./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 f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-f4b24e3 [2022-07-13 22:16:13,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:16:13,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:16:13,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:16:13,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:16:13,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:16:13,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:16:13,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:16:13,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:16:13,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:16:13,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:16:13,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:16:13,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:16:13,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:16:13,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:16:13,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:16:13,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:16:13,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:16:13,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:16:13,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:16:13,899 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:16:13,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:16:13,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:16:13,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:16:13,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:16:13,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:16:13,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:16:13,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:16:13,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:16:13,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:16:13,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:16:13,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:16:13,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:16:13,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:16:13,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:16:13,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:16:13,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:16:13,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:16:13,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:16:13,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:16:13,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:16:13,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:16:13,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:16:13,947 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:16:13,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:16:13,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:16:13,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:16:13,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:16:13,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:16:13,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:16:13,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:16:13,950 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:16:13,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:16:13,951 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:16:13,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:16:13,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:16:13,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:16:13,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:16:13,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:16:13,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:16:13,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:16:13,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:16:13,954 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:16:13,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:16:13,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:16:13,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:16:13,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:16:13,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:16:13,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:16:13,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:16:13,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:16:13,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:16:13,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:16:13,956 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:16:13,956 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:16:13,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:16:13,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2022-07-13 22:16:14,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:16:14,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:16:14,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:16:14,197 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:16:14,198 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:16:14,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-07-13 22:16:14,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75150065/9e363f7e270a4100b8048c79d6758c74/FLAG17a0db513 [2022-07-13 22:16:14,645 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:16:14,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-07-13 22:16:14,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75150065/9e363f7e270a4100b8048c79d6758c74/FLAG17a0db513 [2022-07-13 22:16:15,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75150065/9e363f7e270a4100b8048c79d6758c74 [2022-07-13 22:16:15,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:16:15,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:16:15,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:16:15,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:16:15,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:16:15,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36484587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15, skipping insertion in model container [2022-07-13 22:16:15,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:16:15,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:16:15,230 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] [2022-07-13 22:16:15,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:16:15,241 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:16:15,273 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] [2022-07-13 22:16:15,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:16:15,291 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:16:15,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15 WrapperNode [2022-07-13 22:16:15,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:16:15,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:16:15,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:16:15,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:16:15,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,325 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-07-13 22:16:15,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:16:15,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:16:15,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:16:15,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:16:15,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:16:15,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:16:15,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:16:15,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:16:15,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (1/1) ... [2022-07-13 22:16:15,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:16:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:15,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:16:15,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:16:15,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:16:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:16:15,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:16:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:16:15,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:16:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:16:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:16:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:16:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:16:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:16:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:16:15,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:16:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:16:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:16:15,448 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:16:15,530 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:16:15,532 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:16:15,743 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:16:15,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:16:15,776 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 22:16:15,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:16:15 BoogieIcfgContainer [2022-07-13 22:16:15,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:16:15,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:16:15,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:16:15,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:16:15,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:16:15" (1/3) ... [2022-07-13 22:16:15,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e616438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:16:15, skipping insertion in model container [2022-07-13 22:16:15,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:16:15" (2/3) ... [2022-07-13 22:16:15,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e616438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:16:15, skipping insertion in model container [2022-07-13 22:16:15,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:16:15" (3/3) ... [2022-07-13 22:16:15,789 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-07-13 22:16:15,794 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:16:15,802 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:16:15,803 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:16:15,803 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:16:15,874 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:16:15,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-07-13 22:16:15,966 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-13 22:16:15,968 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:16:15,972 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. [2022-07-13 22:16:15,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-07-13 22:16:15,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-07-13 22:16:15,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:16:16,002 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@6c4a6d31, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7689e046 [2022-07-13 22:16:16,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:16:16,034 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-07-13 22:16:16,034 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:16:16,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:16,035 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] [2022-07-13 22:16:16,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash -755524680, now seen corresponding path program 1 times [2022-07-13 22:16:16,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:16,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632337768] [2022-07-13 22:16:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:16,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:16,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:16,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632337768] [2022-07-13 22:16:16,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632337768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:16:16,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:16:16,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:16:16,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252241670] [2022-07-13 22:16:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:16:16,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:16:16,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:16,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:16:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:16:16,328 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 84 [2022-07-13 22:16:16,336 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) [2022-07-13 22:16:16,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:16,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 84 [2022-07-13 22:16:16,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:16,386 INFO L129 PetriNetUnfolder]: 4/76 cut-off events. [2022-07-13 22:16:16,386 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-13 22:16:16,387 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. [2022-07-13 22:16:16,388 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 5 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-07-13 22:16:16,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 160 flow [2022-07-13 22:16:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:16:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:16:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2022-07-13 22:16:16,401 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9345238095238095 [2022-07-13 22:16:16,402 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2022-07-13 22:16:16,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2022-07-13 22:16:16,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:16,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2022-07-13 22:16:16,412 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) [2022-07-13 22:16:16,416 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) [2022-07-13 22:16:16,417 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) [2022-07-13 22:16:16,418 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 157 transitions. [2022-07-13 22:16:16,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 160 flow [2022-07-13 22:16:16,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:16:16,429 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-07-13 22:16:16,430 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} [2022-07-13 22:16:16,435 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-07-13 22:16:16,435 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-07-13 22:16:16,436 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) [2022-07-13 22:16:16,436 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:16,436 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] [2022-07-13 22:16:16,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:16:16,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2118757903, now seen corresponding path program 1 times [2022-07-13 22:16:16,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:16,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920316639] [2022-07-13 22:16:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:16,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:16,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:16,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920316639] [2022-07-13 22:16:16,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920316639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:16:16,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:16:16,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:16:16,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402350833] [2022-07-13 22:16:16,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:16:16,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:16:16,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:16,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:16:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:16:16,728 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-07-13 22:16:16,729 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) [2022-07-13 22:16:16,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:16,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-07-13 22:16:16,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:16,871 INFO L129 PetriNetUnfolder]: 50/172 cut-off events. [2022-07-13 22:16:16,871 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-13 22:16:16,872 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. [2022-07-13 22:16:16,873 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 24 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-07-13 22:16:16,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 211 flow [2022-07-13 22:16:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:16:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:16:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-07-13 22:16:16,880 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-07-13 22:16:16,880 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-07-13 22:16:16,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-07-13 22:16:16,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:16,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-07-13 22:16:16,883 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) [2022-07-13 22:16:16,886 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) [2022-07-13 22:16:16,887 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) [2022-07-13 22:16:16,887 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 6 states and 360 transitions. [2022-07-13 22:16:16,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 211 flow [2022-07-13 22:16:16,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:16:16,890 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 156 flow [2022-07-13 22:16:16,890 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} [2022-07-13 22:16:16,891 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-07-13 22:16:16,891 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 156 flow [2022-07-13 22:16:16,891 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) [2022-07-13 22:16:16,892 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:16,892 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] [2022-07-13 22:16:16,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:16:16,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1443372825, now seen corresponding path program 1 times [2022-07-13 22:16:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:16,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058673948] [2022-07-13 22:16:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:16,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:17,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:17,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058673948] [2022-07-13 22:16:17,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058673948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:17,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80166615] [2022-07-13 22:16:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:17,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:17,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:17,050 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) [2022-07-13 22:16:17,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:16:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:17,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:16:17,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:17,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:17,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80166615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:17,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:17,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-07-13 22:16:17,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68480187] [2022-07-13 22:16:17,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:17,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:16:17,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:17,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:16:17,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:16:17,325 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-07-13 22:16:17,326 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) [2022-07-13 22:16:17,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:17,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-07-13 22:16:17,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:17,560 INFO L129 PetriNetUnfolder]: 91/351 cut-off events. [2022-07-13 22:16:17,560 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-07-13 22:16:17,562 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. [2022-07-13 22:16:17,564 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2022-07-13 22:16:17,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 444 flow [2022-07-13 22:16:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 22:16:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 22:16:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 704 transitions. [2022-07-13 22:16:17,567 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8380952380952381 [2022-07-13 22:16:17,567 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 704 transitions. [2022-07-13 22:16:17,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 704 transitions. [2022-07-13 22:16:17,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:17,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 704 transitions. [2022-07-13 22:16:17,570 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) [2022-07-13 22:16:17,572 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) [2022-07-13 22:16:17,572 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) [2022-07-13 22:16:17,572 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 156 flow. Second operand 10 states and 704 transitions. [2022-07-13 22:16:17,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 444 flow [2022-07-13 22:16:17,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:16:17,576 INFO L242 Difference]: Finished difference. Result has 88 places, 88 transitions, 323 flow [2022-07-13 22:16:17,576 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} [2022-07-13 22:16:17,577 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-07-13 22:16:17,577 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 323 flow [2022-07-13 22:16:17,578 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) [2022-07-13 22:16:17,578 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:17,578 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] [2022-07-13 22:16:17,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 22:16:17,783 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 [2022-07-13 22:16:17,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash -368775367, now seen corresponding path program 2 times [2022-07-13 22:16:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132318924] [2022-07-13 22:16:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:17,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:17,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:17,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132318924] [2022-07-13 22:16:17,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132318924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:17,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432174695] [2022-07-13 22:16:17,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:16:17,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:17,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:17,915 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) [2022-07-13 22:16:17,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:16:17,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 22:16:17,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:16:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:16:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:16:18,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:16:18,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432174695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:16:18,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:16:18,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-07-13 22:16:18,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580796492] [2022-07-13 22:16:18,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:16:18,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:16:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:18,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:16:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:16:18,164 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-07-13 22:16:18,165 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) [2022-07-13 22:16:18,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:18,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-07-13 22:16:18,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:18,340 INFO L129 PetriNetUnfolder]: 69/267 cut-off events. [2022-07-13 22:16:18,340 INFO L130 PetriNetUnfolder]: For 413/419 co-relation queries the response was YES. [2022-07-13 22:16:18,343 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. [2022-07-13 22:16:18,344 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-07-13 22:16:18,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 456 flow [2022-07-13 22:16:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:16:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:16:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2022-07-13 22:16:18,347 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2022-07-13 22:16:18,347 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 482 transitions. [2022-07-13 22:16:18,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 482 transitions. [2022-07-13 22:16:18,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:18,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 482 transitions. [2022-07-13 22:16:18,349 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) [2022-07-13 22:16:18,351 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) [2022-07-13 22:16:18,351 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) [2022-07-13 22:16:18,351 INFO L186 Difference]: Start difference. First operand has 88 places, 88 transitions, 323 flow. Second operand 8 states and 482 transitions. [2022-07-13 22:16:18,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 456 flow [2022-07-13 22:16:18,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:16:18,360 INFO L242 Difference]: Finished difference. Result has 95 places, 91 transitions, 371 flow [2022-07-13 22:16:18,360 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} [2022-07-13 22:16:18,361 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-07-13 22:16:18,361 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 371 flow [2022-07-13 22:16:18,362 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) [2022-07-13 22:16:18,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:18,362 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] [2022-07-13 22:16:18,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:16:18,575 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 [2022-07-13 22:16:18,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:18,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2015979039, now seen corresponding path program 1 times [2022-07-13 22:16:18,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:18,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734448803] [2022-07-13 22:16:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:18,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:18,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:18,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734448803] [2022-07-13 22:16:18,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734448803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:18,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178943042] [2022-07-13 22:16:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:18,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:18,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:18,891 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) [2022-07-13 22:16:18,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:16:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:18,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:16:18,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:19,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:19,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178943042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:19,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:19,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-13 22:16:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666043119] [2022-07-13 22:16:19,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:19,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:16:19,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:19,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:16:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:16:19,690 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2022-07-13 22:16:19,691 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) [2022-07-13 22:16:19,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:19,691 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2022-07-13 22:16:19,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:21,106 INFO L129 PetriNetUnfolder]: 380/1150 cut-off events. [2022-07-13 22:16:21,107 INFO L130 PetriNetUnfolder]: For 2038/2038 co-relation queries the response was YES. [2022-07-13 22:16:21,110 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. [2022-07-13 22:16:21,117 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 185 selfloop transitions, 96 changer transitions 41/362 dead transitions. [2022-07-13 22:16:21,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 362 transitions, 2654 flow [2022-07-13 22:16:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 22:16:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-13 22:16:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1979 transitions. [2022-07-13 22:16:21,132 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6731292517006803 [2022-07-13 22:16:21,132 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1979 transitions. [2022-07-13 22:16:21,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1979 transitions. [2022-07-13 22:16:21,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:21,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1979 transitions. [2022-07-13 22:16:21,152 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) [2022-07-13 22:16:21,156 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) [2022-07-13 22:16:21,157 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) [2022-07-13 22:16:21,157 INFO L186 Difference]: Start difference. First operand has 95 places, 91 transitions, 371 flow. Second operand 35 states and 1979 transitions. [2022-07-13 22:16:21,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 362 transitions, 2654 flow [2022-07-13 22:16:21,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 362 transitions, 2490 flow, removed 30 selfloop flow, removed 7 redundant places. [2022-07-13 22:16:21,186 INFO L242 Difference]: Finished difference. Result has 141 places, 191 transitions, 1406 flow [2022-07-13 22:16:21,186 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} [2022-07-13 22:16:21,187 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 67 predicate places. [2022-07-13 22:16:21,187 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 191 transitions, 1406 flow [2022-07-13 22:16:21,188 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) [2022-07-13 22:16:21,188 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:21,188 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] [2022-07-13 22:16:21,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:16:21,400 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 [2022-07-13 22:16:21,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:21,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1652012263, now seen corresponding path program 2 times [2022-07-13 22:16:21,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:21,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895418367] [2022-07-13 22:16:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:21,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:21,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895418367] [2022-07-13 22:16:21,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895418367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283319127] [2022-07-13 22:16:21,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:16:21,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:21,541 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) [2022-07-13 22:16:21,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:16:21,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:16:21,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:16:21,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 22:16:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:21,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:21,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283319127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:21,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:21,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-13 22:16:21,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409079974] [2022-07-13 22:16:21,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:21,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 22:16:21,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 22:16:21,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:16:21,880 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 84 [2022-07-13 22:16:21,881 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) [2022-07-13 22:16:21,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:21,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 84 [2022-07-13 22:16:21,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:22,268 INFO L129 PetriNetUnfolder]: 402/1245 cut-off events. [2022-07-13 22:16:22,268 INFO L130 PetriNetUnfolder]: For 5294/5294 co-relation queries the response was YES. [2022-07-13 22:16:22,274 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. [2022-07-13 22:16:22,282 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 117 selfloop transitions, 107 changer transitions 2/274 dead transitions. [2022-07-13 22:16:22,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 274 transitions, 2549 flow [2022-07-13 22:16:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 22:16:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 22:16:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 725 transitions. [2022-07-13 22:16:22,284 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7846320346320347 [2022-07-13 22:16:22,285 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 725 transitions. [2022-07-13 22:16:22,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 725 transitions. [2022-07-13 22:16:22,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:22,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 725 transitions. [2022-07-13 22:16:22,287 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) [2022-07-13 22:16:22,288 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) [2022-07-13 22:16:22,289 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) [2022-07-13 22:16:22,289 INFO L186 Difference]: Start difference. First operand has 141 places, 191 transitions, 1406 flow. Second operand 11 states and 725 transitions. [2022-07-13 22:16:22,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 274 transitions, 2549 flow [2022-07-13 22:16:22,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 274 transitions, 2513 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-07-13 22:16:22,320 INFO L242 Difference]: Finished difference. Result has 148 places, 227 transitions, 2203 flow [2022-07-13 22:16:22,320 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} [2022-07-13 22:16:22,321 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 74 predicate places. [2022-07-13 22:16:22,321 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 227 transitions, 2203 flow [2022-07-13 22:16:22,322 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) [2022-07-13 22:16:22,322 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:22,322 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] [2022-07-13 22:16:22,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:16:22,531 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 [2022-07-13 22:16:22,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1903919641, now seen corresponding path program 3 times [2022-07-13 22:16:22,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:22,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752821873] [2022-07-13 22:16:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:22,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:22,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:22,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752821873] [2022-07-13 22:16:22,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752821873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:22,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219387867] [2022-07-13 22:16:22,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:16:22,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:22,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:22,752 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) [2022-07-13 22:16:22,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:16:22,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 22:16:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:16:22,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:16:22,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:22,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:23,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219387867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:23,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:23,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-13 22:16:23,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921028695] [2022-07-13 22:16:23,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:23,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:16:23,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:16:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:16:23,560 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:16:23,562 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) [2022-07-13 22:16:23,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:23,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:16:23,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:25,941 INFO L129 PetriNetUnfolder]: 741/2331 cut-off events. [2022-07-13 22:16:25,941 INFO L130 PetriNetUnfolder]: For 19242/19242 co-relation queries the response was YES. [2022-07-13 22:16:25,952 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. [2022-07-13 22:16:25,968 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 143 selfloop transitions, 404 changer transitions 3/617 dead transitions. [2022-07-13 22:16:25,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 617 transitions, 8073 flow [2022-07-13 22:16:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-13 22:16:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-13 22:16:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3366 transitions. [2022-07-13 22:16:25,978 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-07-13 22:16:25,978 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3366 transitions. [2022-07-13 22:16:25,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3366 transitions. [2022-07-13 22:16:25,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:25,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3366 transitions. [2022-07-13 22:16:25,989 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) [2022-07-13 22:16:25,997 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) [2022-07-13 22:16:25,998 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) [2022-07-13 22:16:25,999 INFO L186 Difference]: Start difference. First operand has 148 places, 227 transitions, 2203 flow. Second operand 51 states and 3366 transitions. [2022-07-13 22:16:25,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 617 transitions, 8073 flow [2022-07-13 22:16:26,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 617 transitions, 8034 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-07-13 22:16:26,070 INFO L242 Difference]: Finished difference. Result has 217 places, 527 transitions, 7424 flow [2022-07-13 22:16:26,070 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} [2022-07-13 22:16:26,072 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 143 predicate places. [2022-07-13 22:16:26,072 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 527 transitions, 7424 flow [2022-07-13 22:16:26,073 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) [2022-07-13 22:16:26,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:26,073 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] [2022-07-13 22:16:26,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:16:26,290 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 [2022-07-13 22:16:26,291 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:26,292 INFO L85 PathProgramCache]: Analyzing trace with hash -669652269, now seen corresponding path program 4 times [2022-07-13 22:16:26,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:26,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498873007] [2022-07-13 22:16:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:26,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:26,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:26,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498873007] [2022-07-13 22:16:26,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498873007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:26,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578071164] [2022-07-13 22:16:26,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:16:26,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:26,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:26,468 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) [2022-07-13 22:16:26,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:16:26,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:16:26,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:16:26,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:16:26,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:26,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:26,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578071164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:26,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:26,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-07-13 22:16:26,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044386639] [2022-07-13 22:16:26,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:26,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:16:26,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:26,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:16:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:16:26,945 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:16:26,946 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) [2022-07-13 22:16:26,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:26,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:16:26,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:29,279 INFO L129 PetriNetUnfolder]: 892/2638 cut-off events. [2022-07-13 22:16:29,280 INFO L130 PetriNetUnfolder]: For 48799/48799 co-relation queries the response was YES. [2022-07-13 22:16:29,299 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. [2022-07-13 22:16:29,323 INFO L132 encePairwiseOnDemand]: 73/84 looper letters, 237 selfloop transitions, 591 changer transitions 4/873 dead transitions. [2022-07-13 22:16:29,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 873 transitions, 14493 flow [2022-07-13 22:16:29,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 22:16:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-13 22:16:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2169 transitions. [2022-07-13 22:16:29,328 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6620879120879121 [2022-07-13 22:16:29,328 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2169 transitions. [2022-07-13 22:16:29,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2169 transitions. [2022-07-13 22:16:29,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:29,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2169 transitions. [2022-07-13 22:16:29,332 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) [2022-07-13 22:16:29,336 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) [2022-07-13 22:16:29,337 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) [2022-07-13 22:16:29,337 INFO L186 Difference]: Start difference. First operand has 217 places, 527 transitions, 7424 flow. Second operand 39 states and 2169 transitions. [2022-07-13 22:16:29,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 873 transitions, 14493 flow [2022-07-13 22:16:29,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 873 transitions, 13926 flow, removed 257 selfloop flow, removed 1 redundant places. [2022-07-13 22:16:29,539 INFO L242 Difference]: Finished difference. Result has 271 places, 767 transitions, 12829 flow [2022-07-13 22:16:29,539 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} [2022-07-13 22:16:29,540 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 197 predicate places. [2022-07-13 22:16:29,540 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 767 transitions, 12829 flow [2022-07-13 22:16:29,541 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) [2022-07-13 22:16:29,541 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:29,541 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] [2022-07-13 22:16:29,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 22:16:29,764 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 [2022-07-13 22:16:29,765 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:29,765 INFO L85 PathProgramCache]: Analyzing trace with hash -669783597, now seen corresponding path program 5 times [2022-07-13 22:16:29,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:29,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157987086] [2022-07-13 22:16:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:29,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:29,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:29,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157987086] [2022-07-13 22:16:29,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157987086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:29,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321454060] [2022-07-13 22:16:29,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:16:29,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:29,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:29,888 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) [2022-07-13 22:16:29,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:16:29,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:16:29,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:16:29,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:16:29,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:30,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:30,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321454060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:30,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:30,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-07-13 22:16:30,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069870011] [2022-07-13 22:16:30,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:30,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:16:30,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:30,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:16:30,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:16:30,422 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:16:30,423 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) [2022-07-13 22:16:30,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:30,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:16:30,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:31,978 INFO L129 PetriNetUnfolder]: 1077/3296 cut-off events. [2022-07-13 22:16:31,978 INFO L130 PetriNetUnfolder]: For 83266/83275 co-relation queries the response was YES. [2022-07-13 22:16:32,010 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. [2022-07-13 22:16:32,047 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 361 selfloop transitions, 659 changer transitions 5/1095 dead transitions. [2022-07-13 22:16:32,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1095 transitions, 20859 flow [2022-07-13 22:16:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 22:16:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-13 22:16:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1580 transitions. [2022-07-13 22:16:32,093 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837301587301587 [2022-07-13 22:16:32,093 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1580 transitions. [2022-07-13 22:16:32,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1580 transitions. [2022-07-13 22:16:32,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:32,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1580 transitions. [2022-07-13 22:16:32,095 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) [2022-07-13 22:16:32,098 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) [2022-07-13 22:16:32,098 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) [2022-07-13 22:16:32,098 INFO L186 Difference]: Start difference. First operand has 271 places, 767 transitions, 12829 flow. Second operand 24 states and 1580 transitions. [2022-07-13 22:16:32,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1095 transitions, 20859 flow [2022-07-13 22:16:32,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1095 transitions, 20130 flow, removed 222 selfloop flow, removed 9 redundant places. [2022-07-13 22:16:32,438 INFO L242 Difference]: Finished difference. Result has 297 places, 1033 transitions, 20285 flow [2022-07-13 22:16:32,439 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} [2022-07-13 22:16:32,440 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 223 predicate places. [2022-07-13 22:16:32,440 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 1033 transitions, 20285 flow [2022-07-13 22:16:32,440 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) [2022-07-13 22:16:32,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:32,441 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] [2022-07-13 22:16:32,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 22:16:32,663 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 [2022-07-13 22:16:32,663 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1978536153, now seen corresponding path program 6 times [2022-07-13 22:16:32,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:32,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886892211] [2022-07-13 22:16:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:32,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:32,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:32,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886892211] [2022-07-13 22:16:32,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886892211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:32,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443353529] [2022-07-13 22:16:32,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:16:32,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:32,803 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) [2022-07-13 22:16:32,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:16:32,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:16:32,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:16:32,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:16:32,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:33,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:33,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443353529] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:33,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:33,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-13 22:16:33,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028564979] [2022-07-13 22:16:33,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:33,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:16:33,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:33,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:16:33,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:16:33,344 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:16:33,345 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) [2022-07-13 22:16:33,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:33,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:16:33,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:41,971 INFO L129 PetriNetUnfolder]: 1619/5380 cut-off events. [2022-07-13 22:16:41,971 INFO L130 PetriNetUnfolder]: For 181812/181813 co-relation queries the response was YES. [2022-07-13 22:16:42,017 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. [2022-07-13 22:16:42,057 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 328 selfloop transitions, 1339 changer transitions 2/1739 dead transitions. [2022-07-13 22:16:42,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1739 transitions, 38158 flow [2022-07-13 22:16:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-13 22:16:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-07-13 22:16:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5790 transitions. [2022-07-13 22:16:42,071 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7832792207792207 [2022-07-13 22:16:42,071 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5790 transitions. [2022-07-13 22:16:42,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5790 transitions. [2022-07-13 22:16:42,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:42,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5790 transitions. [2022-07-13 22:16:42,099 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) [2022-07-13 22:16:42,137 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) [2022-07-13 22:16:42,146 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) [2022-07-13 22:16:42,146 INFO L186 Difference]: Start difference. First operand has 297 places, 1033 transitions, 20285 flow. Second operand 88 states and 5790 transitions. [2022-07-13 22:16:42,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1739 transitions, 38158 flow [2022-07-13 22:16:43,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1739 transitions, 35776 flow, removed 1125 selfloop flow, removed 7 redundant places. [2022-07-13 22:16:43,189 INFO L242 Difference]: Finished difference. Result has 401 places, 1578 transitions, 35362 flow [2022-07-13 22:16:43,190 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} [2022-07-13 22:16:43,191 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 327 predicate places. [2022-07-13 22:16:43,191 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1578 transitions, 35362 flow [2022-07-13 22:16:43,192 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) [2022-07-13 22:16:43,192 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:43,192 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] [2022-07-13 22:16:43,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 22:16:43,415 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 [2022-07-13 22:16:43,415 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash -898935893, now seen corresponding path program 7 times [2022-07-13 22:16:43,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:43,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789639204] [2022-07-13 22:16:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:43,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789639204] [2022-07-13 22:16:43,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789639204] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177995299] [2022-07-13 22:16:43,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:16:43,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:43,564 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) [2022-07-13 22:16:43,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:16:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:16:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:43,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:44,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177995299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:44,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:44,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-13 22:16:44,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414935433] [2022-07-13 22:16:44,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:44,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:16:44,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:44,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:16:44,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:16:44,461 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:16:44,462 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) [2022-07-13 22:16:44,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:44,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:16:44,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:50,391 INFO L129 PetriNetUnfolder]: 2142/7671 cut-off events. [2022-07-13 22:16:50,391 INFO L130 PetriNetUnfolder]: For 144366/144368 co-relation queries the response was YES. [2022-07-13 22:16:50,461 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. [2022-07-13 22:16:50,528 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 379 selfloop transitions, 1797 changer transitions 2/2248 dead transitions. [2022-07-13 22:16:50,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 2248 transitions, 54906 flow [2022-07-13 22:16:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-13 22:16:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-13 22:16:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4497 transitions. [2022-07-13 22:16:50,536 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7872899159663865 [2022-07-13 22:16:50,536 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4497 transitions. [2022-07-13 22:16:50,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4497 transitions. [2022-07-13 22:16:50,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:50,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4497 transitions. [2022-07-13 22:16:50,545 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) [2022-07-13 22:16:50,553 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) [2022-07-13 22:16:50,554 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) [2022-07-13 22:16:50,554 INFO L186 Difference]: Start difference. First operand has 401 places, 1578 transitions, 35362 flow. Second operand 68 states and 4497 transitions. [2022-07-13 22:16:50,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 2248 transitions, 54906 flow [2022-07-13 22:16:52,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 2248 transitions, 53590 flow, removed 531 selfloop flow, removed 12 redundant places. [2022-07-13 22:16:52,489 INFO L242 Difference]: Finished difference. Result has 470 places, 2083 transitions, 52642 flow [2022-07-13 22:16:52,491 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} [2022-07-13 22:16:52,491 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 396 predicate places. [2022-07-13 22:16:52,492 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 2083 transitions, 52642 flow [2022-07-13 22:16:52,492 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) [2022-07-13 22:16:52,492 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:16:52,493 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] [2022-07-13 22:16:52,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 22:16:52,715 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 [2022-07-13 22:16:52,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:16:52,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:16:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1892612579, now seen corresponding path program 8 times [2022-07-13 22:16:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:16:52,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671454802] [2022-07-13 22:16:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:16:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:16:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:16:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:52,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:16:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671454802] [2022-07-13 22:16:52,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671454802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:16:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542594142] [2022-07-13 22:16:52,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:16:52,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:16:52,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:16:52,869 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) [2022-07-13 22:16:52,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:16:52,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:16:52,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:16:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:16:52,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:16:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:53,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:16:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:16:53,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542594142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:16:53,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:16:53,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-13 22:16:53,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266586883] [2022-07-13 22:16:53,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:16:53,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:16:53,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:16:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:16:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:16:53,695 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:16:53,696 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) [2022-07-13 22:16:53,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:16:53,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:16:53,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:16:58,748 INFO L129 PetriNetUnfolder]: 2244/7866 cut-off events. [2022-07-13 22:16:58,748 INFO L130 PetriNetUnfolder]: For 162615/162616 co-relation queries the response was YES. [2022-07-13 22:16:58,818 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. [2022-07-13 22:16:58,876 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 718 selfloop transitions, 1484 changer transitions 5/2277 dead transitions. [2022-07-13 22:16:58,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 2277 transitions, 61483 flow [2022-07-13 22:16:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 22:16:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-13 22:16:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2315 transitions. [2022-07-13 22:16:58,880 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7874149659863946 [2022-07-13 22:16:58,881 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2315 transitions. [2022-07-13 22:16:58,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2315 transitions. [2022-07-13 22:16:58,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:16:58,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2315 transitions. [2022-07-13 22:16:58,885 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) [2022-07-13 22:16:58,889 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) [2022-07-13 22:16:58,889 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) [2022-07-13 22:16:58,890 INFO L186 Difference]: Start difference. First operand has 470 places, 2083 transitions, 52642 flow. Second operand 35 states and 2315 transitions. [2022-07-13 22:16:58,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 2277 transitions, 61483 flow [2022-07-13 22:17:01,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2277 transitions, 61057 flow, removed 72 selfloop flow, removed 13 redundant places. [2022-07-13 22:17:01,286 INFO L242 Difference]: Finished difference. Result has 500 places, 2215 transitions, 61253 flow [2022-07-13 22:17:01,287 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} [2022-07-13 22:17:01,288 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 426 predicate places. [2022-07-13 22:17:01,288 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 2215 transitions, 61253 flow [2022-07-13 22:17:01,289 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) [2022-07-13 22:17:01,289 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:01,289 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] [2022-07-13 22:17:01,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:01,511 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 [2022-07-13 22:17:01,511 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:01,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1480356137, now seen corresponding path program 9 times [2022-07-13 22:17:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490033186] [2022-07-13 22:17:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490033186] [2022-07-13 22:17:01,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490033186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405122011] [2022-07-13 22:17:01,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:17:01,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:01,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:01,634 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) [2022-07-13 22:17:01,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:17:01,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 22:17:01,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:17:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:01,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:02,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405122011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:02,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:02,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-13 22:17:02,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042203629] [2022-07-13 22:17:02,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:02,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:17:02,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:17:02,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:17:02,443 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:17:02,444 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) [2022-07-13 22:17:02,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:02,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:17:02,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:08,954 INFO L129 PetriNetUnfolder]: 2495/8401 cut-off events. [2022-07-13 22:17:08,954 INFO L130 PetriNetUnfolder]: For 209693/209714 co-relation queries the response was YES. [2022-07-13 22:17:09,067 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. [2022-07-13 22:17:09,241 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 926 selfloop transitions, 1567 changer transitions 9/2572 dead transitions. [2022-07-13 22:17:09,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 2572 transitions, 75880 flow [2022-07-13 22:17:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-13 22:17:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-13 22:17:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2831 transitions. [2022-07-13 22:17:09,250 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837763012181617 [2022-07-13 22:17:09,250 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2831 transitions. [2022-07-13 22:17:09,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2831 transitions. [2022-07-13 22:17:09,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:09,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2831 transitions. [2022-07-13 22:17:09,259 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) [2022-07-13 22:17:09,266 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) [2022-07-13 22:17:09,267 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) [2022-07-13 22:17:09,267 INFO L186 Difference]: Start difference. First operand has 500 places, 2215 transitions, 61253 flow. Second operand 43 states and 2831 transitions. [2022-07-13 22:17:09,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 2572 transitions, 75880 flow [2022-07-13 22:17:12,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 2572 transitions, 75728 flow, removed 22 selfloop flow, removed 11 redundant places. [2022-07-13 22:17:12,478 INFO L242 Difference]: Finished difference. Result has 544 places, 2515 transitions, 75594 flow [2022-07-13 22:17:12,481 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} [2022-07-13 22:17:12,482 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 470 predicate places. [2022-07-13 22:17:12,482 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 2515 transitions, 75594 flow [2022-07-13 22:17:12,482 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) [2022-07-13 22:17:12,482 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:12,483 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] [2022-07-13 22:17:12,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:12,705 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 [2022-07-13 22:17:12,706 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -759106099, now seen corresponding path program 10 times [2022-07-13 22:17:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:12,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088536338] [2022-07-13 22:17:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:12,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:12,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:12,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088536338] [2022-07-13 22:17:12,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088536338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:12,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983004456] [2022-07-13 22:17:12,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:17:12,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:12,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:12,888 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) [2022-07-13 22:17:12,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:17:12,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:17:12,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:12,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:17:12,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:13,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:13,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983004456] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:13,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:13,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-13 22:17:13,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284695959] [2022-07-13 22:17:13,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:13,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:17:13,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:13,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:17:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:17:13,637 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:17:13,638 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) [2022-07-13 22:17:13,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:13,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:17:13,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:17:21,553 INFO L129 PetriNetUnfolder]: 2888/9474 cut-off events. [2022-07-13 22:17:21,553 INFO L130 PetriNetUnfolder]: For 286327/286354 co-relation queries the response was YES. [2022-07-13 22:17:21,672 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. [2022-07-13 22:17:21,760 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 632 selfloop transitions, 2339 changer transitions 11/3052 dead transitions. [2022-07-13 22:17:21,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 3052 transitions, 97974 flow [2022-07-13 22:17:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 22:17:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-13 22:17:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2629 transitions. [2022-07-13 22:17:21,765 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7824404761904762 [2022-07-13 22:17:21,765 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2629 transitions. [2022-07-13 22:17:21,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2629 transitions. [2022-07-13 22:17:21,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:17:21,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2629 transitions. [2022-07-13 22:17:21,770 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) [2022-07-13 22:17:21,773 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) [2022-07-13 22:17:21,773 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) [2022-07-13 22:17:21,774 INFO L186 Difference]: Start difference. First operand has 544 places, 2515 transitions, 75594 flow. Second operand 40 states and 2629 transitions. [2022-07-13 22:17:21,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 3052 transitions, 97974 flow [2022-07-13 22:17:26,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 3052 transitions, 97580 flow, removed 82 selfloop flow, removed 12 redundant places. [2022-07-13 22:17:26,490 INFO L242 Difference]: Finished difference. Result has 586 places, 2999 transitions, 99666 flow [2022-07-13 22:17:26,493 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} [2022-07-13 22:17:26,493 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 512 predicate places. [2022-07-13 22:17:26,493 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 2999 transitions, 99666 flow [2022-07-13 22:17:26,494 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) [2022-07-13 22:17:26,494 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:17:26,494 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] [2022-07-13 22:17:26,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 22:17:26,719 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 [2022-07-13 22:17:26,719 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:17:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:17:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 704273387, now seen corresponding path program 11 times [2022-07-13 22:17:26,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:17:26,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689829001] [2022-07-13 22:17:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:17:26,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:17:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:17:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:26,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:17:26,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689829001] [2022-07-13 22:17:26,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689829001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:17:26,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328640482] [2022-07-13 22:17:26,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:17:26,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:17:26,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:17:26,872 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) [2022-07-13 22:17:26,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 22:17:26,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:17:26,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:17:26,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:17:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:17:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:27,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:17:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:17:59,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328640482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:17:59,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:17:59,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-13 22:17:59,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472544550] [2022-07-13 22:17:59,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:17:59,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:17:59,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:17:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:17:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:17:59,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:17:59,798 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) [2022-07-13 22:17:59,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:17:59,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:17:59,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:09,886 INFO L129 PetriNetUnfolder]: 3092/9846 cut-off events. [2022-07-13 22:18:09,887 INFO L130 PetriNetUnfolder]: For 361400/361432 co-relation queries the response was YES. [2022-07-13 22:18:10,024 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. [2022-07-13 22:18:10,095 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 302 selfloop transitions, 2957 changer transitions 0/3329 dead transitions. [2022-07-13 22:18:10,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 3329 transitions, 116906 flow [2022-07-13 22:18:10,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 22:18:10,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-13 22:18:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2896 transitions. [2022-07-13 22:18:10,109 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7835497835497836 [2022-07-13 22:18:10,109 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2896 transitions. [2022-07-13 22:18:10,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2896 transitions. [2022-07-13 22:18:10,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:10,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2896 transitions. [2022-07-13 22:18:10,114 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) [2022-07-13 22:18:10,117 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) [2022-07-13 22:18:10,118 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) [2022-07-13 22:18:10,118 INFO L186 Difference]: Start difference. First operand has 586 places, 2999 transitions, 99666 flow. Second operand 44 states and 2896 transitions. [2022-07-13 22:18:10,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 3329 transitions, 116906 flow [2022-07-13 22:18:15,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 3329 transitions, 115731 flow, removed 209 selfloop flow, removed 17 redundant places. [2022-07-13 22:18:16,087 INFO L242 Difference]: Finished difference. Result has 614 places, 3282 transitions, 117795 flow [2022-07-13 22:18:16,089 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} [2022-07-13 22:18:16,090 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 540 predicate places. [2022-07-13 22:18:16,090 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 3282 transitions, 117795 flow [2022-07-13 22:18:16,090 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) [2022-07-13 22:18:16,090 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:16,090 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] [2022-07-13 22:18:16,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:16,291 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 [2022-07-13 22:18:16,291 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:16,291 INFO L85 PathProgramCache]: Analyzing trace with hash -604446607, now seen corresponding path program 12 times [2022-07-13 22:18:16,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:16,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033862620] [2022-07-13 22:18:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:16,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:16,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033862620] [2022-07-13 22:18:16,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033862620] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998810163] [2022-07-13 22:18:16,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:18:16,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:16,420 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) [2022-07-13 22:18:16,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 22:18:16,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 22:18:16,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:16,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:18:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:16,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:17,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998810163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:17,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:17,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-13 22:18:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030068903] [2022-07-13 22:18:17,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:17,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:18:17,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:18:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:18:17,130 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:18:17,131 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) [2022-07-13 22:18:17,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:17,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:18:17,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:27,614 INFO L129 PetriNetUnfolder]: 3222/10257 cut-off events. [2022-07-13 22:18:27,614 INFO L130 PetriNetUnfolder]: For 430924/430954 co-relation queries the response was YES. [2022-07-13 22:18:27,766 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. [2022-07-13 22:18:27,833 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 999 selfloop transitions, 2463 changer transitions 3/3535 dead transitions. [2022-07-13 22:18:27,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 3535 transitions, 133585 flow [2022-07-13 22:18:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 22:18:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 22:18:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1973 transitions. [2022-07-13 22:18:27,837 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7829365079365079 [2022-07-13 22:18:27,837 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1973 transitions. [2022-07-13 22:18:27,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1973 transitions. [2022-07-13 22:18:27,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:27,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1973 transitions. [2022-07-13 22:18:27,841 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) [2022-07-13 22:18:27,843 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) [2022-07-13 22:18:27,843 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) [2022-07-13 22:18:27,843 INFO L186 Difference]: Start difference. First operand has 614 places, 3282 transitions, 117795 flow. Second operand 30 states and 1973 transitions. [2022-07-13 22:18:27,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 3535 transitions, 133585 flow [2022-07-13 22:18:35,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 3535 transitions, 132967 flow, removed 100 selfloop flow, removed 18 redundant places. [2022-07-13 22:18:35,202 INFO L242 Difference]: Finished difference. Result has 632 places, 3504 transitions, 131162 flow [2022-07-13 22:18:35,204 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} [2022-07-13 22:18:35,205 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 558 predicate places. [2022-07-13 22:18:35,205 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 3504 transitions, 131162 flow [2022-07-13 22:18:35,205 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) [2022-07-13 22:18:35,205 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:35,206 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] [2022-07-13 22:18:35,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:35,415 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 [2022-07-13 22:18:35,415 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash 536604281, now seen corresponding path program 13 times [2022-07-13 22:18:35,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:35,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163514359] [2022-07-13 22:18:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:35,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:35,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163514359] [2022-07-13 22:18:35,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163514359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266667998] [2022-07-13 22:18:35,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:18:35,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:35,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:35,552 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) [2022-07-13 22:18:35,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 22:18:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:18:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:35,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:36,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266667998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:36,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:36,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-13 22:18:36,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824576076] [2022-07-13 22:18:36,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:36,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:18:36,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:18:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:18:36,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:18:36,216 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) [2022-07-13 22:18:36,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:36,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:18:36,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:18:48,304 INFO L129 PetriNetUnfolder]: 3418/10561 cut-off events. [2022-07-13 22:18:48,304 INFO L130 PetriNetUnfolder]: For 473269/473300 co-relation queries the response was YES. [2022-07-13 22:18:48,520 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. [2022-07-13 22:18:48,599 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 600 selfloop transitions, 3113 changer transitions 6/3789 dead transitions. [2022-07-13 22:18:48,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 3789 transitions, 148411 flow [2022-07-13 22:18:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 22:18:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-13 22:18:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3013 transitions. [2022-07-13 22:18:48,602 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2022-07-13 22:18:48,602 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3013 transitions. [2022-07-13 22:18:48,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3013 transitions. [2022-07-13 22:18:48,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:18:48,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3013 transitions. [2022-07-13 22:18:48,605 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) [2022-07-13 22:18:48,608 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) [2022-07-13 22:18:48,608 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) [2022-07-13 22:18:48,608 INFO L186 Difference]: Start difference. First operand has 632 places, 3504 transitions, 131162 flow. Second operand 46 states and 3013 transitions. [2022-07-13 22:18:48,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 3789 transitions, 148411 flow [2022-07-13 22:18:56,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 659 places, 3789 transitions, 147739 flow, removed 20 selfloop flow, removed 14 redundant places. [2022-07-13 22:18:57,032 INFO L242 Difference]: Finished difference. Result has 665 places, 3754 transitions, 148129 flow [2022-07-13 22:18:57,036 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} [2022-07-13 22:18:57,036 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 591 predicate places. [2022-07-13 22:18:57,037 INFO L495 AbstractCegarLoop]: Abstraction has has 665 places, 3754 transitions, 148129 flow [2022-07-13 22:18:57,037 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) [2022-07-13 22:18:57,037 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:18:57,037 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] [2022-07-13 22:18:57,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 22:18:57,261 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 [2022-07-13 22:18:57,262 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:18:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:18:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1706854467, now seen corresponding path program 14 times [2022-07-13 22:18:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:18:57,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016068031] [2022-07-13 22:18:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:18:57,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:18:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:18:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:57,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:18:57,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016068031] [2022-07-13 22:18:57,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016068031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:18:57,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205556249] [2022-07-13 22:18:57,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:18:57,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:18:57,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:18:57,391 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) [2022-07-13 22:18:57,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 22:18:57,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:18:57,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:18:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:18:57,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:18:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:57,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:18:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:18:57,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205556249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:18:57,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:18:57,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-07-13 22:18:57,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055253679] [2022-07-13 22:18:57,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:18:57,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:18:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:18:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:18:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:18:57,825 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:18:57,826 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) [2022-07-13 22:18:57,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:18:57,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:18:57,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:18,190 INFO L129 PetriNetUnfolder]: 4301/12895 cut-off events. [2022-07-13 22:19:18,190 INFO L130 PetriNetUnfolder]: For 656033/656033 co-relation queries the response was YES. [2022-07-13 22:19:18,384 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. [2022-07-13 22:19:18,482 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1561 selfloop transitions, 3626 changer transitions 18/5246 dead transitions. [2022-07-13 22:19:18,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 5246 transitions, 215224 flow [2022-07-13 22:19:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-13 22:19:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-13 22:19:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3957 transitions. [2022-07-13 22:19:18,486 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6634808853118712 [2022-07-13 22:19:18,486 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3957 transitions. [2022-07-13 22:19:18,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3957 transitions. [2022-07-13 22:19:18,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:18,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3957 transitions. [2022-07-13 22:19:18,492 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) [2022-07-13 22:19:18,497 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) [2022-07-13 22:19:18,498 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) [2022-07-13 22:19:18,498 INFO L186 Difference]: Start difference. First operand has 665 places, 3754 transitions, 148129 flow. Second operand 71 states and 3957 transitions. [2022-07-13 22:19:18,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 5246 transitions, 215224 flow [2022-07-13 22:19:30,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 5246 transitions, 211527 flow, removed 163 selfloop flow, removed 27 redundant places. [2022-07-13 22:19:30,235 INFO L242 Difference]: Finished difference. Result has 748 places, 4937 transitions, 206743 flow [2022-07-13 22:19:30,237 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} [2022-07-13 22:19:30,238 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 674 predicate places. [2022-07-13 22:19:30,238 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 4937 transitions, 206743 flow [2022-07-13 22:19:30,238 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) [2022-07-13 22:19:30,238 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:19:30,238 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] [2022-07-13 22:19:30,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 22:19:30,440 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 [2022-07-13 22:19:30,440 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:19:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:19:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1970329197, now seen corresponding path program 15 times [2022-07-13 22:19:30,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:19:30,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409846579] [2022-07-13 22:19:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:19:30,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:19:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:19:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:30,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:19:30,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409846579] [2022-07-13 22:19:30,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409846579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:19:30,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324076830] [2022-07-13 22:19:30,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:19:30,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:19:30,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:19:30,556 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) [2022-07-13 22:19:30,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 22:19:30,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 22:19:30,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:19:30,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:19:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:19:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:30,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:19:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:19:31,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324076830] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:19:31,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:19:31,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-07-13 22:19:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452580758] [2022-07-13 22:19:31,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:19:31,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:19:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:19:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:19:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:19:31,170 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:19:31,171 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) [2022-07-13 22:19:31,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:19:31,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:19:31,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:19:54,358 INFO L129 PetriNetUnfolder]: 4519/13126 cut-off events. [2022-07-13 22:19:54,358 INFO L130 PetriNetUnfolder]: For 797599/797640 co-relation queries the response was YES. [2022-07-13 22:19:54,605 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. [2022-07-13 22:19:54,713 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 2000 selfloop transitions, 3159 changer transitions 8/5295 dead transitions. [2022-07-13 22:19:54,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 5295 transitions, 233117 flow [2022-07-13 22:19:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 22:19:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-13 22:19:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1665 transitions. [2022-07-13 22:19:54,715 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928571428571428 [2022-07-13 22:19:54,715 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1665 transitions. [2022-07-13 22:19:54,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1665 transitions. [2022-07-13 22:19:54,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:19:54,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1665 transitions. [2022-07-13 22:19:54,718 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) [2022-07-13 22:19:54,720 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) [2022-07-13 22:19:54,720 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) [2022-07-13 22:19:54,720 INFO L186 Difference]: Start difference. First operand has 748 places, 4937 transitions, 206743 flow. Second operand 25 states and 1665 transitions. [2022-07-13 22:19:54,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 5295 transitions, 233117 flow [2022-07-13 22:20:11,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 5295 transitions, 231817 flow, removed 611 selfloop flow, removed 6 redundant places. [2022-07-13 22:20:11,870 INFO L242 Difference]: Finished difference. Result has 769 places, 5236 transitions, 232025 flow [2022-07-13 22:20:11,873 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} [2022-07-13 22:20:11,874 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 695 predicate places. [2022-07-13 22:20:11,874 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 5236 transitions, 232025 flow [2022-07-13 22:20:11,874 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) [2022-07-13 22:20:11,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:11,874 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] [2022-07-13 22:20:11,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-13 22:20:12,075 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 [2022-07-13 22:20:12,075 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:20:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1026929679, now seen corresponding path program 16 times [2022-07-13 22:20:12,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:12,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011098927] [2022-07-13 22:20:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:12,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:12,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:12,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011098927] [2022-07-13 22:20:12,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011098927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:12,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72165560] [2022-07-13 22:20:12,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:20:12,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:12,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:12,256 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) [2022-07-13 22:20:12,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 22:20:12,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:20:12,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:12,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:20:12,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:12,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:13,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72165560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:13,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:13,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-07-13 22:20:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178785470] [2022-07-13 22:20:13,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:13,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:20:13,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:13,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:20:13,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:20:13,023 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-07-13 22:20:13,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 5236 transitions, 232025 flow. Second operand has 19 states, 19 states have (on average 64.21052631578948) internal successors, (1220), 19 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:13,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:13,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-07-13 22:20:13,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand