 1009 transitions, 2690 flow [2023-08-31 12:08:56,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1007 places, 1009 transitions, 2690 flow [2023-08-31 12:08:56,414 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:56,414 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1007 places, 1009 transitions, 2690 flow [2023-08-31 12:08:56,414 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1007 places, 1009 transitions, 2690 flow [2023-08-31 12:08:56,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1007 places, 1009 transitions, 2690 flow [2023-08-31 12:08:57,682 INFO L130 PetriNetUnfolder]: 123/2423 cut-off events. [2023-08-31 12:08:57,682 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 12:08:57,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 2423 events. 123/2423 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 11966 event pairs, 0 based on Foata normal form. 0/1687 useless extension candidates. Maximal degree in co-relation 2660. Up to 50 conditions per place. [2023-08-31 12:08:58,591 INFO L119 LiptonReduction]: Number of co-enabled transitions 927504 [2023-08-31 12:09:02,896 INFO L134 LiptonReduction]: Checked pairs total: 4912792 [2023-08-31 12:09:02,896 INFO L136 LiptonReduction]: Total number of compositions: 342 [2023-08-31 12:09:02,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:09:02,897 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:09:02,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:09:03,405 INFO L130 PetriNetUnfolder]: 88/1450 cut-off events. [2023-08-31 12:09:03,405 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 12:09:03,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:09:03,405 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:09:03,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:09:03,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:09:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash -193692656, now seen corresponding path program 1 times [2023-08-31 12:09:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:09:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971244835] [2023-08-31 12:09:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:09:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:09:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:03,490 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:09:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:03,536 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:09:03,537 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:09:03,537 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:09:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 12:09:03,537 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:09:03,537 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:09:03,538 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:09:03,538 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-31 12:09:03,665 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:09:03,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1046 places, 1048 transitions, 2821 flow [2023-08-31 12:09:05,070 INFO L130 PetriNetUnfolder]: 128/2521 cut-off events. [2023-08-31 12:09:05,071 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 12:09:05,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2922 conditions, 2521 events. 128/2521 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 12442 event pairs, 0 based on Foata normal form. 0/1755 useless extension candidates. Maximal degree in co-relation 2785. Up to 52 conditions per place. [2023-08-31 12:09:05,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 1046 places, 1048 transitions, 2821 flow [2023-08-31 12:09:05,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1046 places, 1048 transitions, 2821 flow [2023-08-31 12:09:05,347 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:09:05,347 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1046 places, 1048 transitions, 2821 flow [2023-08-31 12:09:05,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1046 places, 1048 transitions, 2821 flow [2023-08-31 12:09:05,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1046 places, 1048 transitions, 2821 flow [2023-08-31 12:09:06,765 INFO L130 PetriNetUnfolder]: 128/2521 cut-off events. [2023-08-31 12:09:06,766 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 12:09:06,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2922 conditions, 2521 events. 128/2521 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 12442 event pairs, 0 based on Foata normal form. 0/1755 useless extension candidates. Maximal degree in co-relation 2785. Up to 52 conditions per place. [2023-08-31 12:09:07,493 INFO L119 LiptonReduction]: Number of co-enabled transitions 1003200 [2023-08-31 12:09:12,889 INFO L134 LiptonReduction]: Checked pairs total: 5365068 [2023-08-31 12:09:12,889 INFO L136 LiptonReduction]: Total number of compositions: 356 [2023-08-31 12:09:12,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:09:12,891 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:09:12,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:09:13,430 INFO L130 PetriNetUnfolder]: 91/1511 cut-off events. [2023-08-31 12:09:13,431 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 12:09:13,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:09:13,431 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:09:13,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:09:13,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:09:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1126320584, now seen corresponding path program 1 times [2023-08-31 12:09:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:09:13,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68044090] [2023-08-31 12:09:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:09:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:09:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:13,483 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:09:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:13,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:09:13,533 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:09:13,533 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:09:13,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 12:09:13,533 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:09:13,534 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:09:13,534 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:09:13,534 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-31 12:09:13,680 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:09:13,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1085 places, 1087 transitions, 2954 flow [2023-08-31 12:09:15,368 INFO L130 PetriNetUnfolder]: 133/2619 cut-off events. [2023-08-31 12:09:15,369 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 12:09:15,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 2619 events. 133/2619 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 12921 event pairs, 0 based on Foata normal form. 0/1823 useless extension candidates. Maximal degree in co-relation 2911. Up to 54 conditions per place. [2023-08-31 12:09:15,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 1085 places, 1087 transitions, 2954 flow [2023-08-31 12:09:15,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1085 places, 1087 transitions, 2954 flow [2023-08-31 12:09:15,517 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:09:15,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1085 places, 1087 transitions, 2954 flow [2023-08-31 12:09:15,517 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1085 places, 1087 transitions, 2954 flow [2023-08-31 12:09:15,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1085 places, 1087 transitions, 2954 flow [2023-08-31 12:09:16,943 INFO L130 PetriNetUnfolder]: 133/2619 cut-off events. [2023-08-31 12:09:16,944 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 12:09:17,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 2619 events. 133/2619 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 12921 event pairs, 0 based on Foata normal form. 0/1823 useless extension candidates. Maximal degree in co-relation 2911. Up to 54 conditions per place. [2023-08-31 12:09:17,776 INFO L119 LiptonReduction]: Number of co-enabled transitions 1081860 [2023-08-31 12:09:21,836 INFO L134 LiptonReduction]: Checked pairs total: 4845990 [2023-08-31 12:09:21,836 INFO L136 LiptonReduction]: Total number of compositions: 365 [2023-08-31 12:09:21,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:09:21,838 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:09:21,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:09:22,417 INFO L130 PetriNetUnfolder]: 98/1575 cut-off events. [2023-08-31 12:09:22,418 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 12:09:22,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:09:22,418 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:09:22,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:09:22,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:09:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1892002903, now seen corresponding path program 1 times [2023-08-31 12:09:22,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:09:22,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252554651] [2023-08-31 12:09:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:09:22,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:09:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:22,471 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:09:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:22,523 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:09:22,525 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:09:22,525 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:09:22,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 12:09:22,525 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:09:22,526 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:09:22,526 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:09:22,526 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-08-31 12:09:22,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:09:22,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1124 places, 1126 transitions, 3089 flow [2023-08-31 12:09:24,327 INFO L130 PetriNetUnfolder]: 138/2717 cut-off events. [2023-08-31 12:09:24,328 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 12:09:24,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 2717 events. 138/2717 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13430 event pairs, 0 based on Foata normal form. 0/1891 useless extension candidates. Maximal degree in co-relation 3038. Up to 56 conditions per place. [2023-08-31 12:09:24,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 1124 places, 1126 transitions, 3089 flow [2023-08-31 12:09:24,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1124 places, 1126 transitions, 3089 flow [2023-08-31 12:09:24,865 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:09:24,865 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1124 places, 1126 transitions, 3089 flow [2023-08-31 12:09:24,866 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1124 places, 1126 transitions, 3089 flow [2023-08-31 12:09:24,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1124 places, 1126 transitions, 3089 flow [2023-08-31 12:09:26,714 INFO L130 PetriNetUnfolder]: 138/2717 cut-off events. [2023-08-31 12:09:26,714 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 12:09:26,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 2717 events. 138/2717 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13430 event pairs, 0 based on Foata normal form. 0/1891 useless extension candidates. Maximal degree in co-relation 3038. Up to 56 conditions per place. [2023-08-31 12:09:27,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 1163484 [2023-08-31 12:09:33,505 INFO L134 LiptonReduction]: Checked pairs total: 6265475 [2023-08-31 12:09:33,506 INFO L136 LiptonReduction]: Total number of compositions: 380 [2023-08-31 12:09:33,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:09:33,507 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:09:33,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:09:34,257 INFO L130 PetriNetUnfolder]: 101/1635 cut-off events. [2023-08-31 12:09:34,258 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 12:09:34,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:09:34,258 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:09:34,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:09:34,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:09:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash 443851425, now seen corresponding path program 1 times [2023-08-31 12:09:34,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:09:34,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836125350] [2023-08-31 12:09:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:09:34,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:09:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:34,313 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:09:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:34,360 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:09:34,360 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:09:34,360 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:09:34,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 12:09:34,361 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:09:34,361 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:09:34,361 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:09:34,361 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-08-31 12:09:34,534 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:09:34,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1163 places, 1165 transitions, 3226 flow [2023-08-31 12:09:36,250 INFO L130 PetriNetUnfolder]: 143/2815 cut-off events. [2023-08-31 12:09:36,250 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 12:09:36,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3306 conditions, 2815 events. 143/2815 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13858 event pairs, 0 based on Foata normal form. 0/1959 useless extension candidates. Maximal degree in co-relation 3166. Up to 58 conditions per place. [2023-08-31 12:09:36,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 1163 places, 1165 transitions, 3226 flow [2023-08-31 12:09:36,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1163 places, 1165 transitions, 3226 flow [2023-08-31 12:09:36,527 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:09:36,527 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1163 places, 1165 transitions, 3226 flow [2023-08-31 12:09:36,527 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1163 places, 1165 transitions, 3226 flow [2023-08-31 12:09:36,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1163 places, 1165 transitions, 3226 flow [2023-08-31 12:09:38,058 INFO L130 PetriNetUnfolder]: 143/2815 cut-off events. [2023-08-31 12:09:38,058 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 12:09:38,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3306 conditions, 2815 events. 143/2815 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13858 event pairs, 0 based on Foata normal form. 0/1959 useless extension candidates. Maximal degree in co-relation 3166. Up to 58 conditions per place. [2023-08-31 12:09:38,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 1248072 [2023-08-31 12:09:43,903 INFO L134 LiptonReduction]: Checked pairs total: 5536934 [2023-08-31 12:09:43,903 INFO L136 LiptonReduction]: Total number of compositions: 398 [2023-08-31 12:09:43,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:09:43,905 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:09:43,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:09:44,578 INFO L130 PetriNetUnfolder]: 104/1701 cut-off events. [2023-08-31 12:09:44,579 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 12:09:44,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:09:44,579 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:09:44,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:09:44,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:09:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash -341431631, now seen corresponding path program 1 times [2023-08-31 12:09:44,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:09:44,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933599698] [2023-08-31 12:09:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:09:44,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:09:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:44,662 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:09:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:44,711 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:09:44,711 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:09:44,712 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:09:44,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 12:09:44,712 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:09:44,713 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:09:44,713 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:09:44,713 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-08-31 12:09:44,863 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:09:44,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1202 places, 1204 transitions, 3365 flow [2023-08-31 12:09:46,819 INFO L130 PetriNetUnfolder]: 148/2913 cut-off events. [2023-08-31 12:09:46,820 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 12:09:47,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3436 conditions, 2913 events. 148/2913 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14509 event pairs, 0 based on Foata normal form. 0/2027 useless extension candidates. Maximal degree in co-relation 3295. Up to 60 conditions per place. [2023-08-31 12:09:47,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 1202 places, 1204 transitions, 3365 flow [2023-08-31 12:09:47,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1202 places, 1204 transitions, 3365 flow [2023-08-31 12:09:47,044 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:09:47,044 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1202 places, 1204 transitions, 3365 flow [2023-08-31 12:09:47,044 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1202 places, 1204 transitions, 3365 flow [2023-08-31 12:09:47,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1202 places, 1204 transitions, 3365 flow [2023-08-31 12:09:48,844 INFO L130 PetriNetUnfolder]: 148/2913 cut-off events. [2023-08-31 12:09:48,845 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 12:09:49,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3436 conditions, 2913 events. 148/2913 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14509 event pairs, 0 based on Foata normal form. 0/2027 useless extension candidates. Maximal degree in co-relation 3295. Up to 60 conditions per place. [2023-08-31 12:09:49,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 1335624 [2023-08-31 12:09:54,579 INFO L134 LiptonReduction]: Checked pairs total: 5977045 [2023-08-31 12:09:54,579 INFO L136 LiptonReduction]: Total number of compositions: 399 [2023-08-31 12:09:54,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:09:54,581 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:09:54,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:09:55,207 INFO L130 PetriNetUnfolder]: 110/1763 cut-off events. [2023-08-31 12:09:55,207 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 12:09:55,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:09:55,208 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:09:55,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:09:55,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:09:55,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2077336935, now seen corresponding path program 1 times [2023-08-31 12:09:55,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:09:55,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030675222] [2023-08-31 12:09:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:09:55,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:09:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:55,264 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:09:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:09:55,320 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:09:55,321 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:09:55,321 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:09:55,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-31 12:09:55,322 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:09:55,322 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:09:55,322 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:09:55,322 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-08-31 12:09:55,476 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:09:55,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1241 places, 1243 transitions, 3506 flow [2023-08-31 12:09:57,441 INFO L130 PetriNetUnfolder]: 153/3011 cut-off events. [2023-08-31 12:09:57,441 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 12:09:57,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3567 conditions, 3011 events. 153/3011 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14994 event pairs, 0 based on Foata normal form. 0/2095 useless extension candidates. Maximal degree in co-relation 3425. Up to 62 conditions per place. [2023-08-31 12:09:57,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 1241 places, 1243 transitions, 3506 flow [2023-08-31 12:09:57,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1241 places, 1243 transitions, 3506 flow [2023-08-31 12:09:57,830 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:09:57,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1241 places, 1243 transitions, 3506 flow [2023-08-31 12:09:57,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1241 places, 1243 transitions, 3506 flow [2023-08-31 12:09:57,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1241 places, 1243 transitions, 3506 flow [2023-08-31 12:09:59,757 INFO L130 PetriNetUnfolder]: 153/3011 cut-off events. [2023-08-31 12:09:59,757 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 12:10:00,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3567 conditions, 3011 events. 153/3011 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14994 event pairs, 0 based on Foata normal form. 0/2095 useless extension candidates. Maximal degree in co-relation 3425. Up to 62 conditions per place. [2023-08-31 12:10:00,707 INFO L119 LiptonReduction]: Number of co-enabled transitions 1426140 [2023-08-31 12:10:06,183 INFO L134 LiptonReduction]: Checked pairs total: 7765389 [2023-08-31 12:10:06,183 INFO L136 LiptonReduction]: Total number of compositions: 423 [2023-08-31 12:10:06,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:10:06,185 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:10:06,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:10:06,795 INFO L130 PetriNetUnfolder]: 114/1827 cut-off events. [2023-08-31 12:10:06,795 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 12:10:06,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:10:06,796 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:10:06,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:10:06,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:10:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash 217647664, now seen corresponding path program 1 times [2023-08-31 12:10:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:10:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476273357] [2023-08-31 12:10:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:10:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:10:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:06,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:10:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:06,910 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:10:06,910 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:10:06,910 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:10:06,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-31 12:10:06,911 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:10:06,911 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:10:06,911 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:10:06,912 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-08-31 12:10:07,065 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:10:07,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1280 places, 1282 transitions, 3649 flow [2023-08-31 12:10:08,902 INFO L130 PetriNetUnfolder]: 158/3109 cut-off events. [2023-08-31 12:10:08,902 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 12:10:09,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3699 conditions, 3109 events. 158/3109 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15466 event pairs, 0 based on Foata normal form. 0/2163 useless extension candidates. Maximal degree in co-relation 3556. Up to 64 conditions per place. [2023-08-31 12:10:09,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 1280 places, 1282 transitions, 3649 flow [2023-08-31 12:10:09,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1280 places, 1282 transitions, 3649 flow [2023-08-31 12:10:09,244 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:10:09,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1280 places, 1282 transitions, 3649 flow [2023-08-31 12:10:09,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1280 places, 1282 transitions, 3649 flow [2023-08-31 12:10:09,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1280 places, 1282 transitions, 3649 flow [2023-08-31 12:10:10,931 INFO L130 PetriNetUnfolder]: 158/3109 cut-off events. [2023-08-31 12:10:10,932 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 12:10:11,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3699 conditions, 3109 events. 158/3109 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15466 event pairs, 0 based on Foata normal form. 0/2163 useless extension candidates. Maximal degree in co-relation 3556. Up to 64 conditions per place. [2023-08-31 12:10:11,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 1519620 [2023-08-31 12:10:18,258 INFO L134 LiptonReduction]: Checked pairs total: 8134421 [2023-08-31 12:10:18,259 INFO L136 LiptonReduction]: Total number of compositions: 439 [2023-08-31 12:10:18,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:10:18,261 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:10:18,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:10:19,119 INFO L130 PetriNetUnfolder]: 114/1886 cut-off events. [2023-08-31 12:10:19,119 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 12:10:19,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:10:19,120 INFO L208 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:10:19,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:10:19,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:10:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash -52940128, now seen corresponding path program 1 times [2023-08-31 12:10:19,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:10:19,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184764433] [2023-08-31 12:10:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:10:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:10:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:19,208 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:10:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:19,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:10:19,277 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:10:19,277 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:10:19,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-31 12:10:19,278 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:10:19,278 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:10:19,278 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:10:19,278 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-08-31 12:10:19,472 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:10:19,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1319 places, 1321 transitions, 3794 flow [2023-08-31 12:10:21,513 INFO L130 PetriNetUnfolder]: 163/3207 cut-off events. [2023-08-31 12:10:21,513 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 12:10:21,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3832 conditions, 3207 events. 163/3207 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15920 event pairs, 0 based on Foata normal form. 0/2231 useless extension candidates. Maximal degree in co-relation 3688. Up to 66 conditions per place. [2023-08-31 12:10:21,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 1319 places, 1321 transitions, 3794 flow [2023-08-31 12:10:21,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1319 places, 1321 transitions, 3794 flow [2023-08-31 12:10:21,677 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:10:21,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1319 places, 1321 transitions, 3794 flow [2023-08-31 12:10:21,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1319 places, 1321 transitions, 3794 flow [2023-08-31 12:10:21,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1319 places, 1321 transitions, 3794 flow [2023-08-31 12:10:23,613 INFO L130 PetriNetUnfolder]: 163/3207 cut-off events. [2023-08-31 12:10:23,614 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 12:10:23,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3832 conditions, 3207 events. 163/3207 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15920 event pairs, 0 based on Foata normal form. 0/2231 useless extension candidates. Maximal degree in co-relation 3688. Up to 66 conditions per place. [2023-08-31 12:10:24,528 INFO L119 LiptonReduction]: Number of co-enabled transitions 1616064 [2023-08-31 12:10:31,268 INFO L134 LiptonReduction]: Checked pairs total: 7294978 [2023-08-31 12:10:31,268 INFO L136 LiptonReduction]: Total number of compositions: 443 [2023-08-31 12:10:31,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:10:31,270 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:10:31,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:10:32,212 INFO L130 PetriNetUnfolder]: 121/1955 cut-off events. [2023-08-31 12:10:32,212 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 12:10:32,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:10:32,213 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:10:32,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:10:32,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:10:32,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1405520572, now seen corresponding path program 1 times [2023-08-31 12:10:32,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:10:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579086726] [2023-08-31 12:10:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:10:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:10:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:32,274 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:10:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:32,350 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:10:32,350 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:10:32,350 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:10:32,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-31 12:10:32,351 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:10:32,351 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:10:32,351 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:10:32,351 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-08-31 12:10:32,521 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:10:32,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1358 places, 1360 transitions, 3941 flow [2023-08-31 12:10:34,804 INFO L130 PetriNetUnfolder]: 168/3305 cut-off events. [2023-08-31 12:10:34,805 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 12:10:34,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 3305 events. 168/3305 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 16417 event pairs, 0 based on Foata normal form. 0/2299 useless extension candidates. Maximal degree in co-relation 3821. Up to 68 conditions per place. [2023-08-31 12:10:34,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 1358 places, 1360 transitions, 3941 flow [2023-08-31 12:10:34,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1358 places, 1360 transitions, 3941 flow [2023-08-31 12:10:34,980 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:10:34,981 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1358 places, 1360 transitions, 3941 flow [2023-08-31 12:10:34,981 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1358 places, 1360 transitions, 3941 flow [2023-08-31 12:10:34,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1358 places, 1360 transitions, 3941 flow [2023-08-31 12:10:36,942 INFO L130 PetriNetUnfolder]: 168/3305 cut-off events. [2023-08-31 12:10:36,943 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 12:10:37,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 3305 events. 168/3305 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 16417 event pairs, 0 based on Foata normal form. 0/2299 useless extension candidates. Maximal degree in co-relation 3821. Up to 68 conditions per place. [2023-08-31 12:10:37,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 1715472 [2023-08-31 12:10:44,098 INFO L134 LiptonReduction]: Checked pairs total: 9303697 [2023-08-31 12:10:44,098 INFO L136 LiptonReduction]: Total number of compositions: 455 [2023-08-31 12:10:44,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:10:44,099 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:10:44,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:10:44,862 INFO L130 PetriNetUnfolder]: 126/2016 cut-off events. [2023-08-31 12:10:44,862 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 12:10:44,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:10:44,863 INFO L208 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:10:44,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:10:44,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:10:44,863 INFO L85 PathProgramCache]: Analyzing trace with hash 305929028, now seen corresponding path program 1 times [2023-08-31 12:10:44,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:10:44,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712737693] [2023-08-31 12:10:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:10:44,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:10:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:44,916 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:10:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:44,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:10:44,984 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:10:44,984 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:10:44,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-31 12:10:44,985 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:10:44,985 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:10:44,985 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:10:44,985 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-08-31 12:10:45,129 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:10:45,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1397 places, 1399 transitions, 4090 flow [2023-08-31 12:10:47,315 INFO L130 PetriNetUnfolder]: 173/3403 cut-off events. [2023-08-31 12:10:47,315 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 12:10:47,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4101 conditions, 3403 events. 173/3403 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 16940 event pairs, 0 based on Foata normal form. 0/2367 useless extension candidates. Maximal degree in co-relation 3955. Up to 70 conditions per place. [2023-08-31 12:10:47,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 1397 places, 1399 transitions, 4090 flow [2023-08-31 12:10:47,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1397 places, 1399 transitions, 4090 flow [2023-08-31 12:10:47,581 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:10:47,581 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1397 places, 1399 transitions, 4090 flow [2023-08-31 12:10:47,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1397 places, 1399 transitions, 4090 flow [2023-08-31 12:10:47,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1397 places, 1399 transitions, 4090 flow [2023-08-31 12:10:50,125 INFO L130 PetriNetUnfolder]: 173/3403 cut-off events. [2023-08-31 12:10:50,126 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 12:10:50,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4101 conditions, 3403 events. 173/3403 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 16940 event pairs, 0 based on Foata normal form. 0/2367 useless extension candidates. Maximal degree in co-relation 3955. Up to 70 conditions per place. [2023-08-31 12:10:51,152 INFO L119 LiptonReduction]: Number of co-enabled transitions 1817844 [2023-08-31 12:10:56,533 INFO L134 LiptonReduction]: Checked pairs total: 7988386 [2023-08-31 12:10:56,534 INFO L136 LiptonReduction]: Total number of compositions: 462 [2023-08-31 12:10:56,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:10:56,535 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:10:56,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:10:57,324 INFO L130 PetriNetUnfolder]: 123/2070 cut-off events. [2023-08-31 12:10:57,324 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 12:10:57,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:10:57,325 INFO L208 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:10:57,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:10:57,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:10:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1564126010, now seen corresponding path program 1 times [2023-08-31 12:10:57,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:10:57,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874092781] [2023-08-31 12:10:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:10:57,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:10:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:57,385 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:10:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:57,445 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:10:57,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:10:57,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:10:57,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-31 12:10:57,446 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:10:57,446 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:10:57,447 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:10:57,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-08-31 12:10:57,624 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:10:57,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1436 places, 1438 transitions, 4241 flow [2023-08-31 12:10:59,833 INFO L130 PetriNetUnfolder]: 178/3501 cut-off events. [2023-08-31 12:10:59,833 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 12:11:00,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4237 conditions, 3501 events. 178/3501 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 17438 event pairs, 0 based on Foata normal form. 0/2435 useless extension candidates. Maximal degree in co-relation 4090. Up to 72 conditions per place. [2023-08-31 12:11:00,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 1436 places, 1438 transitions, 4241 flow [2023-08-31 12:11:00,039 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1436 places, 1438 transitions, 4241 flow [2023-08-31 12:11:00,039 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:11:00,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1436 places, 1438 transitions, 4241 flow [2023-08-31 12:11:00,039 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1436 places, 1438 transitions, 4241 flow [2023-08-31 12:11:00,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1436 places, 1438 transitions, 4241 flow [2023-08-31 12:11:02,170 INFO L130 PetriNetUnfolder]: 178/3501 cut-off events. [2023-08-31 12:11:02,171 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 12:11:02,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4237 conditions, 3501 events. 178/3501 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 17438 event pairs, 0 based on Foata normal form. 0/2435 useless extension candidates. Maximal degree in co-relation 4090. Up to 72 conditions per place. [2023-08-31 12:11:03,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 1923180 [2023-08-31 12:11:09,016 INFO L134 LiptonReduction]: Checked pairs total: 8703236 [2023-08-31 12:11:09,016 INFO L136 LiptonReduction]: Total number of compositions: 492 [2023-08-31 12:11:09,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:11:09,018 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:11:09,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:11:09,840 INFO L130 PetriNetUnfolder]: 135/2144 cut-off events. [2023-08-31 12:11:09,840 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 12:11:09,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:11:09,841 INFO L208 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:11:09,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:11:09,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:11:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash -838724349, now seen corresponding path program 1 times [2023-08-31 12:11:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:11:09,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375850918] [2023-08-31 12:11:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:11:09,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:11:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:09,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:11:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:09,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:11:09,958 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:11:09,958 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:11:09,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-31 12:11:09,959 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:11:09,959 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:11:09,959 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:11:09,959 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-08-31 12:11:10,115 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:11:10,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1475 places, 1477 transitions, 4394 flow [2023-08-31 12:11:12,345 INFO L130 PetriNetUnfolder]: 183/3599 cut-off events. [2023-08-31 12:11:12,346 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 12:11:12,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 3599 events. 183/3599 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 17941 event pairs, 0 based on Foata normal form. 0/2503 useless extension candidates. Maximal degree in co-relation 4226. Up to 74 conditions per place. [2023-08-31 12:11:12,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 1475 places, 1477 transitions, 4394 flow [2023-08-31 12:11:12,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1475 places, 1477 transitions, 4394 flow [2023-08-31 12:11:12,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:11:12,595 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1475 places, 1477 transitions, 4394 flow [2023-08-31 12:11:12,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1475 places, 1477 transitions, 4394 flow [2023-08-31 12:11:12,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1475 places, 1477 transitions, 4394 flow [2023-08-31 12:11:14,963 INFO L130 PetriNetUnfolder]: 183/3599 cut-off events. [2023-08-31 12:11:14,964 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 12:11:15,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 3599 events. 183/3599 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 17941 event pairs, 0 based on Foata normal form. 0/2503 useless extension candidates. Maximal degree in co-relation 4226. Up to 74 conditions per place. [2023-08-31 12:11:15,926 INFO L119 LiptonReduction]: Number of co-enabled transitions 2031480 [2023-08-31 12:11:21,981 INFO L134 LiptonReduction]: Checked pairs total: 10978048 [2023-08-31 12:11:21,981 INFO L136 LiptonReduction]: Total number of compositions: 499 [2023-08-31 12:11:21,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:11:21,982 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:11:21,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:11:23,030 INFO L130 PetriNetUnfolder]: 132/2198 cut-off events. [2023-08-31 12:11:23,031 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 12:11:23,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:11:23,031 INFO L208 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:11:23,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:11:23,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:11:23,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1548078907, now seen corresponding path program 1 times [2023-08-31 12:11:23,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:11:23,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004497316] [2023-08-31 12:11:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:11:23,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:11:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:23,095 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:11:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:23,156 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:11:23,156 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:11:23,156 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:11:23,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-31 12:11:23,157 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:11:23,157 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:11:23,157 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:11:23,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-08-31 12:11:23,325 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:11:23,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1514 places, 1516 transitions, 4549 flow [2023-08-31 12:11:25,831 INFO L130 PetriNetUnfolder]: 188/3697 cut-off events. [2023-08-31 12:11:25,831 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 12:11:26,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4512 conditions, 3697 events. 188/3697 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 18449 event pairs, 0 based on Foata normal form. 0/2571 useless extension candidates. Maximal degree in co-relation 4363. Up to 76 conditions per place. [2023-08-31 12:11:26,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 1514 places, 1516 transitions, 4549 flow [2023-08-31 12:11:26,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1514 places, 1516 transitions, 4549 flow [2023-08-31 12:11:26,146 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:11:26,146 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1514 places, 1516 transitions, 4549 flow [2023-08-31 12:11:26,147 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1514 places, 1516 transitions, 4549 flow [2023-08-31 12:11:26,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1514 places, 1516 transitions, 4549 flow [2023-08-31 12:11:28,725 INFO L130 PetriNetUnfolder]: 188/3697 cut-off events. [2023-08-31 12:11:28,725 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 12:11:28,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4512 conditions, 3697 events. 188/3697 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 18449 event pairs, 0 based on Foata normal form. 0/2571 useless extension candidates. Maximal degree in co-relation 4363. Up to 76 conditions per place. [2023-08-31 12:11:29,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 2142744 [2023-08-31 12:11:35,956 INFO L134 LiptonReduction]: Checked pairs total: 11626358 [2023-08-31 12:11:35,956 INFO L136 LiptonReduction]: Total number of compositions: 497 [2023-08-31 12:11:35,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:11:35,958 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:11:35,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:11:37,103 INFO L130 PetriNetUnfolder]: 140/2268 cut-off events. [2023-08-31 12:11:37,104 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 12:11:37,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:11:37,104 INFO L208 CegarLoopForPetriNet]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:11:37,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:11:37,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:11:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1300396658, now seen corresponding path program 1 times [2023-08-31 12:11:37,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:11:37,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172124420] [2023-08-31 12:11:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:11:37,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:11:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:37,176 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:11:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:37,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:11:37,280 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:11:37,280 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:11:37,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-31 12:11:37,281 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:11:37,281 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:11:37,281 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:11:37,282 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-08-31 12:11:37,487 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:11:37,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1553 places, 1555 transitions, 4706 flow [2023-08-31 12:11:40,118 INFO L130 PetriNetUnfolder]: 193/3795 cut-off events. [2023-08-31 12:11:40,118 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 12:11:40,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4651 conditions, 3795 events. 193/3795 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 18938 event pairs, 0 based on Foata normal form. 0/2639 useless extension candidates. Maximal degree in co-relation 4501. Up to 78 conditions per place. [2023-08-31 12:11:40,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 1553 places, 1555 transitions, 4706 flow [2023-08-31 12:11:40,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1553 places, 1555 transitions, 4706 flow [2023-08-31 12:11:40,386 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:11:40,386 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1553 places, 1555 transitions, 4706 flow [2023-08-31 12:11:40,387 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1553 places, 1555 transitions, 4706 flow [2023-08-31 12:11:40,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1553 places, 1555 transitions, 4706 flow [2023-08-31 12:11:42,967 INFO L130 PetriNetUnfolder]: 193/3795 cut-off events. [2023-08-31 12:11:42,967 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 12:11:43,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4651 conditions, 3795 events. 193/3795 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 18938 event pairs, 0 based on Foata normal form. 0/2639 useless extension candidates. Maximal degree in co-relation 4501. Up to 78 conditions per place. [2023-08-31 12:11:44,151 INFO L119 LiptonReduction]: Number of co-enabled transitions 2256972 [2023-08-31 12:11:50,149 INFO L134 LiptonReduction]: Checked pairs total: 10261087 [2023-08-31 12:11:50,149 INFO L136 LiptonReduction]: Total number of compositions: 502 [2023-08-31 12:11:50,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:11:50,150 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:11:50,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:11:51,236 INFO L130 PetriNetUnfolder]: 141/2321 cut-off events. [2023-08-31 12:11:51,236 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 12:11:51,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:11:51,236 INFO L208 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:11:51,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:11:51,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:11:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash -469823685, now seen corresponding path program 1 times [2023-08-31 12:11:51,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:11:51,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456039445] [2023-08-31 12:11:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:11:51,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:11:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:51,308 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:11:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:51,383 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:11:51,383 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:11:51,384 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:11:51,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-31 12:11:51,384 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:11:51,384 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:11:51,384 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:11:51,384 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-08-31 12:11:51,550 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:11:51,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1592 places, 1594 transitions, 4865 flow [2023-08-31 12:11:54,384 INFO L130 PetriNetUnfolder]: 198/3893 cut-off events. [2023-08-31 12:11:54,384 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 12:11:54,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4791 conditions, 3893 events. 198/3893 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 19527 event pairs, 0 based on Foata normal form. 0/2707 useless extension candidates. Maximal degree in co-relation 4640. Up to 80 conditions per place. [2023-08-31 12:11:54,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 1592 places, 1594 transitions, 4865 flow [2023-08-31 12:11:54,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1592 places, 1594 transitions, 4865 flow [2023-08-31 12:11:54,719 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:11:54,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1592 places, 1594 transitions, 4865 flow [2023-08-31 12:11:54,720 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1592 places, 1594 transitions, 4865 flow [2023-08-31 12:11:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1592 places, 1594 transitions, 4865 flow [2023-08-31 12:11:57,573 INFO L130 PetriNetUnfolder]: 198/3893 cut-off events. [2023-08-31 12:11:57,573 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 12:11:57,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4791 conditions, 3893 events. 198/3893 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 19527 event pairs, 0 based on Foata normal form. 0/2707 useless extension candidates. Maximal degree in co-relation 4640. Up to 80 conditions per place. [2023-08-31 12:11:58,762 INFO L119 LiptonReduction]: Number of co-enabled transitions 2374164 [2023-08-31 12:12:05,231 INFO L134 LiptonReduction]: Checked pairs total: 10814435 [2023-08-31 12:12:05,231 INFO L136 LiptonReduction]: Total number of compositions: 544 [2023-08-31 12:12:05,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:12:05,233 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:12:05,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:12:07,117 INFO L130 PetriNetUnfolder]: 151/2396 cut-off events. [2023-08-31 12:12:07,118 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 12:12:07,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:12:07,119 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:12:07,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:12:07,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:12:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash 301149531, now seen corresponding path program 1 times [2023-08-31 12:12:07,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:12:07,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160472703] [2023-08-31 12:12:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:12:07,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:12:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:12:07,244 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:12:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:12:07,419 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:12:07,420 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:12:07,420 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:12:07,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-31 12:12:07,420 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:12:07,421 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:12:07,421 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:12:07,421 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2023-08-31 12:12:07,744 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:12:07,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1631 places, 1633 transitions, 5026 flow [2023-08-31 12:12:10,621 INFO L130 PetriNetUnfolder]: 203/3991 cut-off events. [2023-08-31 12:12:10,622 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-08-31 12:12:10,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4932 conditions, 3991 events. 203/3991 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 19852 event pairs, 0 based on Foata normal form. 0/2775 useless extension candidates. Maximal degree in co-relation 4780. Up to 82 conditions per place. [2023-08-31 12:12:10,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 1631 places, 1633 transitions, 5026 flow [2023-08-31 12:12:10,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1631 places, 1633 transitions, 5026 flow [2023-08-31 12:12:10,972 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:12:10,972 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1631 places, 1633 transitions, 5026 flow [2023-08-31 12:12:10,972 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1631 places, 1633 transitions, 5026 flow [2023-08-31 12:12:10,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1631 places, 1633 transitions, 5026 flow [2023-08-31 12:12:13,890 INFO L130 PetriNetUnfolder]: 203/3991 cut-off events. [2023-08-31 12:12:13,891 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-08-31 12:12:14,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4932 conditions, 3991 events. 203/3991 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 19852 event pairs, 0 based on Foata normal form. 0/2775 useless extension candidates. Maximal degree in co-relation 4780. Up to 82 conditions per place. [2023-08-31 12:12:15,224 INFO L119 LiptonReduction]: Number of co-enabled transitions 2494320 [2023-08-31 12:12:21,886 INFO L134 LiptonReduction]: Checked pairs total: 13572500 [2023-08-31 12:12:21,887 INFO L136 LiptonReduction]: Total number of compositions: 549 [2023-08-31 12:12:21,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:12:21,888 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:12:21,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:12:23,176 INFO L130 PetriNetUnfolder]: 152/2458 cut-off events. [2023-08-31 12:12:23,177 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-08-31 12:12:23,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:12:23,177 INFO L208 CegarLoopForPetriNet]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:12:23,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:12:23,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:12:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1206239277, now seen corresponding path program 1 times [2023-08-31 12:12:23,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:12:23,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208383375] [2023-08-31 12:12:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:12:23,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:12:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:12:23,253 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:12:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:12:23,330 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:12:23,330 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:12:23,331 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:12:23,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-31 12:12:23,331 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:12:23,331 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:12:23,331 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:12:23,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2023-08-31 12:12:23,543 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:12:23,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1670 places, 1672 transitions, 5189 flow [2023-08-31 12:12:26,588 INFO L130 PetriNetUnfolder]: 208/4089 cut-off events. [2023-08-31 12:12:26,588 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-08-31 12:12:26,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5074 conditions, 4089 events. 208/4089 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 20380 event pairs, 0 based on Foata normal form. 0/2843 useless extension candidates. Maximal degree in co-relation 4921. Up to 84 conditions per place. [2023-08-31 12:12:26,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 1670 places, 1672 transitions, 5189 flow [2023-08-31 12:12:26,917 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1670 places, 1672 transitions, 5189 flow [2023-08-31 12:12:26,918 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:12:26,918 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1670 places, 1672 transitions, 5189 flow [2023-08-31 12:12:26,918 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1670 places, 1672 transitions, 5189 flow [2023-08-31 12:12:26,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1670 places, 1672 transitions, 5189 flow [2023-08-31 12:12:29,857 INFO L130 PetriNetUnfolder]: 208/4089 cut-off events. [2023-08-31 12:12:29,858 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-08-31 12:12:30,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5074 conditions, 4089 events. 208/4089 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 20380 event pairs, 0 based on Foata normal form. 0/2843 useless extension candidates. Maximal degree in co-relation 4921. Up to 84 conditions per place. [2023-08-31 12:12:31,253 INFO L119 LiptonReduction]: Number of co-enabled transitions 2617440 [2023-08-31 12:12:37,866 INFO L134 LiptonReduction]: Checked pairs total: 14100807 [2023-08-31 12:12:37,866 INFO L136 LiptonReduction]: Total number of compositions: 554 [2023-08-31 12:12:37,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:12:37,868 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:12:37,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:12:39,207 INFO L130 PetriNetUnfolder]: 153/2515 cut-off events. [2023-08-31 12:12:39,207 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-08-31 12:12:39,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:12:39,207 INFO L208 CegarLoopForPetriNet]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:12:39,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:12:39,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:12:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash 450130283, now seen corresponding path program 1 times [2023-08-31 12:12:39,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:12:39,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882984731] [2023-08-31 12:12:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:12:39,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:12:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:12:39,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:12:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:12:39,344 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:12:39,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:12:39,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:12:39,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-31 12:12:39,345 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:12:39,346 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:12:39,346 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:12:39,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2023-08-31 12:12:39,521 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:12:39,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1709 places, 1711 transitions, 5354 flow [2023-08-31 12:12:42,571 INFO L130 PetriNetUnfolder]: 213/4187 cut-off events. [2023-08-31 12:12:42,571 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-08-31 12:12:42,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5217 conditions, 4187 events. 213/4187 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 20911 event pairs, 0 based on Foata normal form. 0/2911 useless extension candidates. Maximal degree in co-relation 5063. Up to 86 conditions per place. [2023-08-31 12:12:42,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 1709 places, 1711 transitions, 5354 flow [2023-08-31 12:12:42,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1709 places, 1711 transitions, 5354 flow [2023-08-31 12:12:42,942 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:12:42,942 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1709 places, 1711 transitions, 5354 flow [2023-08-31 12:12:42,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1709 places, 1711 transitions, 5354 flow [2023-08-31 12:12:42,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1709 places, 1711 transitions, 5354 flow [2023-08-31 12:12:46,300 INFO L130 PetriNetUnfolder]: 213/4187 cut-off events. [2023-08-31 12:12:46,300 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-08-31 12:12:46,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5217 conditions, 4187 events. 213/4187 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 20911 event pairs, 0 based on Foata normal form. 0/2911 useless extension candidates. Maximal degree in co-relation 5063. Up to 86 conditions per place. [2023-08-31 12:12:47,432 INFO L119 LiptonReduction]: Number of co-enabled transitions 2743524 [2023-08-31 12:12:54,516 INFO L134 LiptonReduction]: Checked pairs total: 12323383 [2023-08-31 12:12:54,517 INFO L136 LiptonReduction]: Total number of compositions: 573 [2023-08-31 12:12:54,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:12:54,518 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:12:54,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:12:55,771 INFO L130 PetriNetUnfolder]: 158/2580 cut-off events. [2023-08-31 12:12:55,771 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-08-31 12:12:55,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:12:55,771 INFO L208 CegarLoopForPetriNet]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:12:55,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:12:55,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:12:55,771 INFO L85 PathProgramCache]: Analyzing trace with hash -331244403, now seen corresponding path program 1 times [2023-08-31 12:12:55,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:12:55,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575396948] [2023-08-31 12:12:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:12:55,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:12:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:12:55,849 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:12:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:12:55,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:12:55,928 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:12:55,928 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:12:55,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-31 12:12:55,928 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:12:55,929 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:12:55,929 WARN L233 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:12:55,929 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2023-08-31 12:12:56,118 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:12:56,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1748 places, 1750 transitions, 5521 flow [2023-08-31 12:12:59,650 INFO L130 PetriNetUnfolder]: 218/4285 cut-off events. [2023-08-31 12:12:59,650 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-08-31 12:12:59,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5361 conditions, 4285 events. 218/4285 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 21386 event pairs, 0 based on Foata normal form. 0/2979 useless extension candidates. Maximal degree in co-relation 5206. Up to 88 conditions per place. [2023-08-31 12:12:59,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 1748 places, 1750 transitions, 5521 flow [2023-08-31 12:12:59,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1748 places, 1750 transitions, 5521 flow [2023-08-31 12:12:59,984 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:12:59,984 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1748 places, 1750 transitions, 5521 flow [2023-08-31 12:12:59,985 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1748 places, 1750 transitions, 5521 flow [2023-08-31 12:12:59,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1748 places, 1750 transitions, 5521 flow [2023-08-31 12:13:03,248 INFO L130 PetriNetUnfolder]: 218/4285 cut-off events. [2023-08-31 12:13:03,248 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-08-31 12:13:03,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5361 conditions, 4285 events. 218/4285 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 21386 event pairs, 0 based on Foata normal form. 0/2979 useless extension candidates. Maximal degree in co-relation 5206. Up to 88 conditions per place. [2023-08-31 12:13:04,754 INFO L119 LiptonReduction]: Number of co-enabled transitions 2872572 [2023-08-31 12:13:12,030 INFO L134 LiptonReduction]: Checked pairs total: 15870656 [2023-08-31 12:13:12,030 INFO L136 LiptonReduction]: Total number of compositions: 589 [2023-08-31 12:13:12,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:13:12,031 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:13:12,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:13:13,534 INFO L130 PetriNetUnfolder]: 164/2646 cut-off events. [2023-08-31 12:13:13,534 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-08-31 12:13:13,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:13:13,534 INFO L208 CegarLoopForPetriNet]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:13:13,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:13:13,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:13:13,535 INFO L85 PathProgramCache]: Analyzing trace with hash 376336367, now seen corresponding path program 1 times [2023-08-31 12:13:13,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:13:13,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570490458] [2023-08-31 12:13:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:13:13,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:13:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:13:13,628 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:13:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:13:13,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:13:13,755 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:13:13,755 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:13:13,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-31 12:13:13,756 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:13:13,756 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:13:13,756 WARN L233 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:13:13,756 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2023-08-31 12:13:13,957 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:13:13,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1787 places, 1789 transitions, 5690 flow [2023-08-31 12:13:17,628 INFO L130 PetriNetUnfolder]: 223/4383 cut-off events. [2023-08-31 12:13:17,628 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-08-31 12:13:17,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 4383 events. 223/4383 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 21863 event pairs, 0 based on Foata normal form. 0/3047 useless extension candidates. Maximal degree in co-relation 5350. Up to 90 conditions per place. [2023-08-31 12:13:17,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 1787 places, 1789 transitions, 5690 flow [2023-08-31 12:13:17,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1787 places, 1789 transitions, 5690 flow [2023-08-31 12:13:17,967 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:13:17,967 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1787 places, 1789 transitions, 5690 flow [2023-08-31 12:13:17,967 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1787 places, 1789 transitions, 5690 flow [2023-08-31 12:13:17,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1787 places, 1789 transitions, 5690 flow [2023-08-31 12:13:21,273 INFO L130 PetriNetUnfolder]: 223/4383 cut-off events. [2023-08-31 12:13:21,273 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-08-31 12:13:21,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 4383 events. 223/4383 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 21863 event pairs, 0 based on Foata normal form. 0/3047 useless extension candidates. Maximal degree in co-relation 5350. Up to 90 conditions per place. [2023-08-31 12:13:22,804 INFO L119 LiptonReduction]: Number of co-enabled transitions 3004584 [2023-08-31 12:13:29,684 INFO L134 LiptonReduction]: Checked pairs total: 16264933 [2023-08-31 12:13:29,684 INFO L136 LiptonReduction]: Total number of compositions: 592 [2023-08-31 12:13:29,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:13:29,685 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;@4a11d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:13:29,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:13:31,158 INFO L130 PetriNetUnfolder]: 163/2700 cut-off events. [2023-08-31 12:13:31,158 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-08-31 12:13:31,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:13:31,158 INFO L208 CegarLoopForPetriNet]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:13:31,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:13:31,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:13:31,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1078497348, now seen corresponding path program 1 times [2023-08-31 12:13:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:13:31,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13140456] [2023-08-31 12:13:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:13:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:13:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:13:31,233 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:13:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:13:31,312 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:13:31,312 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:13:31,312 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:13:31,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-31 12:13:31,312 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:13:31,313 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:13:31,313 WARN L233 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:13:31,313 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2023-08-31 12:13:31,497 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:13:31,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1826 places, 1828 transitions, 5861 flow [2023-08-31 12:13:35,292 INFO L130 PetriNetUnfolder]: 228/4481 cut-off events. [2023-08-31 12:13:35,292 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-08-31 12:13:35,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5652 conditions, 4481 events. 228/4481 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 22408 event pairs, 0 based on Foata normal form. 0/3115 useless extension candidates. Maximal degree in co-relation 5495. Up to 92 conditions per place. [2023-08-31 12:13:35,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 1826 places, 1828 transitions, 5861 flow [2023-08-31 12:13:35,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1826 places, 1828 transitions, 5861 flow [2023-08-31 12:13:35,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:13:35,638 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1826 places, 1828 transitions, 5861 flow [2023-08-31 12:13:35,638 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1826 places, 1828 transitions, 5861 flow [2023-08-31 12:13:35,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1826 places, 1828 transitions, 5861 flow