./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.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/37_stack_lock_p0_vs_concur.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 a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:43:16,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:43:16,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:43:16,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:43:16,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:43:16,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:43:16,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:43:16,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:43:16,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:43:16,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:43:16,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:43:16,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:43:16,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:43:16,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:43:16,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:43:16,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:43:16,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:43:16,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:43:16,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:43:16,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:43:16,571 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:43:16,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:43:16,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:43:16,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:43:16,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:43:16,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:43:16,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:43:16,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:43:16,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:43:16,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:43:16,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:43:16,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:43:16,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:43:16,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:43:16,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:43:16,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:43:16,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:43:16,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:43:16,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:43:16,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:43:16,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:43:16,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:43:16,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:43:16,599 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:43:16,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:43:16,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:43:16,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:43:16,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:43:16,600 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:43:16,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:43:16,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:43:16,601 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:43:16,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:43:16,602 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:43:16,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:43:16,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:43:16,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:43:16,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:43:16,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:43:16,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:43:16,603 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:43:16,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:43:16,603 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:43:16,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:43:16,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:43:16,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:43:16,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:43:16,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:43:16,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:43:16,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:43:16,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:43:16,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:43:16,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:43:16,605 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:43:16,605 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:43:16,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:43:16,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 [2022-07-13 21:43:16,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:43:16,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:43:16,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:43:16,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:43:16,769 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:43:16,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-07-13 21:43:16,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c675e7f/b11f550b652f413bbc81714428cf31ea/FLAG8d1ef7767 [2022-07-13 21:43:17,203 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:43:17,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-07-13 21:43:17,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c675e7f/b11f550b652f413bbc81714428cf31ea/FLAG8d1ef7767 [2022-07-13 21:43:17,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c675e7f/b11f550b652f413bbc81714428cf31ea [2022-07-13 21:43:17,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:43:17,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:43:17,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:43:17,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:43:17,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:43:17,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc3eb4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17, skipping insertion in model container [2022-07-13 21:43:17,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:43:17,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:43:17,478 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/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-07-13 21:43:17,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:43:17,488 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:43:17,511 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/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-07-13 21:43:17,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:43:17,531 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:43:17,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17 WrapperNode [2022-07-13 21:43:17,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:43:17,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:43:17,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:43:17,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:43:17,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,558 INFO L137 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 83 [2022-07-13 21:43:17,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:43:17,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:43:17,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:43:17,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:43:17,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:43:17,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:43:17,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:43:17,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:43:17,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (1/1) ... [2022-07-13 21:43:17,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:43:17,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:43:17,599 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 21:43:17,616 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 21:43:17,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:43:17,626 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-13 21:43:17,626 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-13 21:43:17,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:43:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:43:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:43:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:43:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:43:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:43:17,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:43:17,629 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 21:43:17,760 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:43:17,761 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:43:17,901 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:43:17,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:43:17,929 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 21:43:17,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:43:17 BoogieIcfgContainer [2022-07-13 21:43:17,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:43:17,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:43:17,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:43:17,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:43:17,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:43:17" (1/3) ... [2022-07-13 21:43:17,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f534faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:43:17, skipping insertion in model container [2022-07-13 21:43:17,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:43:17" (2/3) ... [2022-07-13 21:43:17,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f534faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:43:17, skipping insertion in model container [2022-07-13 21:43:17,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:43:17" (3/3) ... [2022-07-13 21:43:17,937 INFO L111 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2022-07-13 21:43:17,941 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:43:17,947 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:43:17,947 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:43:17,947 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:43:17,981 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:43:18,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-07-13 21:43:18,026 INFO L129 PetriNetUnfolder]: 7/90 cut-off events. [2022-07-13 21:43:18,026 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:43:18,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2022-07-13 21:43:18,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 79 transitions, 163 flow [2022-07-13 21:43:18,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 79 transitions, 163 flow [2022-07-13 21:43:18,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:43:18,043 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@7f146150, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3db82e44 [2022-07-13 21:43:18,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 21:43:18,057 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2022-07-13 21:43:18,057 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:43:18,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:18,058 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] [2022-07-13 21:43:18,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:43:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:18,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1475979099, now seen corresponding path program 1 times [2022-07-13 21:43:18,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:18,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020548535] [2022-07-13 21:43:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:18,174 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:43:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:18,217 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:43:18,219 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:43:18,221 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-13 21:43:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-13 21:43:18,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-13 21:43:18,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:43:18,225 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-13 21:43:18,231 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:43:18,231 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:43:18,249 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:43:18,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 266 flow [2022-07-13 21:43:18,285 INFO L129 PetriNetUnfolder]: 13/151 cut-off events. [2022-07-13 21:43:18,286 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:43:18,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 13/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 325 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2022-07-13 21:43:18,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 127 transitions, 266 flow [2022-07-13 21:43:18,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 127 transitions, 266 flow [2022-07-13 21:43:18,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:43:18,297 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@7f146150, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3db82e44 [2022-07-13 21:43:18,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:43:18,307 INFO L129 PetriNetUnfolder]: 5/87 cut-off events. [2022-07-13 21:43:18,307 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:43:18,307 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:18,307 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] [2022-07-13 21:43:18,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:43:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1581372145, now seen corresponding path program 1 times [2022-07-13 21:43:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:18,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062459054] [2022-07-13 21:43:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:18,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:18,349 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:43:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:18,375 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:43:18,378 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:43:18,378 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-13 21:43:18,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-13 21:43:18,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-13 21:43:18,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-13 21:43:18,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:43:18,379 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-13 21:43:18,380 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:43:18,380 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:43:18,430 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:43:18,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 175 transitions, 371 flow [2022-07-13 21:43:18,492 INFO L129 PetriNetUnfolder]: 19/212 cut-off events. [2022-07-13 21:43:18,492 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:43:18,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 212 events. 19/212 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 610 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-07-13 21:43:18,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 175 transitions, 371 flow [2022-07-13 21:43:18,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 175 transitions, 371 flow [2022-07-13 21:43:18,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:43:18,509 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@7f146150, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3db82e44 [2022-07-13 21:43:18,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:43:18,539 INFO L129 PetriNetUnfolder]: 8/135 cut-off events. [2022-07-13 21:43:18,539 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:43:18,539 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:18,540 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] [2022-07-13 21:43:18,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:43:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash -975053432, now seen corresponding path program 1 times [2022-07-13 21:43:18,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:18,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92538219] [2022-07-13 21:43:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:18,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:18,585 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:43:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:18,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:43:18,607 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:43:18,607 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-13 21:43:18,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-13 21:43:18,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-13 21:43:18,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-13 21:43:18,615 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-13 21:43:18,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:43:18,615 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-13 21:43:18,616 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:43:18,616 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:43:18,644 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:43:18,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 211 places, 223 transitions, 478 flow [2022-07-13 21:43:18,695 INFO L129 PetriNetUnfolder]: 25/273 cut-off events. [2022-07-13 21:43:18,695 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:43:18,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 273 events. 25/273 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 867 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 220. Up to 10 conditions per place. [2022-07-13 21:43:18,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 223 transitions, 478 flow [2022-07-13 21:43:18,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 223 transitions, 478 flow [2022-07-13 21:43:18,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:43:18,712 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@7f146150, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3db82e44 [2022-07-13 21:43:18,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:43:18,736 INFO L129 PetriNetUnfolder]: 13/163 cut-off events. [2022-07-13 21:43:18,736 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-13 21:43:18,736 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:18,736 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 21:43:18,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:43:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 972721606, now seen corresponding path program 1 times [2022-07-13 21:43:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:18,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873169535] [2022-07-13 21:43:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:18,868 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 21:43:18,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:18,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873169535] [2022-07-13 21:43:18,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873169535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:18,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:18,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:43:18,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812027453] [2022-07-13 21:43:18,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:18,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:43:18,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:43:18,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:43:18,915 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 223 [2022-07-13 21:43:18,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 223 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 181.5) internal successors, (726), 4 states have internal predecessors, (726), 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 21:43:18,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:18,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 223 [2022-07-13 21:43:18,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:20,019 INFO L129 PetriNetUnfolder]: 1809/6870 cut-off events. [2022-07-13 21:43:20,019 INFO L130 PetriNetUnfolder]: For 1569/1569 co-relation queries the response was YES. [2022-07-13 21:43:20,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10122 conditions, 6870 events. 1809/6870 cut-off events. For 1569/1569 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 67152 event pairs, 571 based on Foata normal form. 2759/9069 useless extension candidates. Maximal degree in co-relation 2076. Up to 1062 conditions per place. [2022-07-13 21:43:20,129 INFO L132 encePairwiseOnDemand]: 202/223 looper letters, 42 selfloop transitions, 2 changer transitions 0/210 dead transitions. [2022-07-13 21:43:20,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 210 transitions, 582 flow [2022-07-13 21:43:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:43:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:43:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 811 transitions. [2022-07-13 21:43:20,140 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9091928251121076 [2022-07-13 21:43:20,140 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 811 transitions. [2022-07-13 21:43:20,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 811 transitions. [2022-07-13 21:43:20,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:20,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 811 transitions. [2022-07-13 21:43:20,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 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 21:43:20,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 223.0) internal successors, (1115), 5 states have internal predecessors, (1115), 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 21:43:20,153 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 223.0) internal successors, (1115), 5 states have internal predecessors, (1115), 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 21:43:20,154 INFO L186 Difference]: Start difference. First operand has 211 places, 223 transitions, 478 flow. Second operand 4 states and 811 transitions. [2022-07-13 21:43:20,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 210 transitions, 582 flow [2022-07-13 21:43:20,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 210 transitions, 558 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-13 21:43:20,162 INFO L242 Difference]: Finished difference. Result has 191 places, 186 transitions, 396 flow [2022-07-13 21:43:20,164 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=396, PETRI_PLACES=191, PETRI_TRANSITIONS=186} [2022-07-13 21:43:20,166 INFO L279 CegarLoopForPetriNet]: 211 programPoint places, -20 predicate places. [2022-07-13 21:43:20,166 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 186 transitions, 396 flow [2022-07-13 21:43:20,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.5) internal successors, (726), 4 states have internal predecessors, (726), 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 21:43:20,167 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:20,167 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 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 21:43:20,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:43:20,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:43:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:20,168 INFO L85 PathProgramCache]: Analyzing trace with hash 793798220, now seen corresponding path program 1 times [2022-07-13 21:43:20,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:20,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131008944] [2022-07-13 21:43:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:20,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:20,190 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:43:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:43:20,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:43:20,207 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:43:20,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-13 21:43:20,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-13 21:43:20,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-13 21:43:20,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-13 21:43:20,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-13 21:43:20,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-13 21:43:20,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:43:20,209 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:43:20,209 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:43:20,209 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-13 21:43:20,246 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:43:20,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 256 places, 271 transitions, 587 flow [2022-07-13 21:43:20,287 INFO L129 PetriNetUnfolder]: 31/334 cut-off events. [2022-07-13 21:43:20,288 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-13 21:43:20,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 334 events. 31/334 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1149 event pairs, 0 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 286. Up to 12 conditions per place. [2022-07-13 21:43:20,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 271 transitions, 587 flow [2022-07-13 21:43:20,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 271 transitions, 587 flow [2022-07-13 21:43:20,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:43:20,302 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@7f146150, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3db82e44 [2022-07-13 21:43:20,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-13 21:43:20,312 INFO L129 PetriNetUnfolder]: 12/167 cut-off events. [2022-07-13 21:43:20,313 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-13 21:43:20,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:20,313 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 21:43:20,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:43:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:20,314 INFO L85 PathProgramCache]: Analyzing trace with hash 423251349, now seen corresponding path program 1 times [2022-07-13 21:43:20,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:20,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349091811] [2022-07-13 21:43:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:20,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:20,360 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 21:43:20,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:20,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349091811] [2022-07-13 21:43:20,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349091811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:20,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:20,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:43:20,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31019909] [2022-07-13 21:43:20,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:20,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:43:20,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:20,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:43:20,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:43:20,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 271 [2022-07-13 21:43:20,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 271 transitions, 587 flow. Second operand has 4 states, 4 states have (on average 220.5) internal successors, (882), 4 states have internal predecessors, (882), 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 21:43:20,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:20,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 271 [2022-07-13 21:43:20,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:43:24,819 INFO L129 PetriNetUnfolder]: 9897/30550 cut-off events. [2022-07-13 21:43:24,820 INFO L130 PetriNetUnfolder]: For 9573/9573 co-relation queries the response was YES. [2022-07-13 21:43:25,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46975 conditions, 30550 events. 9897/30550 cut-off events. For 9573/9573 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 357846 event pairs, 3256 based on Foata normal form. 14600/42714 useless extension candidates. Maximal degree in co-relation 9936. Up to 5633 conditions per place. [2022-07-13 21:43:25,358 INFO L132 encePairwiseOnDemand]: 246/271 looper letters, 54 selfloop transitions, 2 changer transitions 0/259 dead transitions. [2022-07-13 21:43:25,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 259 transitions, 739 flow [2022-07-13 21:43:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:43:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:43:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 991 transitions. [2022-07-13 21:43:25,361 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9142066420664207 [2022-07-13 21:43:25,362 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 991 transitions. [2022-07-13 21:43:25,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 991 transitions. [2022-07-13 21:43:25,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:43:25,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 991 transitions. [2022-07-13 21:43:25,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 247.75) internal successors, (991), 4 states have internal predecessors, (991), 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 21:43:25,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 21:43:25,366 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 21:43:25,367 INFO L186 Difference]: Start difference. First operand has 256 places, 271 transitions, 587 flow. Second operand 4 states and 991 transitions. [2022-07-13 21:43:25,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 259 transitions, 739 flow [2022-07-13 21:43:25,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 259 transitions, 695 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-07-13 21:43:25,381 INFO L242 Difference]: Finished difference. Result has 232 places, 227 transitions, 483 flow [2022-07-13 21:43:25,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=483, PETRI_PLACES=232, PETRI_TRANSITIONS=227} [2022-07-13 21:43:25,383 INFO L279 CegarLoopForPetriNet]: 256 programPoint places, -24 predicate places. [2022-07-13 21:43:25,384 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 227 transitions, 483 flow [2022-07-13 21:43:25,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.5) internal successors, (882), 4 states have internal predecessors, (882), 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 21:43:25,384 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:43:25,385 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] [2022-07-13 21:43:25,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:43:25,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:43:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:43:25,385 INFO L85 PathProgramCache]: Analyzing trace with hash 164249550, now seen corresponding path program 1 times [2022-07-13 21:43:25,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:43:25,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051387524] [2022-07-13 21:43:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:43:25,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:43:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:43:25,570 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 21:43:25,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:43:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051387524] [2022-07-13 21:43:25,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051387524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:43:25,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:43:25,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:43:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396212924] [2022-07-13 21:43:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:43:25,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:43:25,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:43:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:43:25,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:43:25,574 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 271 [2022-07-13 21:43:25,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 227 transitions, 483 flow. Second operand has 6 states, 6 states have (on average 169.83333333333334) internal successors, (1019), 6 states have internal predecessors, (1019), 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 21:43:25,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:43:25,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 271 [2022-07-13 21:43:25,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand