./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:51:54,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:51:54,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:51:54,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:51:54,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:51:54,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:51:54,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:51:54,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:51:54,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:51:54,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:51:54,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:51:54,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:51:54,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:51:54,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:51:54,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:51:54,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:51:54,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:51:54,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:51:54,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:51:54,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:51:54,089 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:51:54,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:51:54,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:51:54,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:51:54,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:51:54,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:51:54,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:51:54,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:51:54,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:51:54,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:51:54,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:51:54,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:51:54,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:51:54,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:51:54,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:51:54,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:51:54,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:51:54,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:51:54,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:51:54,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:51:54,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:51:54,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:51:54,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:51:54,164 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:51:54,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:51:54,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:51:54,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:51:54,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:51:54,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:51:54,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:51:54,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:51:54,168 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:51:54,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:51:54,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:51:54,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:51:54,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:51:54,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:51:54,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:51:54,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:51:54,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:51:54,170 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:51:54,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:51:54,171 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:51:54,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:51:54,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:51:54,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:51:54,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:51:54,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:51:54,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:51:54,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:51:54,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:51:54,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:51:54,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:51:54,180 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:51:54,180 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:51:54,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:51:54,181 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2022-07-22 21:51:54,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:51:54,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:51:54,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:51:54,435 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:51:54,435 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:51:54,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-07-22 21:51:54,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e60d556/c02aa522375f42d68e438f87f32d2415/FLAG760cd0394 [2022-07-22 21:51:54,946 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:51:54,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-07-22 21:51:54,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e60d556/c02aa522375f42d68e438f87f32d2415/FLAG760cd0394 [2022-07-22 21:51:55,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e60d556/c02aa522375f42d68e438f87f32d2415 [2022-07-22 21:51:55,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:51:55,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:51:55,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:51:55,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:51:55,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:51:55,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f951d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55, skipping insertion in model container [2022-07-22 21:51:55,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:51:55,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:51:55,474 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-07-22 21:51:55,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:51:55,487 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:51:55,519 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-07-22 21:51:55,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:51:55,531 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:51:55,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55 WrapperNode [2022-07-22 21:51:55,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:51:55,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:51:55,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:51:55,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:51:55,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,567 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-07-22 21:51:55,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:51:55,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:51:55,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:51:55,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:51:55,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:51:55,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:51:55,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:51:55,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:51:55,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (1/1) ... [2022-07-22 21:51:55,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:51:55,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:55,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:51:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:51:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:51:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:51:55,698 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:51:55,698 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:51:55,698 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:51:55,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:51:55,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:51:55,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:51:55,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:51:55,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:51:55,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:51:55,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:51:55,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:51:55,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:51:55,701 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:51:55,797 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:51:55,799 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:51:55,965 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:51:56,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:51:56,020 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:51:56,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:56 BoogieIcfgContainer [2022-07-22 21:51:56,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:51:56,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:51:56,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:51:56,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:51:56,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:51:55" (1/3) ... [2022-07-22 21:51:56,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ccd6c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:56, skipping insertion in model container [2022-07-22 21:51:56,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:55" (2/3) ... [2022-07-22 21:51:56,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ccd6c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:56, skipping insertion in model container [2022-07-22 21:51:56,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:56" (3/3) ... [2022-07-22 21:51:56,034 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-07-22 21:51:56,040 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:51:56,049 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:51:56,049 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:51:56,049 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:51:56,126 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:51:56,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-07-22 21:51:56,232 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-22 21:51:56,234 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:51:56,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-07-22 21:51:56,238 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-07-22 21:51:56,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-07-22 21:51:56,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:51:56,269 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2893f63d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d6eb297 [2022-07-22 21:51:56,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:51:56,299 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-07-22 21:51:56,299 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:51:56,299 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:56,300 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:56,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:51:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash -755524680, now seen corresponding path program 1 times [2022-07-22 21:51:56,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:56,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223493360] [2022-07-22 21:51:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:56,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:56,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223493360] [2022-07-22 21:51:56,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223493360] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:56,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:51:56,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:51:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67854508] [2022-07-22 21:51:56,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:56,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:51:56,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:51:56,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:51:56,537 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 84 [2022-07-22 21:51:56,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:56,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 84 [2022-07-22 21:51:56,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:56,577 INFO L129 PetriNetUnfolder]: 4/76 cut-off events. [2022-07-22 21:51:56,577 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-22 21:51:56,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 4/76 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 7/78 useless extension candidates. Maximal degree in co-relation 49. Up to 9 conditions per place. [2022-07-22 21:51:56,579 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 5 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-07-22 21:51:56,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 160 flow [2022-07-22 21:51:56,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:51:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:51:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2022-07-22 21:51:56,590 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9345238095238095 [2022-07-22 21:51:56,590 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2022-07-22 21:51:56,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2022-07-22 21:51:56,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:56,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2022-07-22 21:51:56,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,601 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,602 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 157 transitions. [2022-07-22 21:51:56,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 160 flow [2022-07-22 21:51:56,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:51:56,607 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-07-22 21:51:56,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-07-22 21:51:56,613 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-07-22 21:51:56,613 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-07-22 21:51:56,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,614 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:56,614 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:56,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:51:56,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:51:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2118757903, now seen corresponding path program 1 times [2022-07-22 21:51:56,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:56,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108565376] [2022-07-22 21:51:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:56,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:56,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:56,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108565376] [2022-07-22 21:51:56,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108565376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:56,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:51:56,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:51:56,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027865319] [2022-07-22 21:51:56,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:56,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:51:56,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:56,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:51:56,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:51:56,828 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-07-22 21:51:56,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:56,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-07-22 21:51:56,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:56,962 INFO L129 PetriNetUnfolder]: 50/172 cut-off events. [2022-07-22 21:51:56,962 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-22 21:51:56,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 172 events. 50/172 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 496 event pairs, 19 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 284. Up to 69 conditions per place. [2022-07-22 21:51:56,966 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 24 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-07-22 21:51:56,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 211 flow [2022-07-22 21:51:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:51:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:51:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-07-22 21:51:56,975 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-07-22 21:51:56,975 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-07-22 21:51:56,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-07-22 21:51:56,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:56,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-07-22 21:51:56,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,983 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,983 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 6 states and 360 transitions. [2022-07-22 21:51:56,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 211 flow [2022-07-22 21:51:56,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:51:56,986 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 156 flow [2022-07-22 21:51:56,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-07-22 21:51:56,988 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-07-22 21:51:56,988 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 156 flow [2022-07-22 21:51:56,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,989 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:56,990 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:56,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:51:56,990 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:51:56,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:56,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1443372825, now seen corresponding path program 1 times [2022-07-22 21:51:56,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:56,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528837799] [2022-07-22 21:51:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:56,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:57,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528837799] [2022-07-22 21:51:57,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528837799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:57,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290085229] [2022-07-22 21:51:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:57,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:57,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:57,198 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) [2022-07-22 21:51:57,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:51:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:51:57,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:57,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:57,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290085229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:51:57,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:51:57,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-07-22 21:51:57,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009122072] [2022-07-22 21:51:57,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:51:57,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:51:57,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:57,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:51:57,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:51:57,588 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-07-22 21:51:57,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:57,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:57,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-07-22 21:51:57,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:57,827 INFO L129 PetriNetUnfolder]: 91/351 cut-off events. [2022-07-22 21:51:57,827 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-07-22 21:51:57,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 351 events. 91/351 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1532 event pairs, 5 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 621. Up to 59 conditions per place. [2022-07-22 21:51:57,831 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2022-07-22 21:51:57,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 444 flow [2022-07-22 21:51:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:51:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:51:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 704 transitions. [2022-07-22 21:51:57,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8380952380952381 [2022-07-22 21:51:57,834 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 704 transitions. [2022-07-22 21:51:57,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 704 transitions. [2022-07-22 21:51:57,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:57,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 704 transitions. [2022-07-22 21:51:57,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.4) internal successors, (704), 10 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:57,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:57,839 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:57,839 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 156 flow. Second operand 10 states and 704 transitions. [2022-07-22 21:51:57,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 444 flow [2022-07-22 21:51:57,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:51:57,842 INFO L242 Difference]: Finished difference. Result has 88 places, 88 transitions, 323 flow [2022-07-22 21:51:57,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-07-22 21:51:57,844 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-07-22 21:51:57,844 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 323 flow [2022-07-22 21:51:57,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:57,844 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:57,845 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:57,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:51:58,059 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 [2022-07-22 21:51:58,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:51:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -368775367, now seen corresponding path program 2 times [2022-07-22 21:51:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223893715] [2022-07-22 21:51:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:58,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:58,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223893715] [2022-07-22 21:51:58,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223893715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:58,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010434527] [2022-07-22 21:51:58,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:51:58,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:58,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:58,166 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) [2022-07-22 21:51:58,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:51:58,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:51:58,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:51:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:51:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:51:58,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:51:58,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010434527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:58,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:51:58,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-07-22 21:51:58,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431136218] [2022-07-22 21:51:58,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:58,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:51:58,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:58,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:51:58,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:51:58,392 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-07-22 21:51:58,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:58,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:58,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-07-22 21:51:58,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:58,586 INFO L129 PetriNetUnfolder]: 69/267 cut-off events. [2022-07-22 21:51:58,587 INFO L130 PetriNetUnfolder]: For 413/419 co-relation queries the response was YES. [2022-07-22 21:51:58,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 267 events. 69/267 cut-off events. For 413/419 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1032 event pairs, 15 based on Foata normal form. 12/271 useless extension candidates. Maximal degree in co-relation 706. Up to 68 conditions per place. [2022-07-22 21:51:58,592 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-07-22 21:51:58,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 456 flow [2022-07-22 21:51:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:51:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:51:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2022-07-22 21:51:58,594 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2022-07-22 21:51:58,594 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 482 transitions. [2022-07-22 21:51:58,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 482 transitions. [2022-07-22 21:51:58,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:58,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 482 transitions. [2022-07-22 21:51:58,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:58,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:58,599 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:58,599 INFO L186 Difference]: Start difference. First operand has 88 places, 88 transitions, 323 flow. Second operand 8 states and 482 transitions. [2022-07-22 21:51:58,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 456 flow [2022-07-22 21:51:58,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:51:58,610 INFO L242 Difference]: Finished difference. Result has 95 places, 91 transitions, 371 flow [2022-07-22 21:51:58,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2022-07-22 21:51:58,611 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-07-22 21:51:58,612 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 371 flow [2022-07-22 21:51:58,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:58,612 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:58,613 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:58,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:51:58,827 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 [2022-07-22 21:51:58,828 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:51:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2015979039, now seen corresponding path program 1 times [2022-07-22 21:51:58,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:58,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265783903] [2022-07-22 21:51:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:58,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:59,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:59,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265783903] [2022-07-22 21:51:59,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265783903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:59,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008898155] [2022-07-22 21:51:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:59,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:59,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:59,106 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) [2022-07-22 21:51:59,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:51:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:59,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:51:59,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:59,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:00,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008898155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:00,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:00,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-22 21:52:00,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009903596] [2022-07-22 21:52:00,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:00,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:52:00,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:00,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:52:00,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:52:00,013 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2022-07-22 21:52:00,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 371 flow. Second operand has 18 states, 18 states have (on average 53.333333333333336) internal successors, (960), 18 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:00,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:00,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2022-07-22 21:52:00,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:01,401 INFO L129 PetriNetUnfolder]: 380/1150 cut-off events. [2022-07-22 21:52:01,402 INFO L130 PetriNetUnfolder]: For 2038/2038 co-relation queries the response was YES. [2022-07-22 21:52:01,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 1150 events. 380/1150 cut-off events. For 2038/2038 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7438 event pairs, 30 based on Foata normal form. 2/1148 useless extension candidates. Maximal degree in co-relation 3711. Up to 241 conditions per place. [2022-07-22 21:52:01,412 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 185 selfloop transitions, 96 changer transitions 41/362 dead transitions. [2022-07-22 21:52:01,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 362 transitions, 2654 flow [2022-07-22 21:52:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 21:52:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-22 21:52:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1979 transitions. [2022-07-22 21:52:01,418 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6731292517006803 [2022-07-22 21:52:01,418 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1979 transitions. [2022-07-22 21:52:01,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1979 transitions. [2022-07-22 21:52:01,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:01,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1979 transitions. [2022-07-22 21:52:01,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 56.542857142857144) internal successors, (1979), 35 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:01,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:01,429 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:01,429 INFO L186 Difference]: Start difference. First operand has 95 places, 91 transitions, 371 flow. Second operand 35 states and 1979 transitions. [2022-07-22 21:52:01,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 362 transitions, 2654 flow [2022-07-22 21:52:01,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 362 transitions, 2490 flow, removed 30 selfloop flow, removed 7 redundant places. [2022-07-22 21:52:01,446 INFO L242 Difference]: Finished difference. Result has 141 places, 191 transitions, 1406 flow [2022-07-22 21:52:01,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1406, PETRI_PLACES=141, PETRI_TRANSITIONS=191} [2022-07-22 21:52:01,448 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 67 predicate places. [2022-07-22 21:52:01,448 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 191 transitions, 1406 flow [2022-07-22 21:52:01,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 53.333333333333336) internal successors, (960), 18 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:01,449 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:01,449 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:01,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:01,663 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 [2022-07-22 21:52:01,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:52:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1652012263, now seen corresponding path program 2 times [2022-07-22 21:52:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:01,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624235347] [2022-07-22 21:52:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:01,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:01,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624235347] [2022-07-22 21:52:01,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624235347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:01,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631939499] [2022-07-22 21:52:01,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:52:01,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:01,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:01,776 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) [2022-07-22 21:52:01,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:52:01,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:52:01,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:01,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:52:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:01,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:02,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631939499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:02,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:02,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-22 21:52:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278715669] [2022-07-22 21:52:02,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:02,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:52:02,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:02,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:52:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:52:02,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 84 [2022-07-22 21:52:02,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 191 transitions, 1406 flow. Second operand has 14 states, 14 states have (on average 62.57142857142857) internal successors, (876), 14 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:02,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:02,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 84 [2022-07-22 21:52:02,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:02,571 INFO L129 PetriNetUnfolder]: 402/1245 cut-off events. [2022-07-22 21:52:02,571 INFO L130 PetriNetUnfolder]: For 5294/5294 co-relation queries the response was YES. [2022-07-22 21:52:02,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 1245 events. 402/1245 cut-off events. For 5294/5294 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8183 event pairs, 51 based on Foata normal form. 28/1267 useless extension candidates. Maximal degree in co-relation 4790. Up to 447 conditions per place. [2022-07-22 21:52:02,586 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 117 selfloop transitions, 107 changer transitions 2/274 dead transitions. [2022-07-22 21:52:02,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 274 transitions, 2549 flow [2022-07-22 21:52:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:52:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:52:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 725 transitions. [2022-07-22 21:52:02,589 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7846320346320347 [2022-07-22 21:52:02,590 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 725 transitions. [2022-07-22 21:52:02,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 725 transitions. [2022-07-22 21:52:02,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:02,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 725 transitions. [2022-07-22 21:52:02,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.9090909090909) internal successors, (725), 11 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:02,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 84.0) internal successors, (1008), 12 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:02,594 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 84.0) internal successors, (1008), 12 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:02,595 INFO L186 Difference]: Start difference. First operand has 141 places, 191 transitions, 1406 flow. Second operand 11 states and 725 transitions. [2022-07-22 21:52:02,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 274 transitions, 2549 flow [2022-07-22 21:52:02,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 274 transitions, 2513 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-07-22 21:52:02,627 INFO L242 Difference]: Finished difference. Result has 148 places, 227 transitions, 2203 flow [2022-07-22 21:52:02,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2203, PETRI_PLACES=148, PETRI_TRANSITIONS=227} [2022-07-22 21:52:02,630 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 74 predicate places. [2022-07-22 21:52:02,630 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 227 transitions, 2203 flow [2022-07-22 21:52:02,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.57142857142857) internal successors, (876), 14 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:02,631 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:02,631 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:02,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:02,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:02,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:52:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1903919641, now seen corresponding path program 3 times [2022-07-22 21:52:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:02,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118258982] [2022-07-22 21:52:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:02,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:03,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118258982] [2022-07-22 21:52:03,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118258982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662064319] [2022-07-22 21:52:03,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:52:03,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:03,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:03,068 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) [2022-07-22 21:52:03,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:52:03,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 21:52:03,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:52:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:03,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:03,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662064319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:03,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:03,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-22 21:52:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134299315] [2022-07-22 21:52:03,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:03,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:52:03,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:52:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:52:03,869 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:52:03,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 227 transitions, 2203 flow. Second operand has 20 states, 20 states have (on average 64.1) internal successors, (1282), 20 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:03,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:03,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:52:03,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:06,341 INFO L129 PetriNetUnfolder]: 741/2331 cut-off events. [2022-07-22 21:52:06,342 INFO L130 PetriNetUnfolder]: For 19242/19242 co-relation queries the response was YES. [2022-07-22 21:52:06,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10504 conditions, 2331 events. 741/2331 cut-off events. For 19242/19242 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18200 event pairs, 24 based on Foata normal form. 28/2354 useless extension candidates. Maximal degree in co-relation 10471. Up to 405 conditions per place. [2022-07-22 21:52:06,374 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 143 selfloop transitions, 404 changer transitions 3/617 dead transitions. [2022-07-22 21:52:06,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 617 transitions, 8073 flow [2022-07-22 21:52:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-22 21:52:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-22 21:52:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3366 transitions. [2022-07-22 21:52:06,383 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-07-22 21:52:06,384 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3366 transitions. [2022-07-22 21:52:06,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3366 transitions. [2022-07-22 21:52:06,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:06,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3366 transitions. [2022-07-22 21:52:06,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 66.0) internal successors, (3366), 51 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:06,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:06,403 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:06,403 INFO L186 Difference]: Start difference. First operand has 148 places, 227 transitions, 2203 flow. Second operand 51 states and 3366 transitions. [2022-07-22 21:52:06,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 617 transitions, 8073 flow [2022-07-22 21:52:06,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 617 transitions, 8034 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-07-22 21:52:06,510 INFO L242 Difference]: Finished difference. Result has 217 places, 527 transitions, 7424 flow [2022-07-22 21:52:06,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7424, PETRI_PLACES=217, PETRI_TRANSITIONS=527} [2022-07-22 21:52:06,511 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 143 predicate places. [2022-07-22 21:52:06,511 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 527 transitions, 7424 flow [2022-07-22 21:52:06,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.1) internal successors, (1282), 20 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:06,512 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:06,512 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:06,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:06,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:06,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:52:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:06,727 INFO L85 PathProgramCache]: Analyzing trace with hash -669652269, now seen corresponding path program 4 times [2022-07-22 21:52:06,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:06,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887888560] [2022-07-22 21:52:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:06,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:06,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:06,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887888560] [2022-07-22 21:52:06,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887888560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:06,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364299187] [2022-07-22 21:52:06,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:52:06,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:06,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:06,912 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) [2022-07-22 21:52:06,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:52:06,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:52:06,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:06,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:52:06,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:07,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:07,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364299187] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:07,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:07,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-07-22 21:52:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23792953] [2022-07-22 21:52:07,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:07,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:52:07,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:52:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:52:07,395 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:52:07,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 527 transitions, 7424 flow. Second operand has 20 states, 20 states have (on average 53.85) internal successors, (1077), 20 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:07,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:07,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:52:07,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:09,660 INFO L129 PetriNetUnfolder]: 892/2638 cut-off events. [2022-07-22 21:52:09,660 INFO L130 PetriNetUnfolder]: For 48799/48799 co-relation queries the response was YES. [2022-07-22 21:52:09,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16084 conditions, 2638 events. 892/2638 cut-off events. For 48799/48799 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20818 event pairs, 35 based on Foata normal form. 33/2665 useless extension candidates. Maximal degree in co-relation 16028. Up to 472 conditions per place. [2022-07-22 21:52:09,702 INFO L132 encePairwiseOnDemand]: 73/84 looper letters, 237 selfloop transitions, 591 changer transitions 4/873 dead transitions. [2022-07-22 21:52:09,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 873 transitions, 14493 flow [2022-07-22 21:52:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 21:52:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-22 21:52:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2169 transitions. [2022-07-22 21:52:09,707 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6620879120879121 [2022-07-22 21:52:09,707 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2169 transitions. [2022-07-22 21:52:09,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2169 transitions. [2022-07-22 21:52:09,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:09,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2169 transitions. [2022-07-22 21:52:09,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.61538461538461) internal successors, (2169), 39 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:09,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:09,724 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:09,724 INFO L186 Difference]: Start difference. First operand has 217 places, 527 transitions, 7424 flow. Second operand 39 states and 2169 transitions. [2022-07-22 21:52:09,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 873 transitions, 14493 flow [2022-07-22 21:52:09,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 873 transitions, 13926 flow, removed 257 selfloop flow, removed 1 redundant places. [2022-07-22 21:52:09,982 INFO L242 Difference]: Finished difference. Result has 271 places, 767 transitions, 12829 flow [2022-07-22 21:52:09,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=6996, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=12829, PETRI_PLACES=271, PETRI_TRANSITIONS=767} [2022-07-22 21:52:09,984 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 197 predicate places. [2022-07-22 21:52:09,984 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 767 transitions, 12829 flow [2022-07-22 21:52:09,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.85) internal successors, (1077), 20 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:09,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:09,985 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:10,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 21:52:10,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:10,199 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:52:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:10,200 INFO L85 PathProgramCache]: Analyzing trace with hash -669783597, now seen corresponding path program 5 times [2022-07-22 21:52:10,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:10,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877381334] [2022-07-22 21:52:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:10,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:10,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:10,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877381334] [2022-07-22 21:52:10,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877381334] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:10,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276226171] [2022-07-22 21:52:10,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:52:10,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:10,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:10,328 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) [2022-07-22 21:52:10,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:52:10,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:52:10,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:10,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:52:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:10,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:10,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276226171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:10,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:10,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-07-22 21:52:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841231046] [2022-07-22 21:52:10,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:10,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:52:10,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:10,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:52:10,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:52:10,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:52:10,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 767 transitions, 12829 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:10,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:10,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:52:10,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:12,469 INFO L129 PetriNetUnfolder]: 1077/3296 cut-off events. [2022-07-22 21:52:12,469 INFO L130 PetriNetUnfolder]: For 83266/83275 co-relation queries the response was YES. [2022-07-22 21:52:12,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22568 conditions, 3296 events. 1077/3296 cut-off events. For 83266/83275 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 27832 event pairs, 20 based on Foata normal form. 4/3291 useless extension candidates. Maximal degree in co-relation 22493. Up to 617 conditions per place. [2022-07-22 21:52:12,543 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 361 selfloop transitions, 659 changer transitions 5/1095 dead transitions. [2022-07-22 21:52:12,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1095 transitions, 20859 flow [2022-07-22 21:52:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:52:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-22 21:52:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1580 transitions. [2022-07-22 21:52:12,547 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837301587301587 [2022-07-22 21:52:12,547 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1580 transitions. [2022-07-22 21:52:12,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1580 transitions. [2022-07-22 21:52:12,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:12,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1580 transitions. [2022-07-22 21:52:12,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.83333333333333) internal successors, (1580), 24 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:12,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:12,554 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:12,554 INFO L186 Difference]: Start difference. First operand has 271 places, 767 transitions, 12829 flow. Second operand 24 states and 1580 transitions. [2022-07-22 21:52:12,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1095 transitions, 20859 flow [2022-07-22 21:52:12,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1095 transitions, 20130 flow, removed 222 selfloop flow, removed 9 redundant places. [2022-07-22 21:52:12,954 INFO L242 Difference]: Finished difference. Result has 297 places, 1033 transitions, 20285 flow [2022-07-22 21:52:12,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12370, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=20285, PETRI_PLACES=297, PETRI_TRANSITIONS=1033} [2022-07-22 21:52:12,956 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 223 predicate places. [2022-07-22 21:52:12,956 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 1033 transitions, 20285 flow [2022-07-22 21:52:12,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:12,956 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:12,956 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:12,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 21:52:13,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:13,157 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:52:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:13,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1978536153, now seen corresponding path program 6 times [2022-07-22 21:52:13,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:13,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260984149] [2022-07-22 21:52:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:13,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:13,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:13,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260984149] [2022-07-22 21:52:13,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260984149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:13,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603809338] [2022-07-22 21:52:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:52:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:13,316 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) [2022-07-22 21:52:13,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:52:13,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 21:52:13,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:13,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:52:13,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:13,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:13,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603809338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:13,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:13,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-22 21:52:13,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793514631] [2022-07-22 21:52:13,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:13,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:52:13,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:13,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:52:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:52:13,881 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:52:13,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 1033 transitions, 20285 flow. Second operand has 18 states, 18 states have (on average 64.27777777777777) internal successors, (1157), 18 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:13,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:13,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:52:13,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:20,106 INFO L129 PetriNetUnfolder]: 1619/5380 cut-off events. [2022-07-22 21:52:20,106 INFO L130 PetriNetUnfolder]: For 181812/181813 co-relation queries the response was YES. [2022-07-22 21:52:20,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39862 conditions, 5380 events. 1619/5380 cut-off events. For 181812/181813 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 53181 event pairs, 46 based on Foata normal form. 36/5397 useless extension candidates. Maximal degree in co-relation 39778. Up to 916 conditions per place. [2022-07-22 21:52:20,199 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 328 selfloop transitions, 1339 changer transitions 2/1739 dead transitions. [2022-07-22 21:52:20,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1739 transitions, 38158 flow [2022-07-22 21:52:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-22 21:52:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-07-22 21:52:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5790 transitions. [2022-07-22 21:52:20,220 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7832792207792207 [2022-07-22 21:52:20,220 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5790 transitions. [2022-07-22 21:52:20,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5790 transitions. [2022-07-22 21:52:20,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:20,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5790 transitions. [2022-07-22 21:52:20,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 65.79545454545455) internal successors, (5790), 88 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:20,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 84.0) internal successors, (7476), 89 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:20,271 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 84.0) internal successors, (7476), 89 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:20,271 INFO L186 Difference]: Start difference. First operand has 297 places, 1033 transitions, 20285 flow. Second operand 88 states and 5790 transitions. [2022-07-22 21:52:20,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1739 transitions, 38158 flow [2022-07-22 21:52:21,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1739 transitions, 35776 flow, removed 1125 selfloop flow, removed 7 redundant places. [2022-07-22 21:52:21,500 INFO L242 Difference]: Finished difference. Result has 401 places, 1578 transitions, 35362 flow [2022-07-22 21:52:21,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=19561, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=35362, PETRI_PLACES=401, PETRI_TRANSITIONS=1578} [2022-07-22 21:52:21,502 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 327 predicate places. [2022-07-22 21:52:21,503 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1578 transitions, 35362 flow [2022-07-22 21:52:21,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.27777777777777) internal successors, (1157), 18 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:21,503 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:21,503 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:21,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:21,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 21:52:21,720 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:52:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash -898935893, now seen corresponding path program 7 times [2022-07-22 21:52:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:21,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339082081] [2022-07-22 21:52:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:21,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339082081] [2022-07-22 21:52:21,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339082081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608194913] [2022-07-22 21:52:21,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:52:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:21,855 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) [2022-07-22 21:52:21,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:52:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:21,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:52:21,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:22,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:22,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608194913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:22,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:22,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-22 21:52:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802340261] [2022-07-22 21:52:22,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:22,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:52:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:52:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:52:22,705 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:52:22,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1578 transitions, 35362 flow. Second operand has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:22,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:22,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:52:22,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:28,426 INFO L129 PetriNetUnfolder]: 2142/7671 cut-off events. [2022-07-22 21:52:28,426 INFO L130 PetriNetUnfolder]: For 144366/144368 co-relation queries the response was YES. [2022-07-22 21:52:28,495 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54725 conditions, 7671 events. 2142/7671 cut-off events. For 144366/144368 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 84045 event pairs, 116 based on Foata normal form. 26/7672 useless extension candidates. Maximal degree in co-relation 54618. Up to 1358 conditions per place. [2022-07-22 21:52:28,660 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 379 selfloop transitions, 1797 changer transitions 2/2248 dead transitions. [2022-07-22 21:52:28,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 2248 transitions, 54906 flow [2022-07-22 21:52:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-22 21:52:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-22 21:52:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4497 transitions. [2022-07-22 21:52:28,668 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7872899159663865 [2022-07-22 21:52:28,669 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4497 transitions. [2022-07-22 21:52:28,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4497 transitions. [2022-07-22 21:52:28,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:28,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4497 transitions. [2022-07-22 21:52:28,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 66.13235294117646) internal successors, (4497), 68 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:28,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 84.0) internal successors, (5796), 69 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:28,684 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 84.0) internal successors, (5796), 69 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:28,684 INFO L186 Difference]: Start difference. First operand has 401 places, 1578 transitions, 35362 flow. Second operand 68 states and 4497 transitions. [2022-07-22 21:52:28,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 2248 transitions, 54906 flow [2022-07-22 21:52:30,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 2248 transitions, 53590 flow, removed 531 selfloop flow, removed 12 redundant places. [2022-07-22 21:52:30,729 INFO L242 Difference]: Finished difference. Result has 470 places, 2083 transitions, 52642 flow [2022-07-22 21:52:30,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=34378, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=52642, PETRI_PLACES=470, PETRI_TRANSITIONS=2083} [2022-07-22 21:52:30,732 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 396 predicate places. [2022-07-22 21:52:30,732 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 2083 transitions, 52642 flow [2022-07-22 21:52:30,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:30,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:30,733 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:30,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:30,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:30,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:52:30,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:30,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1892612579, now seen corresponding path program 8 times [2022-07-22 21:52:30,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:30,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193905610] [2022-07-22 21:52:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:30,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:31,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:31,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193905610] [2022-07-22 21:52:31,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193905610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:31,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392143075] [2022-07-22 21:52:31,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:52:31,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:31,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:31,082 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) [2022-07-22 21:52:31,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:52:31,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:52:31,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:52:31,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:31,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:31,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392143075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:31,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:31,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-22 21:52:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306198508] [2022-07-22 21:52:31,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:31,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:52:31,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:52:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:52:31,865 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:52:31,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 2083 transitions, 52642 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:31,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:31,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:52:31,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:36,778 INFO L129 PetriNetUnfolder]: 2244/7866 cut-off events. [2022-07-22 21:52:36,778 INFO L130 PetriNetUnfolder]: For 162615/162616 co-relation queries the response was YES. [2022-07-22 21:52:36,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60291 conditions, 7866 events. 2244/7866 cut-off events. For 162615/162616 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 86031 event pairs, 87 based on Foata normal form. 2/7827 useless extension candidates. Maximal degree in co-relation 60170. Up to 1294 conditions per place. [2022-07-22 21:52:36,911 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 718 selfloop transitions, 1484 changer transitions 5/2277 dead transitions. [2022-07-22 21:52:36,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 2277 transitions, 61483 flow [2022-07-22 21:52:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 21:52:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-22 21:52:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2315 transitions. [2022-07-22 21:52:36,916 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7874149659863946 [2022-07-22 21:52:36,916 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2315 transitions. [2022-07-22 21:52:36,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2315 transitions. [2022-07-22 21:52:36,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:36,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2315 transitions. [2022-07-22 21:52:36,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.14285714285714) internal successors, (2315), 35 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:36,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:36,924 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:36,924 INFO L186 Difference]: Start difference. First operand has 470 places, 2083 transitions, 52642 flow. Second operand 35 states and 2315 transitions. [2022-07-22 21:52:36,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 2277 transitions, 61483 flow [2022-07-22 21:52:39,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2277 transitions, 61057 flow, removed 72 selfloop flow, removed 13 redundant places. [2022-07-22 21:52:39,615 INFO L242 Difference]: Finished difference. Result has 500 places, 2215 transitions, 61253 flow [2022-07-22 21:52:39,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=52136, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=61253, PETRI_PLACES=500, PETRI_TRANSITIONS=2215} [2022-07-22 21:52:39,621 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 426 predicate places. [2022-07-22 21:52:39,621 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 2215 transitions, 61253 flow [2022-07-22 21:52:39,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:39,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:39,622 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:39,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:39,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 21:52:39,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:52:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:39,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1480356137, now seen corresponding path program 9 times [2022-07-22 21:52:39,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:39,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189532590] [2022-07-22 21:52:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:39,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:39,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:39,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189532590] [2022-07-22 21:52:39,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189532590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:39,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308024674] [2022-07-22 21:52:39,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:52:39,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:39,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:39,959 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) [2022-07-22 21:52:39,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:52:40,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 21:52:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:52:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:40,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:40,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308024674] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:40,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:40,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-22 21:52:40,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623001482] [2022-07-22 21:52:40,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:40,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:52:40,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:52:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:52:40,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:52:40,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 2215 transitions, 61253 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:40,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:40,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:52:40,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:46,794 INFO L129 PetriNetUnfolder]: 2495/8401 cut-off events. [2022-07-22 21:52:46,794 INFO L130 PetriNetUnfolder]: For 209693/209714 co-relation queries the response was YES. [2022-07-22 21:52:46,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71084 conditions, 8401 events. 2495/8401 cut-off events. For 209693/209714 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 91524 event pairs, 388 based on Foata normal form. 15/8314 useless extension candidates. Maximal degree in co-relation 70952. Up to 2188 conditions per place. [2022-07-22 21:52:46,939 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 926 selfloop transitions, 1567 changer transitions 9/2572 dead transitions. [2022-07-22 21:52:46,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 2572 transitions, 75880 flow [2022-07-22 21:52:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 21:52:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-22 21:52:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2831 transitions. [2022-07-22 21:52:46,944 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837763012181617 [2022-07-22 21:52:46,944 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2831 transitions. [2022-07-22 21:52:46,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2831 transitions. [2022-07-22 21:52:46,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:46,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2831 transitions. [2022-07-22 21:52:46,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 65.83720930232558) internal successors, (2831), 43 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:46,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:46,956 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:46,956 INFO L186 Difference]: Start difference. First operand has 500 places, 2215 transitions, 61253 flow. Second operand 43 states and 2831 transitions. [2022-07-22 21:52:46,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 2572 transitions, 75880 flow [2022-07-22 21:52:50,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 2572 transitions, 75728 flow, removed 22 selfloop flow, removed 11 redundant places. [2022-07-22 21:52:50,727 INFO L242 Difference]: Finished difference. Result has 544 places, 2515 transitions, 75594 flow [2022-07-22 21:52:50,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=60859, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=75594, PETRI_PLACES=544, PETRI_TRANSITIONS=2515} [2022-07-22 21:52:50,730 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 470 predicate places. [2022-07-22 21:52:50,731 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 2515 transitions, 75594 flow [2022-07-22 21:52:50,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:50,731 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:50,731 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:50,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:50,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 21:52:50,955 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:52:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:50,955 INFO L85 PathProgramCache]: Analyzing trace with hash -759106099, now seen corresponding path program 10 times [2022-07-22 21:52:50,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:50,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437441251] [2022-07-22 21:52:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:50,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437441251] [2022-07-22 21:52:51,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437441251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603525919] [2022-07-22 21:52:51,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:52:51,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:51,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:52:51,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:52:51,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:52:51,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:52:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:51,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:51,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603525919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:51,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:51,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-22 21:52:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941831468] [2022-07-22 21:52:51,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:52:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:51,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:52:51,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:52:51,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:52:51,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 2515 transitions, 75594 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:51,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:51,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:52:51,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:59,325 INFO L129 PetriNetUnfolder]: 2888/9474 cut-off events. [2022-07-22 21:52:59,325 INFO L130 PetriNetUnfolder]: For 286327/286354 co-relation queries the response was YES. [2022-07-22 21:52:59,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87945 conditions, 9474 events. 2888/9474 cut-off events. For 286327/286354 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 104140 event pairs, 269 based on Foata normal form. 9/9456 useless extension candidates. Maximal degree in co-relation 87797. Up to 1720 conditions per place. [2022-07-22 21:52:59,539 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 632 selfloop transitions, 2339 changer transitions 11/3052 dead transitions. [2022-07-22 21:52:59,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 3052 transitions, 97974 flow [2022-07-22 21:52:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 21:52:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-22 21:52:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2629 transitions. [2022-07-22 21:52:59,543 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7824404761904762 [2022-07-22 21:52:59,543 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2629 transitions. [2022-07-22 21:52:59,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2629 transitions. [2022-07-22 21:52:59,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:59,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2629 transitions. [2022-07-22 21:52:59,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.725) internal successors, (2629), 40 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:59,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:59,551 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:59,552 INFO L186 Difference]: Start difference. First operand has 544 places, 2515 transitions, 75594 flow. Second operand 40 states and 2629 transitions. [2022-07-22 21:52:59,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 3052 transitions, 97974 flow [2022-07-22 21:53:05,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 3052 transitions, 97580 flow, removed 82 selfloop flow, removed 12 redundant places. [2022-07-22 21:53:05,144 INFO L242 Difference]: Finished difference. Result has 586 places, 2999 transitions, 99666 flow [2022-07-22 21:53:05,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=75243, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1871, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=99666, PETRI_PLACES=586, PETRI_TRANSITIONS=2999} [2022-07-22 21:53:05,147 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 512 predicate places. [2022-07-22 21:53:05,147 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 2999 transitions, 99666 flow [2022-07-22 21:53:05,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:05,147 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:05,147 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:53:05,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 21:53:05,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 21:53:05,348 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:05,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:05,349 INFO L85 PathProgramCache]: Analyzing trace with hash 704273387, now seen corresponding path program 11 times [2022-07-22 21:53:05,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:05,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947595345] [2022-07-22 21:53:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:05,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:05,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:05,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947595345] [2022-07-22 21:53:05,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947595345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:05,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155188867] [2022-07-22 21:53:05,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:53:05,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:05,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:05,500 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:53:05,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:53:05,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:53:05,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:53:05,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:53:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:05,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:53:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:40,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155188867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:53:40,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:53:40,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:53:40,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588181205] [2022-07-22 21:53:40,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:53:40,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:53:40,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:53:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:53:40,591 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:53:40,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 2999 transitions, 99666 flow. Second operand has 19 states, 19 states have (on average 64.42105263157895) internal successors, (1224), 19 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:40,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:40,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:53:40,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:50,718 INFO L129 PetriNetUnfolder]: 3092/9846 cut-off events. [2022-07-22 21:53:50,719 INFO L130 PetriNetUnfolder]: For 361400/361432 co-relation queries the response was YES. [2022-07-22 21:53:50,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101458 conditions, 9846 events. 3092/9846 cut-off events. For 361400/361432 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 107951 event pairs, 47 based on Foata normal form. 47/9871 useless extension candidates. Maximal degree in co-relation 101294. Up to 1861 conditions per place. [2022-07-22 21:53:50,992 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 302 selfloop transitions, 2957 changer transitions 0/3329 dead transitions. [2022-07-22 21:53:50,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 3329 transitions, 116906 flow [2022-07-22 21:53:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 21:53:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-22 21:53:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2896 transitions. [2022-07-22 21:53:50,995 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7835497835497836 [2022-07-22 21:53:50,995 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2896 transitions. [2022-07-22 21:53:50,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2896 transitions. [2022-07-22 21:53:50,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:50,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2896 transitions. [2022-07-22 21:53:51,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 65.81818181818181) internal successors, (2896), 44 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:51,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 84.0) internal successors, (3780), 45 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:51,004 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 84.0) internal successors, (3780), 45 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:51,004 INFO L186 Difference]: Start difference. First operand has 586 places, 2999 transitions, 99666 flow. Second operand 44 states and 2896 transitions. [2022-07-22 21:53:51,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 3329 transitions, 116906 flow [2022-07-22 21:53:58,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 3329 transitions, 115731 flow, removed 209 selfloop flow, removed 17 redundant places. [2022-07-22 21:53:58,717 INFO L242 Difference]: Finished difference. Result has 614 places, 3282 transitions, 117795 flow [2022-07-22 21:53:58,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=98067, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=117795, PETRI_PLACES=614, PETRI_TRANSITIONS=3282} [2022-07-22 21:53:58,720 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 540 predicate places. [2022-07-22 21:53:58,720 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 3282 transitions, 117795 flow [2022-07-22 21:53:58,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.42105263157895) internal successors, (1224), 19 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:58,721 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:58,721 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:53:58,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:53:58,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 21:53:58,921 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:53:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash -604446607, now seen corresponding path program 12 times [2022-07-22 21:53:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:58,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106189725] [2022-07-22 21:53:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:58,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:59,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:59,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106189725] [2022-07-22 21:53:59,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106189725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:59,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326074102] [2022-07-22 21:53:59,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:53:59,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:59,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:59,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:53:59,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:53:59,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-22 21:53:59,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:53:59,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:53:59,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:59,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:53:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:59,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326074102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:53:59,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:53:59,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-22 21:53:59,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116161687] [2022-07-22 21:53:59,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:53:59,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:53:59,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:59,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:53:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:53:59,787 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:53:59,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 3282 transitions, 117795 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:59,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:59,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:53:59,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:13,043 INFO L129 PetriNetUnfolder]: 3222/10257 cut-off events. [2022-07-22 21:54:13,043 INFO L130 PetriNetUnfolder]: For 430924/430954 co-relation queries the response was YES. [2022-07-22 21:54:13,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113206 conditions, 10257 events. 3222/10257 cut-off events. For 430924/430954 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 112855 event pairs, 96 based on Foata normal form. 2/10220 useless extension candidates. Maximal degree in co-relation 113038. Up to 1975 conditions per place. [2022-07-22 21:54:13,253 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 999 selfloop transitions, 2463 changer transitions 3/3535 dead transitions. [2022-07-22 21:54:13,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 3535 transitions, 133585 flow [2022-07-22 21:54:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:54:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:54:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1973 transitions. [2022-07-22 21:54:13,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7829365079365079 [2022-07-22 21:54:13,256 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1973 transitions. [2022-07-22 21:54:13,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1973 transitions. [2022-07-22 21:54:13,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:13,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1973 transitions. [2022-07-22 21:54:13,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.76666666666667) internal successors, (1973), 30 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:13,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:13,261 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:13,262 INFO L186 Difference]: Start difference. First operand has 614 places, 3282 transitions, 117795 flow. Second operand 30 states and 1973 transitions. [2022-07-22 21:54:13,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 3535 transitions, 133585 flow [2022-07-22 21:54:21,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 3535 transitions, 132967 flow, removed 100 selfloop flow, removed 18 redundant places. [2022-07-22 21:54:21,399 INFO L242 Difference]: Finished difference. Result has 632 places, 3504 transitions, 131162 flow [2022-07-22 21:54:21,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=117235, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=911, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=131162, PETRI_PLACES=632, PETRI_TRANSITIONS=3504} [2022-07-22 21:54:21,402 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 558 predicate places. [2022-07-22 21:54:21,402 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 3504 transitions, 131162 flow [2022-07-22 21:54:21,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:21,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:21,403 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:54:21,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:21,604 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 536604281, now seen corresponding path program 13 times [2022-07-22 21:54:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524038958] [2022-07-22 21:54:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:21,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:21,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524038958] [2022-07-22 21:54:21,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524038958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496609487] [2022-07-22 21:54:21,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:54:21,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:21,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:21,718 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:54:21,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:54:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:21,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:54:21,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:22,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:22,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496609487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:22,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:22,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-22 21:54:22,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333871303] [2022-07-22 21:54:22,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:22,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:54:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:54:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:54:22,564 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:54:22,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 3504 transitions, 131162 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:22,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:22,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:54:22,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:35,770 INFO L129 PetriNetUnfolder]: 3418/10561 cut-off events. [2022-07-22 21:54:35,770 INFO L130 PetriNetUnfolder]: For 473269/473300 co-relation queries the response was YES. [2022-07-22 21:54:35,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123093 conditions, 10561 events. 3418/10561 cut-off events. For 473269/473300 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 115208 event pairs, 100 based on Foata normal form. 4/10526 useless extension candidates. Maximal degree in co-relation 122917. Up to 2111 conditions per place. [2022-07-22 21:54:36,055 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 600 selfloop transitions, 3113 changer transitions 6/3789 dead transitions. [2022-07-22 21:54:36,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 3789 transitions, 148411 flow [2022-07-22 21:54:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 21:54:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-22 21:54:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3013 transitions. [2022-07-22 21:54:36,058 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2022-07-22 21:54:36,058 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3013 transitions. [2022-07-22 21:54:36,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3013 transitions. [2022-07-22 21:54:36,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:36,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3013 transitions. [2022-07-22 21:54:36,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 65.5) internal successors, (3013), 46 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,068 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,068 INFO L186 Difference]: Start difference. First operand has 632 places, 3504 transitions, 131162 flow. Second operand 46 states and 3013 transitions. [2022-07-22 21:54:36,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 3789 transitions, 148411 flow [2022-07-22 21:54:45,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 659 places, 3789 transitions, 147739 flow, removed 20 selfloop flow, removed 14 redundant places. [2022-07-22 21:54:45,427 INFO L242 Difference]: Finished difference. Result has 665 places, 3754 transitions, 148129 flow [2022-07-22 21:54:45,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=130318, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2855, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=148129, PETRI_PLACES=665, PETRI_TRANSITIONS=3754} [2022-07-22 21:54:45,431 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 591 predicate places. [2022-07-22 21:54:45,431 INFO L495 AbstractCegarLoop]: Abstraction has has 665 places, 3754 transitions, 148129 flow [2022-07-22 21:54:45,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:45,432 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:45,432 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:54:45,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:45,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:54:45,656 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:54:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1706854467, now seen corresponding path program 14 times [2022-07-22 21:54:45,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:45,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543054251] [2022-07-22 21:54:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:45,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:45,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:45,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543054251] [2022-07-22 21:54:45,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543054251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:45,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935937758] [2022-07-22 21:54:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:54:45,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:45,782 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:54:45,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 21:54:45,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:54:45,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:45,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:54:45,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:45,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:46,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935937758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:46,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:46,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-07-22 21:54:46,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860821195] [2022-07-22 21:54:46,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:46,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:54:46,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:46,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:54:46,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:54:46,216 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-22 21:54:46,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 665 places, 3754 transitions, 148129 flow. Second operand has 20 states, 20 states have (on average 54.15) internal successors, (1083), 20 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:46,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:46,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-22 21:54:46,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:10,576 INFO L129 PetriNetUnfolder]: 4301/12895 cut-off events. [2022-07-22 21:55:10,576 INFO L130 PetriNetUnfolder]: For 656033/656033 co-relation queries the response was YES. [2022-07-22 21:55:10,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164805 conditions, 12895 events. 4301/12895 cut-off events. For 656033/656033 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 143874 event pairs, 273 based on Foata normal form. 108/12967 useless extension candidates. Maximal degree in co-relation 164623. Up to 3174 conditions per place. [2022-07-22 21:55:11,021 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1561 selfloop transitions, 3626 changer transitions 18/5246 dead transitions. [2022-07-22 21:55:11,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 5246 transitions, 215224 flow [2022-07-22 21:55:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-22 21:55:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-22 21:55:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3957 transitions. [2022-07-22 21:55:11,025 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6634808853118712 [2022-07-22 21:55:11,025 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3957 transitions. [2022-07-22 21:55:11,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3957 transitions. [2022-07-22 21:55:11,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:11,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3957 transitions. [2022-07-22 21:55:11,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 55.732394366197184) internal successors, (3957), 71 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:11,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:11,038 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:11,038 INFO L186 Difference]: Start difference. First operand has 665 places, 3754 transitions, 148129 flow. Second operand 71 states and 3957 transitions. [2022-07-22 21:55:11,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 5246 transitions, 215224 flow [2022-07-22 21:55:24,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 5246 transitions, 211527 flow, removed 163 selfloop flow, removed 27 redundant places. [2022-07-22 21:55:25,134 INFO L242 Difference]: Finished difference. Result has 748 places, 4937 transitions, 206743 flow [2022-07-22 21:55:25,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=144524, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=206743, PETRI_PLACES=748, PETRI_TRANSITIONS=4937} [2022-07-22 21:55:25,138 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 674 predicate places. [2022-07-22 21:55:25,138 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 4937 transitions, 206743 flow [2022-07-22 21:55:25,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.15) internal successors, (1083), 20 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:25,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:25,138 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:25,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:25,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 21:55:25,343 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1970329197, now seen corresponding path program 15 times [2022-07-22 21:55:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:25,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321731653] [2022-07-22 21:55:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:25,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:25,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:25,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321731653] [2022-07-22 21:55:25,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321731653] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921457252] [2022-07-22 21:55:25,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:55:25,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:25,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:25,460 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:25,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 21:55:25,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 21:55:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:55:25,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:25,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:26,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921457252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:26,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:26,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-22 21:55:26,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508874558] [2022-07-22 21:55:26,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:26,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:55:26,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:55:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:55:26,236 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-22 21:55:26,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 4937 transitions, 206743 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:26,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:26,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-22 21:55:26,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:51,218 INFO L129 PetriNetUnfolder]: 4519/13126 cut-off events. [2022-07-22 21:55:51,218 INFO L130 PetriNetUnfolder]: For 797599/797640 co-relation queries the response was YES. [2022-07-22 21:55:51,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184082 conditions, 13126 events. 4519/13126 cut-off events. For 797599/797640 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 144805 event pairs, 474 based on Foata normal form. 6/12984 useless extension candidates. Maximal degree in co-relation 183857. Up to 3145 conditions per place. [2022-07-22 21:55:51,593 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 2000 selfloop transitions, 3159 changer transitions 8/5295 dead transitions. [2022-07-22 21:55:51,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 5295 transitions, 233117 flow [2022-07-22 21:55:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 21:55:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-22 21:55:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1665 transitions. [2022-07-22 21:55:51,595 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928571428571428 [2022-07-22 21:55:51,595 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1665 transitions. [2022-07-22 21:55:51,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1665 transitions. [2022-07-22 21:55:51,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:51,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1665 transitions. [2022-07-22 21:55:51,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 66.6) internal successors, (1665), 25 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:51,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:51,599 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:51,599 INFO L186 Difference]: Start difference. First operand has 748 places, 4937 transitions, 206743 flow. Second operand 25 states and 1665 transitions. [2022-07-22 21:55:51,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 5295 transitions, 233117 flow [2022-07-22 21:56:10,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 5295 transitions, 231817 flow, removed 611 selfloop flow, removed 6 redundant places. [2022-07-22 21:56:10,680 INFO L242 Difference]: Finished difference. Result has 769 places, 5236 transitions, 232025 flow [2022-07-22 21:56:10,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=205445, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2848, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=232025, PETRI_PLACES=769, PETRI_TRANSITIONS=5236} [2022-07-22 21:56:10,684 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 695 predicate places. [2022-07-22 21:56:10,684 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 5236 transitions, 232025 flow [2022-07-22 21:56:10,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:10,685 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:10,685 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:56:10,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-22 21:56:10,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:10,886 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1026929679, now seen corresponding path program 16 times [2022-07-22 21:56:10,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:10,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607807479] [2022-07-22 21:56:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:10,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:11,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607807479] [2022-07-22 21:56:11,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607807479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671195971] [2022-07-22 21:56:11,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:56:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:11,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:11,084 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:56:11,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 21:56:11,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:56:11,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 21:56:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:11,317 INFO L328 TraceCheckSpWp]: Computing backward predicates...