./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:38:46,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:38:46,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:38:46,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:38:46,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:38:46,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:38:46,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:38:46,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:38:46,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:38:46,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:38:46,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:38:46,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:38:46,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:38:46,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:38:46,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:38:46,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:38:46,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:38:46,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:38:46,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:38:46,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:38:46,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:38:46,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:38:46,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:38:46,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:38:46,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:38:46,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:38:46,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:38:46,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:38:46,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:38:46,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:38:46,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:38:46,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:38:46,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:38:46,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:38:46,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:38:46,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:38:46,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:38:46,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:38:46,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:38:46,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:38:46,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:38:46,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:38:46,658 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:38:46,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:38:46,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:38:46,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:38:46,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:38:46,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:38:46,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:38:46,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:38:46,662 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:38:46,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:38:46,663 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:38:46,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:38:46,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:38:46,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:38:46,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:38:46,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:38:46,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:38:46,664 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:38:46,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:38:46,665 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:38:46,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:38:46,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:38:46,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:38:46,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:38:46,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:38:46,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:38:46,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:38:46,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:38:46,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:38:46,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:38:46,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:38:46,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:38:46,668 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:38:46,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:38:46,668 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:38:46,668 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:38:46,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:38:46,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:38:46,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:38:46,992 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:38:46,993 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:38:46,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-08-31 03:38:48,267 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:38:48,484 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:38:48,485 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-08-31 03:38:48,492 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6322dcab3/d6afa17b17894db6bc6579b2634bb1da/FLAG2e2fae294 [2023-08-31 03:38:48,504 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6322dcab3/d6afa17b17894db6bc6579b2634bb1da [2023-08-31 03:38:48,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:38:48,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:38:48,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:38:48,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:38:48,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:38:48,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de8fffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48, skipping insertion in model container [2023-08-31 03:38:48,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:38:48,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:38:48,673 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2023-08-31 03:38:48,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:38:48,686 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:38:48,705 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2023-08-31 03:38:48,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:38:48,714 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:38:48,714 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:38:48,720 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:38:48,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48 WrapperNode [2023-08-31 03:38:48,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:38:48,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:38:48,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:38:48,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:38:48,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,787 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2023-08-31 03:38:48,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:38:48,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:38:48,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:38:48,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:38:48,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:38:48,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:38:48,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:38:48,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:38:48,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (1/1) ... [2023-08-31 03:38:48,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:38:48,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:38:48,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 03:38:48,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 03:38:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:38:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:38:48,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:38:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:38:48,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:38:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 03:38:48,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 03:38:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 03:38:48,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 03:38:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:38:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:38:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:38:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:38:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:38:48,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:38:48,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:38:48,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:38:48,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:38:48,920 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:38:49,081 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:38:49,083 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:38:49,335 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:38:49,423 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:38:49,424 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 03:38:49,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:38:49 BoogieIcfgContainer [2023-08-31 03:38:49,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:38:49,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:38:49,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:38:49,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:38:49,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:38:48" (1/3) ... [2023-08-31 03:38:49,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225de7cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:38:49, skipping insertion in model container [2023-08-31 03:38:49,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:38:48" (2/3) ... [2023-08-31 03:38:49,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225de7cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:38:49, skipping insertion in model container [2023-08-31 03:38:49,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:38:49" (3/3) ... [2023-08-31 03:38:49,434 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-08-31 03:38:49,441 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:38:49,449 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:38:49,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:38:49,450 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:38:49,542 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 03:38:49,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 288 flow [2023-08-31 03:38:49,658 INFO L130 PetriNetUnfolder]: 10/124 cut-off events. [2023-08-31 03:38:49,659 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 03:38:49,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 124 events. 10/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-31 03:38:49,665 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 288 flow [2023-08-31 03:38:49,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 248 flow [2023-08-31 03:38:49,673 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:38:49,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 248 flow [2023-08-31 03:38:49,686 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 248 flow [2023-08-31 03:38:49,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 248 flow [2023-08-31 03:38:49,708 INFO L130 PetriNetUnfolder]: 10/112 cut-off events. [2023-08-31 03:38:49,708 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 03:38:49,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 112 events. 10/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-31 03:38:49,711 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2023-08-31 03:38:53,711 INFO L134 LiptonReduction]: Checked pairs total: 1470 [2023-08-31 03:38:53,712 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-31 03:38:53,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:38:53,728 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56d7034d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:38:53,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 03:38:53,735 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2023-08-31 03:38:53,736 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 03:38:53,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:53,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:38:53,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:38:53,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:53,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1331677596, now seen corresponding path program 1 times [2023-08-31 03:38:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:53,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950748870] [2023-08-31 03:38:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:53,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:54,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:54,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950748870] [2023-08-31 03:38:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950748870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:38:54,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:38:54,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 03:38:54,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725560761] [2023-08-31 03:38:54,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:38:54,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:38:54,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:38:54,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:38:54,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 228 [2023-08-31 03:38:54,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:54,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 228 [2023-08-31 03:38:54,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:54,451 INFO L130 PetriNetUnfolder]: 431/611 cut-off events. [2023-08-31 03:38:54,451 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-31 03:38:54,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 611 events. 431/611 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1720 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 928. Up to 405 conditions per place. [2023-08-31 03:38:54,457 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 39 selfloop transitions, 3 changer transitions 3/45 dead transitions. [2023-08-31 03:38:54,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 225 flow [2023-08-31 03:38:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:38:54,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:38:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-08-31 03:38:54,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2023-08-31 03:38:54,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-08-31 03:38:54,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-08-31 03:38:54,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:54,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-08-31 03:38:54,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,500 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 372 transitions. [2023-08-31 03:38:54,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 225 flow [2023-08-31 03:38:54,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 195 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 03:38:54,507 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 81 flow [2023-08-31 03:38:54,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-08-31 03:38:54,513 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2023-08-31 03:38:54,514 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 81 flow [2023-08-31 03:38:54,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:54,514 INFO L208 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] [2023-08-31 03:38:54,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:38:54,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:38:54,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:54,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1009097346, now seen corresponding path program 1 times [2023-08-31 03:38:54,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:54,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191170770] [2023-08-31 03:38:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:54,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:54,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191170770] [2023-08-31 03:38:54,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191170770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:38:54,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:38:54,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:38:54,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831735361] [2023-08-31 03:38:54,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:38:54,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:38:54,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:54,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:38:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:38:54,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2023-08-31 03:38:54,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:54,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2023-08-31 03:38:54,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:54,950 INFO L130 PetriNetUnfolder]: 395/575 cut-off events. [2023-08-31 03:38:54,950 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2023-08-31 03:38:54,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 575 events. 395/575 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1711 event pairs, 45 based on Foata normal form. 36/611 useless extension candidates. Maximal degree in co-relation 474. Up to 369 conditions per place. [2023-08-31 03:38:54,954 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 33 selfloop transitions, 3 changer transitions 20/56 dead transitions. [2023-08-31 03:38:54,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 56 transitions, 261 flow [2023-08-31 03:38:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:38:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:38:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 450 transitions. [2023-08-31 03:38:54,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934210526315789 [2023-08-31 03:38:54,957 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 450 transitions. [2023-08-31 03:38:54,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 450 transitions. [2023-08-31 03:38:54,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:54,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 450 transitions. [2023-08-31 03:38:54,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,961 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 81 flow. Second operand 4 states and 450 transitions. [2023-08-31 03:38:54,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 56 transitions, 261 flow [2023-08-31 03:38:54,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 56 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:38:54,964 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 91 flow [2023-08-31 03:38:54,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-31 03:38:54,964 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-08-31 03:38:54,965 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 91 flow [2023-08-31 03:38:54,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:54,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:54,965 INFO L208 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] [2023-08-31 03:38:54,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:38:54,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:38:54,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1082201917, now seen corresponding path program 1 times [2023-08-31 03:38:54,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:54,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819636427] [2023-08-31 03:38:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:54,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:55,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:55,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819636427] [2023-08-31 03:38:55,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819636427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:55,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805815070] [2023-08-31 03:38:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:55,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:55,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:38:55,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:38:55,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:38:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 03:38:55,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:38:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:55,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:38:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:55,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805815070] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:55,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:38:55,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 9 [2023-08-31 03:38:55,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607219490] [2023-08-31 03:38:55,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:38:55,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:38:55,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:38:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-31 03:38:55,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-08-31 03:38:55,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:55,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:55,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-08-31 03:38:55,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:55,729 INFO L130 PetriNetUnfolder]: 523/722 cut-off events. [2023-08-31 03:38:55,730 INFO L131 PetriNetUnfolder]: For 284/284 co-relation queries the response was YES. [2023-08-31 03:38:55,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1949 conditions, 722 events. 523/722 cut-off events. For 284/284 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2001 event pairs, 67 based on Foata normal form. 36/758 useless extension candidates. Maximal degree in co-relation 664. Up to 355 conditions per place. [2023-08-31 03:38:55,735 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 56 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-31 03:38:55,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 315 flow [2023-08-31 03:38:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:38:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:38:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 458 transitions. [2023-08-31 03:38:55,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021929824561403 [2023-08-31 03:38:55,737 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 458 transitions. [2023-08-31 03:38:55,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 458 transitions. [2023-08-31 03:38:55,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:55,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 458 transitions. [2023-08-31 03:38:55,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:55,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:55,742 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:55,742 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 91 flow. Second operand 4 states and 458 transitions. [2023-08-31 03:38:55,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 315 flow [2023-08-31 03:38:55,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 305 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 03:38:55,747 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 120 flow [2023-08-31 03:38:55,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-31 03:38:55,748 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-31 03:38:55,748 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 120 flow [2023-08-31 03:38:55,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:55,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:55,749 INFO L208 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] [2023-08-31 03:38:55,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:38:55,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:55,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:38:55,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:55,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1640393862, now seen corresponding path program 2 times [2023-08-31 03:38:55,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:55,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700422777] [2023-08-31 03:38:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:55,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:56,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:56,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700422777] [2023-08-31 03:38:56,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700422777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:56,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111966042] [2023-08-31 03:38:56,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:38:56,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:56,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:38:56,123 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:38:56,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:38:56,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:38:56,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:38:56,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 03:38:56,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:38:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:56,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:38:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:56,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111966042] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:56,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:38:56,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2023-08-31 03:38:56,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103070482] [2023-08-31 03:38:56,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:38:56,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:38:56,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:38:56,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-31 03:38:56,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-08-31 03:38:56,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:56,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:56,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-08-31 03:38:56,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:56,528 INFO L130 PetriNetUnfolder]: 683/948 cut-off events. [2023-08-31 03:38:56,528 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-08-31 03:38:56,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2839 conditions, 948 events. 683/948 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2865 event pairs, 99 based on Foata normal form. 24/972 useless extension candidates. Maximal degree in co-relation 1006. Up to 589 conditions per place. [2023-08-31 03:38:56,534 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 55 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-08-31 03:38:56,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 61 transitions, 337 flow [2023-08-31 03:38:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:38:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:38:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-08-31 03:38:56,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49780701754385964 [2023-08-31 03:38:56,536 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-08-31 03:38:56,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-08-31 03:38:56,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:56,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-08-31 03:38:56,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:56,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:56,540 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:56,540 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 120 flow. Second operand 4 states and 454 transitions. [2023-08-31 03:38:56,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 61 transitions, 337 flow [2023-08-31 03:38:56,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 03:38:56,545 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 159 flow [2023-08-31 03:38:56,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-31 03:38:56,546 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-31 03:38:56,547 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 159 flow [2023-08-31 03:38:56,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:56,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:56,547 INFO L208 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] [2023-08-31 03:38:56,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:38:56,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-31 03:38:56,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:38:56,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:56,755 INFO L85 PathProgramCache]: Analyzing trace with hash -144285389, now seen corresponding path program 1 times [2023-08-31 03:38:56,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:56,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246977731] [2023-08-31 03:38:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:56,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:38:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:56,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246977731] [2023-08-31 03:38:56,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246977731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:56,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537025543] [2023-08-31 03:38:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:56,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:56,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:38:56,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:38:56,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:38:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:57,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 03:38:57,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:38:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:38:57,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:38:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:38:57,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537025543] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:57,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:38:57,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 9 [2023-08-31 03:38:57,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512906462] [2023-08-31 03:38:57,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:38:57,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:38:57,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:57,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:38:57,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-31 03:38:57,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-08-31 03:38:57,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:57,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:57,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-08-31 03:38:57,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:57,468 INFO L130 PetriNetUnfolder]: 1401/1990 cut-off events. [2023-08-31 03:38:57,469 INFO L131 PetriNetUnfolder]: For 2927/2927 co-relation queries the response was YES. [2023-08-31 03:38:57,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6439 conditions, 1990 events. 1401/1990 cut-off events. For 2927/2927 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7418 event pairs, 239 based on Foata normal form. 82/2072 useless extension candidates. Maximal degree in co-relation 3337. Up to 875 conditions per place. [2023-08-31 03:38:57,482 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 71 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-08-31 03:38:57,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 78 transitions, 500 flow [2023-08-31 03:38:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:38:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:38:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-08-31 03:38:57,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043859649122807 [2023-08-31 03:38:57,485 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-08-31 03:38:57,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-08-31 03:38:57,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:57,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-08-31 03:38:57,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:57,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:57,489 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:57,489 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 159 flow. Second operand 4 states and 460 transitions. [2023-08-31 03:38:57,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 78 transitions, 500 flow [2023-08-31 03:38:57,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 78 transitions, 492 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-31 03:38:57,494 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 222 flow [2023-08-31 03:38:57,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-31 03:38:57,494 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-08-31 03:38:57,495 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 222 flow [2023-08-31 03:38:57,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:57,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:57,495 INFO L208 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] [2023-08-31 03:38:57,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:38:57,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:57,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:38:57,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:57,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1646860855, now seen corresponding path program 2 times [2023-08-31 03:38:57,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:57,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423166845] [2023-08-31 03:38:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:57,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:38:57,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:57,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423166845] [2023-08-31 03:38:57,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423166845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:38:57,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:38:57,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:38:57,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647441243] [2023-08-31 03:38:57,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:38:57,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:38:57,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:38:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:38:57,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2023-08-31 03:38:57,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:57,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:57,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2023-08-31 03:38:57,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:58,163 INFO L130 PetriNetUnfolder]: 1509/2138 cut-off events. [2023-08-31 03:38:58,164 INFO L131 PetriNetUnfolder]: For 5068/5068 co-relation queries the response was YES. [2023-08-31 03:38:58,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7652 conditions, 2138 events. 1509/2138 cut-off events. For 5068/5068 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8000 event pairs, 525 based on Foata normal form. 28/2166 useless extension candidates. Maximal degree in co-relation 3621. Up to 1983 conditions per place. [2023-08-31 03:38:58,177 INFO L137 encePairwiseOnDemand]: 224/228 looper letters, 48 selfloop transitions, 5 changer transitions 12/65 dead transitions. [2023-08-31 03:38:58,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 476 flow [2023-08-31 03:38:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:38:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:38:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 441 transitions. [2023-08-31 03:38:58,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48355263157894735 [2023-08-31 03:38:58,180 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 441 transitions. [2023-08-31 03:38:58,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 441 transitions. [2023-08-31 03:38:58,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:58,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 441 transitions. [2023-08-31 03:38:58,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:58,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:58,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:58,183 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 222 flow. Second operand 4 states and 441 transitions. [2023-08-31 03:38:58,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 476 flow [2023-08-31 03:38:58,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 03:38:58,190 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 271 flow [2023-08-31 03:38:58,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-08-31 03:38:58,192 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 16 predicate places. [2023-08-31 03:38:58,193 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 271 flow [2023-08-31 03:38:58,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:58,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:58,193 INFO L208 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] [2023-08-31 03:38:58,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 03:38:58,194 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:38:58,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:58,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2073240921, now seen corresponding path program 3 times [2023-08-31 03:38:58,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:58,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169302972] [2023-08-31 03:38:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:58,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:38:58,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:58,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169302972] [2023-08-31 03:38:58,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169302972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:38:58,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:38:58,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:38:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942844512] [2023-08-31 03:38:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:38:58,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:38:58,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:38:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:38:58,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2023-08-31 03:38:58,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:58,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:58,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2023-08-31 03:38:58,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:58,611 INFO L130 PetriNetUnfolder]: 1295/1808 cut-off events. [2023-08-31 03:38:58,611 INFO L131 PetriNetUnfolder]: For 5078/5078 co-relation queries the response was YES. [2023-08-31 03:38:58,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 1808 events. 1295/1808 cut-off events. For 5078/5078 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6162 event pairs, 484 based on Foata normal form. 14/1822 useless extension candidates. Maximal degree in co-relation 6790. Up to 1683 conditions per place. [2023-08-31 03:38:58,625 INFO L137 encePairwiseOnDemand]: 224/228 looper letters, 49 selfloop transitions, 5 changer transitions 8/62 dead transitions. [2023-08-31 03:38:58,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 495 flow [2023-08-31 03:38:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:38:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:38:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 437 transitions. [2023-08-31 03:38:58,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-08-31 03:38:58,627 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 437 transitions. [2023-08-31 03:38:58,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 437 transitions. [2023-08-31 03:38:58,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:58,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 437 transitions. [2023-08-31 03:38:58,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:58,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:58,631 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:58,631 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 271 flow. Second operand 4 states and 437 transitions. [2023-08-31 03:38:58,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 495 flow [2023-08-31 03:38:58,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 484 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 03:38:58,638 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 289 flow [2023-08-31 03:38:58,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-08-31 03:38:58,639 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-08-31 03:38:58,639 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 289 flow [2023-08-31 03:38:58,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:58,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:58,639 INFO L208 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] [2023-08-31 03:38:58,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 03:38:58,640 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:38:58,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:58,640 INFO L85 PathProgramCache]: Analyzing trace with hash -469343912, now seen corresponding path program 1 times [2023-08-31 03:38:58,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:58,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285046084] [2023-08-31 03:38:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:58,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:38:58,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:58,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285046084] [2023-08-31 03:38:58,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285046084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:58,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228074596] [2023-08-31 03:38:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:58,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:58,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:38:58,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:38:58,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:38:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:58,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 03:38:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:38:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:38:58,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:38:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:38:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228074596] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:59,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:38:59,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2023-08-31 03:38:59,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723355313] [2023-08-31 03:38:59,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:38:59,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:38:59,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:59,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:38:59,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-08-31 03:38:59,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-08-31 03:38:59,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 289 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:59,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:59,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-08-31 03:38:59,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:59,415 INFO L130 PetriNetUnfolder]: 2542/3579 cut-off events. [2023-08-31 03:38:59,415 INFO L131 PetriNetUnfolder]: For 10236/10236 co-relation queries the response was YES. [2023-08-31 03:38:59,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14195 conditions, 3579 events. 2542/3579 cut-off events. For 10236/10236 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15162 event pairs, 368 based on Foata normal form. 168/3747 useless extension candidates. Maximal degree in co-relation 7263. Up to 1913 conditions per place. [2023-08-31 03:38:59,443 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 80 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2023-08-31 03:38:59,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 91 transitions, 733 flow [2023-08-31 03:38:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:38:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:38:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 458 transitions. [2023-08-31 03:38:59,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021929824561403 [2023-08-31 03:38:59,445 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 458 transitions. [2023-08-31 03:38:59,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 458 transitions. [2023-08-31 03:38:59,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:59,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 458 transitions. [2023-08-31 03:38:59,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:59,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:59,449 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:59,449 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 289 flow. Second operand 4 states and 458 transitions. [2023-08-31 03:38:59,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 91 transitions, 733 flow [2023-08-31 03:38:59,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:38:59,456 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 384 flow [2023-08-31 03:38:59,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-31 03:38:59,459 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-08-31 03:38:59,459 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 384 flow [2023-08-31 03:38:59,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:59,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:59,459 INFO L208 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] [2023-08-31 03:38:59,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:38:59,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:59,667 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:38:59,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash 326712243, now seen corresponding path program 1 times [2023-08-31 03:38:59,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:59,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166484987] [2023-08-31 03:38:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:59,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:59,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:59,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166484987] [2023-08-31 03:38:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166484987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:59,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565859119] [2023-08-31 03:38:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:59,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:59,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:38:59,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:38:59,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:38:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:59,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 03:38:59,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:38:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:59,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:39:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:39:00,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565859119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:39:00,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:39:00,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-31 03:39:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023018616] [2023-08-31 03:39:00,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:39:00,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:39:00,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:39:00,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:39:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:39:00,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 228 [2023-08-31 03:39:00,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:00,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:39:00,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 228 [2023-08-31 03:39:00,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:39:01,154 INFO L130 PetriNetUnfolder]: 7768/11212 cut-off events. [2023-08-31 03:39:01,154 INFO L131 PetriNetUnfolder]: For 43561/43561 co-relation queries the response was YES. [2023-08-31 03:39:01,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47530 conditions, 11212 events. 7768/11212 cut-off events. For 43561/43561 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 60764 event pairs, 1722 based on Foata normal form. 857/12069 useless extension candidates. Maximal degree in co-relation 25968. Up to 4773 conditions per place. [2023-08-31 03:39:01,233 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 119 selfloop transitions, 45 changer transitions 3/167 dead transitions. [2023-08-31 03:39:01,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 167 transitions, 1571 flow [2023-08-31 03:39:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:39:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:39:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 634 transitions. [2023-08-31 03:39:01,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561403508771929 [2023-08-31 03:39:01,236 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 634 transitions. [2023-08-31 03:39:01,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 634 transitions. [2023-08-31 03:39:01,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:39:01,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 634 transitions. [2023-08-31 03:39:01,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:01,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:01,240 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:01,240 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 384 flow. Second operand 5 states and 634 transitions. [2023-08-31 03:39:01,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 167 transitions, 1571 flow [2023-08-31 03:39:01,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 167 transitions, 1565 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-31 03:39:01,264 INFO L231 Difference]: Finished difference. Result has 59 places, 90 transitions, 910 flow [2023-08-31 03:39:01,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=910, PETRI_PLACES=59, PETRI_TRANSITIONS=90} [2023-08-31 03:39:01,265 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 25 predicate places. [2023-08-31 03:39:01,265 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 90 transitions, 910 flow [2023-08-31 03:39:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:01,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:39:01,266 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 03:39:01,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:39:01,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:39:01,472 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:39:01,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:39:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1317515386, now seen corresponding path program 2 times [2023-08-31 03:39:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:39:01,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750865840] [2023-08-31 03:39:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:39:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:39:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:39:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:39:01,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:39:01,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750865840] [2023-08-31 03:39:01,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750865840] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:39:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145452276] [2023-08-31 03:39:01,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:39:01,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:39:01,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:39:01,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:39:01,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:39:01,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:39:01,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:39:01,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:39:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:39:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:39:01,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:39:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:39:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145452276] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:39:02,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:39:02,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-31 03:39:02,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362001397] [2023-08-31 03:39:02,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:39:02,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:39:02,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:39:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:39:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:39:02,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-31 03:39:02,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 90 transitions, 910 flow. Second operand has 15 states, 15 states have (on average 96.33333333333333) internal successors, (1445), 15 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:02,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:39:02,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-31 03:39:02,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:39:06,441 INFO L130 PetriNetUnfolder]: 24571/35096 cut-off events. [2023-08-31 03:39:06,441 INFO L131 PetriNetUnfolder]: For 166298/166298 co-relation queries the response was YES. [2023-08-31 03:39:06,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167227 conditions, 35096 events. 24571/35096 cut-off events. For 166298/166298 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 221645 event pairs, 2602 based on Foata normal form. 5500/40596 useless extension candidates. Maximal degree in co-relation 82340. Up to 16813 conditions per place. [2023-08-31 03:39:06,734 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 746 selfloop transitions, 316 changer transitions 0/1062 dead transitions. [2023-08-31 03:39:06,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 1062 transitions, 10861 flow [2023-08-31 03:39:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 03:39:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 03:39:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3693 transitions. [2023-08-31 03:39:06,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46278195488721807 [2023-08-31 03:39:06,745 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3693 transitions. [2023-08-31 03:39:06,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3693 transitions. [2023-08-31 03:39:06,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:39:06,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3693 transitions. [2023-08-31 03:39:06,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 105.51428571428572) internal successors, (3693), 35 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:06,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:06,771 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:06,771 INFO L175 Difference]: Start difference. First operand has 59 places, 90 transitions, 910 flow. Second operand 35 states and 3693 transitions. [2023-08-31 03:39:06,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 1062 transitions, 10861 flow [2023-08-31 03:39:06,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 1062 transitions, 9625 flow, removed 618 selfloop flow, removed 0 redundant places. [2023-08-31 03:39:06,931 INFO L231 Difference]: Finished difference. Result has 122 places, 389 transitions, 4934 flow [2023-08-31 03:39:06,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4934, PETRI_PLACES=122, PETRI_TRANSITIONS=389} [2023-08-31 03:39:06,932 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 88 predicate places. [2023-08-31 03:39:06,932 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 389 transitions, 4934 flow [2023-08-31 03:39:06,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 96.33333333333333) internal successors, (1445), 15 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:06,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:39:06,933 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 03:39:06,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 03:39:07,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:39:07,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:39:07,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:39:07,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1179486957, now seen corresponding path program 3 times [2023-08-31 03:39:07,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:39:07,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564016576] [2023-08-31 03:39:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:39:07,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:39:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:39:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:39:07,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:39:07,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564016576] [2023-08-31 03:39:07,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564016576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:39:07,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221218753] [2023-08-31 03:39:07,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:39:07,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:39:07,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:39:07,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:39:07,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:39:07,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:39:07,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:39:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:39:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:39:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:39:07,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:39:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:39:07,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221218753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:39:07,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:39:07,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-31 03:39:07,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90009237] [2023-08-31 03:39:07,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:39:07,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 03:39:07,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:39:07,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 03:39:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-31 03:39:07,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 228 [2023-08-31 03:39:07,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 389 transitions, 4934 flow. Second operand has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:07,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:39:07,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 228 [2023-08-31 03:39:07,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:39:14,870 INFO L130 PetriNetUnfolder]: 32911/46963 cut-off events. [2023-08-31 03:39:14,871 INFO L131 PetriNetUnfolder]: For 1425468/1425468 co-relation queries the response was YES. [2023-08-31 03:39:15,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371594 conditions, 46963 events. 32911/46963 cut-off events. For 1425468/1425468 co-relation queries the response was YES. Maximal size of possible extension queue 1950. Compared 305920 event pairs, 6160 based on Foata normal form. 1192/48155 useless extension candidates. Maximal degree in co-relation 306181. Up to 18872 conditions per place. [2023-08-31 03:39:15,357 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 659 selfloop transitions, 142 changer transitions 45/846 dead transitions. [2023-08-31 03:39:15,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 846 transitions, 12293 flow [2023-08-31 03:39:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 03:39:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 03:39:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1717 transitions. [2023-08-31 03:39:15,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706688596491228 [2023-08-31 03:39:15,361 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1717 transitions. [2023-08-31 03:39:15,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1717 transitions. [2023-08-31 03:39:15,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:39:15,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1717 transitions. [2023-08-31 03:39:15,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 107.3125) internal successors, (1717), 16 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:15,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:15,371 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:15,371 INFO L175 Difference]: Start difference. First operand has 122 places, 389 transitions, 4934 flow. Second operand 16 states and 1717 transitions. [2023-08-31 03:39:15,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 846 transitions, 12293 flow [2023-08-31 03:39:18,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 846 transitions, 11201 flow, removed 487 selfloop flow, removed 3 redundant places. [2023-08-31 03:39:18,630 INFO L231 Difference]: Finished difference. Result has 140 places, 495 transitions, 6778 flow [2023-08-31 03:39:18,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6778, PETRI_PLACES=140, PETRI_TRANSITIONS=495} [2023-08-31 03:39:18,631 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 106 predicate places. [2023-08-31 03:39:18,631 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 495 transitions, 6778 flow [2023-08-31 03:39:18,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:18,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:39:18,632 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 03:39:18,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:39:18,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:39:18,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:39:18,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:39:18,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2010129489, now seen corresponding path program 4 times [2023-08-31 03:39:18,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:39:18,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574875426] [2023-08-31 03:39:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:39:18,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:39:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:39:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:39:19,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:39:19,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574875426] [2023-08-31 03:39:19,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574875426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:39:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834016376] [2023-08-31 03:39:19,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:39:19,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:39:19,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:39:19,229 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:39:19,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:39:19,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:39:19,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:39:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:39:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:39:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:39:19,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:39:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:39:19,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834016376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:39:19,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:39:19,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-08-31 03:39:19,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770775089] [2023-08-31 03:39:19,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:39:19,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:39:19,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:39:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:39:19,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:39:19,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-31 03:39:19,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 495 transitions, 6778 flow. Second operand has 18 states, 18 states have (on average 95.38888888888889) internal successors, (1717), 18 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:19,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:39:19,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-31 03:39:19,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:39:31,891 INFO L130 PetriNetUnfolder]: 49792/69719 cut-off events. [2023-08-31 03:39:31,891 INFO L131 PetriNetUnfolder]: For 2415001/2415001 co-relation queries the response was YES. [2023-08-31 03:39:32,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599805 conditions, 69719 events. 49792/69719 cut-off events. For 2415001/2415001 co-relation queries the response was YES. Maximal size of possible extension queue 2716. Compared 458008 event pairs, 3954 based on Foata normal form. 1354/71073 useless extension candidates. Maximal degree in co-relation 544874. Up to 23207 conditions per place. [2023-08-31 03:39:32,736 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 1059 selfloop transitions, 579 changer transitions 44/1682 dead transitions. [2023-08-31 03:39:32,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1682 transitions, 27131 flow [2023-08-31 03:39:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 03:39:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 03:39:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3336 transitions. [2023-08-31 03:39:32,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45723684210526316 [2023-08-31 03:39:32,745 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3336 transitions. [2023-08-31 03:39:32,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3336 transitions. [2023-08-31 03:39:32,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:39:32,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3336 transitions. [2023-08-31 03:39:32,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 104.25) internal successors, (3336), 32 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:32,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 228.0) internal successors, (7524), 33 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:32,764 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 228.0) internal successors, (7524), 33 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:32,764 INFO L175 Difference]: Start difference. First operand has 140 places, 495 transitions, 6778 flow. Second operand 32 states and 3336 transitions. [2023-08-31 03:39:32,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1682 transitions, 27131 flow [2023-08-31 03:39:40,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 1682 transitions, 25141 flow, removed 891 selfloop flow, removed 6 redundant places. [2023-08-31 03:39:40,819 INFO L231 Difference]: Finished difference. Result has 184 places, 954 transitions, 16579 flow [2023-08-31 03:39:40,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=6022, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=16579, PETRI_PLACES=184, PETRI_TRANSITIONS=954} [2023-08-31 03:39:40,820 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 150 predicate places. [2023-08-31 03:39:40,820 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 954 transitions, 16579 flow [2023-08-31 03:39:40,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.38888888888889) internal successors, (1717), 18 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:40,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:39:40,821 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 03:39:40,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 03:39:41,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 03:39:41,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:39:41,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:39:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1258277956, now seen corresponding path program 5 times [2023-08-31 03:39:41,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:39:41,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185814277] [2023-08-31 03:39:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:39:41,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:39:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:39:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:39:41,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:39:41,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185814277] [2023-08-31 03:39:41,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185814277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:39:41,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980375661] [2023-08-31 03:39:41,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:39:41,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:39:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:39:41,207 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:39:41,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:39:41,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:39:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:39:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:39:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:39:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:39:41,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:39:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:39:41,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980375661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:39:41,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:39:41,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-08-31 03:39:41,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097793371] [2023-08-31 03:39:41,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:39:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:39:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:39:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:39:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:39:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-31 03:39:41,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 954 transitions, 16579 flow. Second operand has 16 states, 16 states have (on average 96.0625) internal successors, (1537), 16 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:41,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:39:41,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-31 03:39:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:40:05,898 INFO L130 PetriNetUnfolder]: 71081/98866 cut-off events. [2023-08-31 03:40:05,898 INFO L131 PetriNetUnfolder]: For 4113218/4113218 co-relation queries the response was YES. [2023-08-31 03:40:07,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923757 conditions, 98866 events. 71081/98866 cut-off events. For 4113218/4113218 co-relation queries the response was YES. Maximal size of possible extension queue 3948. Compared 666810 event pairs, 5286 based on Foata normal form. 5814/104680 useless extension candidates. Maximal degree in co-relation 902438. Up to 37754 conditions per place. [2023-08-31 03:40:07,857 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 1550 selfloop transitions, 941 changer transitions 69/2560 dead transitions. [2023-08-31 03:40:07,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 2560 transitions, 45616 flow [2023-08-31 03:40:07,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 03:40:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 03:40:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3588 transitions. [2023-08-31 03:40:07,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496240601503759 [2023-08-31 03:40:07,864 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3588 transitions. [2023-08-31 03:40:07,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3588 transitions. [2023-08-31 03:40:07,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:40:07,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3588 transitions. [2023-08-31 03:40:07,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 102.51428571428572) internal successors, (3588), 35 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:07,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:07,884 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:07,884 INFO L175 Difference]: Start difference. First operand has 184 places, 954 transitions, 16579 flow. Second operand 35 states and 3588 transitions. [2023-08-31 03:40:07,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 2560 transitions, 45616 flow [2023-08-31 03:40:50,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 2560 transitions, 42900 flow, removed 1308 selfloop flow, removed 3 redundant places. [2023-08-31 03:40:50,799 INFO L231 Difference]: Finished difference. Result has 237 places, 1524 transitions, 28336 flow [2023-08-31 03:40:50,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=14875, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=28336, PETRI_PLACES=237, PETRI_TRANSITIONS=1524} [2023-08-31 03:40:50,801 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 203 predicate places. [2023-08-31 03:40:50,801 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 1524 transitions, 28336 flow [2023-08-31 03:40:50,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 96.0625) internal successors, (1537), 16 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:50,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:40:50,801 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 03:40:50,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:40:51,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 03:40:51,002 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:40:51,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:40:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash 32477611, now seen corresponding path program 6 times [2023-08-31 03:40:51,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:40:51,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867790131] [2023-08-31 03:40:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:40:51,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:40:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:40:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:40:51,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:40:51,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867790131] [2023-08-31 03:40:51,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867790131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:40:51,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294287280] [2023-08-31 03:40:51,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:40:51,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:40:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:40:51,166 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:40:51,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:40:51,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:40:51,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:40:51,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:40:51,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:40:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:40:51,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:40:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:40:51,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294287280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:40:51,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:40:51,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-31 03:40:51,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126039261] [2023-08-31 03:40:51,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:40:51,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:40:51,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:40:51,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:40:51,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:40:51,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 228 [2023-08-31 03:40:51,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 1524 transitions, 28336 flow. Second operand has 15 states, 15 states have (on average 98.6) internal successors, (1479), 15 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:51,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:40:51,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 228 [2023-08-31 03:40:51,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:28,910 INFO L130 PetriNetUnfolder]: 79095/110427 cut-off events. [2023-08-31 03:41:28,910 INFO L131 PetriNetUnfolder]: For 6087808/6087808 co-relation queries the response was YES. [2023-08-31 03:41:31,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194751 conditions, 110427 events. 79095/110427 cut-off events. For 6087808/6087808 co-relation queries the response was YES. Maximal size of possible extension queue 4457. Compared 759956 event pairs, 4816 based on Foata normal form. 3678/114105 useless extension candidates. Maximal degree in co-relation 1192728. Up to 37627 conditions per place. [2023-08-31 03:41:31,896 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 1756 selfloop transitions, 924 changer transitions 69/2749 dead transitions. [2023-08-31 03:41:31,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 2749 transitions, 55133 flow [2023-08-31 03:41:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-31 03:41:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-31 03:41:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4679 transitions. [2023-08-31 03:41:31,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560428849902534 [2023-08-31 03:41:31,902 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4679 transitions. [2023-08-31 03:41:31,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4679 transitions. [2023-08-31 03:41:31,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:31,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4679 transitions. [2023-08-31 03:41:31,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 103.97777777777777) internal successors, (4679), 45 states have internal predecessors, (4679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:31,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 228.0) internal successors, (10488), 46 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:31,923 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 228.0) internal successors, (10488), 46 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:31,923 INFO L175 Difference]: Start difference. First operand has 237 places, 1524 transitions, 28336 flow. Second operand 45 states and 4679 transitions. [2023-08-31 03:41:31,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 2749 transitions, 55133 flow [2023-08-31 03:45:30,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 2749 transitions, 50643 flow, removed 1594 selfloop flow, removed 10 redundant places. [2023-08-31 03:45:30,362 INFO L231 Difference]: Finished difference. Result has 285 places, 1800 transitions, 33151 flow [2023-08-31 03:45:30,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=24319, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=33151, PETRI_PLACES=285, PETRI_TRANSITIONS=1800} [2023-08-31 03:45:30,364 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 251 predicate places. [2023-08-31 03:45:30,364 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1800 transitions, 33151 flow [2023-08-31 03:45:30,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.6) internal successors, (1479), 15 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:30,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:45:30,365 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 03:45:30,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:45:30,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 03:45:30,565 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 03:45:30,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:45:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1518250674, now seen corresponding path program 7 times [2023-08-31 03:45:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:45:30,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083584163] [2023-08-31 03:45:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:45:30,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:45:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:45:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:45:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:45:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083584163] [2023-08-31 03:45:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083584163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:45:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637939232] [2023-08-31 03:45:30,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:45:30,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:45:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:45:30,753 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:45:30,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:45:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:45:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:45:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:45:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:45:30,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:45:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:45:31,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637939232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:45:31,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:45:31,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-31 03:45:31,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424848560] [2023-08-31 03:45:31,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:45:31,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:45:31,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:45:31,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:45:31,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:45:31,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-31 03:45:31,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1800 transitions, 33151 flow. Second operand has 15 states, 15 states have (on average 95.93333333333334) internal successors, (1439), 15 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:31,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:45:31,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-31 03:45:31,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:46:26,559 INFO L130 PetriNetUnfolder]: 95335/133066 cut-off events. [2023-08-31 03:46:26,559 INFO L131 PetriNetUnfolder]: For 9623872/9623872 co-relation queries the response was YES. [2023-08-31 03:46:29,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609635 conditions, 133066 events. 95335/133066 cut-off events. For 9623872/9623872 co-relation queries the response was YES. Maximal size of possible extension queue 5500. Compared 937328 event pairs, 10962 based on Foata normal form. 2966/136032 useless extension candidates. Maximal degree in co-relation 1596343. Up to 46129 conditions per place. [2023-08-31 03:46:30,552 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 2951 selfloop transitions, 1229 changer transitions 161/4341 dead transitions. [2023-08-31 03:46:30,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 4341 transitions, 98097 flow [2023-08-31 03:46:30,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 03:46:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 03:46:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4042 transitions. [2023-08-31 03:46:30,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454565901934323 [2023-08-31 03:46:30,556 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4042 transitions. [2023-08-31 03:46:30,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4042 transitions. [2023-08-31 03:46:30,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:46:30,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4042 transitions. [2023-08-31 03:46:30,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 103.64102564102564) internal successors, (4042), 39 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:30,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 228.0) internal successors, (9120), 40 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:30,567 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 228.0) internal successors, (9120), 40 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:30,567 INFO L175 Difference]: Start difference. First operand has 285 places, 1800 transitions, 33151 flow. Second operand 39 states and 4042 transitions. [2023-08-31 03:46:30,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 4341 transitions, 98097 flow Killed by 15