./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:12:58,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:12:58,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:12:58,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:12:58,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:12:58,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:12:58,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:12:58,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:12:58,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:12:58,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:12:58,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:12:58,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:12:58,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:12:58,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:12:58,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:12:58,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:12:58,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:12:58,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:12:58,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:12:58,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:12:58,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:12:58,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:12:58,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:12:58,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:12:58,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:12:58,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:12:58,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:12:58,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:12:58,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:12:58,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:12:58,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:12:58,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:12:58,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:12:58,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:12:58,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:12:58,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:12:58,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:12:58,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:12:58,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:12:58,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:12:58,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:12:58,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:12:58,949 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:12:58,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:12:58,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:12:58,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:12:58,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:12:58,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:12:58,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:12:58,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:12:58,953 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:12:58,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:12:58,954 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:12:58,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:12:58,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:12:58,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:12:58,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:12:58,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:12:58,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:12:58,955 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:12:58,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:12:58,955 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:12:58,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:12:58,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:12:58,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:12:58,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:12:58,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:12:58,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:12:58,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:12:58,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:12:58,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:12:58,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:12:58,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:12:58,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:12:58,958 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:12:58,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:12:58,958 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:12:58,958 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:12:59,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:12:59,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:12:59,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:12:59,270 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:12:59,271 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:12:59,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-31 03:13:00,419 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:13:00,623 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:13:00,623 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-31 03:13:00,628 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9b0b451/e4cad88ab50b471f8679648f36b6594d/FLAG77d484515 [2023-08-31 03:13:00,643 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9b0b451/e4cad88ab50b471f8679648f36b6594d [2023-08-31 03:13:00,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:13:00,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:13:00,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:13:00,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:13:00,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:13:00,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a86585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00, skipping insertion in model container [2023-08-31 03:13:00,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:13:00,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:13:00,815 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-08-31 03:13:00,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:13:00,831 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:13:00,858 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-08-31 03:13:00,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:13:00,872 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:13:00,872 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:13:00,877 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:13:00,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00 WrapperNode [2023-08-31 03:13:00,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:13:00,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:13:00,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:13:00,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:13:00,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,914 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-08-31 03:13:00,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:13:00,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:13:00,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:13:00,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:13:00,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,954 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:13:00,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:13:00,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:13:00,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:13:00,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (1/1) ... [2023-08-31 03:13:00,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:13:00,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:00,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 03:13:01,020 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 03:13:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:13:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:13:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:13:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:13:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:13:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:13:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:13:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:13:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:13:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:13:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:13:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:13:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:13:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:13:01,070 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 03:13:01,217 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:13:01,218 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:13:01,423 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:13:01,462 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:13:01,464 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 03:13:01,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:13:01 BoogieIcfgContainer [2023-08-31 03:13:01,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:13:01,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:13:01,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:13:01,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:13:01,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:13:00" (1/3) ... [2023-08-31 03:13:01,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434be649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:13:01, skipping insertion in model container [2023-08-31 03:13:01,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:13:00" (2/3) ... [2023-08-31 03:13:01,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434be649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:13:01, skipping insertion in model container [2023-08-31 03:13:01,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:13:01" (3/3) ... [2023-08-31 03:13:01,476 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-31 03:13:01,483 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:13:01,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:13:01,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:13:01,491 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:13:01,539 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 03:13:01,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 174 flow [2023-08-31 03:13:01,612 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2023-08-31 03:13:01,616 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:13:01,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 6/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-31 03:13:01,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 79 transitions, 174 flow [2023-08-31 03:13:01,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 69 transitions, 150 flow [2023-08-31 03:13:01,632 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:13:01,641 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 69 transitions, 150 flow [2023-08-31 03:13:01,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 69 transitions, 150 flow [2023-08-31 03:13:01,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 69 transitions, 150 flow [2023-08-31 03:13:01,673 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2023-08-31 03:13:01,673 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:13:01,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 6/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-31 03:13:01,675 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-08-31 03:13:03,607 INFO L134 LiptonReduction]: Checked pairs total: 443 [2023-08-31 03:13:03,607 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-31 03:13:03,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:13:03,633 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;@4a9cce8f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:13:03,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 03:13:03,644 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 03:13:03,644 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:13:03,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:03,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:03,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:03,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash 715998182, now seen corresponding path program 1 times [2023-08-31 03:13:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:03,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848394965] [2023-08-31 03:13:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:04,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848394965] [2023-08-31 03:13:04,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848394965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:04,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:13:04,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:13:04,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101847600] [2023-08-31 03:13:04,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:04,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:13:04,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:13:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:13:04,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 142 [2023-08-31 03:13:04,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:04,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 142 [2023-08-31 03:13:04,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:04,249 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-08-31 03:13:04,250 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 03:13:04,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 240 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-08-31 03:13:04,254 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-31 03:13:04,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-31 03:13:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:13:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:13:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-31 03:13:04,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48063380281690143 [2023-08-31 03:13:04,267 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-31 03:13:04,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-31 03:13:04,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:04,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-31 03:13:04,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,278 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,280 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 273 transitions. [2023-08-31 03:13:04,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-31 03:13:04,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 03:13:04,283 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-31 03:13:04,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-31 03:13:04,288 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-31 03:13:04,288 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-31 03:13:04,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:04,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:04,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:13:04,289 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:04,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:04,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1517791802, now seen corresponding path program 1 times [2023-08-31 03:13:04,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:04,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4866134] [2023-08-31 03:13:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:04,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:04,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4866134] [2023-08-31 03:13:04,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4866134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:04,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:13:04,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:13:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283931619] [2023-08-31 03:13:04,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:04,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:13:04,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:13:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:13:04,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-08-31 03:13:04,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:04,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-08-31 03:13:04,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:04,545 INFO L130 PetriNetUnfolder]: 60/119 cut-off events. [2023-08-31 03:13:04,546 INFO L131 PetriNetUnfolder]: For 22/30 co-relation queries the response was YES. [2023-08-31 03:13:04,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 119 events. 60/119 cut-off events. For 22/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 345 event pairs, 16 based on Foata normal form. 12/102 useless extension candidates. Maximal degree in co-relation 97. Up to 74 conditions per place. [2023-08-31 03:13:04,548 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 26 selfloop transitions, 3 changer transitions 2/32 dead transitions. [2023-08-31 03:13:04,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 155 flow [2023-08-31 03:13:04,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:13:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:13:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 278 transitions. [2023-08-31 03:13:04,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894366197183099 [2023-08-31 03:13:04,554 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 278 transitions. [2023-08-31 03:13:04,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 278 transitions. [2023-08-31 03:13:04,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:04,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 278 transitions. [2023-08-31 03:13:04,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,561 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 278 transitions. [2023-08-31 03:13:04,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 155 flow [2023-08-31 03:13:04,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 32 transitions, 146 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 03:13:04,563 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 64 flow [2023-08-31 03:13:04,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-08-31 03:13:04,564 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-31 03:13:04,564 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 64 flow [2023-08-31 03:13:04,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:04,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:04,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:13:04,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:04,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1749521210, now seen corresponding path program 2 times [2023-08-31 03:13:04,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:04,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129051074] [2023-08-31 03:13:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:04,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:04,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129051074] [2023-08-31 03:13:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129051074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:04,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813960152] [2023-08-31 03:13:04,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:13:04,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:04,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:04,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:04,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:13:04,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 03:13:04,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:04,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:13:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:13:04,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:13:04,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813960152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:04,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:13:04,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-31 03:13:04,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389335278] [2023-08-31 03:13:04,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:04,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:13:04,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:13:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-31 03:13:04,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-08-31 03:13:04,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:04,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-08-31 03:13:04,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:04,895 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-08-31 03:13:04,895 INFO L131 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2023-08-31 03:13:04,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 94 events. 51/94 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 227 event pairs, 24 based on Foata normal form. 16/99 useless extension candidates. Maximal degree in co-relation 148. Up to 73 conditions per place. [2023-08-31 03:13:04,896 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-31 03:13:04,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 123 flow [2023-08-31 03:13:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:13:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:13:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2023-08-31 03:13:04,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735915492957746 [2023-08-31 03:13:04,901 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 269 transitions. [2023-08-31 03:13:04,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 269 transitions. [2023-08-31 03:13:04,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:04,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 269 transitions. [2023-08-31 03:13:04,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,918 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,918 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 64 flow. Second operand 4 states and 269 transitions. [2023-08-31 03:13:04,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 123 flow [2023-08-31 03:13:04,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-31 03:13:04,920 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-08-31 03:13:04,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-31 03:13:04,921 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-31 03:13:04,921 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-08-31 03:13:04,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:04,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:04,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:04,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 03:13:05,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:05,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:05,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1434294769, now seen corresponding path program 1 times [2023-08-31 03:13:05,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:05,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012227933] [2023-08-31 03:13:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:05,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:05,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:05,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012227933] [2023-08-31 03:13:05,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012227933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:05,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583356047] [2023-08-31 03:13:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:05,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:05,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:05,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:05,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:13:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:05,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:13:05,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:05,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:05,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583356047] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:05,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:13:05,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 10 [2023-08-31 03:13:05,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792879092] [2023-08-31 03:13:05,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:05,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:13:05,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:05,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:13:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-08-31 03:13:05,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-08-31 03:13:05,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:05,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:05,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-08-31 03:13:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:05,941 INFO L130 PetriNetUnfolder]: 95/175 cut-off events. [2023-08-31 03:13:05,941 INFO L131 PetriNetUnfolder]: For 50/61 co-relation queries the response was YES. [2023-08-31 03:13:05,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 175 events. 95/175 cut-off events. For 50/61 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 560 event pairs, 15 based on Foata normal form. 12/143 useless extension candidates. Maximal degree in co-relation 144. Up to 69 conditions per place. [2023-08-31 03:13:05,943 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-08-31 03:13:05,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 202 flow [2023-08-31 03:13:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:13:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:13:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 284 transitions. [2023-08-31 03:13:05,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-31 03:13:05,945 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 284 transitions. [2023-08-31 03:13:05,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 284 transitions. [2023-08-31 03:13:05,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:05,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 284 transitions. [2023-08-31 03:13:05,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:05,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:05,948 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:05,948 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 284 transitions. [2023-08-31 03:13:05,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 202 flow [2023-08-31 03:13:05,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 03:13:05,950 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-08-31 03:13:05,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-31 03:13:05,950 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-31 03:13:05,951 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-08-31 03:13:05,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:05,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:05,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:05,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:06,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-31 03:13:06,158 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:06,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash -539686553, now seen corresponding path program 2 times [2023-08-31 03:13:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:06,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16386700] [2023-08-31 03:13:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:06,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:13:06,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:06,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16386700] [2023-08-31 03:13:06,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16386700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659022696] [2023-08-31 03:13:06,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:13:06,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:06,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:06,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:06,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:13:06,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:13:06,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:06,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:13:06,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:13:06,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:06,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659022696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:06,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:06,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 12 [2023-08-31 03:13:06,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884690310] [2023-08-31 03:13:06,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:06,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 03:13:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:06,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 03:13:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-31 03:13:07,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-31 03:13:07,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 60.46153846153846) internal successors, (786), 13 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:07,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:07,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-31 03:13:07,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:07,353 INFO L130 PetriNetUnfolder]: 175/307 cut-off events. [2023-08-31 03:13:07,354 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2023-08-31 03:13:07,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 307 events. 175/307 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1043 event pairs, 10 based on Foata normal form. 22/329 useless extension candidates. Maximal degree in co-relation 316. Up to 131 conditions per place. [2023-08-31 03:13:07,357 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 47 selfloop transitions, 32 changer transitions 4/83 dead transitions. [2023-08-31 03:13:07,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 526 flow [2023-08-31 03:13:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 03:13:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 03:13:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 939 transitions. [2023-08-31 03:13:07,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44084507042253523 [2023-08-31 03:13:07,360 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 939 transitions. [2023-08-31 03:13:07,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 939 transitions. [2023-08-31 03:13:07,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:07,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 939 transitions. [2023-08-31 03:13:07,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 62.6) internal successors, (939), 15 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:07,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:07,367 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:07,367 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 15 states and 939 transitions. [2023-08-31 03:13:07,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 526 flow [2023-08-31 03:13:07,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 03:13:07,370 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 364 flow [2023-08-31 03:13:07,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=364, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-08-31 03:13:07,371 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-08-31 03:13:07,371 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 364 flow [2023-08-31 03:13:07,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.46153846153846) internal successors, (786), 13 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:07,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:07,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:07,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:07,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:07,578 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:07,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1477368276, now seen corresponding path program 3 times [2023-08-31 03:13:07,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:07,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821120533] [2023-08-31 03:13:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:07,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:07,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:07,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821120533] [2023-08-31 03:13:07,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821120533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:07,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879601500] [2023-08-31 03:13:07,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:13:07,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:07,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:07,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:13:07,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:13:07,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 03:13:07,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:08,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:08,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879601500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:08,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:08,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-31 03:13:08,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484664001] [2023-08-31 03:13:08,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:08,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:13:08,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:08,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:13:08,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:13:08,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-31 03:13:08,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 364 flow. Second operand has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:08,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:08,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-31 03:13:08,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:08,935 INFO L130 PetriNetUnfolder]: 313/565 cut-off events. [2023-08-31 03:13:08,935 INFO L131 PetriNetUnfolder]: For 2250/2250 co-relation queries the response was YES. [2023-08-31 03:13:08,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 565 events. 313/565 cut-off events. For 2250/2250 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2400 event pairs, 13 based on Foata normal form. 22/587 useless extension candidates. Maximal degree in co-relation 2022. Up to 183 conditions per place. [2023-08-31 03:13:08,941 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 93 selfloop transitions, 47 changer transitions 13/153 dead transitions. [2023-08-31 03:13:08,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 153 transitions, 1332 flow [2023-08-31 03:13:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 03:13:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 03:13:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1028 transitions. [2023-08-31 03:13:08,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524647887323944 [2023-08-31 03:13:08,945 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1028 transitions. [2023-08-31 03:13:08,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1028 transitions. [2023-08-31 03:13:08,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:08,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1028 transitions. [2023-08-31 03:13:08,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:08,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:08,951 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:08,951 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 364 flow. Second operand 16 states and 1028 transitions. [2023-08-31 03:13:08,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 153 transitions, 1332 flow [2023-08-31 03:13:08,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 153 transitions, 1273 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-08-31 03:13:08,961 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 741 flow [2023-08-31 03:13:08,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=741, PETRI_PLACES=63, PETRI_TRANSITIONS=77} [2023-08-31 03:13:08,961 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-08-31 03:13:08,962 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 741 flow [2023-08-31 03:13:08,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:08,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:08,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:08,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:09,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:09,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:09,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2047268056, now seen corresponding path program 4 times [2023-08-31 03:13:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:09,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408478189] [2023-08-31 03:13:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:09,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408478189] [2023-08-31 03:13:09,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408478189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118464548] [2023-08-31 03:13:09,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:13:09,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:09,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:13:09,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:13:09,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:09,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 03:13:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:09,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:09,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118464548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:09,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:09,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 03:13:09,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915143476] [2023-08-31 03:13:09,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:09,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:13:09,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:09,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:13:09,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:13:09,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-31 03:13:09,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 741 flow. Second operand has 16 states, 16 states have (on average 60.125) internal successors, (962), 16 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:09,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:09,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-31 03:13:09,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:10,513 INFO L130 PetriNetUnfolder]: 372/680 cut-off events. [2023-08-31 03:13:10,513 INFO L131 PetriNetUnfolder]: For 6308/6308 co-relation queries the response was YES. [2023-08-31 03:13:10,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 680 events. 372/680 cut-off events. For 6308/6308 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3114 event pairs, 24 based on Foata normal form. 38/718 useless extension candidates. Maximal degree in co-relation 3026. Up to 239 conditions per place. [2023-08-31 03:13:10,520 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 118 selfloop transitions, 54 changer transitions 11/183 dead transitions. [2023-08-31 03:13:10,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 183 transitions, 1855 flow [2023-08-31 03:13:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 03:13:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 03:13:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1226 transitions. [2023-08-31 03:13:10,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45441067457375833 [2023-08-31 03:13:10,524 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1226 transitions. [2023-08-31 03:13:10,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1226 transitions. [2023-08-31 03:13:10,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:10,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1226 transitions. [2023-08-31 03:13:10,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.52631578947368) internal successors, (1226), 19 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:10,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:10,532 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:10,532 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 741 flow. Second operand 19 states and 1226 transitions. [2023-08-31 03:13:10,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 183 transitions, 1855 flow [2023-08-31 03:13:10,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 183 transitions, 1690 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-08-31 03:13:10,551 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 1127 flow [2023-08-31 03:13:10,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1127, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2023-08-31 03:13:10,552 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-08-31 03:13:10,552 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 1127 flow [2023-08-31 03:13:10,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.125) internal successors, (962), 16 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:10,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:10,553 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:10,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:10,766 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:10,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1082077996, now seen corresponding path program 5 times [2023-08-31 03:13:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276720241] [2023-08-31 03:13:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:11,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:11,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276720241] [2023-08-31 03:13:11,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276720241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:11,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251216305] [2023-08-31 03:13:11,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:13:11,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:11,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:11,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:13:11,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:13:11,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:11,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:13:11,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:11,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:11,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251216305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:11,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:11,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 03:13:11,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524442056] [2023-08-31 03:13:11,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:11,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:13:11,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:11,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:13:11,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:13:11,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-08-31 03:13:11,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 1127 flow. Second operand has 16 states, 16 states have (on average 62.0625) internal successors, (993), 16 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:11,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:11,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-08-31 03:13:11,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:13,342 INFO L130 PetriNetUnfolder]: 537/1037 cut-off events. [2023-08-31 03:13:13,342 INFO L131 PetriNetUnfolder]: For 18920/18920 co-relation queries the response was YES. [2023-08-31 03:13:13,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6850 conditions, 1037 events. 537/1037 cut-off events. For 18920/18920 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5562 event pairs, 29 based on Foata normal form. 24/1061 useless extension candidates. Maximal degree in co-relation 5560. Up to 355 conditions per place. [2023-08-31 03:13:13,353 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 143 selfloop transitions, 105 changer transitions 33/281 dead transitions. [2023-08-31 03:13:13,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 281 transitions, 3057 flow [2023-08-31 03:13:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 03:13:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 03:13:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1997 transitions. [2023-08-31 03:13:13,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687793427230047 [2023-08-31 03:13:13,359 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1997 transitions. [2023-08-31 03:13:13,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1997 transitions. [2023-08-31 03:13:13,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:13,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1997 transitions. [2023-08-31 03:13:13,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 66.56666666666666) internal successors, (1997), 30 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:13,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:13,372 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:13,373 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 1127 flow. Second operand 30 states and 1997 transitions. [2023-08-31 03:13:13,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 281 transitions, 3057 flow [2023-08-31 03:13:13,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 281 transitions, 2806 flow, removed 119 selfloop flow, removed 3 redundant places. [2023-08-31 03:13:13,500 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1769 flow [2023-08-31 03:13:13,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1769, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2023-08-31 03:13:13,502 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 104 predicate places. [2023-08-31 03:13:13,502 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1769 flow [2023-08-31 03:13:13,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.0625) internal successors, (993), 16 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:13,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:13,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:13,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:13,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:13,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:13,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:13,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1580942134, now seen corresponding path program 6 times [2023-08-31 03:13:13,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:13,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388992169] [2023-08-31 03:13:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:13,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:13,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:13,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388992169] [2023-08-31 03:13:13,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388992169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:13,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435435540] [2023-08-31 03:13:13,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:13:13,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:13,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:13,932 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:13,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:13:13,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 03:13:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:13,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:13:13,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:14,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:14,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435435540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:14,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:14,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-31 03:13:14,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134143710] [2023-08-31 03:13:14,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:14,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:13:14,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:13:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:13:14,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-08-31 03:13:14,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1769 flow. Second operand has 14 states, 14 states have (on average 62.285714285714285) internal successors, (872), 14 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:14,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:14,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-08-31 03:13:14,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:15,585 INFO L130 PetriNetUnfolder]: 626/1220 cut-off events. [2023-08-31 03:13:15,586 INFO L131 PetriNetUnfolder]: For 29888/29888 co-relation queries the response was YES. [2023-08-31 03:13:15,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9038 conditions, 1220 events. 626/1220 cut-off events. For 29888/29888 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6893 event pairs, 103 based on Foata normal form. 40/1260 useless extension candidates. Maximal degree in co-relation 8284. Up to 443 conditions per place. [2023-08-31 03:13:15,600 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 114 selfloop transitions, 119 changer transitions 6/239 dead transitions. [2023-08-31 03:13:15,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 239 transitions, 3353 flow [2023-08-31 03:13:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:13:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:13:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1119 transitions. [2023-08-31 03:13:15,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635459817729909 [2023-08-31 03:13:15,605 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1119 transitions. [2023-08-31 03:13:15,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1119 transitions. [2023-08-31 03:13:15,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:15,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1119 transitions. [2023-08-31 03:13:15,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.82352941176471) internal successors, (1119), 17 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:15,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:15,612 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:15,612 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1769 flow. Second operand 17 states and 1119 transitions. [2023-08-31 03:13:15,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 239 transitions, 3353 flow [2023-08-31 03:13:15,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 239 transitions, 3099 flow, removed 97 selfloop flow, removed 13 redundant places. [2023-08-31 03:13:15,683 INFO L231 Difference]: Finished difference. Result has 133 places, 186 transitions, 2784 flow [2023-08-31 03:13:15,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2784, PETRI_PLACES=133, PETRI_TRANSITIONS=186} [2023-08-31 03:13:15,684 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-08-31 03:13:15,684 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 186 transitions, 2784 flow [2023-08-31 03:13:15,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.285714285714285) internal successors, (872), 14 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:15,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:15,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:15,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:15,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:15,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:15,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:15,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1860953658, now seen corresponding path program 7 times [2023-08-31 03:13:15,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:15,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081475874] [2023-08-31 03:13:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:16,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081475874] [2023-08-31 03:13:16,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081475874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585316242] [2023-08-31 03:13:16,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:13:16,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:16,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:16,045 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:16,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:13:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:16,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 03:13:16,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:16,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:16,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585316242] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:16,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:16,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 03:13:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418889164] [2023-08-31 03:13:16,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:16,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:13:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:13:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:13:16,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-31 03:13:16,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 186 transitions, 2784 flow. Second operand has 15 states, 15 states have (on average 60.06666666666667) internal successors, (901), 15 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:16,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:16,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-31 03:13:16,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:17,376 INFO L130 PetriNetUnfolder]: 810/1574 cut-off events. [2023-08-31 03:13:17,376 INFO L131 PetriNetUnfolder]: For 42907/42907 co-relation queries the response was YES. [2023-08-31 03:13:17,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12757 conditions, 1574 events. 810/1574 cut-off events. For 42907/42907 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9502 event pairs, 98 based on Foata normal form. 52/1626 useless extension candidates. Maximal degree in co-relation 11619. Up to 1051 conditions per place. [2023-08-31 03:13:17,399 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 213 selfloop transitions, 130 changer transitions 6/349 dead transitions. [2023-08-31 03:13:17,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 349 transitions, 5476 flow [2023-08-31 03:13:17,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 03:13:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 03:13:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1481 transitions. [2023-08-31 03:13:17,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345988977342316 [2023-08-31 03:13:17,406 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1481 transitions. [2023-08-31 03:13:17,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1481 transitions. [2023-08-31 03:13:17,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:17,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1481 transitions. [2023-08-31 03:13:17,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.3913043478261) internal successors, (1481), 23 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:17,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:17,419 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:17,420 INFO L175 Difference]: Start difference. First operand has 133 places, 186 transitions, 2784 flow. Second operand 23 states and 1481 transitions. [2023-08-31 03:13:17,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 349 transitions, 5476 flow [2023-08-31 03:13:17,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 349 transitions, 5026 flow, removed 215 selfloop flow, removed 4 redundant places. [2023-08-31 03:13:17,594 INFO L231 Difference]: Finished difference. Result has 165 places, 256 transitions, 4217 flow [2023-08-31 03:13:17,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4217, PETRI_PLACES=165, PETRI_TRANSITIONS=256} [2023-08-31 03:13:17,596 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-08-31 03:13:17,596 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 256 transitions, 4217 flow [2023-08-31 03:13:17,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 60.06666666666667) internal successors, (901), 15 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:17,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:17,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:17,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 03:13:17,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-31 03:13:17,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:17,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1468102828, now seen corresponding path program 8 times [2023-08-31 03:13:17,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:17,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134662946] [2023-08-31 03:13:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:17,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:17,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:17,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134662946] [2023-08-31 03:13:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134662946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86814823] [2023-08-31 03:13:17,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:13:17,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:17,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:17,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:17,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:13:18,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:13:18,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:18,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:13:18,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:18,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:18,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86814823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:18,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:18,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 03:13:18,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676748663] [2023-08-31 03:13:18,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:18,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:13:18,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:13:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:13:18,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-08-31 03:13:18,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 256 transitions, 4217 flow. Second operand has 15 states, 15 states have (on average 61.733333333333334) internal successors, (926), 15 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:18,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:18,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-08-31 03:13:18,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:20,162 INFO L130 PetriNetUnfolder]: 998/1958 cut-off events. [2023-08-31 03:13:20,163 INFO L131 PetriNetUnfolder]: For 73427/73427 co-relation queries the response was YES. [2023-08-31 03:13:20,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17101 conditions, 1958 events. 998/1958 cut-off events. For 73427/73427 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12509 event pairs, 168 based on Foata normal form. 24/1982 useless extension candidates. Maximal degree in co-relation 14924. Up to 886 conditions per place. [2023-08-31 03:13:20,221 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 209 selfloop transitions, 183 changer transitions 5/397 dead transitions. [2023-08-31 03:13:20,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 7052 flow [2023-08-31 03:13:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 03:13:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 03:13:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1459 transitions. [2023-08-31 03:13:20,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46702944942381563 [2023-08-31 03:13:20,224 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1459 transitions. [2023-08-31 03:13:20,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1459 transitions. [2023-08-31 03:13:20,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:20,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1459 transitions. [2023-08-31 03:13:20,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.31818181818181) internal successors, (1459), 22 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:20,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:20,232 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:20,232 INFO L175 Difference]: Start difference. First operand has 165 places, 256 transitions, 4217 flow. Second operand 22 states and 1459 transitions. [2023-08-31 03:13:20,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 7052 flow [2023-08-31 03:13:20,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 397 transitions, 6218 flow, removed 399 selfloop flow, removed 5 redundant places. [2023-08-31 03:13:20,479 INFO L231 Difference]: Finished difference. Result has 191 places, 307 transitions, 5255 flow [2023-08-31 03:13:20,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5255, PETRI_PLACES=191, PETRI_TRANSITIONS=307} [2023-08-31 03:13:20,480 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-08-31 03:13:20,480 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 307 transitions, 5255 flow [2023-08-31 03:13:20,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.733333333333334) internal successors, (926), 15 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:20,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:20,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:20,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:20,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:20,681 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:20,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash 265383622, now seen corresponding path program 9 times [2023-08-31 03:13:20,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:20,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768502956] [2023-08-31 03:13:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:20,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:21,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768502956] [2023-08-31 03:13:21,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768502956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902267234] [2023-08-31 03:13:21,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:13:21,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:21,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:21,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:21,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:13:21,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:13:21,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 03:13:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:21,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:13:21,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902267234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:21,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:21,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 14 [2023-08-31 03:13:21,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268057638] [2023-08-31 03:13:21,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:21,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:13:21,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:13:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:13:21,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-31 03:13:21,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 307 transitions, 5255 flow. Second operand has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:21,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:21,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-31 03:13:21,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:22,523 INFO L130 PetriNetUnfolder]: 1299/2549 cut-off events. [2023-08-31 03:13:22,524 INFO L131 PetriNetUnfolder]: For 103937/103953 co-relation queries the response was YES. [2023-08-31 03:13:22,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23668 conditions, 2549 events. 1299/2549 cut-off events. For 103937/103953 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 17434 event pairs, 132 based on Foata normal form. 29/2571 useless extension candidates. Maximal degree in co-relation 22640. Up to 1027 conditions per place. [2023-08-31 03:13:22,553 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 241 selfloop transitions, 132 changer transitions 88/471 dead transitions. [2023-08-31 03:13:22,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 471 transitions, 9139 flow [2023-08-31 03:13:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 03:13:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 03:13:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 719 transitions. [2023-08-31 03:13:22,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46030729833546735 [2023-08-31 03:13:22,556 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 719 transitions. [2023-08-31 03:13:22,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 719 transitions. [2023-08-31 03:13:22,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:22,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 719 transitions. [2023-08-31 03:13:22,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.36363636363636) internal successors, (719), 11 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:22,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:22,560 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:22,560 INFO L175 Difference]: Start difference. First operand has 191 places, 307 transitions, 5255 flow. Second operand 11 states and 719 transitions. [2023-08-31 03:13:22,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 471 transitions, 9139 flow [2023-08-31 03:13:22,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 471 transitions, 8886 flow, removed 92 selfloop flow, removed 4 redundant places. [2023-08-31 03:13:22,870 INFO L231 Difference]: Finished difference. Result has 203 places, 330 transitions, 6244 flow [2023-08-31 03:13:22,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6244, PETRI_PLACES=203, PETRI_TRANSITIONS=330} [2023-08-31 03:13:22,871 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2023-08-31 03:13:22,871 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 330 transitions, 6244 flow [2023-08-31 03:13:22,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:22,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:22,872 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:22,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:23,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 03:13:23,097 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:23,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:23,098 INFO L85 PathProgramCache]: Analyzing trace with hash -27278176, now seen corresponding path program 10 times [2023-08-31 03:13:23,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:23,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480031282] [2023-08-31 03:13:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:23,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:23,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:23,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480031282] [2023-08-31 03:13:23,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480031282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:23,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197621090] [2023-08-31 03:13:23,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:13:23,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:23,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:23,391 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:23,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:13:23,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:13:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:23,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:13:23,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:13:23,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:13:23,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197621090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:23,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:23,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-08-31 03:13:23,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9734581] [2023-08-31 03:13:23,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:23,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:13:23,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:23,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:13:23,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:13:24,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:13:24,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 330 transitions, 6244 flow. Second operand has 15 states, 15 states have (on average 58.266666666666666) internal successors, (874), 15 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:24,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:24,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:13:24,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:25,504 INFO L130 PetriNetUnfolder]: 1163/2353 cut-off events. [2023-08-31 03:13:25,504 INFO L131 PetriNetUnfolder]: For 125038/125038 co-relation queries the response was YES. [2023-08-31 03:13:25,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22748 conditions, 2353 events. 1163/2353 cut-off events. For 125038/125038 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16153 event pairs, 98 based on Foata normal form. 62/2415 useless extension candidates. Maximal degree in co-relation 21468. Up to 972 conditions per place. [2023-08-31 03:13:25,527 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 274 selfloop transitions, 154 changer transitions 48/476 dead transitions. [2023-08-31 03:13:25,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 476 transitions, 9738 flow [2023-08-31 03:13:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 03:13:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 03:13:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2005 transitions. [2023-08-31 03:13:25,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278702518139138 [2023-08-31 03:13:25,531 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2005 transitions. [2023-08-31 03:13:25,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2005 transitions. [2023-08-31 03:13:25,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:25,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2005 transitions. [2023-08-31 03:13:25,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.75757575757576) internal successors, (2005), 33 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:25,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:25,554 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:25,555 INFO L175 Difference]: Start difference. First operand has 203 places, 330 transitions, 6244 flow. Second operand 33 states and 2005 transitions. [2023-08-31 03:13:25,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 476 transitions, 9738 flow [2023-08-31 03:13:26,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 476 transitions, 9256 flow, removed 217 selfloop flow, removed 3 redundant places. [2023-08-31 03:13:26,032 INFO L231 Difference]: Finished difference. Result has 243 places, 357 transitions, 7078 flow [2023-08-31 03:13:26,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7078, PETRI_PLACES=243, PETRI_TRANSITIONS=357} [2023-08-31 03:13:26,033 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2023-08-31 03:13:26,033 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 357 transitions, 7078 flow [2023-08-31 03:13:26,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.266666666666666) internal successors, (874), 15 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:26,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:26,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:26,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:26,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 03:13:26,235 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:13:26,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1060710988, now seen corresponding path program 11 times [2023-08-31 03:13:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132851799] [2023-08-31 03:13:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:26,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:26,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132851799] [2023-08-31 03:13:26,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132851799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:26,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080782154] [2023-08-31 03:13:26,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:13:26,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:26,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:26,426 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:13:26,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:13:26,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:13:26,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:26,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 03:13:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:26,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:53,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080782154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:53,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:53,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-08-31 03:13:53,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040753347] [2023-08-31 03:13:53,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:53,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:13:53,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:53,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:13:53,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:13:54,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:13:54,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 357 transitions, 7078 flow. Second operand has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:54,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:54,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:13:54,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:14:00,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:14:02,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:14:10,071 WARN L222 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 85 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:14:12,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:14:15,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:14:20,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:14:25,194 INFO L130 PetriNetUnfolder]: 1363/2716 cut-off events. [2023-08-31 03:14:25,194 INFO L131 PetriNetUnfolder]: For 138597/138597 co-relation queries the response was YES. [2023-08-31 03:14:25,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26866 conditions, 2716 events. 1363/2716 cut-off events. For 138597/138597 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 18925 event pairs, 34 based on Foata normal form. 36/2752 useless extension candidates. Maximal degree in co-relation 26278. Up to 698 conditions per place. [2023-08-31 03:14:25,222 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 225 selfloop transitions, 324 changer transitions 4/553 dead transitions. [2023-08-31 03:14:25,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 553 transitions, 11804 flow [2023-08-31 03:14:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 03:14:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 03:14:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1656 transitions. [2023-08-31 03:14:25,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431924882629108 [2023-08-31 03:14:25,226 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1656 transitions. [2023-08-31 03:14:25,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1656 transitions. [2023-08-31 03:14:25,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:14:25,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1656 transitions. [2023-08-31 03:14:25,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 61.333333333333336) internal successors, (1656), 27 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:25,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:25,234 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:25,234 INFO L175 Difference]: Start difference. First operand has 243 places, 357 transitions, 7078 flow. Second operand 27 states and 1656 transitions. [2023-08-31 03:14:25,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 553 transitions, 11804 flow [2023-08-31 03:14:25,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 553 transitions, 11022 flow, removed 256 selfloop flow, removed 14 redundant places. [2023-08-31 03:14:25,850 INFO L231 Difference]: Finished difference. Result has 259 places, 471 transitions, 10557 flow [2023-08-31 03:14:25,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=6557, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10557, PETRI_PLACES=259, PETRI_TRANSITIONS=471} [2023-08-31 03:14:25,852 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-08-31 03:14:25,852 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 471 transitions, 10557 flow [2023-08-31 03:14:25,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:25,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:14:25,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:14:25,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 03:14:26,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 03:14:26,053 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:14:26,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:14:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash 881546728, now seen corresponding path program 12 times [2023-08-31 03:14:26,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:14:26,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419543067] [2023-08-31 03:14:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:14:26,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:14:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:14:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:14:26,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:14:26,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419543067] [2023-08-31 03:14:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419543067] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:14:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018114704] [2023-08-31 03:14:26,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:14:26,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:14:26,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:14:26,245 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:14:26,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 03:14:26,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:14:26,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:14:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 03:14:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:14:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:14:26,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:14:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:14:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018114704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:14:50,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:14:50,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 03:14:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101355207] [2023-08-31 03:14:50,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:14:50,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:14:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:14:50,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:14:50,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:14:51,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-31 03:14:51,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 471 transitions, 10557 flow. Second operand has 18 states, 18 states have (on average 59.94444444444444) internal successors, (1079), 18 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:51,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:14:51,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-31 03:14:51,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:14:58,824 INFO L130 PetriNetUnfolder]: 1533/3132 cut-off events. [2023-08-31 03:14:58,824 INFO L131 PetriNetUnfolder]: For 161994/161994 co-relation queries the response was YES. [2023-08-31 03:14:58,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33223 conditions, 3132 events. 1533/3132 cut-off events. For 161994/161994 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22913 event pairs, 36 based on Foata normal form. 36/3168 useless extension candidates. Maximal degree in co-relation 32459. Up to 823 conditions per place. [2023-08-31 03:14:58,853 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 241 selfloop transitions, 375 changer transitions 5/621 dead transitions. [2023-08-31 03:14:58,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 621 transitions, 15123 flow [2023-08-31 03:14:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 03:14:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 03:14:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1218 transitions. [2023-08-31 03:14:58,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514455151964418 [2023-08-31 03:14:58,857 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1218 transitions. [2023-08-31 03:14:58,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1218 transitions. [2023-08-31 03:14:58,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:14:58,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1218 transitions. [2023-08-31 03:14:58,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:58,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:58,863 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:58,863 INFO L175 Difference]: Start difference. First operand has 259 places, 471 transitions, 10557 flow. Second operand 19 states and 1218 transitions. [2023-08-31 03:14:58,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 621 transitions, 15123 flow [2023-08-31 03:14:59,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 621 transitions, 13334 flow, removed 835 selfloop flow, removed 20 redundant places. [2023-08-31 03:14:59,747 INFO L231 Difference]: Finished difference. Result has 265 places, 545 transitions, 12746 flow [2023-08-31 03:14:59,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=9281, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12746, PETRI_PLACES=265, PETRI_TRANSITIONS=545} [2023-08-31 03:14:59,747 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 245 predicate places. [2023-08-31 03:14:59,748 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 545 transitions, 12746 flow [2023-08-31 03:14:59,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 59.94444444444444) internal successors, (1079), 18 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:59,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:14:59,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:14:59,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 03:14:59,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 03:14:59,956 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:14:59,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:14:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2093573005, now seen corresponding path program 13 times [2023-08-31 03:14:59,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:14:59,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937675632] [2023-08-31 03:14:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:14:59,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:15:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:15:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:00,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:15:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937675632] [2023-08-31 03:15:00,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937675632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:15:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430004893] [2023-08-31 03:15:00,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:15:00,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:15:00,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:15:00,318 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:15:00,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 03:15:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:15:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 03:15:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:15:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:00,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:15:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:00,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430004893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:15:00,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:15:00,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 03:15:00,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585606626] [2023-08-31 03:15:00,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:15:00,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 03:15:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:15:00,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 03:15:00,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-08-31 03:15:01,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:15:01,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 545 transitions, 12746 flow. Second operand has 24 states, 24 states have (on average 58.083333333333336) internal successors, (1394), 24 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:01,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:15:01,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:15:01,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:15:04,215 INFO L130 PetriNetUnfolder]: 3080/6382 cut-off events. [2023-08-31 03:15:04,216 INFO L131 PetriNetUnfolder]: For 240533/240533 co-relation queries the response was YES. [2023-08-31 03:15:04,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64923 conditions, 6382 events. 3080/6382 cut-off events. For 240533/240533 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 53636 event pairs, 360 based on Foata normal form. 71/6453 useless extension candidates. Maximal degree in co-relation 63253. Up to 2489 conditions per place. [2023-08-31 03:15:04,276 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 867 selfloop transitions, 363 changer transitions 26/1256 dead transitions. [2023-08-31 03:15:04,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1256 transitions, 31200 flow [2023-08-31 03:15:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 03:15:04,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 03:15:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2119 transitions. [2023-08-31 03:15:04,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388980944490472 [2023-08-31 03:15:04,279 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2119 transitions. [2023-08-31 03:15:04,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2119 transitions. [2023-08-31 03:15:04,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:15:04,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2119 transitions. [2023-08-31 03:15:04,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 62.3235294117647) internal successors, (2119), 34 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:04,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:04,289 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:04,289 INFO L175 Difference]: Start difference. First operand has 265 places, 545 transitions, 12746 flow. Second operand 34 states and 2119 transitions. [2023-08-31 03:15:04,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1256 transitions, 31200 flow [2023-08-31 03:15:06,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1256 transitions, 28868 flow, removed 1008 selfloop flow, removed 9 redundant places. [2023-08-31 03:15:06,518 INFO L231 Difference]: Finished difference. Result has 304 places, 783 transitions, 18653 flow [2023-08-31 03:15:06,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=11836, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=18653, PETRI_PLACES=304, PETRI_TRANSITIONS=783} [2023-08-31 03:15:06,519 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 284 predicate places. [2023-08-31 03:15:06,519 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 783 transitions, 18653 flow [2023-08-31 03:15:06,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 58.083333333333336) internal successors, (1394), 24 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:06,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:15:06,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:15:06,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 03:15:06,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:15:06,725 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:15:06,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:15:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1409815783, now seen corresponding path program 14 times [2023-08-31 03:15:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:15:06,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747328337] [2023-08-31 03:15:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:15:06,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:15:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:15:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:07,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:15:07,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747328337] [2023-08-31 03:15:07,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747328337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:15:07,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280706834] [2023-08-31 03:15:07,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:15:07,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:15:07,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:15:07,040 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:15:07,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 03:15:07,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:15:07,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:15:07,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:15:07,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:15:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:07,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:15:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:07,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280706834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:15:07,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:15:07,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-31 03:15:07,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751474404] [2023-08-31 03:15:07,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:15:07,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:15:07,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:15:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:15:07,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:15:08,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:15:08,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 783 transitions, 18653 flow. Second operand has 21 states, 21 states have (on average 57.76190476190476) internal successors, (1213), 21 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:08,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:15:08,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:15:08,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:15:12,702 INFO L130 PetriNetUnfolder]: 3867/8208 cut-off events. [2023-08-31 03:15:12,703 INFO L131 PetriNetUnfolder]: For 327143/327143 co-relation queries the response was YES. [2023-08-31 03:15:12,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84432 conditions, 8208 events. 3867/8208 cut-off events. For 327143/327143 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 73795 event pairs, 101 based on Foata normal form. 60/8268 useless extension candidates. Maximal degree in co-relation 82651. Up to 1619 conditions per place. [2023-08-31 03:15:12,848 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 698 selfloop transitions, 896 changer transitions 19/1613 dead transitions. [2023-08-31 03:15:12,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1613 transitions, 40023 flow [2023-08-31 03:15:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-31 03:15:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-31 03:15:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2833 transitions. [2023-08-31 03:15:12,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44334898278560253 [2023-08-31 03:15:12,852 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2833 transitions. [2023-08-31 03:15:12,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2833 transitions. [2023-08-31 03:15:12,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:15:12,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2833 transitions. [2023-08-31 03:15:12,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.955555555555556) internal successors, (2833), 45 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:12,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:12,864 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:12,864 INFO L175 Difference]: Start difference. First operand has 304 places, 783 transitions, 18653 flow. Second operand 45 states and 2833 transitions. [2023-08-31 03:15:12,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1613 transitions, 40023 flow [2023-08-31 03:15:16,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1613 transitions, 38834 flow, removed 550 selfloop flow, removed 8 redundant places. [2023-08-31 03:15:16,101 INFO L231 Difference]: Finished difference. Result has 353 places, 1159 transitions, 30829 flow [2023-08-31 03:15:16,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=17766, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=550, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=30829, PETRI_PLACES=353, PETRI_TRANSITIONS=1159} [2023-08-31 03:15:16,102 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 333 predicate places. [2023-08-31 03:15:16,102 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1159 transitions, 30829 flow [2023-08-31 03:15:16,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.76190476190476) internal successors, (1213), 21 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:16,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:15:16,103 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:15:16,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 03:15:16,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 03:15:16,309 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:15:16,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:15:16,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1427321081, now seen corresponding path program 15 times [2023-08-31 03:15:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:15:16,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933849374] [2023-08-31 03:15:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:15:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:15:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:15:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:16,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:15:16,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933849374] [2023-08-31 03:15:16,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933849374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:15:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92074746] [2023-08-31 03:15:16,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:15:16,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:15:16,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:15:16,605 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:15:16,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 03:15:16,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:15:16,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:15:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 03:15:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:15:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:16,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:15:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:17,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92074746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:15:17,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:15:17,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-31 03:15:17,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511345237] [2023-08-31 03:15:17,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:15:17,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:15:17,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:15:17,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:15:17,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:15:17,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:15:17,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1159 transitions, 30829 flow. Second operand has 21 states, 21 states have (on average 57.80952380952381) internal successors, (1214), 21 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:17,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:15:17,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:15:17,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:15:22,433 INFO L130 PetriNetUnfolder]: 3963/8382 cut-off events. [2023-08-31 03:15:22,434 INFO L131 PetriNetUnfolder]: For 405928/405928 co-relation queries the response was YES. [2023-08-31 03:15:22,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91646 conditions, 8382 events. 3963/8382 cut-off events. For 405928/405928 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 75235 event pairs, 527 based on Foata normal form. 88/8470 useless extension candidates. Maximal degree in co-relation 89915. Up to 3793 conditions per place. [2023-08-31 03:15:22,543 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1095 selfloop transitions, 401 changer transitions 9/1505 dead transitions. [2023-08-31 03:15:22,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1505 transitions, 40440 flow [2023-08-31 03:15:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 03:15:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 03:15:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2052 transitions. [2023-08-31 03:15:22,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379001280409731 [2023-08-31 03:15:22,546 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2052 transitions. [2023-08-31 03:15:22,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2052 transitions. [2023-08-31 03:15:22,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:15:22,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2052 transitions. [2023-08-31 03:15:22,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 62.18181818181818) internal successors, (2052), 33 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:22,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:22,556 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:22,556 INFO L175 Difference]: Start difference. First operand has 353 places, 1159 transitions, 30829 flow. Second operand 33 states and 2052 transitions. [2023-08-31 03:15:22,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1505 transitions, 40440 flow [2023-08-31 03:15:27,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1505 transitions, 38816 flow, removed 765 selfloop flow, removed 14 redundant places. [2023-08-31 03:15:27,288 INFO L231 Difference]: Finished difference. Result has 380 places, 1213 transitions, 32098 flow [2023-08-31 03:15:27,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=29407, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=32098, PETRI_PLACES=380, PETRI_TRANSITIONS=1213} [2023-08-31 03:15:27,289 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 360 predicate places. [2023-08-31 03:15:27,289 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1213 transitions, 32098 flow [2023-08-31 03:15:27,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.80952380952381) internal successors, (1214), 21 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:27,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:15:27,290 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:15:27,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 03:15:27,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 03:15:27,491 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:15:27,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:15:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash 604358229, now seen corresponding path program 16 times [2023-08-31 03:15:27,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:15:27,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234509498] [2023-08-31 03:15:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:15:27,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:15:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:15:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:27,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:15:27,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234509498] [2023-08-31 03:15:27,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234509498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:15:27,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46694266] [2023-08-31 03:15:27,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:15:27,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:15:27,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:15:27,805 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:15:27,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 03:15:27,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:15:27,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:15:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 03:15:27,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:15:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:28,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:15:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:28,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46694266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:15:28,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:15:28,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-31 03:15:28,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033098410] [2023-08-31 03:15:28,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:15:28,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:15:28,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:15:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:15:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:15:28,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:15:28,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1213 transitions, 32098 flow. Second operand has 23 states, 23 states have (on average 57.78260869565217) internal successors, (1329), 23 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:28,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:15:28,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:15:28,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:15:36,554 INFO L130 PetriNetUnfolder]: 4016/8451 cut-off events. [2023-08-31 03:15:36,554 INFO L131 PetriNetUnfolder]: For 441495/441495 co-relation queries the response was YES. [2023-08-31 03:15:36,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92782 conditions, 8451 events. 4016/8451 cut-off events. For 441495/441495 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 75672 event pairs, 211 based on Foata normal form. 54/8505 useless extension candidates. Maximal degree in co-relation 91213. Up to 2536 conditions per place. [2023-08-31 03:15:36,656 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 615 selfloop transitions, 790 changer transitions 15/1420 dead transitions. [2023-08-31 03:15:36,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1420 transitions, 38025 flow [2023-08-31 03:15:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 03:15:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 03:15:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2455 transitions. [2023-08-31 03:15:36,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43221830985915494 [2023-08-31 03:15:36,659 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2455 transitions. [2023-08-31 03:15:36,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2455 transitions. [2023-08-31 03:15:36,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:15:36,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2455 transitions. [2023-08-31 03:15:36,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 61.375) internal successors, (2455), 40 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:36,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:36,668 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:36,668 INFO L175 Difference]: Start difference. First operand has 380 places, 1213 transitions, 32098 flow. Second operand 40 states and 2455 transitions. [2023-08-31 03:15:36,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1420 transitions, 38025 flow [2023-08-31 03:15:42,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1420 transitions, 37315 flow, removed 245 selfloop flow, removed 15 redundant places. [2023-08-31 03:15:42,092 INFO L231 Difference]: Finished difference. Result has 412 places, 1267 transitions, 34998 flow [2023-08-31 03:15:42,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=31240, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=725, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=34998, PETRI_PLACES=412, PETRI_TRANSITIONS=1267} [2023-08-31 03:15:42,093 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-08-31 03:15:42,094 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1267 transitions, 34998 flow [2023-08-31 03:15:42,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.78260869565217) internal successors, (1329), 23 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:42,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:15:42,094 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:15:42,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-31 03:15:42,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:15:42,295 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:15:42,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:15:42,295 INFO L85 PathProgramCache]: Analyzing trace with hash -237627691, now seen corresponding path program 17 times [2023-08-31 03:15:42,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:15:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284590517] [2023-08-31 03:15:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:15:42,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:15:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:15:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:42,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:15:42,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284590517] [2023-08-31 03:15:42,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284590517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:15:42,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113217178] [2023-08-31 03:15:42,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:15:42,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:15:42,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:15:42,542 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:15:42,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 03:15:42,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:15:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:15:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:15:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:16:45,511 WARN L222 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 4057 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-31 03:16:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:45,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:16:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:45,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113217178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:16:45,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:16:45,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-08-31 03:16:45,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37152477] [2023-08-31 03:16:45,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:16:45,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:16:45,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:16:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:16:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:16:46,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:16:46,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1267 transitions, 34998 flow. Second operand has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:46,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:16:46,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:16:46,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:16:51,477 INFO L130 PetriNetUnfolder]: 4594/9588 cut-off events. [2023-08-31 03:16:51,477 INFO L131 PetriNetUnfolder]: For 599726/599726 co-relation queries the response was YES. [2023-08-31 03:16:51,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112988 conditions, 9588 events. 4594/9588 cut-off events. For 599726/599726 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 86996 event pairs, 433 based on Foata normal form. 70/9658 useless extension candidates. Maximal degree in co-relation 110767. Up to 3743 conditions per place. [2023-08-31 03:16:51,622 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 814 selfloop transitions, 737 changer transitions 21/1572 dead transitions. [2023-08-31 03:16:51,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1572 transitions, 46281 flow [2023-08-31 03:16:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:16:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:16:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1698 transitions. [2023-08-31 03:16:51,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42706237424547283 [2023-08-31 03:16:51,625 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1698 transitions. [2023-08-31 03:16:51,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1698 transitions. [2023-08-31 03:16:51,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:16:51,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1698 transitions. [2023-08-31 03:16:51,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 60.642857142857146) internal successors, (1698), 28 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:51,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:51,632 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:51,632 INFO L175 Difference]: Start difference. First operand has 412 places, 1267 transitions, 34998 flow. Second operand 28 states and 1698 transitions. [2023-08-31 03:16:51,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1572 transitions, 46281 flow [2023-08-31 03:16:59,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1572 transitions, 45150 flow, removed 454 selfloop flow, removed 21 redundant places. [2023-08-31 03:16:59,769 INFO L231 Difference]: Finished difference. Result has 427 places, 1428 transitions, 41562 flow [2023-08-31 03:16:59,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=33711, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=41562, PETRI_PLACES=427, PETRI_TRANSITIONS=1428} [2023-08-31 03:16:59,770 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 407 predicate places. [2023-08-31 03:16:59,771 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 1428 transitions, 41562 flow [2023-08-31 03:16:59,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:59,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:16:59,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:16:59,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 03:16:59,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:16:59,977 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:16:59,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:16:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1936626857, now seen corresponding path program 18 times [2023-08-31 03:16:59,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:16:59,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082232796] [2023-08-31 03:16:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:16:59,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:16:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:17:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:00,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:17:00,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082232796] [2023-08-31 03:17:00,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082232796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:17:00,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806837280] [2023-08-31 03:17:00,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:17:00,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:17:00,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:17:00,261 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:17:00,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 03:17:00,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 03:17:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:17:00,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:17:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:17:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:00,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:17:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806837280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:17:01,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:17:01,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-31 03:17:01,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42006636] [2023-08-31 03:17:01,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:17:01,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:17:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:17:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:17:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:17:01,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:17:01,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1428 transitions, 41562 flow. Second operand has 23 states, 23 states have (on average 57.78260869565217) internal successors, (1329), 23 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:01,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:17:01,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:17:01,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:17:38,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:17:53,515 INFO L130 PetriNetUnfolder]: 6430/13671 cut-off events. [2023-08-31 03:17:53,515 INFO L131 PetriNetUnfolder]: For 997447/997447 co-relation queries the response was YES. [2023-08-31 03:17:53,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165872 conditions, 13671 events. 6430/13671 cut-off events. For 997447/997447 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 133968 event pairs, 194 based on Foata normal form. 90/13761 useless extension candidates. Maximal degree in co-relation 162524. Up to 3448 conditions per place. [2023-08-31 03:17:54,000 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1019 selfloop transitions, 1335 changer transitions 14/2368 dead transitions. [2023-08-31 03:17:54,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2368 transitions, 71708 flow [2023-08-31 03:17:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-31 03:17:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-31 03:17:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3833 transitions. [2023-08-31 03:17:54,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353702862335302 [2023-08-31 03:17:54,031 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3833 transitions. [2023-08-31 03:17:54,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3833 transitions. [2023-08-31 03:17:54,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:17:54,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3833 transitions. [2023-08-31 03:17:54,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 61.82258064516129) internal successors, (3833), 62 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:54,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 142.0) internal successors, (8946), 63 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:54,047 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 142.0) internal successors, (8946), 63 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:54,047 INFO L175 Difference]: Start difference. First operand has 427 places, 1428 transitions, 41562 flow. Second operand 62 states and 3833 transitions. [2023-08-31 03:17:54,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2368 transitions, 71708 flow [2023-08-31 03:18:09,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2368 transitions, 67990 flow, removed 1526 selfloop flow, removed 15 redundant places. [2023-08-31 03:18:09,104 INFO L231 Difference]: Finished difference. Result has 496 places, 1922 transitions, 59327 flow [2023-08-31 03:18:09,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=39190, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=907, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=59327, PETRI_PLACES=496, PETRI_TRANSITIONS=1922} [2023-08-31 03:18:09,106 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 476 predicate places. [2023-08-31 03:18:09,106 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 1922 transitions, 59327 flow [2023-08-31 03:18:09,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.78260869565217) internal successors, (1329), 23 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:09,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:18:09,106 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:18:09,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 03:18:09,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:18:09,307 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:18:09,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:18:09,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1238970189, now seen corresponding path program 19 times [2023-08-31 03:18:09,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:18:09,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064199751] [2023-08-31 03:18:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:18:09,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:18:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:18:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:09,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:18:09,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064199751] [2023-08-31 03:18:09,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064199751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:18:09,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62299239] [2023-08-31 03:18:09,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:18:09,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:18:09,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:18:09,608 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:18:09,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 03:18:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:18:09,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 03:18:09,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:18:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:09,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:18:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:27,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62299239] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:18:27,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:18:27,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-31 03:18:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291819206] [2023-08-31 03:18:27,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:18:27,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:18:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:18:27,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:18:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=311, Unknown=2, NotChecked=0, Total=420 [2023-08-31 03:18:29,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:18:30,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:18:33,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:18:35,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:18:37,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:18:39,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:18:39,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-08-31 03:18:39,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1922 transitions, 59327 flow. Second operand has 21 states, 21 states have (on average 54.523809523809526) internal successors, (1145), 21 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:39,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:18:39,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-08-31 03:18:39,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:18:58,326 INFO L130 PetriNetUnfolder]: 7248/15454 cut-off events. [2023-08-31 03:18:58,326 INFO L131 PetriNetUnfolder]: For 1244937/1244937 co-relation queries the response was YES. [2023-08-31 03:18:58,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196990 conditions, 15454 events. 7248/15454 cut-off events. For 1244937/1244937 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 154954 event pairs, 331 based on Foata normal form. 90/15544 useless extension candidates. Maximal degree in co-relation 193054. Up to 3197 conditions per place. [2023-08-31 03:18:58,538 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 1037 selfloop transitions, 1269 changer transitions 25/2331 dead transitions. [2023-08-31 03:18:58,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 2331 transitions, 75640 flow [2023-08-31 03:18:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 03:18:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 03:18:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2831 transitions. [2023-08-31 03:18:58,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40686979016958896 [2023-08-31 03:18:58,542 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2831 transitions. [2023-08-31 03:18:58,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2831 transitions. [2023-08-31 03:18:58,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:18:58,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2831 transitions. [2023-08-31 03:18:58,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.775510204081634) internal successors, (2831), 49 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:58,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 142.0) internal successors, (7100), 50 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:58,552 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 142.0) internal successors, (7100), 50 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:58,552 INFO L175 Difference]: Start difference. First operand has 496 places, 1922 transitions, 59327 flow. Second operand 49 states and 2831 transitions. [2023-08-31 03:18:58,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 2331 transitions, 75640 flow [2023-08-31 03:19:19,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 2331 transitions, 73361 flow, removed 1071 selfloop flow, removed 20 redundant places. [2023-08-31 03:19:19,232 INFO L231 Difference]: Finished difference. Result has 537 places, 2065 transitions, 66855 flow [2023-08-31 03:19:19,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=56365, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=66855, PETRI_PLACES=537, PETRI_TRANSITIONS=2065} [2023-08-31 03:19:19,235 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 517 predicate places. [2023-08-31 03:19:19,235 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 2065 transitions, 66855 flow [2023-08-31 03:19:19,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.523809523809526) internal successors, (1145), 21 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:19:19,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:19:19,235 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:19:19,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 03:19:19,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-31 03:19:19,441 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:19:19,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:19:19,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2080956109, now seen corresponding path program 20 times [2023-08-31 03:19:19,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:19:19,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760317218] [2023-08-31 03:19:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:19:19,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:19:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:19:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:19:19,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:19:19,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760317218] [2023-08-31 03:19:19,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760317218] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:19:19,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558386373] [2023-08-31 03:19:19,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:19:19,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:19:19,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:19:19,770 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:19:19,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 03:19:19,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:19:19,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:19:19,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 03:19:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:19:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:19:20,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:19:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:19:20,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558386373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:19:20,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:19:20,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-31 03:19:20,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393003333] [2023-08-31 03:19:20,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:19:20,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:19:20,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:19:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:19:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-08-31 03:19:20,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:19:20,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 2065 transitions, 66855 flow. Second operand has 25 states, 25 states have (on average 57.88) internal successors, (1447), 25 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:19:20,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:19:20,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:19:20,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:19:40,036 INFO L130 PetriNetUnfolder]: 8569/18185 cut-off events. [2023-08-31 03:19:40,036 INFO L131 PetriNetUnfolder]: For 1678894/1678894 co-relation queries the response was YES. [2023-08-31 03:19:40,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238925 conditions, 18185 events. 8569/18185 cut-off events. For 1678894/1678894 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 186623 event pairs, 330 based on Foata normal form. 265/18450 useless extension candidates. Maximal degree in co-relation 234567. Up to 6663 conditions per place. [2023-08-31 03:19:40,325 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 933 selfloop transitions, 1656 changer transitions 93/2682 dead transitions. [2023-08-31 03:19:40,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 2682 transitions, 90759 flow [2023-08-31 03:19:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-31 03:19:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-31 03:19:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2582 transitions. [2023-08-31 03:19:40,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329309188464118 [2023-08-31 03:19:40,328 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2582 transitions. [2023-08-31 03:19:40,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2582 transitions. [2023-08-31 03:19:40,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:19:40,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2582 transitions. [2023-08-31 03:19:40,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 61.476190476190474) internal successors, (2582), 42 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:19:40,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:19:40,333 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:19:40,333 INFO L175 Difference]: Start difference. First operand has 537 places, 2065 transitions, 66855 flow. Second operand 42 states and 2582 transitions. [2023-08-31 03:19:40,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 2682 transitions, 90759 flow [2023-08-31 03:20:10,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 2682 transitions, 86878 flow, removed 1296 selfloop flow, removed 15 redundant places. [2023-08-31 03:20:10,761 INFO L231 Difference]: Finished difference. Result has 578 places, 2426 transitions, 82113 flow [2023-08-31 03:20:10,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=63738, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=82113, PETRI_PLACES=578, PETRI_TRANSITIONS=2426} [2023-08-31 03:20:10,764 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 558 predicate places. [2023-08-31 03:20:10,764 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 2426 transitions, 82113 flow [2023-08-31 03:20:10,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 57.88) internal successors, (1447), 25 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:10,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:20:10,764 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:20:10,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 03:20:10,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 03:20:10,970 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:20:10,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:20:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1918400809, now seen corresponding path program 21 times [2023-08-31 03:20:10,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:20:10,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015544977] [2023-08-31 03:20:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:20:10,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:20:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:20:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:11,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:20:11,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015544977] [2023-08-31 03:20:11,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015544977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:20:11,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285552391] [2023-08-31 03:20:11,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:20:11,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:20:11,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:20:11,211 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:20:11,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 03:20:11,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:20:11,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:20:11,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 03:20:11,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:20:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:11,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:20:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:20:11,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285552391] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:20:11,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:20:11,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-31 03:20:11,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565938615] [2023-08-31 03:20:11,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:20:11,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:20:11,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:20:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:20:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:20:12,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-31 03:20:12,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 2426 transitions, 82113 flow. Second operand has 22 states, 22 states have (on average 57.72727272727273) internal successors, (1270), 22 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:12,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:20:12,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-31 03:20:12,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:20:29,460 INFO L130 PetriNetUnfolder]: 8509/17927 cut-off events. [2023-08-31 03:20:29,460 INFO L131 PetriNetUnfolder]: For 1728022/1728022 co-relation queries the response was YES. [2023-08-31 03:20:29,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248195 conditions, 17927 events. 8509/17927 cut-off events. For 1728022/1728022 co-relation queries the response was YES. Maximal size of possible extension queue 1516. Compared 182530 event pairs, 1271 based on Foata normal form. 103/18030 useless extension candidates. Maximal degree in co-relation 243425. Up to 14150 conditions per place. [2023-08-31 03:20:29,869 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 2244 selfloop transitions, 545 changer transitions 15/2804 dead transitions. [2023-08-31 03:20:29,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 2804 transitions, 97074 flow [2023-08-31 03:20:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 03:20:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 03:20:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3028 transitions. [2023-08-31 03:20:29,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43518252371371086 [2023-08-31 03:20:29,873 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3028 transitions. [2023-08-31 03:20:29,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3028 transitions. [2023-08-31 03:20:29,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:20:29,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3028 transitions. [2023-08-31 03:20:29,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 61.795918367346935) internal successors, (3028), 49 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:29,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 142.0) internal successors, (7100), 50 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:29,882 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 142.0) internal successors, (7100), 50 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:20:29,882 INFO L175 Difference]: Start difference. First operand has 578 places, 2426 transitions, 82113 flow. Second operand 49 states and 3028 transitions. [2023-08-31 03:20:29,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 2804 transitions, 97074 flow [2023-08-31 03:21:11,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 2804 transitions, 94309 flow, removed 1316 selfloop flow, removed 20 redundant places. [2023-08-31 03:21:11,428 INFO L231 Difference]: Finished difference. Result has 620 places, 2540 transitions, 85549 flow [2023-08-31 03:21:11,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=79468, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1894, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=85549, PETRI_PLACES=620, PETRI_TRANSITIONS=2540} [2023-08-31 03:21:11,430 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 600 predicate places. [2023-08-31 03:21:11,430 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 2540 transitions, 85549 flow [2023-08-31 03:21:11,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.72727272727273) internal successors, (1270), 22 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:21:11,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:21:11,431 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:21:11,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 03:21:11,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:11,637 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:21:11,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:21:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1553603635, now seen corresponding path program 22 times [2023-08-31 03:21:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:21:11,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964714340] [2023-08-31 03:21:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:21:11,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:21:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:21:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:11,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:21:11,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964714340] [2023-08-31 03:21:11,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964714340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:21:11,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773981700] [2023-08-31 03:21:11,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:21:11,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:21:11,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:21:11,913 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:21:11,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 03:21:11,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:21:11,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:21:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 03:21:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:21:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:21:12,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:21:31,147 WARN L222 SmtUtils]: Spent 11.97s on a formula simplification. DAG size of input: 1128 DAG size of output: 1080 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15