./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/32_pthread5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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 ../sv-benchmarks/c/pthread-ext/32_pthread5_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a1dca423de1ee0965d72c4be0ada5e821e4dbfc023ab1c498b90df0e18b4c1f3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:42:59,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:42:59,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:42:59,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:42:59,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:42:59,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:42:59,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:42:59,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:42:59,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:42:59,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:42:59,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:42:59,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:42:59,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:42:59,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:42:59,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:42:59,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:42:59,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:42:59,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:42:59,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:42:59,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:42:59,838 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:42:59,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:42:59,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:42:59,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:42:59,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:42:59,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:42:59,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:42:59,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:42:59,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:42:59,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:42:59,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:42:59,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:42:59,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:42:59,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:42:59,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:42:59,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:42:59,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:42:59,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:42:59,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:42:59,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:42:59,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:42:59,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:42:59,861 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:42:59,885 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:42:59,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:42:59,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:42:59,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:42:59,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:42:59,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:42:59,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:42:59,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:42:59,887 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:42:59,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:42:59,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:42:59,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:42:59,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:42:59,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:42:59,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:42:59,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:42:59,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:42:59,889 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:42:59,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:42:59,889 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:42:59,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:42:59,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:42:59,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:42:59,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:42:59,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:42:59,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:42:59,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:42:59,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:42:59,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:42:59,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:42:59,891 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:42:59,891 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:42:59,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:42:59,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1dca423de1ee0965d72c4be0ada5e821e4dbfc023ab1c498b90df0e18b4c1f3 [2022-07-13 21:43:00,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:43:00,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:43:00,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:43:00,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:43:00,177 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:43:00,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/32_pthread5_vs.i [2022-07-13 21:43:00,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d1c1fe0/c1df7fa9378a4efcaf036bf80e7ffafc/FLAG3f8ab8e88 [2022-07-13 21:43:00,636 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:43:00,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/32_pthread5_vs.i [2022-07-13 21:43:00,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d1c1fe0/c1df7fa9378a4efcaf036bf80e7ffafc/FLAG3f8ab8e88 [2022-07-13 21:43:00,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d1c1fe0/c1df7fa9378a4efcaf036bf80e7ffafc [2022-07-13 21:43:00,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:43:00,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:43:00,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:43:00,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:43:00,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:43:00,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:43:00" (1/1) ... [2022-07-13 21:43:00,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9077a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:00, skipping insertion in model container [2022-07-13 21:43:00,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:43:00" (1/1) ... [2022-07-13 21:43:00,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:43:00,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:43:00,957 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/32_pthread5_vs.i[30454,30467] [2022-07-13 21:43:00,962 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/32_pthread5_vs.i[30634,30647] [2022-07-13 21:43:00,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:43:00,983 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:43:01,026 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/32_pthread5_vs.i[30454,30467] [2022-07-13 21:43:01,027 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/32_pthread5_vs.i[30634,30647] [2022-07-13 21:43:01,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:43:01,065 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:43:01,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01 WrapperNode [2022-07-13 21:43:01,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:43:01,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:43:01,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:43:01,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:43:01,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,113 INFO L137 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 12, calls inlined = 18, statements flattened = 128 [2022-07-13 21:43:01,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:43:01,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:43:01,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:43:01,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:43:01,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:43:01,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:43:01,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:43:01,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:43:01,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (1/1) ... [2022-07-13 21:43:01,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:43:01,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:43:01,200 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) [2022-07-13 21:43:01,216 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 [2022-07-13 21:43:01,246 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-13 21:43:01,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-13 21:43:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure thr3 [2022-07-13 21:43:01,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thr3 [2022-07-13 21:43:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-13 21:43:01,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-13 21:43:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:43:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:43:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:43:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:43:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:43:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:43:01,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:43:01,251 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:43:01,370 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:43:01,373 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:43:01,570 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:43:01,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:43:01,636 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 21:43:01,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:43:01 BoogieIcfgContainer [2022-07-13 21:43:01,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:43:01,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:43:01,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:43:01,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:43:01,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:43:00" (1/3) ... [2022-07-13 21:43:01,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305e949f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:43:01, skipping insertion in model container [2022-07-13 21:43:01,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:01" (2/3) ... [2022-07-13 21:43:01,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305e949f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:43:01, skipping insertion in model container [2022-07-13 21:43:01,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:43:01" (3/3) ... [2022-07-13 21:43:01,647 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_pthread5_vs.i [2022-07-13 21:43:01,651 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:43:01,658 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:43:01,658 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:43:01,658 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:43:01,698 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:43:01,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 93 places, 91 transitions, 197 flow [2022-07-13 21:43:01,759 INFO L129 PetriNetUnfolder]: 8/100 cut-off events. [2022-07-13 21:43:01,760 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:43:01,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 100 events. 8/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-07-13 21:43:01,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 91 transitions, 197 flow [2022-07-13 21:43:01,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 89 transitions, 189 flow [2022-07-13 21:43:01,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:43:01,795 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f19025e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f2f08a [2022-07-13 21:43:01,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-13 21:43:01,822 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2022-07-13 21:43:01,822 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:43:01,822 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:01,823 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:01,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:43:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:01,830 INFO L85 PathProgramCache]: Analyzing trace with hash 542323430, now seen corresponding path program 1 times [2022-07-13 21:43:01,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:01,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171539271] [2022-07-13 21:43:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:01,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:02,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:02,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171539271] [2022-07-13 21:43:02,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171539271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:02,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:02,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:43:02,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487593357] [2022-07-13 21:43:02,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:02,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:43:02,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:02,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:43:02,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:43:02,179 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 91 [2022-07-13 21:43:02,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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) [2022-07-13 21:43:02,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:02,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 91 [2022-07-13 21:43:02,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:02,637 INFO L129 PetriNetUnfolder]: 769/1730 cut-off events. [2022-07-13 21:43:02,638 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-07-13 21:43:02,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 1730 events. 769/1730 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12215 event pairs, 147 based on Foata normal form. 773/2393 useless extension candidates. Maximal degree in co-relation 3020. Up to 427 conditions per place. [2022-07-13 21:43:02,680 INFO L132 encePairwiseOnDemand]: 76/91 looper letters, 48 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2022-07-13 21:43:02,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 366 flow [2022-07-13 21:43:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:43:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:43:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 398 transitions. [2022-07-13 21:43:02,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8747252747252747 [2022-07-13 21:43:02,695 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 398 transitions. [2022-07-13 21:43:02,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 398 transitions. [2022-07-13 21:43:02,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:02,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 398 transitions. [2022-07-13 21:43:02,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 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) [2022-07-13 21:43:02,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 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) [2022-07-13 21:43:02,709 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 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) [2022-07-13 21:43:02,710 INFO L186 Difference]: Start difference. First operand has 91 places, 89 transitions, 189 flow. Second operand 5 states and 398 transitions. [2022-07-13 21:43:02,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 366 flow [2022-07-13 21:43:02,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 21:43:02,718 INFO L242 Difference]: Finished difference. Result has 86 places, 83 transitions, 247 flow [2022-07-13 21:43:02,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2022-07-13 21:43:02,723 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, -5 predicate places. [2022-07-13 21:43:02,723 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 247 flow [2022-07-13 21:43:02,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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) [2022-07-13 21:43:02,724 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:02,724 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:02,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:43:02,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:43:02,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:02,726 INFO L85 PathProgramCache]: Analyzing trace with hash 53511059, now seen corresponding path program 1 times [2022-07-13 21:43:02,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:02,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912271990] [2022-07-13 21:43:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:02,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:02,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:02,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912271990] [2022-07-13 21:43:02,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912271990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:02,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:02,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:43:02,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869248276] [2022-07-13 21:43:02,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:02,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:43:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:02,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:43:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:43:02,822 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 91 [2022-07-13 21:43:02,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 62.5) internal successors, (375), 6 states have internal predecessors, (375), 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) [2022-07-13 21:43:02,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:02,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 91 [2022-07-13 21:43:02,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:03,084 INFO L129 PetriNetUnfolder]: 337/1034 cut-off events. [2022-07-13 21:43:03,084 INFO L130 PetriNetUnfolder]: For 329/335 co-relation queries the response was YES. [2022-07-13 21:43:03,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 1034 events. 337/1034 cut-off events. For 329/335 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6822 event pairs, 63 based on Foata normal form. 93/1079 useless extension candidates. Maximal degree in co-relation 2031. Up to 159 conditions per place. [2022-07-13 21:43:03,093 INFO L132 encePairwiseOnDemand]: 75/91 looper letters, 48 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2022-07-13 21:43:03,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 128 transitions, 522 flow [2022-07-13 21:43:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:43:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:43:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 572 transitions. [2022-07-13 21:43:03,098 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-07-13 21:43:03,098 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 572 transitions. [2022-07-13 21:43:03,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 572 transitions. [2022-07-13 21:43:03,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:03,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 572 transitions. [2022-07-13 21:43:03,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.5) internal successors, (572), 8 states have internal predecessors, (572), 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) [2022-07-13 21:43:03,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 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) [2022-07-13 21:43:03,104 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 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) [2022-07-13 21:43:03,104 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 247 flow. Second operand 8 states and 572 transitions. [2022-07-13 21:43:03,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 128 transitions, 522 flow [2022-07-13 21:43:03,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 128 transitions, 518 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-07-13 21:43:03,111 INFO L242 Difference]: Finished difference. Result has 98 places, 100 transitions, 440 flow [2022-07-13 21:43:03,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=440, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2022-07-13 21:43:03,112 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2022-07-13 21:43:03,112 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 440 flow [2022-07-13 21:43:03,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.5) internal successors, (375), 6 states have internal predecessors, (375), 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) [2022-07-13 21:43:03,113 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:03,113 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:03,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:43:03,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:43:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1259715748, now seen corresponding path program 1 times [2022-07-13 21:43:03,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:03,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027515992] [2022-07-13 21:43:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:03,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:03,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027515992] [2022-07-13 21:43:03,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027515992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:03,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:03,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:43:03,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454063395] [2022-07-13 21:43:03,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:03,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:43:03,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:03,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:43:03,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:43:03,200 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 91 [2022-07-13 21:43:03,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:43:03,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:03,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 91 [2022-07-13 21:43:03,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:03,389 INFO L129 PetriNetUnfolder]: 298/943 cut-off events. [2022-07-13 21:43:03,390 INFO L130 PetriNetUnfolder]: For 1495/1529 co-relation queries the response was YES. [2022-07-13 21:43:03,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2986 conditions, 943 events. 298/943 cut-off events. For 1495/1529 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6091 event pairs, 91 based on Foata normal form. 28/912 useless extension candidates. Maximal degree in co-relation 2941. Up to 320 conditions per place. [2022-07-13 21:43:03,400 INFO L132 encePairwiseOnDemand]: 84/91 looper letters, 59 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2022-07-13 21:43:03,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 124 transitions, 737 flow [2022-07-13 21:43:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:43:03,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:43:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 360 transitions. [2022-07-13 21:43:03,403 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912087912087912 [2022-07-13 21:43:03,403 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 360 transitions. [2022-07-13 21:43:03,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 360 transitions. [2022-07-13 21:43:03,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:03,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 360 transitions. [2022-07-13 21:43:03,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 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) [2022-07-13 21:43:03,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 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) [2022-07-13 21:43:03,406 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 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) [2022-07-13 21:43:03,406 INFO L186 Difference]: Start difference. First operand has 98 places, 100 transitions, 440 flow. Second operand 5 states and 360 transitions. [2022-07-13 21:43:03,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 124 transitions, 737 flow [2022-07-13 21:43:03,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 124 transitions, 730 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-13 21:43:03,415 INFO L242 Difference]: Finished difference. Result has 103 places, 102 transitions, 496 flow [2022-07-13 21:43:03,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=103, PETRI_TRANSITIONS=102} [2022-07-13 21:43:03,417 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 12 predicate places. [2022-07-13 21:43:03,417 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 102 transitions, 496 flow [2022-07-13 21:43:03,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:43:03,417 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:03,418 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:03,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:43:03,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:43:03,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1826699581, now seen corresponding path program 1 times [2022-07-13 21:43:03,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:03,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580741491] [2022-07-13 21:43:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:03,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:03,453 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:43:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:03,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:43:03,504 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:43:03,505 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-13 21:43:03,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-13 21:43:03,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-13 21:43:03,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-07-13 21:43:03,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-07-13 21:43:03,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-13 21:43:03,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-13 21:43:03,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:43:03,512 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:43:03,515 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:43:03,516 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:43:03,561 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:43:03,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 138 transitions, 312 flow [2022-07-13 21:43:03,584 INFO L129 PetriNetUnfolder]: 12/137 cut-off events. [2022-07-13 21:43:03,585 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:43:03,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 137 events. 12/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 284 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 148. Up to 6 conditions per place. [2022-07-13 21:43:03,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 138 transitions, 312 flow [2022-07-13 21:43:03,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 113 transitions, 244 flow [2022-07-13 21:43:03,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:43:03,598 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f19025e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f2f08a [2022-07-13 21:43:03,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-13 21:43:03,602 INFO L129 PetriNetUnfolder]: 4/55 cut-off events. [2022-07-13 21:43:03,603 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:43:03,603 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:03,604 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:03,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-13 21:43:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash 242664739, now seen corresponding path program 1 times [2022-07-13 21:43:03,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:03,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274697229] [2022-07-13 21:43:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:03,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:03,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:03,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274697229] [2022-07-13 21:43:03,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274697229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:03,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:03,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:43:03,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288395403] [2022-07-13 21:43:03,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:03,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:43:03,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:03,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:43:03,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:43:03,678 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 138 [2022-07-13 21:43:03,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 113 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 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) [2022-07-13 21:43:03,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:03,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 138 [2022-07-13 21:43:03,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:06,298 INFO L129 PetriNetUnfolder]: 11938/22343 cut-off events. [2022-07-13 21:43:06,298 INFO L130 PetriNetUnfolder]: For 1367/1367 co-relation queries the response was YES. [2022-07-13 21:43:06,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40255 conditions, 22343 events. 11938/22343 cut-off events. For 1367/1367 co-relation queries the response was YES. Maximal size of possible extension queue 1214. Compared 212384 event pairs, 3227 based on Foata normal form. 8105/28466 useless extension candidates. Maximal degree in co-relation 40222. Up to 5309 conditions per place. [2022-07-13 21:43:06,585 INFO L132 encePairwiseOnDemand]: 119/138 looper letters, 79 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2022-07-13 21:43:06,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 558 flow [2022-07-13 21:43:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:43:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:43:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 550 transitions. [2022-07-13 21:43:06,587 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7971014492753623 [2022-07-13 21:43:06,588 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 550 transitions. [2022-07-13 21:43:06,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 550 transitions. [2022-07-13 21:43:06,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:06,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 550 transitions. [2022-07-13 21:43:06,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 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) [2022-07-13 21:43:06,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 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) [2022-07-13 21:43:06,593 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 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) [2022-07-13 21:43:06,593 INFO L186 Difference]: Start difference. First operand has 114 places, 113 transitions, 244 flow. Second operand 5 states and 550 transitions. [2022-07-13 21:43:06,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 558 flow [2022-07-13 21:43:06,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 162 transitions, 553 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-13 21:43:06,598 INFO L242 Difference]: Finished difference. Result has 108 places, 110 transitions, 342 flow [2022-07-13 21:43:06,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=342, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2022-07-13 21:43:06,600 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -6 predicate places. [2022-07-13 21:43:06,600 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 342 flow [2022-07-13 21:43:06,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 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) [2022-07-13 21:43:06,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:06,601 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:43:06,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-13 21:43:06,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash 39245840, now seen corresponding path program 1 times [2022-07-13 21:43:06,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:06,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080369839] [2022-07-13 21:43:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:06,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:06,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:06,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080369839] [2022-07-13 21:43:06,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080369839] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:06,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:06,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:43:06,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656700058] [2022-07-13 21:43:06,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:06,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:43:06,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:06,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:43:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:43:06,704 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 138 [2022-07-13 21:43:06,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 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) [2022-07-13 21:43:06,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:06,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 138 [2022-07-13 21:43:06,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:07,072 INFO L129 PetriNetUnfolder]: 360/1752 cut-off events. [2022-07-13 21:43:07,072 INFO L130 PetriNetUnfolder]: For 717/717 co-relation queries the response was YES. [2022-07-13 21:43:07,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1752 events. 360/1752 cut-off events. For 717/717 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 15605 event pairs, 43 based on Foata normal form. 855/2476 useless extension candidates. Maximal degree in co-relation 3553. Up to 252 conditions per place. [2022-07-13 21:43:07,088 INFO L132 encePairwiseOnDemand]: 116/138 looper letters, 43 selfloop transitions, 54 changer transitions 0/162 dead transitions. [2022-07-13 21:43:07,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 162 transitions, 702 flow [2022-07-13 21:43:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:43:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:43:07,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 866 transitions. [2022-07-13 21:43:07,092 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6972624798711755 [2022-07-13 21:43:07,092 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 866 transitions. [2022-07-13 21:43:07,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 866 transitions. [2022-07-13 21:43:07,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:07,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 866 transitions. [2022-07-13 21:43:07,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.22222222222223) internal successors, (866), 9 states have internal predecessors, (866), 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) [2022-07-13 21:43:07,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 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) [2022-07-13 21:43:07,098 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 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) [2022-07-13 21:43:07,098 INFO L186 Difference]: Start difference. First operand has 108 places, 110 transitions, 342 flow. Second operand 9 states and 866 transitions. [2022-07-13 21:43:07,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 162 transitions, 702 flow [2022-07-13 21:43:07,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 162 transitions, 679 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-13 21:43:07,111 INFO L242 Difference]: Finished difference. Result has 117 places, 138 transitions, 521 flow [2022-07-13 21:43:07,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=521, PETRI_PLACES=117, PETRI_TRANSITIONS=138} [2022-07-13 21:43:07,115 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 3 predicate places. [2022-07-13 21:43:07,115 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 138 transitions, 521 flow [2022-07-13 21:43:07,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 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) [2022-07-13 21:43:07,116 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:07,116 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:07,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:43:07,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-13 21:43:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1938697959, now seen corresponding path program 1 times [2022-07-13 21:43:07,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:07,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194531013] [2022-07-13 21:43:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:07,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:07,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:07,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194531013] [2022-07-13 21:43:07,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194531013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:07,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:07,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:43:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943084408] [2022-07-13 21:43:07,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:07,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:43:07,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:07,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:43:07,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:43:07,160 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 138 [2022-07-13 21:43:07,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 138 transitions, 521 flow. Second operand has 4 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 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) [2022-07-13 21:43:07,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:07,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 138 [2022-07-13 21:43:07,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:07,468 INFO L129 PetriNetUnfolder]: 390/1860 cut-off events. [2022-07-13 21:43:07,468 INFO L130 PetriNetUnfolder]: For 1249/1250 co-relation queries the response was YES. [2022-07-13 21:43:07,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4628 conditions, 1860 events. 390/1860 cut-off events. For 1249/1250 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 16809 event pairs, 58 based on Foata normal form. 36/1749 useless extension candidates. Maximal degree in co-relation 4586. Up to 436 conditions per place. [2022-07-13 21:43:07,489 INFO L132 encePairwiseOnDemand]: 130/138 looper letters, 84 selfloop transitions, 12 changer transitions 0/161 dead transitions. [2022-07-13 21:43:07,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 161 transitions, 840 flow [2022-07-13 21:43:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:43:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:43:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 489 transitions. [2022-07-13 21:43:07,491 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7086956521739131 [2022-07-13 21:43:07,491 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 489 transitions. [2022-07-13 21:43:07,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 489 transitions. [2022-07-13 21:43:07,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:07,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 489 transitions. [2022-07-13 21:43:07,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 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) [2022-07-13 21:43:07,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 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) [2022-07-13 21:43:07,496 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 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) [2022-07-13 21:43:07,497 INFO L186 Difference]: Start difference. First operand has 117 places, 138 transitions, 521 flow. Second operand 5 states and 489 transitions. [2022-07-13 21:43:07,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 161 transitions, 840 flow [2022-07-13 21:43:07,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 161 transitions, 831 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-13 21:43:07,506 INFO L242 Difference]: Finished difference. Result has 121 places, 140 transitions, 589 flow [2022-07-13 21:43:07,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=589, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2022-07-13 21:43:07,508 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2022-07-13 21:43:07,508 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 589 flow [2022-07-13 21:43:07,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 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) [2022-07-13 21:43:07,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:07,509 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:07,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:43:07,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-13 21:43:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:07,510 INFO L85 PathProgramCache]: Analyzing trace with hash 603770055, now seen corresponding path program 1 times [2022-07-13 21:43:07,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:07,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544819271] [2022-07-13 21:43:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:07,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:07,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:07,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544819271] [2022-07-13 21:43:07,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544819271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:07,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:07,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:43:07,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483928140] [2022-07-13 21:43:07,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:07,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:43:07,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:07,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:43:07,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:43:07,566 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 138 [2022-07-13 21:43:07,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 589 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-07-13 21:43:07,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:07,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 138 [2022-07-13 21:43:07,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:07,955 INFO L129 PetriNetUnfolder]: 856/3296 cut-off events. [2022-07-13 21:43:07,956 INFO L130 PetriNetUnfolder]: For 2316/2319 co-relation queries the response was YES. [2022-07-13 21:43:07,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8065 conditions, 3296 events. 856/3296 cut-off events. For 2316/2319 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 32028 event pairs, 162 based on Foata normal form. 0/3139 useless extension candidates. Maximal degree in co-relation 8021. Up to 952 conditions per place. [2022-07-13 21:43:07,994 INFO L132 encePairwiseOnDemand]: 132/138 looper letters, 94 selfloop transitions, 4 changer transitions 0/185 dead transitions. [2022-07-13 21:43:07,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 185 transitions, 980 flow [2022-07-13 21:43:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:43:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:43:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 322 transitions. [2022-07-13 21:43:07,996 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-07-13 21:43:07,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 322 transitions. [2022-07-13 21:43:07,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 322 transitions. [2022-07-13 21:43:07,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:07,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 322 transitions. [2022-07-13 21:43:07,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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) [2022-07-13 21:43:07,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 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) [2022-07-13 21:43:07,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 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) [2022-07-13 21:43:07,999 INFO L186 Difference]: Start difference. First operand has 121 places, 140 transitions, 589 flow. Second operand 3 states and 322 transitions. [2022-07-13 21:43:07,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 185 transitions, 980 flow [2022-07-13 21:43:08,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 185 transitions, 972 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-13 21:43:08,014 INFO L242 Difference]: Finished difference. Result has 124 places, 142 transitions, 609 flow [2022-07-13 21:43:08,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=609, PETRI_PLACES=124, PETRI_TRANSITIONS=142} [2022-07-13 21:43:08,015 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 10 predicate places. [2022-07-13 21:43:08,015 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 142 transitions, 609 flow [2022-07-13 21:43:08,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-07-13 21:43:08,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:08,019 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:08,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:43:08,019 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-13 21:43:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:08,020 INFO L85 PathProgramCache]: Analyzing trace with hash 345022202, now seen corresponding path program 1 times [2022-07-13 21:43:08,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:08,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482879493] [2022-07-13 21:43:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:08,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:08,050 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:43:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:08,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:43:08,070 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:43:08,070 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-07-13 21:43:08,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-07-13 21:43:08,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-07-13 21:43:08,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 9 remaining) [2022-07-13 21:43:08,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 9 remaining) [2022-07-13 21:43:08,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-07-13 21:43:08,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-07-13 21:43:08,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-07-13 21:43:08,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-07-13 21:43:08,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:43:08,075 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:43:08,077 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:43:08,077 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:43:08,117 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:43:08,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 187 places, 185 transitions, 433 flow [2022-07-13 21:43:08,140 INFO L129 PetriNetUnfolder]: 16/174 cut-off events. [2022-07-13 21:43:08,141 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:43:08,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 174 events. 16/174 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 404 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2022-07-13 21:43:08,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 185 transitions, 433 flow [2022-07-13 21:43:08,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 137 transitions, 301 flow [2022-07-13 21:43:08,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:43:08,145 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f19025e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f2f08a [2022-07-13 21:43:08,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-13 21:43:08,150 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2022-07-13 21:43:08,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:43:08,150 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:08,150 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:08,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-13 21:43:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 678210754, now seen corresponding path program 1 times [2022-07-13 21:43:08,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:08,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761114641] [2022-07-13 21:43:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:08,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:08,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:08,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761114641] [2022-07-13 21:43:08,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761114641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:08,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:08,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:43:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883777698] [2022-07-13 21:43:08,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:08,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:43:08,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:43:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:43:08,182 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 185 [2022-07-13 21:43:08,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 137 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 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) [2022-07-13 21:43:08,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:08,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 185 [2022-07-13 21:43:08,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:29,824 INFO L129 PetriNetUnfolder]: 156504/249408 cut-off events. [2022-07-13 21:43:29,824 INFO L130 PetriNetUnfolder]: For 26446/26446 co-relation queries the response was YES. [2022-07-13 21:43:31,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 467148 conditions, 249408 events. 156504/249408 cut-off events. For 26446/26446 co-relation queries the response was YES. Maximal size of possible extension queue 10207. Compared 2572867 event pairs, 34322 based on Foata normal form. 83736/313878 useless extension candidates. Maximal degree in co-relation 467114. Up to 62510 conditions per place. [2022-07-13 21:43:33,620 INFO L132 encePairwiseOnDemand]: 162/185 looper letters, 108 selfloop transitions, 22 changer transitions 0/209 dead transitions. [2022-07-13 21:43:33,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 209 transitions, 750 flow [2022-07-13 21:43:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:43:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:43:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2022-07-13 21:43:33,626 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2022-07-13 21:43:33,626 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2022-07-13 21:43:33,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2022-07-13 21:43:33,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:33,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2022-07-13 21:43:33,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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) [2022-07-13 21:43:33,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 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) [2022-07-13 21:43:33,630 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 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) [2022-07-13 21:43:33,631 INFO L186 Difference]: Start difference. First operand has 137 places, 137 transitions, 301 flow. Second operand 5 states and 700 transitions. [2022-07-13 21:43:33,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 209 transitions, 750 flow [2022-07-13 21:43:33,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 209 transitions, 735 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-13 21:43:33,645 INFO L242 Difference]: Finished difference. Result has 130 places, 137 transitions, 435 flow [2022-07-13 21:43:33,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=435, PETRI_PLACES=130, PETRI_TRANSITIONS=137} [2022-07-13 21:43:33,646 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, -7 predicate places. [2022-07-13 21:43:33,647 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 137 transitions, 435 flow [2022-07-13 21:43:33,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 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) [2022-07-13 21:43:33,647 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:33,647 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:33,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:43:33,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-13 21:43:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1142746072, now seen corresponding path program 1 times [2022-07-13 21:43:33,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:33,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325631832] [2022-07-13 21:43:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:33,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:33,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325631832] [2022-07-13 21:43:33,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325631832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:33,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:33,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:43:33,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323224865] [2022-07-13 21:43:33,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:33,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:43:33,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:33,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:43:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:43:33,701 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 185 [2022-07-13 21:43:33,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 137 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 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) [2022-07-13 21:43:33,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:33,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 185 [2022-07-13 21:43:33,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:34,733 INFO L129 PetriNetUnfolder]: 1797/7931 cut-off events. [2022-07-13 21:43:34,733 INFO L130 PetriNetUnfolder]: For 3609/3609 co-relation queries the response was YES. [2022-07-13 21:43:34,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16014 conditions, 7931 events. 1797/7931 cut-off events. For 3609/3609 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 94968 event pairs, 316 based on Foata normal form. 4972/12226 useless extension candidates. Maximal degree in co-relation 15973. Up to 1220 conditions per place. [2022-07-13 21:43:34,787 INFO L132 encePairwiseOnDemand]: 153/185 looper letters, 56 selfloop transitions, 74 changer transitions 0/208 dead transitions. [2022-07-13 21:43:34,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 208 transitions, 934 flow [2022-07-13 21:43:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:43:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:43:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1213 transitions. [2022-07-13 21:43:34,791 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6556756756756756 [2022-07-13 21:43:34,791 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1213 transitions. [2022-07-13 21:43:34,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1213 transitions. [2022-07-13 21:43:34,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:34,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1213 transitions. [2022-07-13 21:43:34,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 121.3) internal successors, (1213), 10 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) [2022-07-13 21:43:34,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 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) [2022-07-13 21:43:34,805 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 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) [2022-07-13 21:43:34,805 INFO L186 Difference]: Start difference. First operand has 130 places, 137 transitions, 435 flow. Second operand 10 states and 1213 transitions. [2022-07-13 21:43:34,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 208 transitions, 934 flow [2022-07-13 21:43:34,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 208 transitions, 906 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-07-13 21:43:34,851 INFO L242 Difference]: Finished difference. Result has 141 places, 177 transitions, 713 flow [2022-07-13 21:43:34,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=713, PETRI_PLACES=141, PETRI_TRANSITIONS=177} [2022-07-13 21:43:34,853 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, 4 predicate places. [2022-07-13 21:43:34,853 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 177 transitions, 713 flow [2022-07-13 21:43:34,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 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) [2022-07-13 21:43:34,854 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:34,854 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:34,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:43:34,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-13 21:43:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:34,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1161603247, now seen corresponding path program 1 times [2022-07-13 21:43:34,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:34,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949449108] [2022-07-13 21:43:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:34,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:34,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:34,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949449108] [2022-07-13 21:43:34,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949449108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:34,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:34,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:43:34,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952964509] [2022-07-13 21:43:34,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:34,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:43:34,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:34,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:43:34,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:43:34,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 185 [2022-07-13 21:43:34,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 177 transitions, 713 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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) [2022-07-13 21:43:34,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:34,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 185 [2022-07-13 21:43:34,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:35,783 INFO L129 PetriNetUnfolder]: 2005/8924 cut-off events. [2022-07-13 21:43:35,783 INFO L130 PetriNetUnfolder]: For 7235/7241 co-relation queries the response was YES. [2022-07-13 21:43:35,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21980 conditions, 8924 events. 2005/8924 cut-off events. For 7235/7241 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 109022 event pairs, 536 based on Foata normal form. 109/8219 useless extension candidates. Maximal degree in co-relation 21936. Up to 2282 conditions per place. [2022-07-13 21:43:35,842 INFO L132 encePairwiseOnDemand]: 175/185 looper letters, 116 selfloop transitions, 15 changer transitions 0/209 dead transitions. [2022-07-13 21:43:35,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 209 transitions, 1159 flow [2022-07-13 21:43:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:43:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:43:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 623 transitions. [2022-07-13 21:43:35,844 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6735135135135135 [2022-07-13 21:43:35,844 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 623 transitions. [2022-07-13 21:43:35,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 623 transitions. [2022-07-13 21:43:35,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:35,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 623 transitions. [2022-07-13 21:43:35,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 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) [2022-07-13 21:43:35,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 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) [2022-07-13 21:43:35,848 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 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) [2022-07-13 21:43:35,849 INFO L186 Difference]: Start difference. First operand has 141 places, 177 transitions, 713 flow. Second operand 5 states and 623 transitions. [2022-07-13 21:43:35,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 209 transitions, 1159 flow [2022-07-13 21:43:35,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 209 transitions, 1145 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-07-13 21:43:35,901 INFO L242 Difference]: Finished difference. Result has 144 places, 180 transitions, 800 flow [2022-07-13 21:43:35,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=800, PETRI_PLACES=144, PETRI_TRANSITIONS=180} [2022-07-13 21:43:35,902 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, 7 predicate places. [2022-07-13 21:43:35,902 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 180 transitions, 800 flow [2022-07-13 21:43:35,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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) [2022-07-13 21:43:35,902 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:35,902 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:35,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:43:35,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-13 21:43:35,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1713401640, now seen corresponding path program 1 times [2022-07-13 21:43:35,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176686453] [2022-07-13 21:43:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:43:35,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176686453] [2022-07-13 21:43:35,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176686453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:35,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:35,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:43:35,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060074751] [2022-07-13 21:43:35,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:35,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:43:35,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:35,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:43:35,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:43:35,935 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 185 [2022-07-13 21:43:35,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 180 transitions, 800 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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) [2022-07-13 21:43:35,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:35,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 185 [2022-07-13 21:43:35,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:37,306 INFO L129 PetriNetUnfolder]: 4495/15815 cut-off events. [2022-07-13 21:43:37,306 INFO L130 PetriNetUnfolder]: For 11889/11890 co-relation queries the response was YES. [2022-07-13 21:43:37,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38664 conditions, 15815 events. 4495/15815 cut-off events. For 11889/11890 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 201718 event pairs, 805 based on Foata normal form. 0/15063 useless extension candidates. Maximal degree in co-relation 38619. Up to 4656 conditions per place. [2022-07-13 21:43:37,430 INFO L132 encePairwiseOnDemand]: 177/185 looper letters, 132 selfloop transitions, 5 changer transitions 0/244 dead transitions. [2022-07-13 21:43:37,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 244 transitions, 1366 flow [2022-07-13 21:43:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:43:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:43:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2022-07-13 21:43:37,433 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7495495495495496 [2022-07-13 21:43:37,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2022-07-13 21:43:37,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2022-07-13 21:43:37,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:37,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2022-07-13 21:43:37,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2022-07-13 21:43:37,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-13 21:43:37,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-13 21:43:37,436 INFO L186 Difference]: Start difference. First operand has 144 places, 180 transitions, 800 flow. Second operand 3 states and 416 transitions. [2022-07-13 21:43:37,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 244 transitions, 1366 flow [2022-07-13 21:43:37,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 244 transitions, 1315 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-13 21:43:37,502 INFO L242 Difference]: Finished difference. Result has 146 places, 183 transitions, 801 flow [2022-07-13 21:43:37,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=801, PETRI_PLACES=146, PETRI_TRANSITIONS=183} [2022-07-13 21:43:37,503 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, 9 predicate places. [2022-07-13 21:43:37,503 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 183 transitions, 801 flow [2022-07-13 21:43:37,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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) [2022-07-13 21:43:37,503 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:37,503 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:43:37,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:43:37,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-13 21:43:37,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1878098968, now seen corresponding path program 1 times [2022-07-13 21:43:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:37,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400162873] [2022-07-13 21:43:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:37,527 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:43:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:37,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:43:37,553 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:43:37,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (10 of 11 remaining) [2022-07-13 21:43:37,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (9 of 11 remaining) [2022-07-13 21:43:37,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2022-07-13 21:43:37,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 11 remaining) [2022-07-13 21:43:37,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 11 remaining) [2022-07-13 21:43:37,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 11 remaining) [2022-07-13 21:43:37,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2022-07-13 21:43:37,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 11 remaining) [2022-07-13 21:43:37,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2022-07-13 21:43:37,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2022-07-13 21:43:37,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2022-07-13 21:43:37,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:43:37,556 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:43:37,560 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 3 thread instances [2022-07-13 21:43:37,561 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 21:43:37,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 09:43:37 BasicIcfg [2022-07-13 21:43:37,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 21:43:37,645 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 21:43:37,645 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 21:43:37,645 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 21:43:37,646 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:43:01" (3/4) ... [2022-07-13 21:43:37,647 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-13 21:43:37,712 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 21:43:37,712 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 21:43:37,712 INFO L158 Benchmark]: Toolchain (without parser) took 37037.83ms. Allocated memory was 90.2MB in the beginning and 14.1GB in the end (delta: 14.0GB). Free memory was 49.4MB in the beginning and 11.7GB in the end (delta: -11.7GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. [2022-07-13 21:43:37,713 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 90.2MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:43:37,713 INFO L158 Benchmark]: CACSL2BoogieTranslator took 389.24ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 49.2MB in the beginning and 75.9MB in the end (delta: -26.7MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2022-07-13 21:43:37,713 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.68ms. Allocated memory is still 109.1MB. Free memory was 75.9MB in the beginning and 73.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:43:37,714 INFO L158 Benchmark]: Boogie Preprocessor took 54.66ms. Allocated memory is still 109.1MB. Free memory was 73.5MB in the beginning and 71.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:43:37,714 INFO L158 Benchmark]: RCFGBuilder took 467.87ms. Allocated memory is still 109.1MB. Free memory was 71.7MB in the beginning and 53.4MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-13 21:43:37,714 INFO L158 Benchmark]: TraceAbstraction took 36004.96ms. Allocated memory was 109.1MB in the beginning and 14.1GB in the end (delta: 14.0GB). Free memory was 52.8MB in the beginning and 11.7GB in the end (delta: -11.7GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. [2022-07-13 21:43:37,714 INFO L158 Benchmark]: Witness Printer took 67.19ms. Allocated memory is still 14.1GB. Free memory was 11.7GB in the beginning and 11.7GB in the end (delta: 21.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-13 21:43:37,717 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 90.2MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 389.24ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 49.2MB in the beginning and 75.9MB in the end (delta: -26.7MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.68ms. Allocated memory is still 109.1MB. Free memory was 75.9MB in the beginning and 73.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.66ms. Allocated memory is still 109.1MB. Free memory was 73.5MB in the beginning and 71.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 467.87ms. Allocated memory is still 109.1MB. Free memory was 71.7MB in the beginning and 53.4MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 36004.96ms. Allocated memory was 109.1MB in the beginning and 14.1GB in the end (delta: 14.0GB). Free memory was 52.8MB in the beginning and 11.7GB in the end (delta: -11.7GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. * Witness Printer took 67.19ms. Allocated memory is still 14.1GB. Free memory was 11.7GB in the beginning and 11.7GB in the end (delta: 21.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 716]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L689] 0 int g0 = 0,g1 = 0,x = 0; VAL [g0=0, g1=0, x=0] [L690] 0 _Bool lock = 0; VAL [g0=0, g1=0, lock=0, x=0] [L691] 0 int mutex = 0; VAL [g0=0, g1=0, lock=0, mutex=0, x=0] [L735] 0 pthread_t t; VAL [g0=0, g1=0, lock=0, mutex=0, t={3:0}, x=0] [L736] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [g0=0, g1=0, lock=0, mutex=0, pthread_create(&t, 0, thr1, 0)=-2, t={3:0}, x=0] [L737] FCALL, FORK 0 pthread_create(&t, 0, thr2, 0) VAL [g0=0, g1=0, lock=0, mutex=0, pthread_create(&t, 0, thr2, 0)=-1, t={3:0}, x=0] [L738] COND TRUE 0 1 VAL [g0=0, g1=0, lock=0, mutex=0, t={3:0}, x=0] [L740] FCALL, FORK 0 pthread_create(&t, 0, thr3, 0) VAL [g0=0, g1=0, lock=0, mutex=0, pthread_create(&t, 0, thr3, 0)=0, t={3:0}, x=0] [L728] CALL 1 __VERIFIER_atomic_acquire() [L694] CALL 1 assume_abort_if_not(mutex==0) [L4] COND FALSE 1 !(!cond) [L694] RET 1 assume_abort_if_not(mutex==0) [L695] 1 mutex = 1 [L728] RET 1 __VERIFIER_atomic_acquire() [L729] 1 g0=1 VAL [arg={0:0}, arg={0:0}, g0=1, g1=0, lock=0, mutex=1, x=0] [L729] 1 g1=1 VAL [arg={0:0}, arg={0:0}, g0=1, g1=1, lock=0, mutex=1, x=0] [L730] CALL 1 __VERIFIER_atomic_release() [L699] CALL 1 assume_abort_if_not(mutex==1) [L4] COND FALSE 1 !(!cond) [L699] RET 1 assume_abort_if_not(mutex==1) [L700] 1 mutex = 0 [L730] RET 1 __VERIFIER_atomic_release() [L704] CALL 3 __VERIFIER_atomic_acquire() [L694] CALL 3 assume_abort_if_not(mutex==0) [L4] COND FALSE 3 !(!cond) [L694] RET 3 assume_abort_if_not(mutex==0) [L695] 3 mutex = 1 [L704] RET 3 __VERIFIER_atomic_acquire() [L705] COND TRUE 3 __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, arg={0:0}, arg={0:0}, g0=1, g1=1, lock=0, mutex=1, x=0] [L707] 3 g0=0 VAL [arg={0:0}, arg={0:0}, g0=0, g1=1, lock=0, mutex=1, x=0] [L708] 3 g1=0 VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=0, mutex=1, x=0] [L709] 3 lock=0 VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=0, mutex=1, x=0] [L711] CALL 3 __VERIFIER_atomic_release() [L699] CALL 3 assume_abort_if_not(mutex==1) [L4] COND FALSE 3 !(!cond) [L699] RET 3 assume_abort_if_not(mutex==1) [L700] 3 mutex = 0 [L711] RET 3 __VERIFIER_atomic_release() [L712] CALL 3 __VERIFIER_atomic_acquire() [L694] CALL 3 assume_abort_if_not(mutex==0) [L4] COND FALSE 3 !(!cond) [L694] RET 3 assume_abort_if_not(mutex==0) [L695] 3 mutex = 1 [L712] RET 3 __VERIFIER_atomic_acquire() [L731] 1 lock=1 VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=0] [L713] COND TRUE 3 \read(lock) VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=0] [L715] 3 x=1 VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=1] [L716] COND TRUE 3 !(g0==1 && g1==1) VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=1] [L716] 3 reach_error() VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=1] - UnprovableResult [Line: 723]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 737]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 740]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 736]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 128 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 120 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 120 mSDsluCounter, 56 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 135 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 316 IncrementalHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 36 mSDtfsCounter, 316 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=496occurred in iteration=3, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 225 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 169 locations, 9 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.5s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 192 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 192 mSDsluCounter, 66 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 165 mSDsCounter, 79 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 396 IncrementalHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 79 mSolverCounterUnsat, 49 mSDtfsCounter, 396 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=609occurred in iteration=4, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 397 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 13 procedures, 210 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 29.4s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 29.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 284 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 284 mSDsluCounter, 99 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 271 mSDsCounter, 116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 642 IncrementalHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 116 mSolverCounterUnsat, 67 mSDtfsCounter, 642 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=801occurred in iteration=4, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 321 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-13 21:43:37,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE