./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/04_incdec_cas.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/04_incdec_cas.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 a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:40:49,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:40:49,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:40:49,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:40:49,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:40:49,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:40:49,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:40:49,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:40:49,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:40:49,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:40:49,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:40:49,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:40:49,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:40:49,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:40:49,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:40:49,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:40:49,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:40:49,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:40:49,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:40:49,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:40:49,374 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:40:49,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:40:49,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:40:49,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:40:49,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:40:49,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:40:49,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:40:49,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:40:49,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:40:49,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:40:49,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:40:49,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:40:49,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:40:49,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:40:49,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:40:49,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:40:49,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:40:49,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:40:49,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:40:49,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:40:49,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:40:49,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:40:49,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:40:49,423 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:40:49,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:40:49,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:40:49,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:40:49,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:40:49,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:40:49,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:40:49,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:40:49,426 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:40:49,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:40:49,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:40:49,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:40:49,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:40:49,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:40:49,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:40:49,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:40:49,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:40:49,428 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:40:49,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:40:49,429 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:40:49,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:40:49,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:40:49,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:40:49,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:40:49,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:40:49,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:40:49,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:40:49,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:40:49,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:40:49,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:40:49,431 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:40:49,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:40:49,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:40:49,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b [2022-07-13 21:40:49,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:40:49,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:40:49,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:40:49,698 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:40:49,699 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:40:49,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-07-13 21:40:49,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fb8e9ae/c74a91016b8c46c59faaa2193ae86d4e/FLAG4de4971e9 [2022-07-13 21:40:50,207 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:40:50,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-07-13 21:40:50,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fb8e9ae/c74a91016b8c46c59faaa2193ae86d4e/FLAG4de4971e9 [2022-07-13 21:40:50,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fb8e9ae/c74a91016b8c46c59faaa2193ae86d4e [2022-07-13 21:40:50,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:40:50,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:40:50,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:40:50,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:40:50,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:40:50,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:50,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5024ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50, skipping insertion in model container [2022-07-13 21:40:50,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:50,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:40:50,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:40:50,854 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/04_incdec_cas.i[30285,30298] [2022-07-13 21:40:50,865 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/04_incdec_cas.i[30729,30742] [2022-07-13 21:40:50,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:40:50,885 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:40:50,933 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/04_incdec_cas.i[30285,30298] [2022-07-13 21:40:50,938 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/04_incdec_cas.i[30729,30742] [2022-07-13 21:40:50,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:40:50,983 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:40:50,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50 WrapperNode [2022-07-13 21:40:50,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:40:50,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:40:50,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:40:50,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:40:50,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,025 INFO L137 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 158 [2022-07-13 21:40:51,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:40:51,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:40:51,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:40:51,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:40:51,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:40:51,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:40:51,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:40:51,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:40:51,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (1/1) ... [2022-07-13 21:40:51,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:40:51,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:51,112 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 21:40:51,115 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 21:40:51,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:40:51,141 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-13 21:40:51,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-13 21:40:51,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:40:51,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:40:51,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:40:51,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:40:51,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:40:51,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:40:51,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:40:51,144 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 21:40:51,307 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:40:51,308 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:40:51,558 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:40:51,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:40:51,690 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 21:40:51,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:40:51 BoogieIcfgContainer [2022-07-13 21:40:51,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:40:51,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:40:51,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:40:51,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:40:51,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:40:50" (1/3) ... [2022-07-13 21:40:51,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4345bbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:40:51, skipping insertion in model container [2022-07-13 21:40:51,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:40:50" (2/3) ... [2022-07-13 21:40:51,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4345bbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:40:51, skipping insertion in model container [2022-07-13 21:40:51,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:40:51" (3/3) ... [2022-07-13 21:40:51,700 INFO L111 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2022-07-13 21:40:51,704 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:40:51,710 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:40:51,710 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:40:51,710 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:40:51,789 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:40:51,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 105 transitions, 215 flow [2022-07-13 21:40:51,862 INFO L129 PetriNetUnfolder]: 9/116 cut-off events. [2022-07-13 21:40:51,863 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:40:51,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 116 events. 9/116 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 238 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-07-13 21:40:51,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 105 transitions, 215 flow [2022-07-13 21:40:51,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 105 transitions, 215 flow [2022-07-13 21:40:51,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:40:51,885 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@538925e3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ea79b8b [2022-07-13 21:40:51,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:40:51,896 INFO L129 PetriNetUnfolder]: 2/55 cut-off events. [2022-07-13 21:40:51,897 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:40:51,897 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:51,898 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] [2022-07-13 21:40:51,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:40:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:51,902 INFO L85 PathProgramCache]: Analyzing trace with hash -618762747, now seen corresponding path program 1 times [2022-07-13 21:40:51,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:51,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903184203] [2022-07-13 21:40:51,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:51,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:52,047 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:40:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:52,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:40:52,123 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:40:52,124 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-13 21:40:52,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-13 21:40:52,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-13 21:40:52,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-13 21:40:52,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-13 21:40:52,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:40:52,128 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-13 21:40:52,131 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:40:52,131 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:40:52,203 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:40:52,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 360 flow [2022-07-13 21:40:52,252 INFO L129 PetriNetUnfolder]: 17/198 cut-off events. [2022-07-13 21:40:52,252 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:40:52,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 198 events. 17/198 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 641 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-07-13 21:40:52,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 360 flow [2022-07-13 21:40:52,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 360 flow [2022-07-13 21:40:52,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:40:52,261 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@538925e3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ea79b8b [2022-07-13 21:40:52,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-13 21:40:52,273 INFO L129 PetriNetUnfolder]: 3/86 cut-off events. [2022-07-13 21:40:52,273 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:40:52,273 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:52,274 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] [2022-07-13 21:40:52,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:40:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash -444542195, now seen corresponding path program 1 times [2022-07-13 21:40:52,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:52,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139727620] [2022-07-13 21:40:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:52,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:52,352 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 21:40:52,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:52,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139727620] [2022-07-13 21:40:52,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139727620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:52,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:52,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:40:52,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762892815] [2022-07-13 21:40:52,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:52,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:40:52,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:52,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:40:52,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:40:52,399 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 174 [2022-07-13 21:40:52,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 174 transitions, 360 flow. Second operand has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 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 21:40:52,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:52,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 174 [2022-07-13 21:40:52,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:52,547 INFO L129 PetriNetUnfolder]: 82/659 cut-off events. [2022-07-13 21:40:52,547 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-13 21:40:52,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 659 events. 82/659 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4394 event pairs, 42 based on Foata normal form. 85/672 useless extension candidates. Maximal degree in co-relation 150. Up to 99 conditions per place. [2022-07-13 21:40:52,558 INFO L132 encePairwiseOnDemand]: 168/174 looper letters, 14 selfloop transitions, 0 changer transitions 0/163 dead transitions. [2022-07-13 21:40:52,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 163 transitions, 366 flow [2022-07-13 21:40:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:40:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:40:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 328 transitions. [2022-07-13 21:40:52,578 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2022-07-13 21:40:52,581 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 328 transitions. [2022-07-13 21:40:52,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 328 transitions. [2022-07-13 21:40:52,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:52,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 328 transitions. [2022-07-13 21:40:52,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 164.0) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:52,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 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 21:40:52,606 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 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 21:40:52,608 INFO L186 Difference]: Start difference. First operand has 164 places, 174 transitions, 360 flow. Second operand 2 states and 328 transitions. [2022-07-13 21:40:52,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 163 transitions, 366 flow [2022-07-13 21:40:52,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 163 transitions, 364 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-13 21:40:52,626 INFO L242 Difference]: Finished difference. Result has 159 places, 163 transitions, 336 flow [2022-07-13 21:40:52,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=336, PETRI_PLACES=159, PETRI_TRANSITIONS=163} [2022-07-13 21:40:52,633 INFO L279 CegarLoopForPetriNet]: 164 programPoint places, -5 predicate places. [2022-07-13 21:40:52,633 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 163 transitions, 336 flow [2022-07-13 21:40:52,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 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 21:40:52,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:52,634 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] [2022-07-13 21:40:52,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:40:52,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:40:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash -983549349, now seen corresponding path program 1 times [2022-07-13 21:40:52,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:52,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121053420] [2022-07-13 21:40:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:52,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:52,683 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:40:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:52,722 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:40:52,724 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:40:52,725 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-13 21:40:52,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-13 21:40:52,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-13 21:40:52,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-13 21:40:52,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-13 21:40:52,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-13 21:40:52,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-13 21:40:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:40:52,728 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:40:52,728 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:40:52,729 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:40:52,835 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:40:52,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 243 transitions, 507 flow [2022-07-13 21:40:52,897 INFO L129 PetriNetUnfolder]: 25/280 cut-off events. [2022-07-13 21:40:52,897 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:40:52,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 280 events. 25/280 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1092 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-07-13 21:40:52,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 243 transitions, 507 flow [2022-07-13 21:40:52,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 243 transitions, 507 flow [2022-07-13 21:40:52,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:40:52,909 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@538925e3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ea79b8b [2022-07-13 21:40:52,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-13 21:40:52,919 INFO L129 PetriNetUnfolder]: 3/90 cut-off events. [2022-07-13 21:40:52,919 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:40:52,919 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:52,920 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] [2022-07-13 21:40:52,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-13 21:40:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1968246583, now seen corresponding path program 1 times [2022-07-13 21:40:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:52,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050029734] [2022-07-13 21:40:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:52,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:52,980 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 21:40:52,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050029734] [2022-07-13 21:40:52,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050029734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:52,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:52,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:40:52,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375009814] [2022-07-13 21:40:52,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:52,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:40:52,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:52,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:40:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:40:52,984 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 243 [2022-07-13 21:40:52,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 243 transitions, 507 flow. Second operand has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 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 21:40:52,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:52,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 243 [2022-07-13 21:40:52,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:53,755 INFO L129 PetriNetUnfolder]: 915/4866 cut-off events. [2022-07-13 21:40:53,756 INFO L130 PetriNetUnfolder]: For 463/463 co-relation queries the response was YES. [2022-07-13 21:40:53,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6266 conditions, 4866 events. 915/4866 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 53404 event pairs, 630 based on Foata normal form. 708/4947 useless extension candidates. Maximal degree in co-relation 789. Up to 1030 conditions per place. [2022-07-13 21:40:53,812 INFO L132 encePairwiseOnDemand]: 235/243 looper letters, 21 selfloop transitions, 0 changer transitions 0/230 dead transitions. [2022-07-13 21:40:53,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 230 transitions, 523 flow [2022-07-13 21:40:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:40:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:40:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 457 transitions. [2022-07-13 21:40:53,815 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9403292181069959 [2022-07-13 21:40:53,816 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 457 transitions. [2022-07-13 21:40:53,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 457 transitions. [2022-07-13 21:40:53,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:53,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 457 transitions. [2022-07-13 21:40:53,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.5) internal successors, (457), 2 states have internal predecessors, (457), 0 states have call successors, (0), 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 21:40:53,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 21:40:53,821 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 21:40:53,821 INFO L186 Difference]: Start difference. First operand has 228 places, 243 transitions, 507 flow. Second operand 2 states and 457 transitions. [2022-07-13 21:40:53,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 230 transitions, 523 flow [2022-07-13 21:40:53,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 230 transitions, 517 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-13 21:40:53,834 INFO L242 Difference]: Finished difference. Result has 223 places, 230 transitions, 475 flow [2022-07-13 21:40:53,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=475, PETRI_PLACES=223, PETRI_TRANSITIONS=230} [2022-07-13 21:40:53,835 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, -5 predicate places. [2022-07-13 21:40:53,836 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 230 transitions, 475 flow [2022-07-13 21:40:53,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 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 21:40:53,836 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:53,836 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 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 21:40:53,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:40:53,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-13 21:40:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1044587364, now seen corresponding path program 1 times [2022-07-13 21:40:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:53,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652240913] [2022-07-13 21:40:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:53,892 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:40:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:40:53,909 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:40:53,910 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:40:53,910 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-07-13 21:40:53,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-07-13 21:40:53,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-07-13 21:40:53,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-07-13 21:40:53,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-07-13 21:40:53,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-07-13 21:40:53,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-07-13 21:40:53,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-07-13 21:40:53,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-07-13 21:40:53,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:40:53,912 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:40:53,912 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:40:53,912 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:40:53,984 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:40:53,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 292 places, 312 transitions, 656 flow [2022-07-13 21:40:54,041 INFO L129 PetriNetUnfolder]: 33/362 cut-off events. [2022-07-13 21:40:54,041 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:40:54,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 362 events. 33/362 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1531 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 288. Up to 10 conditions per place. [2022-07-13 21:40:54,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 312 transitions, 656 flow [2022-07-13 21:40:54,054 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 312 transitions, 656 flow [2022-07-13 21:40:54,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:40:54,057 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@538925e3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ea79b8b [2022-07-13 21:40:54,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-13 21:40:54,064 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2022-07-13 21:40:54,065 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:40:54,065 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:54,065 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] [2022-07-13 21:40:54,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-13 21:40:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1795008533, now seen corresponding path program 1 times [2022-07-13 21:40:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:54,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549223338] [2022-07-13 21:40:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:54,113 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 21:40:54,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:54,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549223338] [2022-07-13 21:40:54,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549223338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:54,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:40:54,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:40:54,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025986329] [2022-07-13 21:40:54,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:54,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:40:54,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:54,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:40:54,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:40:54,119 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 312 [2022-07-13 21:40:54,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 312 transitions, 656 flow. Second operand has 2 states, 2 states have (on average 275.5) internal successors, (551), 2 states have internal predecessors, (551), 0 states have call successors, (0), 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 21:40:54,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:54,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 312 [2022-07-13 21:40:54,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:59,561 INFO L129 PetriNetUnfolder]: 8804/36373 cut-off events. [2022-07-13 21:40:59,562 INFO L130 PetriNetUnfolder]: For 5804/5804 co-relation queries the response was YES. [2022-07-13 21:40:59,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49289 conditions, 36373 events. 8804/36373 cut-off events. For 5804/5804 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 531338 event pairs, 6804 based on Foata normal form. 5755/36930 useless extension candidates. Maximal degree in co-relation 6347. Up to 9605 conditions per place. [2022-07-13 21:41:00,030 INFO L132 encePairwiseOnDemand]: 302/312 looper letters, 28 selfloop transitions, 0 changer transitions 0/297 dead transitions. [2022-07-13 21:41:00,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 297 transitions, 682 flow [2022-07-13 21:41:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:41:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:41:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 586 transitions. [2022-07-13 21:41:00,033 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9391025641025641 [2022-07-13 21:41:00,033 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 586 transitions. [2022-07-13 21:41:00,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 586 transitions. [2022-07-13 21:41:00,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:41:00,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 586 transitions. [2022-07-13 21:41:00,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 293.0) internal successors, (586), 2 states have internal predecessors, (586), 0 states have call successors, (0), 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 21:41:00,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 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 21:41:00,037 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 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 21:41:00,038 INFO L186 Difference]: Start difference. First operand has 292 places, 312 transitions, 656 flow. Second operand 2 states and 586 transitions. [2022-07-13 21:41:00,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 297 transitions, 682 flow [2022-07-13 21:41:00,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 297 transitions, 670 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-13 21:41:00,050 INFO L242 Difference]: Finished difference. Result has 287 places, 297 transitions, 614 flow [2022-07-13 21:41:00,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=614, PETRI_PLACES=287, PETRI_TRANSITIONS=297} [2022-07-13 21:41:00,053 INFO L279 CegarLoopForPetriNet]: 292 programPoint places, -5 predicate places. [2022-07-13 21:41:00,056 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 297 transitions, 614 flow [2022-07-13 21:41:00,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 275.5) internal successors, (551), 2 states have internal predecessors, (551), 0 states have call successors, (0), 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 21:41:00,056 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:41:00,057 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] [2022-07-13 21:41:00,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:41:00,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-13 21:41:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:41:00,058 INFO L85 PathProgramCache]: Analyzing trace with hash -551703534, now seen corresponding path program 1 times [2022-07-13 21:41:00,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:41:00,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977445956] [2022-07-13 21:41:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:41:00,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:41:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:41:00,569 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 21:41:00,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:41:00,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977445956] [2022-07-13 21:41:00,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977445956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:41:00,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:41:00,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 21:41:00,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57998311] [2022-07-13 21:41:00,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:41:00,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 21:41:00,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:41:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 21:41:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-13 21:41:00,574 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 312 [2022-07-13 21:41:00,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 297 transitions, 614 flow. Second operand has 14 states, 14 states have (on average 204.14285714285714) internal successors, (2858), 14 states have internal predecessors, (2858), 0 states have call successors, (0), 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 21:41:00,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:41:00,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 312 [2022-07-13 21:41:00,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand