./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-mult-equiv.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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:40:16,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:40:16,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:40:16,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:40:16,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:40:16,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:40:16,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:40:16,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:40:16,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:40:16,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:40:16,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:40:16,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:40:16,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:40:16,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:40:16,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:40:16,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:40:16,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:40:16,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:40:16,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:40:16,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:40:16,739 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:40:16,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:40:16,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:40:16,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:40:16,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:40:16,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:40:16,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:40:16,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:40:16,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:40:16,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:40:16,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:40:16,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:40:16,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:40:16,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:40:16,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:40:16,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:40:16,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:40:16,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:40:16,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:40:16,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:40:16,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:40:16,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:40:16,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:40:16,790 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:40:16,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:40:16,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:40:16,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:40:16,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:40:16,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:40:16,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:40:16,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:40:16,793 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:40:16,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:40:16,793 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:40:16,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:40:16,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:40:16,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:40:16,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:40:16,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:40:16,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:40:16,795 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:40:16,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:40:16,795 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:40:16,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:40:16,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:40:16,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:40:16,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:40:16,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:40:16,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:40:16,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:40:16,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:40:16,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:40:16,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:40:16,797 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:40:16,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:40:16,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:40:16,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2022-07-19 21:40:17,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:40:17,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:40:17,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:40:17,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:40:17,042 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:40:17,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-19 21:40:17,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3be8ebf1/9b86f942fa6144cbb7efcf4f7ccafb57/FLAGf8b294d16 [2022-07-19 21:40:17,555 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:40:17,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-19 21:40:17,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3be8ebf1/9b86f942fa6144cbb7efcf4f7ccafb57/FLAGf8b294d16 [2022-07-19 21:40:17,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3be8ebf1/9b86f942fa6144cbb7efcf4f7ccafb57 [2022-07-19 21:40:17,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:40:17,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:40:17,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:40:17,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:40:17,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:40:17,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30dfcc94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17, skipping insertion in model container [2022-07-19 21:40:17,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:40:17,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:40:17,787 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-mult-equiv.wvr.c[2591,2604] [2022-07-19 21:40:17,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:40:17,797 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:40:17,817 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-mult-equiv.wvr.c[2591,2604] [2022-07-19 21:40:17,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:40:17,829 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:40:17,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17 WrapperNode [2022-07-19 21:40:17,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:40:17,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:40:17,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:40:17,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:40:17,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,860 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-07-19 21:40:17,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:40:17,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:40:17,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:40:17,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:40:17,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:40:17,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:40:17,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:40:17,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:40:17,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (1/1) ... [2022-07-19 21:40:17,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:40:17,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:17,922 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) [2022-07-19 21:40:17,924 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 [2022-07-19 21:40:17,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:40:17,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:40:17,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:40:17,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:40:17,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:40:17,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:40:17,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:40:17,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:40:17,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:40:17,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:40:17,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:40:17,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:40:17,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:40:17,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:40:17,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:40:17,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:40:17,953 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:40:18,018 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:40:18,020 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:40:18,232 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:40:18,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:40:18,305 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:40:18,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:40:18 BoogieIcfgContainer [2022-07-19 21:40:18,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:40:18,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:40:18,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:40:18,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:40:18,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:40:17" (1/3) ... [2022-07-19 21:40:18,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5483ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:40:18, skipping insertion in model container [2022-07-19 21:40:18,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:40:17" (2/3) ... [2022-07-19 21:40:18,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5483ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:40:18, skipping insertion in model container [2022-07-19 21:40:18,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:40:18" (3/3) ... [2022-07-19 21:40:18,320 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-07-19 21:40:18,331 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:40:18,341 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:40:18,341 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:40:18,341 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:40:18,409 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:40:18,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-07-19 21:40:18,479 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-07-19 21:40:18,479 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:40:18,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-07-19 21:40:18,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-07-19 21:40:18,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-07-19 21:40:18,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:40:18,502 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@136f37fd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4851211c [2022-07-19 21:40:18,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:40:18,525 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2022-07-19 21:40:18,525 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:40:18,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:18,526 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, 1, 1, 1] [2022-07-19 21:40:18,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1408875064, now seen corresponding path program 1 times [2022-07-19 21:40:18,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154375091] [2022-07-19 21:40:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:18,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:18,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:18,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154375091] [2022-07-19 21:40:18,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154375091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:18,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:18,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:40:18,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914078024] [2022-07-19 21:40:18,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:18,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:40:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:18,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:40:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:40:18,841 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-07-19 21:40:18,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:18,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:18,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-07-19 21:40:18,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:18,939 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2022-07-19 21:40:18,939 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-07-19 21:40:18,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 254 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-07-19 21:40:18,942 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-07-19 21:40:18,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-07-19 21:40:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:40:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:40:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-07-19 21:40:18,962 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-07-19 21:40:18,964 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-07-19 21:40:18,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-07-19 21:40:18,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:18,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-07-19 21:40:18,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:18,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:18,983 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:18,985 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-07-19 21:40:18,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-07-19 21:40:18,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:40:18,996 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-07-19 21:40:18,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-07-19 21:40:19,002 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-07-19 21:40:19,002 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-07-19 21:40:19,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:19,003 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:19,004 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, 1, 1, 1] [2022-07-19 21:40:19,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:40:19,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1685090523, now seen corresponding path program 1 times [2022-07-19 21:40:19,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:19,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427650772] [2022-07-19 21:40:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:19,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:19,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:19,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427650772] [2022-07-19 21:40:19,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427650772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:19,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:19,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:40:19,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925464463] [2022-07-19 21:40:19,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:19,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:19,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:19,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:19,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:40:19,262 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-07-19 21:40:19,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:19,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:19,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-07-19 21:40:19,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:19,408 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2022-07-19 21:40:19,409 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-07-19 21:40:19,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 483 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-07-19 21:40:19,415 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-07-19 21:40:19,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-07-19 21:40:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-07-19 21:40:19,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-07-19 21:40:19,425 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-07-19 21:40:19,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-07-19 21:40:19,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:19,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-07-19 21:40:19,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:19,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:19,435 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:19,435 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-07-19 21:40:19,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-07-19 21:40:19,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:40:19,439 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-07-19 21:40:19,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-07-19 21:40:19,440 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-07-19 21:40:19,441 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-07-19 21:40:19,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:19,442 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:19,442 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, 1, 1, 1, 1, 1] [2022-07-19 21:40:19,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:40:19,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:19,451 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-07-19 21:40:19,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:19,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236472023] [2022-07-19 21:40:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:19,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:19,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:19,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236472023] [2022-07-19 21:40:19,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236472023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:19,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:19,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:40:19,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960033069] [2022-07-19 21:40:19,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:19,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:19,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:19,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:19,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:40:19,704 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-19 21:40:19,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:19,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:19,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-19 21:40:19,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:20,040 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2022-07-19 21:40:20,040 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-07-19 21:40:20,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4076 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-07-19 21:40:20,047 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-07-19 21:40:20,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-07-19 21:40:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:40:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:40:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-07-19 21:40:20,050 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-07-19 21:40:20,050 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-07-19 21:40:20,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-07-19 21:40:20,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:20,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-07-19 21:40:20,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,056 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,056 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-07-19 21:40:20,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-07-19 21:40:20,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-19 21:40:20,060 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-07-19 21:40:20,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-07-19 21:40:20,061 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-07-19 21:40:20,062 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-07-19 21:40:20,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,062 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:20,063 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, 1, 1, 1, 1, 1] [2022-07-19 21:40:20,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:40:20,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:20,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1580608891, now seen corresponding path program 2 times [2022-07-19 21:40:20,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:20,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7186547] [2022-07-19 21:40:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:20,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:20,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:20,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7186547] [2022-07-19 21:40:20,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7186547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:20,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:20,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:20,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239183124] [2022-07-19 21:40:20,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:20,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:20,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:20,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:20,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-19 21:40:20,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:20,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-19 21:40:20,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:20,354 INFO L129 PetriNetUnfolder]: 371/890 cut-off events. [2022-07-19 21:40:20,355 INFO L130 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-07-19 21:40:20,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4794 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-07-19 21:40:20,363 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-07-19 21:40:20,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-07-19 21:40:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-07-19 21:40:20,365 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-07-19 21:40:20,365 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-07-19 21:40:20,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-07-19 21:40:20,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:20,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-07-19 21:40:20,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,370 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,370 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-07-19 21:40:20,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-07-19 21:40:20,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:40:20,376 INFO L242 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-07-19 21:40:20,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-07-19 21:40:20,377 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-07-19 21:40:20,377 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-07-19 21:40:20,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,378 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:20,378 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, 1, 1, 1, 1, 1] [2022-07-19 21:40:20,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:40:20,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:20,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:20,379 INFO L85 PathProgramCache]: Analyzing trace with hash -599492455, now seen corresponding path program 3 times [2022-07-19 21:40:20,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:20,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850498779] [2022-07-19 21:40:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:20,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:20,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:20,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850498779] [2022-07-19 21:40:20,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850498779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:20,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:20,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:40:20,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697934186] [2022-07-19 21:40:20,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:20,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:20,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:40:20,509 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-19 21:40:20,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:20,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-19 21:40:20,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:20,886 INFO L129 PetriNetUnfolder]: 576/1349 cut-off events. [2022-07-19 21:40:20,886 INFO L130 PetriNetUnfolder]: For 998/1042 co-relation queries the response was YES. [2022-07-19 21:40:20,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1349 events. 576/1349 cut-off events. For 998/1042 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8232 event pairs, 89 based on Foata normal form. 19/1297 useless extension candidates. Maximal degree in co-relation 3275. Up to 389 conditions per place. [2022-07-19 21:40:20,900 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-07-19 21:40:20,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-07-19 21:40:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:40:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:40:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-07-19 21:40:20,903 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-07-19 21:40:20,903 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-07-19 21:40:20,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-07-19 21:40:20,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:20,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-07-19 21:40:20,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,908 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,908 INFO L186 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-07-19 21:40:20,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-07-19 21:40:20,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-19 21:40:20,916 INFO L242 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-07-19 21:40:20,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-07-19 21:40:20,917 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-07-19 21:40:20,917 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-07-19 21:40:20,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:20,918 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:20,918 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, 1, 1, 1, 1, 1] [2022-07-19 21:40:20,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:40:20,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1430121317, now seen corresponding path program 4 times [2022-07-19 21:40:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:20,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566132025] [2022-07-19 21:40:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:20,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:21,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:21,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566132025] [2022-07-19 21:40:21,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566132025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:21,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:21,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:40:21,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17060032] [2022-07-19 21:40:21,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:21,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:21,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:40:21,043 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-19 21:40:21,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:21,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-19 21:40:21,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:21,333 INFO L129 PetriNetUnfolder]: 594/1403 cut-off events. [2022-07-19 21:40:21,334 INFO L130 PetriNetUnfolder]: For 2229/2242 co-relation queries the response was YES. [2022-07-19 21:40:21,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3959 conditions, 1403 events. 594/1403 cut-off events. For 2229/2242 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8721 event pairs, 155 based on Foata normal form. 16/1316 useless extension candidates. Maximal degree in co-relation 3938. Up to 527 conditions per place. [2022-07-19 21:40:21,353 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-07-19 21:40:21,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-07-19 21:40:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:40:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:40:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-07-19 21:40:21,356 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-07-19 21:40:21,356 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-07-19 21:40:21,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-07-19 21:40:21,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:21,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-07-19 21:40:21,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,361 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,361 INFO L186 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-07-19 21:40:21,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-07-19 21:40:21,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-19 21:40:21,375 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-07-19 21:40:21,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-07-19 21:40:21,376 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-07-19 21:40:21,376 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-07-19 21:40:21,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,377 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:21,377 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:21,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:40:21,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash -829555728, now seen corresponding path program 1 times [2022-07-19 21:40:21,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:21,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380886563] [2022-07-19 21:40:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:21,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:21,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380886563] [2022-07-19 21:40:21,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380886563] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:21,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:21,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:40:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232314833] [2022-07-19 21:40:21,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:21,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:40:21,535 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-19 21:40:21,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:21,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-19 21:40:21,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:21,899 INFO L129 PetriNetUnfolder]: 671/1538 cut-off events. [2022-07-19 21:40:21,900 INFO L130 PetriNetUnfolder]: For 3129/3163 co-relation queries the response was YES. [2022-07-19 21:40:21,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4709 conditions, 1538 events. 671/1538 cut-off events. For 3129/3163 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9727 event pairs, 131 based on Foata normal form. 28/1481 useless extension candidates. Maximal degree in co-relation 4684. Up to 579 conditions per place. [2022-07-19 21:40:21,915 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 82 selfloop transitions, 30 changer transitions 2/171 dead transitions. [2022-07-19 21:40:21,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 1312 flow [2022-07-19 21:40:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:40:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:40:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2022-07-19 21:40:21,918 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2022-07-19 21:40:21,918 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2022-07-19 21:40:21,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2022-07-19 21:40:21,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:21,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2022-07-19 21:40:21,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,922 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,922 INFO L186 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 7 states and 562 transitions. [2022-07-19 21:40:21,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 1312 flow [2022-07-19 21:40:21,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1228 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-19 21:40:21,936 INFO L242 Difference]: Finished difference. Result has 129 places, 131 transitions, 889 flow [2022-07-19 21:40:21,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2022-07-19 21:40:21,937 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2022-07-19 21:40:21,937 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 889 flow [2022-07-19 21:40:21,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:21,937 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:21,938 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:21,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:40:21,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:21,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1761321142, now seen corresponding path program 2 times [2022-07-19 21:40:21,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:21,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807684326] [2022-07-19 21:40:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:21,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:22,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:22,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807684326] [2022-07-19 21:40:22,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807684326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:22,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:22,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:40:22,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013455482] [2022-07-19 21:40:22,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:22,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:40:22,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:22,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:40:22,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:40:22,206 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-19 21:40:22,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 889 flow. Second operand has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:22,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:22,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-19 21:40:22,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:23,112 INFO L129 PetriNetUnfolder]: 1609/3278 cut-off events. [2022-07-19 21:40:23,113 INFO L130 PetriNetUnfolder]: For 9722/9800 co-relation queries the response was YES. [2022-07-19 21:40:23,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11498 conditions, 3278 events. 1609/3278 cut-off events. For 9722/9800 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23364 event pairs, 512 based on Foata normal form. 9/3005 useless extension candidates. Maximal degree in co-relation 11470. Up to 1864 conditions per place. [2022-07-19 21:40:23,155 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 114 selfloop transitions, 60 changer transitions 6/235 dead transitions. [2022-07-19 21:40:23,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 235 transitions, 2127 flow [2022-07-19 21:40:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:40:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:40:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 722 transitions. [2022-07-19 21:40:23,158 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.827033218785796 [2022-07-19 21:40:23,159 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 722 transitions. [2022-07-19 21:40:23,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 722 transitions. [2022-07-19 21:40:23,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:23,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 722 transitions. [2022-07-19 21:40:23,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.22222222222223) internal successors, (722), 9 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:23,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:23,164 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:23,164 INFO L186 Difference]: Start difference. First operand has 129 places, 131 transitions, 889 flow. Second operand 9 states and 722 transitions. [2022-07-19 21:40:23,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 235 transitions, 2127 flow [2022-07-19 21:40:23,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 235 transitions, 2076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:40:23,205 INFO L242 Difference]: Finished difference. Result has 142 places, 168 transitions, 1575 flow [2022-07-19 21:40:23,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1575, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2022-07-19 21:40:23,207 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 56 predicate places. [2022-07-19 21:40:23,207 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1575 flow [2022-07-19 21:40:23,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:23,207 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:23,208 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:23,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:40:23,208 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:23,209 INFO L85 PathProgramCache]: Analyzing trace with hash 133163824, now seen corresponding path program 1 times [2022-07-19 21:40:23,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:23,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206114165] [2022-07-19 21:40:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:23,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:23,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206114165] [2022-07-19 21:40:23,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206114165] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:23,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:23,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:23,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560323954] [2022-07-19 21:40:23,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:23,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:23,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:23,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:23,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:23,283 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-19 21:40:23,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1575 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:23,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:23,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-19 21:40:23,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:23,879 INFO L129 PetriNetUnfolder]: 1323/3152 cut-off events. [2022-07-19 21:40:23,879 INFO L130 PetriNetUnfolder]: For 11002/11304 co-relation queries the response was YES. [2022-07-19 21:40:23,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11658 conditions, 3152 events. 1323/3152 cut-off events. For 11002/11304 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25036 event pairs, 262 based on Foata normal form. 96/3141 useless extension candidates. Maximal degree in co-relation 11623. Up to 1104 conditions per place. [2022-07-19 21:40:23,918 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 64 selfloop transitions, 65 changer transitions 2/200 dead transitions. [2022-07-19 21:40:23,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 200 transitions, 1998 flow [2022-07-19 21:40:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-19 21:40:23,921 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-19 21:40:23,921 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-19 21:40:23,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-19 21:40:23,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:23,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-19 21:40:23,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:23,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:23,924 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:23,925 INFO L186 Difference]: Start difference. First operand has 142 places, 168 transitions, 1575 flow. Second operand 6 states and 486 transitions. [2022-07-19 21:40:23,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 200 transitions, 1998 flow [2022-07-19 21:40:23,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 1946 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:40:23,985 INFO L242 Difference]: Finished difference. Result has 147 places, 173 transitions, 1774 flow [2022-07-19 21:40:23,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1774, PETRI_PLACES=147, PETRI_TRANSITIONS=173} [2022-07-19 21:40:23,986 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 61 predicate places. [2022-07-19 21:40:23,986 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 173 transitions, 1774 flow [2022-07-19 21:40:23,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:23,987 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:23,987 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:23,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:40:23,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:23,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:23,988 INFO L85 PathProgramCache]: Analyzing trace with hash -695560766, now seen corresponding path program 2 times [2022-07-19 21:40:23,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:23,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97135579] [2022-07-19 21:40:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:24,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97135579] [2022-07-19 21:40:24,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97135579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:24,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:24,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:24,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703866774] [2022-07-19 21:40:24,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:24,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:24,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:24,091 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-19 21:40:24,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 173 transitions, 1774 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:24,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:24,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-19 21:40:24,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:24,590 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][177], [Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 225#true, 106#true, Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= ~N~0 ~L~0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (< (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 150#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 238#true]) [2022-07-19 21:40:24,590 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-19 21:40:24,590 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-19 21:40:24,591 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-19 21:40:24,591 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-19 21:40:24,790 INFO L129 PetriNetUnfolder]: 1649/3706 cut-off events. [2022-07-19 21:40:24,791 INFO L130 PetriNetUnfolder]: For 18241/18640 co-relation queries the response was YES. [2022-07-19 21:40:24,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15719 conditions, 3706 events. 1649/3706 cut-off events. For 18241/18640 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 29394 event pairs, 179 based on Foata normal form. 127/3712 useless extension candidates. Maximal degree in co-relation 15682. Up to 1319 conditions per place. [2022-07-19 21:40:24,856 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 123 selfloop transitions, 105 changer transitions 2/299 dead transitions. [2022-07-19 21:40:24,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 299 transitions, 3896 flow [2022-07-19 21:40:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 491 transitions. [2022-07-19 21:40:24,858 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8436426116838488 [2022-07-19 21:40:24,858 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 491 transitions. [2022-07-19 21:40:24,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 491 transitions. [2022-07-19 21:40:24,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:24,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 491 transitions. [2022-07-19 21:40:24,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.83333333333333) internal successors, (491), 6 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:24,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:24,862 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:24,862 INFO L186 Difference]: Start difference. First operand has 147 places, 173 transitions, 1774 flow. Second operand 6 states and 491 transitions. [2022-07-19 21:40:24,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 299 transitions, 3896 flow [2022-07-19 21:40:24,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 299 transitions, 3726 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-07-19 21:40:24,949 INFO L242 Difference]: Finished difference. Result has 154 places, 232 transitions, 2918 flow [2022-07-19 21:40:24,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2918, PETRI_PLACES=154, PETRI_TRANSITIONS=232} [2022-07-19 21:40:24,952 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 68 predicate places. [2022-07-19 21:40:24,952 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 232 transitions, 2918 flow [2022-07-19 21:40:24,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:24,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:24,953 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:24,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:40:24,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:24,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:24,954 INFO L85 PathProgramCache]: Analyzing trace with hash 140530238, now seen corresponding path program 3 times [2022-07-19 21:40:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:24,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164027340] [2022-07-19 21:40:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:24,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:25,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:25,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164027340] [2022-07-19 21:40:25,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164027340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:25,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:25,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:25,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49486] [2022-07-19 21:40:25,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:25,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:25,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:25,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:25,119 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-19 21:40:25,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 232 transitions, 2918 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:25,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:25,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-19 21:40:25,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:25,778 INFO L129 PetriNetUnfolder]: 1623/3657 cut-off events. [2022-07-19 21:40:25,779 INFO L130 PetriNetUnfolder]: For 20724/20780 co-relation queries the response was YES. [2022-07-19 21:40:25,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16891 conditions, 3657 events. 1623/3657 cut-off events. For 20724/20780 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28431 event pairs, 389 based on Foata normal form. 14/3562 useless extension candidates. Maximal degree in co-relation 16850. Up to 2302 conditions per place. [2022-07-19 21:40:25,896 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 121 selfloop transitions, 71 changer transitions 1/253 dead transitions. [2022-07-19 21:40:25,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 253 transitions, 3482 flow [2022-07-19 21:40:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:40:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:40:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2022-07-19 21:40:25,898 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-19 21:40:25,899 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2022-07-19 21:40:25,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2022-07-19 21:40:25,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:25,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2022-07-19 21:40:25,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:25,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:25,903 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:25,903 INFO L186 Difference]: Start difference. First operand has 154 places, 232 transitions, 2918 flow. Second operand 5 states and 405 transitions. [2022-07-19 21:40:25,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 253 transitions, 3482 flow [2022-07-19 21:40:25,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 253 transitions, 3448 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-07-19 21:40:25,984 INFO L242 Difference]: Finished difference. Result has 160 places, 235 transitions, 3178 flow [2022-07-19 21:40:25,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3178, PETRI_PLACES=160, PETRI_TRANSITIONS=235} [2022-07-19 21:40:25,986 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 74 predicate places. [2022-07-19 21:40:25,986 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 235 transitions, 3178 flow [2022-07-19 21:40:25,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:25,986 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:25,987 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:25,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:40:25,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash 540547268, now seen corresponding path program 3 times [2022-07-19 21:40:25,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:25,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004397398] [2022-07-19 21:40:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:25,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:26,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:26,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004397398] [2022-07-19 21:40:26,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004397398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:26,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:26,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351804757] [2022-07-19 21:40:26,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:26,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:26,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:26,162 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-19 21:40:26,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 235 transitions, 3178 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:26,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:26,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-19 21:40:26,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:26,636 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][179], [Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 260#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 257#(and (= ~N~0 ~L~0) (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), 106#true, Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= ~N~0 ~L~0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), 264#true, Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (< (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 150#true, 254#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 240#(or (and (= (* (- 1) thread2Thread1of1ForFork1_~cond~1) 0) (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (and (= (+ (* (- 1) thread2Thread1of1ForFork1_~cond~1) 1) 0) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))))), 238#true, Black: 244#(and (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 242#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 246#(and (= thread1Thread1of1ForFork0_~cond~0 1) (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1))]) [2022-07-19 21:40:26,637 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-19 21:40:26,637 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-19 21:40:26,637 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-19 21:40:26,637 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-19 21:40:26,951 INFO L129 PetriNetUnfolder]: 1860/4309 cut-off events. [2022-07-19 21:40:26,951 INFO L130 PetriNetUnfolder]: For 24798/25309 co-relation queries the response was YES. [2022-07-19 21:40:26,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19625 conditions, 4309 events. 1860/4309 cut-off events. For 24798/25309 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36049 event pairs, 229 based on Foata normal form. 143/4307 useless extension candidates. Maximal degree in co-relation 19581. Up to 1429 conditions per place. [2022-07-19 21:40:27,006 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 95 selfloop transitions, 131 changer transitions 3/298 dead transitions. [2022-07-19 21:40:27,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 298 transitions, 4405 flow [2022-07-19 21:40:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:40:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:40:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2022-07-19 21:40:27,009 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8536082474226804 [2022-07-19 21:40:27,009 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2022-07-19 21:40:27,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2022-07-19 21:40:27,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:27,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2022-07-19 21:40:27,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,013 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,013 INFO L186 Difference]: Start difference. First operand has 160 places, 235 transitions, 3178 flow. Second operand 5 states and 414 transitions. [2022-07-19 21:40:27,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 298 transitions, 4405 flow [2022-07-19 21:40:27,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 298 transitions, 4325 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-19 21:40:27,098 INFO L242 Difference]: Finished difference. Result has 166 places, 266 transitions, 4115 flow [2022-07-19 21:40:27,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4115, PETRI_PLACES=166, PETRI_TRANSITIONS=266} [2022-07-19 21:40:27,100 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2022-07-19 21:40:27,101 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 266 transitions, 4115 flow [2022-07-19 21:40:27,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,101 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:27,101 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:27,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:40:27,102 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:27,102 INFO L85 PathProgramCache]: Analyzing trace with hash -346743856, now seen corresponding path program 4 times [2022-07-19 21:40:27,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:27,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449741961] [2022-07-19 21:40:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:27,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:27,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:27,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449741961] [2022-07-19 21:40:27,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449741961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:27,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:27,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:27,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148887771] [2022-07-19 21:40:27,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:27,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:27,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:27,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:27,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:27,234 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-19 21:40:27,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 266 transitions, 4115 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:27,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:27,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-19 21:40:27,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:28,143 INFO L129 PetriNetUnfolder]: 1950/4789 cut-off events. [2022-07-19 21:40:28,143 INFO L130 PetriNetUnfolder]: For 35999/36593 co-relation queries the response was YES. [2022-07-19 21:40:28,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22906 conditions, 4789 events. 1950/4789 cut-off events. For 35999/36593 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 42268 event pairs, 237 based on Foata normal form. 151/4795 useless extension candidates. Maximal degree in co-relation 22859. Up to 1635 conditions per place. [2022-07-19 21:40:28,211 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 84 selfloop transitions, 167 changer transitions 9/329 dead transitions. [2022-07-19 21:40:28,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 329 transitions, 5409 flow [2022-07-19 21:40:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 495 transitions. [2022-07-19 21:40:28,214 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8505154639175257 [2022-07-19 21:40:28,214 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 495 transitions. [2022-07-19 21:40:28,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 495 transitions. [2022-07-19 21:40:28,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:28,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 495 transitions. [2022-07-19 21:40:28,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:28,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:28,217 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:28,217 INFO L186 Difference]: Start difference. First operand has 166 places, 266 transitions, 4115 flow. Second operand 6 states and 495 transitions. [2022-07-19 21:40:28,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 329 transitions, 5409 flow [2022-07-19 21:40:28,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 329 transitions, 5381 flow, removed 14 selfloop flow, removed 0 redundant places. [2022-07-19 21:40:28,358 INFO L242 Difference]: Finished difference. Result has 174 places, 286 transitions, 4936 flow [2022-07-19 21:40:28,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4936, PETRI_PLACES=174, PETRI_TRANSITIONS=286} [2022-07-19 21:40:28,360 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2022-07-19 21:40:28,360 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 286 transitions, 4936 flow [2022-07-19 21:40:28,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:28,360 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:28,360 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:28,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:40:28,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:28,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1395758734, now seen corresponding path program 5 times [2022-07-19 21:40:28,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:28,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554442104] [2022-07-19 21:40:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:28,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:28,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:28,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554442104] [2022-07-19 21:40:28,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554442104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:28,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701082839] [2022-07-19 21:40:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:40:28,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:28,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:28,510 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) [2022-07-19 21:40:28,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:40:28,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:40:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:28,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:40:28,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:29,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:29,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701082839] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:29,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:40:29,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-19 21:40:29,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354512413] [2022-07-19 21:40:29,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:29,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:29,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:29,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:29,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:40:29,259 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-19 21:40:29,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 286 transitions, 4936 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:29,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:29,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-19 21:40:29,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:31,056 INFO L129 PetriNetUnfolder]: 3895/9307 cut-off events. [2022-07-19 21:40:31,056 INFO L130 PetriNetUnfolder]: For 81067/81102 co-relation queries the response was YES. [2022-07-19 21:40:31,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46008 conditions, 9307 events. 3895/9307 cut-off events. For 81067/81102 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 89826 event pairs, 453 based on Foata normal form. 34/9161 useless extension candidates. Maximal degree in co-relation 45957. Up to 1710 conditions per place. [2022-07-19 21:40:31,177 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 388 selfloop transitions, 167 changer transitions 4/614 dead transitions. [2022-07-19 21:40:31,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 614 transitions, 11347 flow [2022-07-19 21:40:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:40:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:40:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2022-07-19 21:40:31,180 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2022-07-19 21:40:31,180 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2022-07-19 21:40:31,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2022-07-19 21:40:31,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:31,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2022-07-19 21:40:31,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:31,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:31,184 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:31,185 INFO L186 Difference]: Start difference. First operand has 174 places, 286 transitions, 4936 flow. Second operand 7 states and 573 transitions. [2022-07-19 21:40:31,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 614 transitions, 11347 flow [2022-07-19 21:40:31,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 614 transitions, 11207 flow, removed 70 selfloop flow, removed 0 redundant places. [2022-07-19 21:40:31,447 INFO L242 Difference]: Finished difference. Result has 185 places, 413 transitions, 7730 flow [2022-07-19 21:40:31,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7730, PETRI_PLACES=185, PETRI_TRANSITIONS=413} [2022-07-19 21:40:31,449 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 99 predicate places. [2022-07-19 21:40:31,449 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 413 transitions, 7730 flow [2022-07-19 21:40:31,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:31,450 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:31,450 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:31,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:31,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 21:40:31,672 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:31,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash 559220224, now seen corresponding path program 6 times [2022-07-19 21:40:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:31,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901069539] [2022-07-19 21:40:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:31,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:31,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901069539] [2022-07-19 21:40:31,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901069539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306181213] [2022-07-19 21:40:31,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:40:31,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:31,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:31,876 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) [2022-07-19 21:40:31,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:40:31,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:40:31,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:31,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:40:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:32,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:32,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306181213] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:32,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:40:32,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-19 21:40:32,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488043786] [2022-07-19 21:40:32,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:32,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:32,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:40:32,371 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-19 21:40:32,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 413 transitions, 7730 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:32,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:32,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-19 21:40:32,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:34,191 INFO L129 PetriNetUnfolder]: 4074/9522 cut-off events. [2022-07-19 21:40:34,192 INFO L130 PetriNetUnfolder]: For 106901/106901 co-relation queries the response was YES. [2022-07-19 21:40:34,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54464 conditions, 9522 events. 4074/9522 cut-off events. For 106901/106901 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 91322 event pairs, 499 based on Foata normal form. 6/9409 useless extension candidates. Maximal degree in co-relation 54408. Up to 2947 conditions per place. [2022-07-19 21:40:34,314 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 296 selfloop transitions, 219 changer transitions 4/574 dead transitions. [2022-07-19 21:40:34,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 574 transitions, 11140 flow [2022-07-19 21:40:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:40:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:40:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2022-07-19 21:40:34,317 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2022-07-19 21:40:34,317 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2022-07-19 21:40:34,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2022-07-19 21:40:34,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:34,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2022-07-19 21:40:34,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:34,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:34,320 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:34,321 INFO L186 Difference]: Start difference. First operand has 185 places, 413 transitions, 7730 flow. Second operand 7 states and 570 transitions. [2022-07-19 21:40:34,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 574 transitions, 11140 flow [2022-07-19 21:40:34,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 574 transitions, 11033 flow, removed 47 selfloop flow, removed 1 redundant places. [2022-07-19 21:40:34,717 INFO L242 Difference]: Finished difference. Result has 196 places, 449 transitions, 9123 flow [2022-07-19 21:40:34,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7637, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9123, PETRI_PLACES=196, PETRI_TRANSITIONS=449} [2022-07-19 21:40:34,718 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 110 predicate places. [2022-07-19 21:40:34,718 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 449 transitions, 9123 flow [2022-07-19 21:40:34,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:34,719 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:34,719 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:34,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:34,943 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,SelfDestructingSolverStorable14 [2022-07-19 21:40:34,943 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash 656605838, now seen corresponding path program 7 times [2022-07-19 21:40:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873877693] [2022-07-19 21:40:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:35,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:35,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873877693] [2022-07-19 21:40:35,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873877693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:35,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:35,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:40:35,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206064705] [2022-07-19 21:40:35,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:35,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:40:35,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:35,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:40:35,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:40:35,052 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-19 21:40:35,053 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 449 transitions, 9123 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:35,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:35,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-19 21:40:35,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:36,899 INFO L129 PetriNetUnfolder]: 3464/8894 cut-off events. [2022-07-19 21:40:36,899 INFO L130 PetriNetUnfolder]: For 135480/136714 co-relation queries the response was YES. [2022-07-19 21:40:36,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55488 conditions, 8894 events. 3464/8894 cut-off events. For 135480/136714 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 89611 event pairs, 465 based on Foata normal form. 311/8947 useless extension candidates. Maximal degree in co-relation 55427. Up to 1740 conditions per place. [2022-07-19 21:40:37,025 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 150 selfloop transitions, 370 changer transitions 3/609 dead transitions. [2022-07-19 21:40:37,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 609 transitions, 13216 flow [2022-07-19 21:40:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:37,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2022-07-19 21:40:37,027 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8625429553264605 [2022-07-19 21:40:37,027 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 502 transitions. [2022-07-19 21:40:37,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 502 transitions. [2022-07-19 21:40:37,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:37,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 502 transitions. [2022-07-19 21:40:37,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:37,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:37,031 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:37,031 INFO L186 Difference]: Start difference. First operand has 196 places, 449 transitions, 9123 flow. Second operand 6 states and 502 transitions. [2022-07-19 21:40:37,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 609 transitions, 13216 flow [2022-07-19 21:40:37,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 609 transitions, 13148 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-19 21:40:37,322 INFO L242 Difference]: Finished difference. Result has 205 places, 548 transitions, 12794 flow [2022-07-19 21:40:37,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9059, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12794, PETRI_PLACES=205, PETRI_TRANSITIONS=548} [2022-07-19 21:40:37,323 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 119 predicate places. [2022-07-19 21:40:37,323 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 548 transitions, 12794 flow [2022-07-19 21:40:37,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:37,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:37,324 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:37,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:40:37,324 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:37,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1072745922, now seen corresponding path program 4 times [2022-07-19 21:40:37,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:37,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7232900] [2022-07-19 21:40:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:37,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:37,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:37,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7232900] [2022-07-19 21:40:37,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7232900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:37,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:37,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:37,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647240965] [2022-07-19 21:40:37,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:37,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:37,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:37,385 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-19 21:40:37,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 548 transitions, 12794 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:37,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:37,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-19 21:40:37,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:39,350 INFO L129 PetriNetUnfolder]: 3909/9528 cut-off events. [2022-07-19 21:40:39,350 INFO L130 PetriNetUnfolder]: For 170244/170512 co-relation queries the response was YES. [2022-07-19 21:40:39,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63320 conditions, 9528 events. 3909/9528 cut-off events. For 170244/170512 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 93113 event pairs, 976 based on Foata normal form. 37/9292 useless extension candidates. Maximal degree in co-relation 63254. Up to 5688 conditions per place. [2022-07-19 21:40:39,462 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 436 selfloop transitions, 66 changer transitions 8/584 dead transitions. [2022-07-19 21:40:39,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 584 transitions, 14251 flow [2022-07-19 21:40:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:39,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-07-19 21:40:39,464 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-07-19 21:40:39,464 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-07-19 21:40:39,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-07-19 21:40:39,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:39,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-07-19 21:40:39,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:39,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:39,467 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:39,467 INFO L186 Difference]: Start difference. First operand has 205 places, 548 transitions, 12794 flow. Second operand 6 states and 476 transitions. [2022-07-19 21:40:39,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 584 transitions, 14251 flow [2022-07-19 21:40:39,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 584 transitions, 14215 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-07-19 21:40:39,915 INFO L242 Difference]: Finished difference. Result has 212 places, 541 transitions, 12699 flow [2022-07-19 21:40:39,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12418, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12699, PETRI_PLACES=212, PETRI_TRANSITIONS=541} [2022-07-19 21:40:39,916 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 126 predicate places. [2022-07-19 21:40:39,916 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 541 transitions, 12699 flow [2022-07-19 21:40:39,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:39,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:39,916 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:39,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:40:39,916 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:39,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:39,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1416644298, now seen corresponding path program 8 times [2022-07-19 21:40:39,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:39,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889362737] [2022-07-19 21:40:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:39,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:40,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:40,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889362737] [2022-07-19 21:40:40,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889362737] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:40,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083346620] [2022-07-19 21:40:40,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:40:40,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:40,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:40,035 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) [2022-07-19 21:40:40,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:40:40,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:40:40,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:40:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 21:40:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:40,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:40:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:40,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083346620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:40:40,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:40:40,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-07-19 21:40:40,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192051664] [2022-07-19 21:40:40,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:40:40,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:40:40,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:40,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:40:40,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:40:40,962 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-19 21:40:40,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 541 transitions, 12699 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:40,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:40,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-19 21:40:40,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:45,975 INFO L129 PetriNetUnfolder]: 7811/19000 cut-off events. [2022-07-19 21:40:45,975 INFO L130 PetriNetUnfolder]: For 303313/304046 co-relation queries the response was YES. [2022-07-19 21:40:46,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118832 conditions, 19000 events. 7811/19000 cut-off events. For 303313/304046 co-relation queries the response was YES. Maximal size of possible extension queue 1439. Compared 210815 event pairs, 1006 based on Foata normal form. 473/19077 useless extension candidates. Maximal degree in co-relation 118762. Up to 4772 conditions per place. [2022-07-19 21:40:46,233 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 783 selfloop transitions, 280 changer transitions 21/1170 dead transitions. [2022-07-19 21:40:46,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1170 transitions, 28289 flow [2022-07-19 21:40:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:40:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:40:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1097 transitions. [2022-07-19 21:40:46,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7539518900343642 [2022-07-19 21:40:46,235 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1097 transitions. [2022-07-19 21:40:46,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1097 transitions. [2022-07-19 21:40:46,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:46,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1097 transitions. [2022-07-19 21:40:46,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.13333333333334) internal successors, (1097), 15 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:46,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:46,240 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:46,240 INFO L186 Difference]: Start difference. First operand has 212 places, 541 transitions, 12699 flow. Second operand 15 states and 1097 transitions. [2022-07-19 21:40:46,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1170 transitions, 28289 flow [2022-07-19 21:40:46,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1170 transitions, 28213 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-19 21:40:46,939 INFO L242 Difference]: Finished difference. Result has 236 places, 711 transitions, 17313 flow [2022-07-19 21:40:46,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12577, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=17313, PETRI_PLACES=236, PETRI_TRANSITIONS=711} [2022-07-19 21:40:46,940 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-19 21:40:46,940 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 711 transitions, 17313 flow [2022-07-19 21:40:46,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:46,940 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:46,940 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:46,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:40:47,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:40:47,141 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:47,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:47,142 INFO L85 PathProgramCache]: Analyzing trace with hash 846898254, now seen corresponding path program 9 times [2022-07-19 21:40:47,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:47,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941623014] [2022-07-19 21:40:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:47,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:47,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:47,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941623014] [2022-07-19 21:40:47,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941623014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:47,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:47,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:47,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404125586] [2022-07-19 21:40:47,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:47,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:47,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:47,221 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-19 21:40:47,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 711 transitions, 17313 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:47,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:47,222 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-19 21:40:47,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:52,048 INFO L129 PetriNetUnfolder]: 7695/18660 cut-off events. [2022-07-19 21:40:52,048 INFO L130 PetriNetUnfolder]: For 363847/364686 co-relation queries the response was YES. [2022-07-19 21:40:52,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129115 conditions, 18660 events. 7695/18660 cut-off events. For 363847/364686 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 206916 event pairs, 2046 based on Foata normal form. 194/18371 useless extension candidates. Maximal degree in co-relation 129034. Up to 11820 conditions per place. [2022-07-19 21:40:52,313 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 566 selfloop transitions, 73 changer transitions 9/740 dead transitions. [2022-07-19 21:40:52,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 740 transitions, 18968 flow [2022-07-19 21:40:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 475 transitions. [2022-07-19 21:40:52,314 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8161512027491409 [2022-07-19 21:40:52,315 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 475 transitions. [2022-07-19 21:40:52,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 475 transitions. [2022-07-19 21:40:52,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:52,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 475 transitions. [2022-07-19 21:40:52,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.16666666666667) internal successors, (475), 6 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:52,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:52,317 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:52,317 INFO L186 Difference]: Start difference. First operand has 236 places, 711 transitions, 17313 flow. Second operand 6 states and 475 transitions. [2022-07-19 21:40:52,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 740 transitions, 18968 flow [2022-07-19 21:40:53,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 740 transitions, 18783 flow, removed 58 selfloop flow, removed 4 redundant places. [2022-07-19 21:40:53,206 INFO L242 Difference]: Finished difference. Result has 237 places, 715 transitions, 17401 flow [2022-07-19 21:40:53,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=17100, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17401, PETRI_PLACES=237, PETRI_TRANSITIONS=715} [2022-07-19 21:40:53,207 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2022-07-19 21:40:53,207 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 715 transitions, 17401 flow [2022-07-19 21:40:53,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:53,207 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:53,207 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:53,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 21:40:53,207 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:53,207 INFO L85 PathProgramCache]: Analyzing trace with hash 570332790, now seen corresponding path program 10 times [2022-07-19 21:40:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:53,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030088032] [2022-07-19 21:40:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:53,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:53,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030088032] [2022-07-19 21:40:53,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030088032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:40:53,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:40:53,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:40:53,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563011149] [2022-07-19 21:40:53,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:40:53,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:40:53,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:40:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:40:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:40:53,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-19 21:40:53,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 715 transitions, 17401 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:53,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:40:53,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-19 21:40:53,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:40:57,933 INFO L129 PetriNetUnfolder]: 7839/18997 cut-off events. [2022-07-19 21:40:57,933 INFO L130 PetriNetUnfolder]: For 377260/378069 co-relation queries the response was YES. [2022-07-19 21:40:58,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132423 conditions, 18997 events. 7839/18997 cut-off events. For 377260/378069 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 211246 event pairs, 2077 based on Foata normal form. 194/18715 useless extension candidates. Maximal degree in co-relation 132341. Up to 11793 conditions per place. [2022-07-19 21:40:58,184 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 627 selfloop transitions, 87 changer transitions 15/819 dead transitions. [2022-07-19 21:40:58,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 819 transitions, 21055 flow [2022-07-19 21:40:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:40:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:40:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-19 21:40:58,185 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-19 21:40:58,185 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-19 21:40:58,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-19 21:40:58,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:40:58,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-19 21:40:58,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:58,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:58,188 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:58,188 INFO L186 Difference]: Start difference. First operand has 237 places, 715 transitions, 17401 flow. Second operand 6 states and 486 transitions. [2022-07-19 21:40:58,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 819 transitions, 21055 flow [2022-07-19 21:40:59,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 819 transitions, 20722 flow, removed 37 selfloop flow, removed 7 redundant places. [2022-07-19 21:40:59,247 INFO L242 Difference]: Finished difference. Result has 236 places, 713 transitions, 17288 flow [2022-07-19 21:40:59,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16673, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17288, PETRI_PLACES=236, PETRI_TRANSITIONS=713} [2022-07-19 21:40:59,247 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-19 21:40:59,248 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 713 transitions, 17288 flow [2022-07-19 21:40:59,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:40:59,248 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:40:59,248 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:40:59,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:40:59,248 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:40:59,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:40:59,249 INFO L85 PathProgramCache]: Analyzing trace with hash -742089420, now seen corresponding path program 1 times [2022-07-19 21:40:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:40:59,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989598447] [2022-07-19 21:40:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:40:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:59,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:40:59,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989598447] [2022-07-19 21:40:59,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989598447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:40:59,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442139995] [2022-07-19 21:40:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:40:59,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:40:59,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:40:59,416 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) [2022-07-19 21:40:59,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:40:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:40:59,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:40:59,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:40:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:40:59,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:04,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442139995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:04,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:04,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-19 21:41:04,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196104082] [2022-07-19 21:41:04,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:04,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:41:04,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:41:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=244, Unknown=1, NotChecked=0, Total=306 [2022-07-19 21:41:04,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-19 21:41:04,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 713 transitions, 17288 flow. Second operand has 18 states, 18 states have (on average 67.11111111111111) internal successors, (1208), 18 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:04,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:04,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-19 21:41:04,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:10,183 INFO L129 PetriNetUnfolder]: 7817/20820 cut-off events. [2022-07-19 21:41:10,183 INFO L130 PetriNetUnfolder]: For 399604/400727 co-relation queries the response was YES. [2022-07-19 21:41:10,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143283 conditions, 20820 events. 7817/20820 cut-off events. For 399604/400727 co-relation queries the response was YES. Maximal size of possible extension queue 1672. Compared 245470 event pairs, 539 based on Foata normal form. 373/20764 useless extension candidates. Maximal degree in co-relation 143202. Up to 8773 conditions per place. [2022-07-19 21:41:10,567 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 670 selfloop transitions, 347 changer transitions 9/1133 dead transitions. [2022-07-19 21:41:10,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 1133 transitions, 28929 flow [2022-07-19 21:41:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:41:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:41:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 855 transitions. [2022-07-19 21:41:10,569 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7345360824742269 [2022-07-19 21:41:10,569 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 855 transitions. [2022-07-19 21:41:10,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 855 transitions. [2022-07-19 21:41:10,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:10,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 855 transitions. [2022-07-19 21:41:10,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 71.25) internal successors, (855), 12 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:10,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:10,571 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:10,571 INFO L186 Difference]: Start difference. First operand has 236 places, 713 transitions, 17288 flow. Second operand 12 states and 855 transitions. [2022-07-19 21:41:10,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 1133 transitions, 28929 flow [2022-07-19 21:41:11,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1133 transitions, 28505 flow, removed 19 selfloop flow, removed 13 redundant places. [2022-07-19 21:41:11,779 INFO L242 Difference]: Finished difference. Result has 237 places, 922 transitions, 22501 flow [2022-07-19 21:41:11,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16872, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=22501, PETRI_PLACES=237, PETRI_TRANSITIONS=922} [2022-07-19 21:41:11,780 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2022-07-19 21:41:11,780 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 922 transitions, 22501 flow [2022-07-19 21:41:11,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.11111111111111) internal successors, (1208), 18 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:11,781 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:11,781 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:11,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:12,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:12,004 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1271945040, now seen corresponding path program 2 times [2022-07-19 21:41:12,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:12,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13191839] [2022-07-19 21:41:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:12,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:12,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13191839] [2022-07-19 21:41:12,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13191839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832956809] [2022-07-19 21:41:12,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:41:12,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:12,203 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) [2022-07-19 21:41:12,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:41:12,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:41:12,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:12,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:41:12,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:12,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:18,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832956809] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:18,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:18,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-07-19 21:41:18,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565122988] [2022-07-19 21:41:18,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:18,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:41:18,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:18,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:41:18,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2022-07-19 21:41:18,137 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-07-19 21:41:18,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 922 transitions, 22501 flow. Second operand has 17 states, 17 states have (on average 65.76470588235294) internal successors, (1118), 17 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:18,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:18,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-07-19 21:41:18,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:25,222 INFO L129 PetriNetUnfolder]: 9603/24643 cut-off events. [2022-07-19 21:41:25,222 INFO L130 PetriNetUnfolder]: For 497725/498201 co-relation queries the response was YES. [2022-07-19 21:41:25,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177330 conditions, 24643 events. 9603/24643 cut-off events. For 497725/498201 co-relation queries the response was YES. Maximal size of possible extension queue 1995. Compared 293341 event pairs, 1542 based on Foata normal form. 54/24147 useless extension candidates. Maximal degree in co-relation 177251. Up to 12861 conditions per place. [2022-07-19 21:41:25,546 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 624 selfloop transitions, 428 changer transitions 7/1131 dead transitions. [2022-07-19 21:41:25,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1131 transitions, 28693 flow [2022-07-19 21:41:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:41:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:41:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 836 transitions. [2022-07-19 21:41:25,547 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.718213058419244 [2022-07-19 21:41:25,547 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 836 transitions. [2022-07-19 21:41:25,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 836 transitions. [2022-07-19 21:41:25,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:25,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 836 transitions. [2022-07-19 21:41:25,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.66666666666667) internal successors, (836), 12 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:25,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:25,552 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:25,552 INFO L186 Difference]: Start difference. First operand has 237 places, 922 transitions, 22501 flow. Second operand 12 states and 836 transitions. [2022-07-19 21:41:25,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1131 transitions, 28693 flow [2022-07-19 21:41:27,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1131 transitions, 28276 flow, removed 168 selfloop flow, removed 5 redundant places. [2022-07-19 21:41:27,151 INFO L242 Difference]: Finished difference. Result has 244 places, 984 transitions, 24543 flow [2022-07-19 21:41:27,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=22086, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24543, PETRI_PLACES=244, PETRI_TRANSITIONS=984} [2022-07-19 21:41:27,152 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 158 predicate places. [2022-07-19 21:41:27,152 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 984 transitions, 24543 flow [2022-07-19 21:41:27,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.76470588235294) internal successors, (1118), 17 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:27,153 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:27,153 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:27,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 21:41:27,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 21:41:27,354 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:27,354 INFO L85 PathProgramCache]: Analyzing trace with hash 814758276, now seen corresponding path program 3 times [2022-07-19 21:41:27,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:27,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160033425] [2022-07-19 21:41:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:27,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:27,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:27,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160033425] [2022-07-19 21:41:27,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160033425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:27,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869909212] [2022-07-19 21:41:27,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:41:27,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:27,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:27,512 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) [2022-07-19 21:41:27,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:41:27,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:41:27,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:41:27,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:41:27,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:27,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:28,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869909212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:28,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:28,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-07-19 21:41:28,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082111644] [2022-07-19 21:41:28,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:28,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:41:28,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:41:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:41:28,459 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-07-19 21:41:28,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 984 transitions, 24543 flow. Second operand has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:28,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:28,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-07-19 21:41:28,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:41:36,277 INFO L129 PetriNetUnfolder]: 10926/27654 cut-off events. [2022-07-19 21:41:36,277 INFO L130 PetriNetUnfolder]: For 601946/602484 co-relation queries the response was YES. [2022-07-19 21:41:36,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207257 conditions, 27654 events. 10926/27654 cut-off events. For 601946/602484 co-relation queries the response was YES. Maximal size of possible extension queue 2324. Compared 332117 event pairs, 1738 based on Foata normal form. 61/27113 useless extension candidates. Maximal degree in co-relation 207176. Up to 15756 conditions per place. [2022-07-19 21:41:36,912 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 833 selfloop transitions, 409 changer transitions 4/1318 dead transitions. [2022-07-19 21:41:36,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1318 transitions, 35350 flow [2022-07-19 21:41:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:41:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:41:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 829 transitions. [2022-07-19 21:41:36,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7121993127147767 [2022-07-19 21:41:36,913 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 829 transitions. [2022-07-19 21:41:36,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 829 transitions. [2022-07-19 21:41:36,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:41:36,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 829 transitions. [2022-07-19 21:41:36,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.08333333333333) internal successors, (829), 12 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:36,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:36,915 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:36,916 INFO L186 Difference]: Start difference. First operand has 244 places, 984 transitions, 24543 flow. Second operand 12 states and 829 transitions. [2022-07-19 21:41:36,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1318 transitions, 35350 flow [2022-07-19 21:41:39,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1318 transitions, 34064 flow, removed 71 selfloop flow, removed 16 redundant places. [2022-07-19 21:41:39,261 INFO L242 Difference]: Finished difference. Result has 239 places, 1152 transitions, 29366 flow [2022-07-19 21:41:39,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=23471, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=29366, PETRI_PLACES=239, PETRI_TRANSITIONS=1152} [2022-07-19 21:41:39,262 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 153 predicate places. [2022-07-19 21:41:39,263 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 1152 transitions, 29366 flow [2022-07-19 21:41:39,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:39,263 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:41:39,263 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:41:39,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:41:39,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:39,464 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:41:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:41:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash -430491294, now seen corresponding path program 1 times [2022-07-19 21:41:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:41:39,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650572592] [2022-07-19 21:41:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:41:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:39,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:41:39,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650572592] [2022-07-19 21:41:39,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650572592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:41:39,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442171627] [2022-07-19 21:41:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:41:39,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:41:39,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:41:39,553 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) [2022-07-19 21:41:39,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:41:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:41:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:41:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:41:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:39,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:41:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:41:40,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442171627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:41:40,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:41:40,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11] total 16 [2022-07-19 21:41:40,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949178756] [2022-07-19 21:41:40,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:41:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:41:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:41:40,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:41:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:41:40,175 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-19 21:41:40,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 1152 transitions, 29366 flow. Second operand has 16 states, 16 states have (on average 71.25) internal successors, (1140), 16 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:41:40,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:41:40,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-19 21:41:40,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand