./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/security.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/security.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 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:49:52,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:49:52,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:49:52,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:49:52,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:49:52,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:49:52,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:49:52,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:49:52,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:49:52,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:49:52,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:49:52,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:49:52,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:49:52,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:49:52,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:49:52,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:49:52,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:49:52,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:49:52,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:49:52,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:49:52,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:49:52,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:49:52,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:49:52,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:49:52,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:49:52,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:49:52,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:49:52,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:49:52,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:49:52,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:49:52,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:49:52,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:49:52,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:49:52,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:49:52,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:49:52,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:49:52,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:49:52,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:49:52,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:49:52,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:49:52,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:49:52,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:49:52,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:49:52,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:49:52,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:49:52,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:49:52,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:49:52,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:49:52,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:49:52,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:49:52,824 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:49:52,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:49:52,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:49:52,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:49:52,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:49:52,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:49:52,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:49:52,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:49:52,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:49:52,826 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:49:52,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:49:52,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:49:52,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:49:52,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:49:52,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:49:52,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:49:52,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:49:52,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:49:52,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:49:52,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:49:52,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:49:52,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:49:52,828 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:49:52,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:49:52,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:49:52,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:49:52,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 [2021-12-22 13:49:53,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:49:53,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:49:53,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:49:53,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:49:53,064 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:49:53,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/security.wvr.c [2021-12-22 13:49:53,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3077e13df/91a67b89e8b744bcba7bd1c9f894b063/FLAG46e0a3cb4 [2021-12-22 13:49:53,474 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:49:53,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/security.wvr.c [2021-12-22 13:49:53,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3077e13df/91a67b89e8b744bcba7bd1c9f894b063/FLAG46e0a3cb4 [2021-12-22 13:49:53,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3077e13df/91a67b89e8b744bcba7bd1c9f894b063 [2021-12-22 13:49:53,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:49:53,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:49:53,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:49:53,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:49:53,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:49:53,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e1ec085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53, skipping insertion in model container [2021-12-22 13:49:53,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:49:53,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:49:53,604 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/security.wvr.c[1931,1944] [2021-12-22 13:49:53,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:49:53,611 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:49:53,629 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/security.wvr.c[1931,1944] [2021-12-22 13:49:53,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:49:53,642 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:49:53,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53 WrapperNode [2021-12-22 13:49:53,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:49:53,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:49:53,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:49:53,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:49:53,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,666 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-12-22 13:49:53,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:49:53,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:49:53,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:49:53,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:49:53,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:49:53,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:49:53,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:49:53,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:49:53,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (1/1) ... [2021-12-22 13:49:53,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:49:53,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:53,733 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) [2021-12-22 13:49:53,758 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 [2021-12-22 13:49:53,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:49:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:49:53,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:49:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:49:53,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:49:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:49:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:49:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:49:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:49:53,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:49:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:49:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:49:53,778 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:49:53,851 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:49:53,852 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:49:54,004 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:49:54,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:49:54,010 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 13:49:54,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:49:54 BoogieIcfgContainer [2021-12-22 13:49:54,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:49:54,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:49:54,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:49:54,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:49:54,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:49:53" (1/3) ... [2021-12-22 13:49:54,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e10b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:49:54, skipping insertion in model container [2021-12-22 13:49:54,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:53" (2/3) ... [2021-12-22 13:49:54,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e10b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:49:54, skipping insertion in model container [2021-12-22 13:49:54,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:49:54" (3/3) ... [2021-12-22 13:49:54,016 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2021-12-22 13:49:54,019 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:49:54,019 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:49:54,019 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:49:54,020 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:49:54,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,043 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,043 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,043 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,043 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,043 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,044 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,044 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,044 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,047 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,049 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,049 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,049 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,051 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,051 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,051 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:54,054 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:49:54,091 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:49:54,105 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:49:54,105 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:49:54,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 178 flow [2021-12-22 13:49:54,175 INFO L129 PetriNetUnfolder]: 3/79 cut-off events. [2021-12-22 13:49:54,176 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:49:54,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 3/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-12-22 13:49:54,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 81 transitions, 178 flow [2021-12-22 13:49:54,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 70 transitions, 152 flow [2021-12-22 13:49:54,205 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2021-12-22 13:49:54,205 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:49:54,206 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:54,206 INFO L254 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] [2021-12-22 13:49:54,207 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:54,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1803071327, now seen corresponding path program 1 times [2021-12-22 13:49:54,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:54,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588230794] [2021-12-22 13:49:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:54,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:54,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:54,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588230794] [2021-12-22 13:49:54,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588230794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:54,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:54,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:54,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516622086] [2021-12-22 13:49:54,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:54,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:54,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:54,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:54,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:54,640 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:54,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 152 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:54,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:54,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:54,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:54,975 INFO L129 PetriNetUnfolder]: 32/219 cut-off events. [2021-12-22 13:49:54,976 INFO L130 PetriNetUnfolder]: For 57/60 co-relation queries the response was YES. [2021-12-22 13:49:54,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 219 events. 32/219 cut-off events. For 57/60 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 894 event pairs, 11 based on Foata normal form. 5/212 useless extension candidates. Maximal degree in co-relation 170. Up to 47 conditions per place. [2021-12-22 13:49:54,979 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 34 selfloop transitions, 2 changer transitions 24/106 dead transitions. [2021-12-22 13:49:54,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 377 flow [2021-12-22 13:49:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:49:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-22 13:49:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 906 transitions. [2021-12-22 13:49:54,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.745679012345679 [2021-12-22 13:49:54,997 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 906 transitions. [2021-12-22 13:49:54,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 906 transitions. [2021-12-22 13:49:55,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:55,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 906 transitions. [2021-12-22 13:49:55,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.4) internal successors, (906), 15 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,016 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,018 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 152 flow. Second operand 15 states and 906 transitions. [2021-12-22 13:49:55,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 377 flow [2021-12-22 13:49:55,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 347 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:49:55,024 INFO L242 Difference]: Finished difference. Result has 95 places, 69 transitions, 175 flow [2021-12-22 13:49:55,026 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=175, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2021-12-22 13:49:55,028 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2021-12-22 13:49:55,028 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 175 flow [2021-12-22 13:49:55,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,032 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:55,032 INFO L254 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] [2021-12-22 13:49:55,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:49:55,032 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1262948190, now seen corresponding path program 1 times [2021-12-22 13:49:55,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:55,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943396659] [2021-12-22 13:49:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:55,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:55,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:55,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943396659] [2021-12-22 13:49:55,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943396659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:55,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:55,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:49:55,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145944161] [2021-12-22 13:49:55,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:55,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:49:55,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:49:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:49:55,239 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2021-12-22 13:49:55,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 175 flow. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:55,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2021-12-22 13:49:55,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:55,375 INFO L129 PetriNetUnfolder]: 21/184 cut-off events. [2021-12-22 13:49:55,375 INFO L130 PetriNetUnfolder]: For 99/103 co-relation queries the response was YES. [2021-12-22 13:49:55,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 184 events. 21/184 cut-off events. For 99/103 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 647 event pairs, 8 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 336. Up to 39 conditions per place. [2021-12-22 13:49:55,377 INFO L132 encePairwiseOnDemand]: 74/81 looper letters, 37 selfloop transitions, 3 changer transitions 6/94 dead transitions. [2021-12-22 13:49:55,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 379 flow [2021-12-22 13:49:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:49:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:49:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 511 transitions. [2021-12-22 13:49:55,378 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7885802469135802 [2021-12-22 13:49:55,378 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 511 transitions. [2021-12-22 13:49:55,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 511 transitions. [2021-12-22 13:49:55,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:55,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 511 transitions. [2021-12-22 13:49:55,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.875) internal successors, (511), 8 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,381 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,381 INFO L186 Difference]: Start difference. First operand has 95 places, 69 transitions, 175 flow. Second operand 8 states and 511 transitions. [2021-12-22 13:49:55,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 379 flow [2021-12-22 13:49:55,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 314 flow, removed 32 selfloop flow, removed 10 redundant places. [2021-12-22 13:49:55,384 INFO L242 Difference]: Finished difference. Result has 86 places, 71 transitions, 183 flow [2021-12-22 13:49:55,385 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=71} [2021-12-22 13:49:55,385 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2021-12-22 13:49:55,385 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 71 transitions, 183 flow [2021-12-22 13:49:55,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:55,386 INFO L254 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] [2021-12-22 13:49:55,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:49:55,386 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1033469356, now seen corresponding path program 2 times [2021-12-22 13:49:55,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:55,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477771651] [2021-12-22 13:49:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:55,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:55,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:55,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477771651] [2021-12-22 13:49:55,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477771651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:55,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:55,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:49:55,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618554570] [2021-12-22 13:49:55,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:55,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:49:55,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:49:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:49:55,530 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2021-12-22 13:49:55,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 71 transitions, 183 flow. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:55,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2021-12-22 13:49:55,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:55,660 INFO L129 PetriNetUnfolder]: 25/241 cut-off events. [2021-12-22 13:49:55,661 INFO L130 PetriNetUnfolder]: For 111/115 co-relation queries the response was YES. [2021-12-22 13:49:55,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 241 events. 25/241 cut-off events. For 111/115 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1129 event pairs, 16 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 427. Up to 61 conditions per place. [2021-12-22 13:49:55,663 INFO L132 encePairwiseOnDemand]: 74/81 looper letters, 34 selfloop transitions, 4 changer transitions 7/93 dead transitions. [2021-12-22 13:49:55,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 366 flow [2021-12-22 13:49:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:49:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:49:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 505 transitions. [2021-12-22 13:49:55,665 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779320987654321 [2021-12-22 13:49:55,665 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 505 transitions. [2021-12-22 13:49:55,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 505 transitions. [2021-12-22 13:49:55,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:55,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 505 transitions. [2021-12-22 13:49:55,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,668 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,668 INFO L186 Difference]: Start difference. First operand has 86 places, 71 transitions, 183 flow. Second operand 8 states and 505 transitions. [2021-12-22 13:49:55,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 366 flow [2021-12-22 13:49:55,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 93 transitions, 347 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-12-22 13:49:55,672 INFO L242 Difference]: Finished difference. Result has 92 places, 72 transitions, 206 flow [2021-12-22 13:49:55,672 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2021-12-22 13:49:55,674 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2021-12-22 13:49:55,674 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 206 flow [2021-12-22 13:49:55,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,674 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:55,674 INFO L254 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] [2021-12-22 13:49:55,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:49:55,675 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:55,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1244957747, now seen corresponding path program 2 times [2021-12-22 13:49:55,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:55,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738022436] [2021-12-22 13:49:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:55,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:55,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738022436] [2021-12-22 13:49:55,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738022436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:55,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:55,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:55,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97158381] [2021-12-22 13:49:55,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:55,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:55,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:55,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:55,833 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:55,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 206 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:55,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:55,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:55,970 INFO L129 PetriNetUnfolder]: 28/290 cut-off events. [2021-12-22 13:49:55,971 INFO L130 PetriNetUnfolder]: For 250/251 co-relation queries the response was YES. [2021-12-22 13:49:55,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 290 events. 28/290 cut-off events. For 250/251 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1530 event pairs, 5 based on Foata normal form. 2/280 useless extension candidates. Maximal degree in co-relation 563. Up to 65 conditions per place. [2021-12-22 13:49:55,973 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 38 selfloop transitions, 6 changer transitions 8/98 dead transitions. [2021-12-22 13:49:55,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 98 transitions, 438 flow [2021-12-22 13:49:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 549 transitions. [2021-12-22 13:49:55,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2021-12-22 13:49:55,975 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 549 transitions. [2021-12-22 13:49:55,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 549 transitions. [2021-12-22 13:49:55,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:55,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 549 transitions. [2021-12-22 13:49:55,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,977 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,977 INFO L186 Difference]: Start difference. First operand has 92 places, 72 transitions, 206 flow. Second operand 9 states and 549 transitions. [2021-12-22 13:49:55,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 98 transitions, 438 flow [2021-12-22 13:49:55,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 98 transitions, 406 flow, removed 15 selfloop flow, removed 5 redundant places. [2021-12-22 13:49:55,981 INFO L242 Difference]: Finished difference. Result has 97 places, 74 transitions, 243 flow [2021-12-22 13:49:55,981 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=243, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2021-12-22 13:49:55,981 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2021-12-22 13:49:55,981 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 243 flow [2021-12-22 13:49:55,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:55,982 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:55,982 INFO L254 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] [2021-12-22 13:49:55,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:49:55,982 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:55,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:55,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1661894565, now seen corresponding path program 3 times [2021-12-22 13:49:55,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:55,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435786238] [2021-12-22 13:49:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:55,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:56,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:56,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435786238] [2021-12-22 13:49:56,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435786238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:56,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:56,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:56,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009929017] [2021-12-22 13:49:56,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:56,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:56,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:56,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:56,118 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:56,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 243 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:56,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:56,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:56,256 INFO L129 PetriNetUnfolder]: 30/343 cut-off events. [2021-12-22 13:49:56,257 INFO L130 PetriNetUnfolder]: For 415/416 co-relation queries the response was YES. [2021-12-22 13:49:56,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 343 events. 30/343 cut-off events. For 415/416 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2027 event pairs, 23 based on Foata normal form. 2/332 useless extension candidates. Maximal degree in co-relation 704. Up to 62 conditions per place. [2021-12-22 13:49:56,258 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 47 selfloop transitions, 4 changer transitions 9/106 dead transitions. [2021-12-22 13:49:56,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 106 transitions, 523 flow [2021-12-22 13:49:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 558 transitions. [2021-12-22 13:49:56,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7654320987654321 [2021-12-22 13:49:56,260 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 558 transitions. [2021-12-22 13:49:56,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 558 transitions. [2021-12-22 13:49:56,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:56,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 558 transitions. [2021-12-22 13:49:56,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.0) internal successors, (558), 9 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,263 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,263 INFO L186 Difference]: Start difference. First operand has 97 places, 74 transitions, 243 flow. Second operand 9 states and 558 transitions. [2021-12-22 13:49:56,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 106 transitions, 523 flow [2021-12-22 13:49:56,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 106 transitions, 488 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-12-22 13:49:56,267 INFO L242 Difference]: Finished difference. Result has 104 places, 76 transitions, 272 flow [2021-12-22 13:49:56,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=272, PETRI_PLACES=104, PETRI_TRANSITIONS=76} [2021-12-22 13:49:56,267 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2021-12-22 13:49:56,268 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 76 transitions, 272 flow [2021-12-22 13:49:56,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:56,268 INFO L254 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] [2021-12-22 13:49:56,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:49:56,269 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:56,269 INFO L85 PathProgramCache]: Analyzing trace with hash 407443089, now seen corresponding path program 4 times [2021-12-22 13:49:56,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:56,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970951153] [2021-12-22 13:49:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:56,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:56,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970951153] [2021-12-22 13:49:56,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970951153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:56,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:56,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:56,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246472742] [2021-12-22 13:49:56,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:56,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:56,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:56,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:56,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:56,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 76 transitions, 272 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:56,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:56,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:56,510 INFO L129 PetriNetUnfolder]: 27/352 cut-off events. [2021-12-22 13:49:56,510 INFO L130 PetriNetUnfolder]: For 511/513 co-relation queries the response was YES. [2021-12-22 13:49:56,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 352 events. 27/352 cut-off events. For 511/513 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2126 event pairs, 7 based on Foata normal form. 2/343 useless extension candidates. Maximal degree in co-relation 754. Up to 73 conditions per place. [2021-12-22 13:49:56,512 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 51 selfloop transitions, 6 changer transitions 10/113 dead transitions. [2021-12-22 13:49:56,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 113 transitions, 600 flow [2021-12-22 13:49:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 561 transitions. [2021-12-22 13:49:56,514 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7695473251028807 [2021-12-22 13:49:56,514 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 561 transitions. [2021-12-22 13:49:56,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 561 transitions. [2021-12-22 13:49:56,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:56,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 561 transitions. [2021-12-22 13:49:56,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.333333333333336) internal successors, (561), 9 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,516 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,516 INFO L186 Difference]: Start difference. First operand has 104 places, 76 transitions, 272 flow. Second operand 9 states and 561 transitions. [2021-12-22 13:49:56,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 113 transitions, 600 flow [2021-12-22 13:49:56,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 113 transitions, 559 flow, removed 19 selfloop flow, removed 5 redundant places. [2021-12-22 13:49:56,520 INFO L242 Difference]: Finished difference. Result has 110 places, 79 transitions, 330 flow [2021-12-22 13:49:56,520 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=110, PETRI_TRANSITIONS=79} [2021-12-22 13:49:56,520 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2021-12-22 13:49:56,520 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 79 transitions, 330 flow [2021-12-22 13:49:56,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,521 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:56,521 INFO L254 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] [2021-12-22 13:49:56,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:49:56,521 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash 741952778, now seen corresponding path program 3 times [2021-12-22 13:49:56,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:56,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045667500] [2021-12-22 13:49:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:56,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:56,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:56,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045667500] [2021-12-22 13:49:56,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045667500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:56,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:56,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:49:56,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090774828] [2021-12-22 13:49:56,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:56,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:49:56,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:49:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:49:56,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2021-12-22 13:49:56,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 79 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:56,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2021-12-22 13:49:56,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:56,731 INFO L129 PetriNetUnfolder]: 22/306 cut-off events. [2021-12-22 13:49:56,732 INFO L130 PetriNetUnfolder]: For 582/589 co-relation queries the response was YES. [2021-12-22 13:49:56,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 306 events. 22/306 cut-off events. For 582/589 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1676 event pairs, 19 based on Foata normal form. 1/298 useless extension candidates. Maximal degree in co-relation 675. Up to 70 conditions per place. [2021-12-22 13:49:56,733 INFO L132 encePairwiseOnDemand]: 74/81 looper letters, 35 selfloop transitions, 3 changer transitions 10/97 dead transitions. [2021-12-22 13:49:56,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 97 transitions, 518 flow [2021-12-22 13:49:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:49:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:49:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 505 transitions. [2021-12-22 13:49:56,735 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779320987654321 [2021-12-22 13:49:56,735 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 505 transitions. [2021-12-22 13:49:56,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 505 transitions. [2021-12-22 13:49:56,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:56,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 505 transitions. [2021-12-22 13:49:56,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,738 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,738 INFO L186 Difference]: Start difference. First operand has 110 places, 79 transitions, 330 flow. Second operand 8 states and 505 transitions. [2021-12-22 13:49:56,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 97 transitions, 518 flow [2021-12-22 13:49:56,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 97 transitions, 488 flow, removed 14 selfloop flow, removed 4 redundant places. [2021-12-22 13:49:56,742 INFO L242 Difference]: Finished difference. Result has 114 places, 77 transitions, 302 flow [2021-12-22 13:49:56,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=302, PETRI_PLACES=114, PETRI_TRANSITIONS=77} [2021-12-22 13:49:56,743 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2021-12-22 13:49:56,743 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 77 transitions, 302 flow [2021-12-22 13:49:56,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:56,743 INFO L254 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] [2021-12-22 13:49:56,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:49:56,744 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:56,744 INFO L85 PathProgramCache]: Analyzing trace with hash -848346999, now seen corresponding path program 5 times [2021-12-22 13:49:56,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:56,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767659774] [2021-12-22 13:49:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:56,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:56,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:56,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767659774] [2021-12-22 13:49:56,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767659774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:56,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:56,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:56,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511250265] [2021-12-22 13:49:56,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:56,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:56,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:56,862 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:56,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 77 transitions, 302 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:56,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:56,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:56,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:56,994 INFO L129 PetriNetUnfolder]: 23/301 cut-off events. [2021-12-22 13:49:56,994 INFO L130 PetriNetUnfolder]: For 481/482 co-relation queries the response was YES. [2021-12-22 13:49:56,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 301 events. 23/301 cut-off events. For 481/482 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1659 event pairs, 19 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 657. Up to 62 conditions per place. [2021-12-22 13:49:56,996 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 42 selfloop transitions, 6 changer transitions 8/102 dead transitions. [2021-12-22 13:49:56,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 102 transitions, 532 flow [2021-12-22 13:49:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 555 transitions. [2021-12-22 13:49:56,997 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7613168724279835 [2021-12-22 13:49:56,997 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 555 transitions. [2021-12-22 13:49:56,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 555 transitions. [2021-12-22 13:49:56,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:56,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 555 transitions. [2021-12-22 13:49:56,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.666666666666664) internal successors, (555), 9 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,000 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,000 INFO L186 Difference]: Start difference. First operand has 114 places, 77 transitions, 302 flow. Second operand 9 states and 555 transitions. [2021-12-22 13:49:57,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 102 transitions, 532 flow [2021-12-22 13:49:57,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 493 flow, removed 18 selfloop flow, removed 7 redundant places. [2021-12-22 13:49:57,003 INFO L242 Difference]: Finished difference. Result has 113 places, 78 transitions, 318 flow [2021-12-22 13:49:57,003 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=318, PETRI_PLACES=113, PETRI_TRANSITIONS=78} [2021-12-22 13:49:57,004 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2021-12-22 13:49:57,004 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 78 transitions, 318 flow [2021-12-22 13:49:57,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,004 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:57,005 INFO L254 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] [2021-12-22 13:49:57,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:49:57,005 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:57,005 INFO L85 PathProgramCache]: Analyzing trace with hash -252513187, now seen corresponding path program 6 times [2021-12-22 13:49:57,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:57,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689583316] [2021-12-22 13:49:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:57,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:57,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:57,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689583316] [2021-12-22 13:49:57,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689583316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:57,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:57,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:57,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105474206] [2021-12-22 13:49:57,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:57,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:57,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:57,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:57,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:57,121 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:57,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 78 transitions, 318 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:57,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:57,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:57,238 INFO L129 PetriNetUnfolder]: 22/282 cut-off events. [2021-12-22 13:49:57,239 INFO L130 PetriNetUnfolder]: For 489/491 co-relation queries the response was YES. [2021-12-22 13:49:57,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 282 events. 22/282 cut-off events. For 489/491 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1501 event pairs, 20 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 630. Up to 62 conditions per place. [2021-12-22 13:49:57,240 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 34 selfloop transitions, 2 changer transitions 13/95 dead transitions. [2021-12-22 13:49:57,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 95 transitions, 499 flow [2021-12-22 13:49:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-12-22 13:49:57,241 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2021-12-22 13:49:57,241 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-12-22 13:49:57,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-12-22 13:49:57,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:57,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-12-22 13:49:57,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,244 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,244 INFO L186 Difference]: Start difference. First operand has 113 places, 78 transitions, 318 flow. Second operand 9 states and 548 transitions. [2021-12-22 13:49:57,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 95 transitions, 499 flow [2021-12-22 13:49:57,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 95 transitions, 465 flow, removed 11 selfloop flow, removed 7 redundant places. [2021-12-22 13:49:57,247 INFO L242 Difference]: Finished difference. Result has 115 places, 74 transitions, 264 flow [2021-12-22 13:49:57,248 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=264, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2021-12-22 13:49:57,248 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2021-12-22 13:49:57,249 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 264 flow [2021-12-22 13:49:57,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,249 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:57,249 INFO L254 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] [2021-12-22 13:49:57,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:49:57,249 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1111681351, now seen corresponding path program 7 times [2021-12-22 13:49:57,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:57,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14293749] [2021-12-22 13:49:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:57,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:57,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:57,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14293749] [2021-12-22 13:49:57,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14293749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:57,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:57,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:57,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529799410] [2021-12-22 13:49:57,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:57,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:57,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:57,342 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:57,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 74 transitions, 264 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:57,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:57,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:57,455 INFO L129 PetriNetUnfolder]: 20/236 cut-off events. [2021-12-22 13:49:57,455 INFO L130 PetriNetUnfolder]: For 368/368 co-relation queries the response was YES. [2021-12-22 13:49:57,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 236 events. 20/236 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1112 event pairs, 2 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 519. Up to 45 conditions per place. [2021-12-22 13:49:57,457 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 33 selfloop transitions, 5 changer transitions 9/93 dead transitions. [2021-12-22 13:49:57,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 93 transitions, 446 flow [2021-12-22 13:49:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 547 transitions. [2021-12-22 13:49:57,458 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7503429355281207 [2021-12-22 13:49:57,458 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 547 transitions. [2021-12-22 13:49:57,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 547 transitions. [2021-12-22 13:49:57,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:57,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 547 transitions. [2021-12-22 13:49:57,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.77777777777778) internal successors, (547), 9 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,461 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,461 INFO L186 Difference]: Start difference. First operand has 115 places, 74 transitions, 264 flow. Second operand 9 states and 547 transitions. [2021-12-22 13:49:57,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 93 transitions, 446 flow [2021-12-22 13:49:57,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 403 flow, removed 18 selfloop flow, removed 10 redundant places. [2021-12-22 13:49:57,463 INFO L242 Difference]: Finished difference. Result has 108 places, 73 transitions, 251 flow [2021-12-22 13:49:57,464 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=251, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2021-12-22 13:49:57,464 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 34 predicate places. [2021-12-22 13:49:57,464 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 251 flow [2021-12-22 13:49:57,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,464 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:57,465 INFO L254 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] [2021-12-22 13:49:57,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:49:57,465 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:57,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:57,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1364185607, now seen corresponding path program 8 times [2021-12-22 13:49:57,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:57,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016114426] [2021-12-22 13:49:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:57,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:57,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:57,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016114426] [2021-12-22 13:49:57,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016114426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:57,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:57,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:57,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275874463] [2021-12-22 13:49:57,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:57,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:57,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:57,552 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:57,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 251 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:57,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:57,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:57,669 INFO L129 PetriNetUnfolder]: 18/211 cut-off events. [2021-12-22 13:49:57,670 INFO L130 PetriNetUnfolder]: For 274/274 co-relation queries the response was YES. [2021-12-22 13:49:57,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 211 events. 18/211 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 870 event pairs, 2 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 455. Up to 45 conditions per place. [2021-12-22 13:49:57,671 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 33 selfloop transitions, 2 changer transitions 11/92 dead transitions. [2021-12-22 13:49:57,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 92 transitions, 432 flow [2021-12-22 13:49:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-12-22 13:49:57,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2021-12-22 13:49:57,673 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-12-22 13:49:57,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-12-22 13:49:57,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:57,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-12-22 13:49:57,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,675 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,675 INFO L186 Difference]: Start difference. First operand has 108 places, 73 transitions, 251 flow. Second operand 9 states and 548 transitions. [2021-12-22 13:49:57,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 92 transitions, 432 flow [2021-12-22 13:49:57,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 381 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-22 13:49:57,678 INFO L242 Difference]: Finished difference. Result has 104 places, 70 transitions, 201 flow [2021-12-22 13:49:57,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=201, PETRI_PLACES=104, PETRI_TRANSITIONS=70} [2021-12-22 13:49:57,678 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2021-12-22 13:49:57,678 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 70 transitions, 201 flow [2021-12-22 13:49:57,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,679 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:57,679 INFO L254 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] [2021-12-22 13:49:57,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:49:57,679 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:57,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1784837601, now seen corresponding path program 9 times [2021-12-22 13:49:57,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:57,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431183918] [2021-12-22 13:49:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:57,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:57,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431183918] [2021-12-22 13:49:57,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431183918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:57,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:57,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:57,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333083153] [2021-12-22 13:49:57,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:57,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:57,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:57,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:57,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:57,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:57,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 70 transitions, 201 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:57,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:57,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:57,892 INFO L129 PetriNetUnfolder]: 17/200 cut-off events. [2021-12-22 13:49:57,892 INFO L130 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2021-12-22 13:49:57,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 200 events. 17/200 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 789 event pairs, 2 based on Foata normal form. 1/195 useless extension candidates. Maximal degree in co-relation 405. Up to 40 conditions per place. [2021-12-22 13:49:57,893 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 28 selfloop transitions, 5 changer transitions 8/87 dead transitions. [2021-12-22 13:49:57,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 87 transitions, 360 flow [2021-12-22 13:49:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 543 transitions. [2021-12-22 13:49:57,896 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7448559670781894 [2021-12-22 13:49:57,896 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 543 transitions. [2021-12-22 13:49:57,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 543 transitions. [2021-12-22 13:49:57,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:57,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 543 transitions. [2021-12-22 13:49:57,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.333333333333336) internal successors, (543), 9 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,898 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,898 INFO L186 Difference]: Start difference. First operand has 104 places, 70 transitions, 201 flow. Second operand 9 states and 543 transitions. [2021-12-22 13:49:57,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 87 transitions, 360 flow [2021-12-22 13:49:57,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 327 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-12-22 13:49:57,900 INFO L242 Difference]: Finished difference. Result has 99 places, 70 transitions, 199 flow [2021-12-22 13:49:57,901 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=99, PETRI_TRANSITIONS=70} [2021-12-22 13:49:57,901 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2021-12-22 13:49:57,901 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 70 transitions, 199 flow [2021-12-22 13:49:57,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,902 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:57,902 INFO L254 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] [2021-12-22 13:49:57,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:49:57,902 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:57,902 INFO L85 PathProgramCache]: Analyzing trace with hash -322699621, now seen corresponding path program 10 times [2021-12-22 13:49:57,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:57,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886228937] [2021-12-22 13:49:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:57,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:57,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886228937] [2021-12-22 13:49:57,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886228937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:57,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:57,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:57,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084448700] [2021-12-22 13:49:57,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:57,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:57,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:57,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:57,981 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:57,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 70 transitions, 199 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:57,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:57,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:57,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:58,103 INFO L129 PetriNetUnfolder]: 17/183 cut-off events. [2021-12-22 13:49:58,104 INFO L130 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2021-12-22 13:49:58,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 183 events. 17/183 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 679 event pairs, 2 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 372. Up to 38 conditions per place. [2021-12-22 13:49:58,105 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 25 selfloop transitions, 3 changer transitions 13/85 dead transitions. [2021-12-22 13:49:58,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 85 transitions, 344 flow [2021-12-22 13:49:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 542 transitions. [2021-12-22 13:49:58,106 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7434842249657064 [2021-12-22 13:49:58,106 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 542 transitions. [2021-12-22 13:49:58,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 542 transitions. [2021-12-22 13:49:58,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:58,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 542 transitions. [2021-12-22 13:49:58,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.22222222222222) internal successors, (542), 9 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,108 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,108 INFO L186 Difference]: Start difference. First operand has 99 places, 70 transitions, 199 flow. Second operand 9 states and 542 transitions. [2021-12-22 13:49:58,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 85 transitions, 344 flow [2021-12-22 13:49:58,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 85 transitions, 316 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-22 13:49:58,110 INFO L242 Difference]: Finished difference. Result has 99 places, 66 transitions, 171 flow [2021-12-22 13:49:58,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=171, PETRI_PLACES=99, PETRI_TRANSITIONS=66} [2021-12-22 13:49:58,110 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2021-12-22 13:49:58,111 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 66 transitions, 171 flow [2021-12-22 13:49:58,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:58,111 INFO L254 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] [2021-12-22 13:49:58,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:49:58,111 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1253106300, now seen corresponding path program 1 times [2021-12-22 13:49:58,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:58,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168961934] [2021-12-22 13:49:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:58,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:58,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:58,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168961934] [2021-12-22 13:49:58,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168961934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:58,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:58,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:49:58,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528210629] [2021-12-22 13:49:58,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:58,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:49:58,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:58,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:49:58,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:49:58,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:49:58,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 66 transitions, 171 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:58,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:58,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:49:58,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:58,422 INFO L129 PetriNetUnfolder]: 26/209 cut-off events. [2021-12-22 13:49:58,422 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2021-12-22 13:49:58,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 209 events. 26/209 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 812 event pairs, 0 based on Foata normal form. 3/209 useless extension candidates. Maximal degree in co-relation 440. Up to 30 conditions per place. [2021-12-22 13:49:58,423 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 36 selfloop transitions, 3 changer transitions 21/102 dead transitions. [2021-12-22 13:49:58,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 102 transitions, 496 flow [2021-12-22 13:49:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:49:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:49:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 813 transitions. [2021-12-22 13:49:58,424 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.716931216931217 [2021-12-22 13:49:58,424 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 813 transitions. [2021-12-22 13:49:58,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 813 transitions. [2021-12-22 13:49:58,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:58,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 813 transitions. [2021-12-22 13:49:58,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,427 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,427 INFO L186 Difference]: Start difference. First operand has 99 places, 66 transitions, 171 flow. Second operand 14 states and 813 transitions. [2021-12-22 13:49:58,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 102 transitions, 496 flow [2021-12-22 13:49:58,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 102 transitions, 407 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-12-22 13:49:58,429 INFO L242 Difference]: Finished difference. Result has 96 places, 66 transitions, 182 flow [2021-12-22 13:49:58,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=182, PETRI_PLACES=96, PETRI_TRANSITIONS=66} [2021-12-22 13:49:58,430 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2021-12-22 13:49:58,430 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 66 transitions, 182 flow [2021-12-22 13:49:58,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:58,430 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:58,430 INFO L254 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] [2021-12-22 13:49:58,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:49:58,431 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash 706603769, now seen corresponding path program 1 times [2021-12-22 13:49:58,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:58,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911527134] [2021-12-22 13:49:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:58,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:58,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:58,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911527134] [2021-12-22 13:49:58,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911527134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:58,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:58,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:58,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075331722] [2021-12-22 13:49:58,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:58,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:58,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:58,529 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:58,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 66 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:58,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:58,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:58,657 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2021-12-22 13:49:58,657 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2021-12-22 13:49:58,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 196 events. 18/196 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 745 event pairs, 8 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 407. Up to 50 conditions per place. [2021-12-22 13:49:58,658 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 35 selfloop transitions, 3 changer transitions 7/89 dead transitions. [2021-12-22 13:49:58,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 89 transitions, 390 flow [2021-12-22 13:49:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:49:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:49:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-12-22 13:49:58,659 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2021-12-22 13:49:58,659 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-12-22 13:49:58,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-12-22 13:49:58,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:58,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-12-22 13:49:58,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,661 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,661 INFO L186 Difference]: Start difference. First operand has 96 places, 66 transitions, 182 flow. Second operand 9 states and 548 transitions. [2021-12-22 13:49:58,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 89 transitions, 390 flow [2021-12-22 13:49:58,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 89 transitions, 322 flow, removed 28 selfloop flow, removed 12 redundant places. [2021-12-22 13:49:58,663 INFO L242 Difference]: Finished difference. Result has 90 places, 68 transitions, 194 flow [2021-12-22 13:49:58,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=194, PETRI_PLACES=90, PETRI_TRANSITIONS=68} [2021-12-22 13:49:58,663 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2021-12-22 13:49:58,664 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 68 transitions, 194 flow [2021-12-22 13:49:58,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:58,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:58,664 INFO L254 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] [2021-12-22 13:49:58,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:49:58,664 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:58,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1352411004, now seen corresponding path program 2 times [2021-12-22 13:49:58,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:58,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115231403] [2021-12-22 13:49:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:58,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:58,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:58,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115231403] [2021-12-22 13:49:58,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115231403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:58,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:58,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:49:58,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477647557] [2021-12-22 13:49:58,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:58,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:49:58,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:58,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:49:58,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:49:58,758 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:49:58,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 68 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:58,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:58,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:49:58,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:59,002 INFO L129 PetriNetUnfolder]: 28/370 cut-off events. [2021-12-22 13:49:59,002 INFO L130 PetriNetUnfolder]: For 233/236 co-relation queries the response was YES. [2021-12-22 13:49:59,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 370 events. 28/370 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2217 event pairs, 4 based on Foata normal form. 5/369 useless extension candidates. Maximal degree in co-relation 762. Up to 52 conditions per place. [2021-12-22 13:49:59,003 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 62 selfloop transitions, 9 changer transitions 13/126 dead transitions. [2021-12-22 13:49:59,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 624 flow [2021-12-22 13:49:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:49:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-22 13:49:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 945 transitions. [2021-12-22 13:49:59,005 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2021-12-22 13:49:59,005 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 945 transitions. [2021-12-22 13:49:59,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 945 transitions. [2021-12-22 13:49:59,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:59,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 945 transitions. [2021-12-22 13:49:59,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0625) internal successors, (945), 16 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,008 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,009 INFO L186 Difference]: Start difference. First operand has 90 places, 68 transitions, 194 flow. Second operand 16 states and 945 transitions. [2021-12-22 13:49:59,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 624 flow [2021-12-22 13:49:59,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 126 transitions, 573 flow, removed 25 selfloop flow, removed 5 redundant places. [2021-12-22 13:49:59,011 INFO L242 Difference]: Finished difference. Result has 110 places, 75 transitions, 286 flow [2021-12-22 13:49:59,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=286, PETRI_PLACES=110, PETRI_TRANSITIONS=75} [2021-12-22 13:49:59,012 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2021-12-22 13:49:59,012 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 75 transitions, 286 flow [2021-12-22 13:49:59,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:59,012 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:59,012 INFO L254 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] [2021-12-22 13:49:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:49:59,013 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash -631538826, now seen corresponding path program 3 times [2021-12-22 13:49:59,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:59,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862242928] [2021-12-22 13:49:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:59,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:59,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:59,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862242928] [2021-12-22 13:49:59,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862242928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:59,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:59,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:49:59,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807375465] [2021-12-22 13:49:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:59,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:49:59,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:49:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:49:59,096 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:49:59,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 75 transitions, 286 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:59,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:59,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:49:59,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:59,248 INFO L129 PetriNetUnfolder]: 23/361 cut-off events. [2021-12-22 13:49:59,248 INFO L130 PetriNetUnfolder]: For 507/510 co-relation queries the response was YES. [2021-12-22 13:49:59,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 361 events. 23/361 cut-off events. For 507/510 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2202 event pairs, 3 based on Foata normal form. 2/355 useless extension candidates. Maximal degree in co-relation 859. Up to 84 conditions per place. [2021-12-22 13:49:59,250 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 33 selfloop transitions, 10 changer transitions 12/97 dead transitions. [2021-12-22 13:49:59,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 97 transitions, 534 flow [2021-12-22 13:49:59,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:49:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:49:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 583 transitions. [2021-12-22 13:49:59,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7197530864197531 [2021-12-22 13:49:59,251 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 583 transitions. [2021-12-22 13:49:59,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 583 transitions. [2021-12-22 13:49:59,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:59,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 583 transitions. [2021-12-22 13:49:59,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.3) internal successors, (583), 10 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,254 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,254 INFO L186 Difference]: Start difference. First operand has 110 places, 75 transitions, 286 flow. Second operand 10 states and 583 transitions. [2021-12-22 13:49:59,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 97 transitions, 534 flow [2021-12-22 13:49:59,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 97 transitions, 504 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-12-22 13:49:59,257 INFO L242 Difference]: Finished difference. Result has 111 places, 75 transitions, 305 flow [2021-12-22 13:49:59,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=305, PETRI_PLACES=111, PETRI_TRANSITIONS=75} [2021-12-22 13:49:59,257 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2021-12-22 13:49:59,257 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 75 transitions, 305 flow [2021-12-22 13:49:59,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:59,258 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:59,258 INFO L254 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] [2021-12-22 13:49:59,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:49:59,258 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1379330042, now seen corresponding path program 4 times [2021-12-22 13:49:59,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:59,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979956649] [2021-12-22 13:49:59,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:59,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:59,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:59,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979956649] [2021-12-22 13:49:59,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979956649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:59,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:59,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:49:59,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786147983] [2021-12-22 13:49:59,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:59,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:49:59,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:59,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:49:59,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:49:59,355 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:49:59,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 75 transitions, 305 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:59,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:59,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:49:59,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:59,524 INFO L129 PetriNetUnfolder]: 28/408 cut-off events. [2021-12-22 13:49:59,525 INFO L130 PetriNetUnfolder]: For 887/890 co-relation queries the response was YES. [2021-12-22 13:49:59,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 408 events. 28/408 cut-off events. For 887/890 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2623 event pairs, 8 based on Foata normal form. 4/405 useless extension candidates. Maximal degree in co-relation 1038. Up to 119 conditions per place. [2021-12-22 13:49:59,526 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 50 selfloop transitions, 6 changer transitions 11/109 dead transitions. [2021-12-22 13:49:59,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 109 transitions, 724 flow [2021-12-22 13:49:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:49:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:49:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 593 transitions. [2021-12-22 13:49:59,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7320987654320987 [2021-12-22 13:49:59,528 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 593 transitions. [2021-12-22 13:49:59,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 593 transitions. [2021-12-22 13:49:59,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:59,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 593 transitions. [2021-12-22 13:49:59,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.3) internal successors, (593), 10 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,530 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,530 INFO L186 Difference]: Start difference. First operand has 111 places, 75 transitions, 305 flow. Second operand 10 states and 593 transitions. [2021-12-22 13:49:59,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 109 transitions, 724 flow [2021-12-22 13:49:59,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 109 transitions, 657 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-12-22 13:49:59,533 INFO L242 Difference]: Finished difference. Result has 114 places, 77 transitions, 327 flow [2021-12-22 13:49:59,534 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=327, PETRI_PLACES=114, PETRI_TRANSITIONS=77} [2021-12-22 13:49:59,534 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2021-12-22 13:49:59,534 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 77 transitions, 327 flow [2021-12-22 13:49:59,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:59,534 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:59,535 INFO L254 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] [2021-12-22 13:49:59,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:49:59,535 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:59,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1732848334, now seen corresponding path program 5 times [2021-12-22 13:49:59,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:59,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338007144] [2021-12-22 13:49:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:59,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:59,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:59,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338007144] [2021-12-22 13:49:59,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338007144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:59,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:59,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:49:59,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828610615] [2021-12-22 13:49:59,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:59,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:49:59,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:59,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:49:59,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:49:59,618 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:49:59,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 77 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:59,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:59,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:49:59,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:59,805 INFO L129 PetriNetUnfolder]: 24/436 cut-off events. [2021-12-22 13:49:59,805 INFO L130 PetriNetUnfolder]: For 894/900 co-relation queries the response was YES. [2021-12-22 13:49:59,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 436 events. 24/436 cut-off events. For 894/900 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2975 event pairs, 12 based on Foata normal form. 4/429 useless extension candidates. Maximal degree in co-relation 1083. Up to 76 conditions per place. [2021-12-22 13:49:59,807 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 64 selfloop transitions, 8 changer transitions 9/123 dead transitions. [2021-12-22 13:49:59,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 123 transitions, 779 flow [2021-12-22 13:49:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:49:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:49:59,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 610 transitions. [2021-12-22 13:49:59,809 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2021-12-22 13:49:59,809 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 610 transitions. [2021-12-22 13:49:59,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 610 transitions. [2021-12-22 13:49:59,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:59,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 610 transitions. [2021-12-22 13:49:59,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,811 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,811 INFO L186 Difference]: Start difference. First operand has 114 places, 77 transitions, 327 flow. Second operand 10 states and 610 transitions. [2021-12-22 13:49:59,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 123 transitions, 779 flow [2021-12-22 13:49:59,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 723 flow, removed 25 selfloop flow, removed 6 redundant places. [2021-12-22 13:49:59,815 INFO L242 Difference]: Finished difference. Result has 120 places, 81 transitions, 401 flow [2021-12-22 13:49:59,815 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=401, PETRI_PLACES=120, PETRI_TRANSITIONS=81} [2021-12-22 13:49:59,815 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 46 predicate places. [2021-12-22 13:49:59,815 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 81 transitions, 401 flow [2021-12-22 13:49:59,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:49:59,816 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:59,816 INFO L254 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] [2021-12-22 13:49:59,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:49:59,816 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:59,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:59,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1744902709, now seen corresponding path program 2 times [2021-12-22 13:49:59,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:59,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378024527] [2021-12-22 13:49:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:59,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:59,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:59,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378024527] [2021-12-22 13:49:59,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378024527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:59,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:59,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:49:59,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245295571] [2021-12-22 13:49:59,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:59,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:59,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:59,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:59,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:59,894 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:49:59,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 81 transitions, 401 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:49:59,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:59,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:49:59,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:00,038 INFO L129 PetriNetUnfolder]: 21/419 cut-off events. [2021-12-22 13:50:00,038 INFO L130 PetriNetUnfolder]: For 977/983 co-relation queries the response was YES. [2021-12-22 13:50:00,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 419 events. 21/419 cut-off events. For 977/983 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2780 event pairs, 19 based on Foata normal form. 1/411 useless extension candidates. Maximal degree in co-relation 1073. Up to 100 conditions per place. [2021-12-22 13:50:00,040 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 49 selfloop transitions, 7 changer transitions 7/109 dead transitions. [2021-12-22 13:50:00,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 109 transitions, 702 flow [2021-12-22 13:50:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:50:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:50:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 552 transitions. [2021-12-22 13:50:00,042 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.757201646090535 [2021-12-22 13:50:00,042 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 552 transitions. [2021-12-22 13:50:00,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 552 transitions. [2021-12-22 13:50:00,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:00,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 552 transitions. [2021-12-22 13:50:00,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.333333333333336) internal successors, (552), 9 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,045 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,045 INFO L186 Difference]: Start difference. First operand has 120 places, 81 transitions, 401 flow. Second operand 9 states and 552 transitions. [2021-12-22 13:50:00,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 109 transitions, 702 flow [2021-12-22 13:50:00,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 109 transitions, 658 flow, removed 19 selfloop flow, removed 5 redundant places. [2021-12-22 13:50:00,052 INFO L242 Difference]: Finished difference. Result has 127 places, 84 transitions, 450 flow [2021-12-22 13:50:00,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=127, PETRI_TRANSITIONS=84} [2021-12-22 13:50:00,052 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 53 predicate places. [2021-12-22 13:50:00,053 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 84 transitions, 450 flow [2021-12-22 13:50:00,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:00,053 INFO L254 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] [2021-12-22 13:50:00,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:50:00,053 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:00,053 INFO L85 PathProgramCache]: Analyzing trace with hash 307404330, now seen corresponding path program 6 times [2021-12-22 13:50:00,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:00,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679703461] [2021-12-22 13:50:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:00,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:00,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:00,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679703461] [2021-12-22 13:50:00,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679703461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:00,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:00,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:00,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542110265] [2021-12-22 13:50:00,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:00,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:00,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:00,148 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:00,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 84 transitions, 450 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:00,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:00,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:00,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:00,314 INFO L129 PetriNetUnfolder]: 21/442 cut-off events. [2021-12-22 13:50:00,314 INFO L130 PetriNetUnfolder]: For 1205/1217 co-relation queries the response was YES. [2021-12-22 13:50:00,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 442 events. 21/442 cut-off events. For 1205/1217 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3004 event pairs, 10 based on Foata normal form. 3/437 useless extension candidates. Maximal degree in co-relation 1160. Up to 135 conditions per place. [2021-12-22 13:50:00,317 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 43 selfloop transitions, 16 changer transitions 10/111 dead transitions. [2021-12-22 13:50:00,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 111 transitions, 797 flow [2021-12-22 13:50:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 588 transitions. [2021-12-22 13:50:00,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.725925925925926 [2021-12-22 13:50:00,318 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 588 transitions. [2021-12-22 13:50:00,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 588 transitions. [2021-12-22 13:50:00,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:00,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 588 transitions. [2021-12-22 13:50:00,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.8) internal successors, (588), 10 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,321 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,321 INFO L186 Difference]: Start difference. First operand has 127 places, 84 transitions, 450 flow. Second operand 10 states and 588 transitions. [2021-12-22 13:50:00,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 111 transitions, 797 flow [2021-12-22 13:50:00,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 111 transitions, 761 flow, removed 16 selfloop flow, removed 4 redundant places. [2021-12-22 13:50:00,325 INFO L242 Difference]: Finished difference. Result has 136 places, 87 transitions, 526 flow [2021-12-22 13:50:00,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=526, PETRI_PLACES=136, PETRI_TRANSITIONS=87} [2021-12-22 13:50:00,326 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 62 predicate places. [2021-12-22 13:50:00,326 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 87 transitions, 526 flow [2021-12-22 13:50:00,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:00,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:00,326 INFO L254 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] [2021-12-22 13:50:00,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:50:00,327 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:00,327 INFO L85 PathProgramCache]: Analyzing trace with hash 260750753, now seen corresponding path program 3 times [2021-12-22 13:50:00,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:00,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181888119] [2021-12-22 13:50:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:00,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:00,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181888119] [2021-12-22 13:50:00,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181888119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:00,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:00,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:50:00,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877902985] [2021-12-22 13:50:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:00,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:50:00,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:50:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:50:00,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:50:00,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 87 transitions, 526 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:00,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:50:00,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:00,539 INFO L129 PetriNetUnfolder]: 18/451 cut-off events. [2021-12-22 13:50:00,539 INFO L130 PetriNetUnfolder]: For 1490/1504 co-relation queries the response was YES. [2021-12-22 13:50:00,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 451 events. 18/451 cut-off events. For 1490/1504 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3153 event pairs, 4 based on Foata normal form. 5/450 useless extension candidates. Maximal degree in co-relation 1217. Up to 125 conditions per place. [2021-12-22 13:50:00,541 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 47 selfloop transitions, 12 changer transitions 13/118 dead transitions. [2021-12-22 13:50:00,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 118 transitions, 940 flow [2021-12-22 13:50:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:50:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:50:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 549 transitions. [2021-12-22 13:50:00,542 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2021-12-22 13:50:00,542 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 549 transitions. [2021-12-22 13:50:00,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 549 transitions. [2021-12-22 13:50:00,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:00,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 549 transitions. [2021-12-22 13:50:00,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,544 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,545 INFO L186 Difference]: Start difference. First operand has 136 places, 87 transitions, 526 flow. Second operand 9 states and 549 transitions. [2021-12-22 13:50:00,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 118 transitions, 940 flow [2021-12-22 13:50:00,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 118 transitions, 880 flow, removed 21 selfloop flow, removed 5 redundant places. [2021-12-22 13:50:00,551 INFO L242 Difference]: Finished difference. Result has 142 places, 89 transitions, 574 flow [2021-12-22 13:50:00,552 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=574, PETRI_PLACES=142, PETRI_TRANSITIONS=89} [2021-12-22 13:50:00,552 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 68 predicate places. [2021-12-22 13:50:00,552 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 89 transitions, 574 flow [2021-12-22 13:50:00,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,552 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:00,553 INFO L254 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] [2021-12-22 13:50:00,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:50:00,553 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:00,553 INFO L85 PathProgramCache]: Analyzing trace with hash -658061558, now seen corresponding path program 7 times [2021-12-22 13:50:00,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:00,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012359964] [2021-12-22 13:50:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:00,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:00,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:00,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012359964] [2021-12-22 13:50:00,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012359964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:00,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:00,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:00,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687613923] [2021-12-22 13:50:00,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:00,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:00,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:00,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:00,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:00,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 89 transitions, 574 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:00,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:00,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:00,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:00,816 INFO L129 PetriNetUnfolder]: 17/418 cut-off events. [2021-12-22 13:50:00,816 INFO L130 PetriNetUnfolder]: For 1553/1567 co-relation queries the response was YES. [2021-12-22 13:50:00,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 418 events. 17/418 cut-off events. For 1553/1567 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2820 event pairs, 11 based on Foata normal form. 5/415 useless extension candidates. Maximal degree in co-relation 1158. Up to 86 conditions per place. [2021-12-22 13:50:00,818 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 59 selfloop transitions, 12 changer transitions 11/124 dead transitions. [2021-12-22 13:50:00,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 124 transitions, 1038 flow [2021-12-22 13:50:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 597 transitions. [2021-12-22 13:50:00,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.737037037037037 [2021-12-22 13:50:00,820 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 597 transitions. [2021-12-22 13:50:00,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 597 transitions. [2021-12-22 13:50:00,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:00,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 597 transitions. [2021-12-22 13:50:00,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.7) internal successors, (597), 10 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,822 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,822 INFO L186 Difference]: Start difference. First operand has 142 places, 89 transitions, 574 flow. Second operand 10 states and 597 transitions. [2021-12-22 13:50:00,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 124 transitions, 1038 flow [2021-12-22 13:50:00,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 124 transitions, 981 flow, removed 20 selfloop flow, removed 5 redundant places. [2021-12-22 13:50:00,828 INFO L242 Difference]: Finished difference. Result has 151 places, 94 transitions, 675 flow [2021-12-22 13:50:00,828 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=675, PETRI_PLACES=151, PETRI_TRANSITIONS=94} [2021-12-22 13:50:00,829 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 77 predicate places. [2021-12-22 13:50:00,829 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 94 transitions, 675 flow [2021-12-22 13:50:00,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:00,829 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:00,829 INFO L254 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] [2021-12-22 13:50:00,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:50:00,830 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:00,830 INFO L85 PathProgramCache]: Analyzing trace with hash 432307051, now seen corresponding path program 4 times [2021-12-22 13:50:00,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:00,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462750538] [2021-12-22 13:50:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:00,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:00,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:00,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462750538] [2021-12-22 13:50:00,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462750538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:00,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:00,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:50:00,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330959940] [2021-12-22 13:50:00,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:00,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:50:00,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:50:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:50:00,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:50:00,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 94 transitions, 675 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:00,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:00,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:50:00,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:01,061 INFO L129 PetriNetUnfolder]: 17/403 cut-off events. [2021-12-22 13:50:01,061 INFO L130 PetriNetUnfolder]: For 1636/1652 co-relation queries the response was YES. [2021-12-22 13:50:01,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 403 events. 17/403 cut-off events. For 1636/1652 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2658 event pairs, 7 based on Foata normal form. 6/401 useless extension candidates. Maximal degree in co-relation 1162. Up to 124 conditions per place. [2021-12-22 13:50:01,064 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 40 selfloop transitions, 10 changer transitions 19/115 dead transitions. [2021-12-22 13:50:01,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 115 transitions, 1043 flow [2021-12-22 13:50:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:50:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:50:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 543 transitions. [2021-12-22 13:50:01,066 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7448559670781894 [2021-12-22 13:50:01,066 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 543 transitions. [2021-12-22 13:50:01,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 543 transitions. [2021-12-22 13:50:01,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:01,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 543 transitions. [2021-12-22 13:50:01,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.333333333333336) internal successors, (543), 9 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,069 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,069 INFO L186 Difference]: Start difference. First operand has 151 places, 94 transitions, 675 flow. Second operand 9 states and 543 transitions. [2021-12-22 13:50:01,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 115 transitions, 1043 flow [2021-12-22 13:50:01,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 115 transitions, 1006 flow, removed 17 selfloop flow, removed 5 redundant places. [2021-12-22 13:50:01,075 INFO L242 Difference]: Finished difference. Result has 154 places, 90 transitions, 594 flow [2021-12-22 13:50:01,075 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=594, PETRI_PLACES=154, PETRI_TRANSITIONS=90} [2021-12-22 13:50:01,075 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 80 predicate places. [2021-12-22 13:50:01,075 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 90 transitions, 594 flow [2021-12-22 13:50:01,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:01,076 INFO L254 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] [2021-12-22 13:50:01,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 13:50:01,076 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:01,077 INFO L85 PathProgramCache]: Analyzing trace with hash -881258538, now seen corresponding path program 8 times [2021-12-22 13:50:01,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:01,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424776572] [2021-12-22 13:50:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:01,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:01,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424776572] [2021-12-22 13:50:01,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424776572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:01,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:01,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:01,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900532090] [2021-12-22 13:50:01,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:01,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:01,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:01,155 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:01,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 90 transitions, 594 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:01,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:01,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:01,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:01,302 INFO L129 PetriNetUnfolder]: 14/364 cut-off events. [2021-12-22 13:50:01,302 INFO L130 PetriNetUnfolder]: For 1374/1391 co-relation queries the response was YES. [2021-12-22 13:50:01,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 364 events. 14/364 cut-off events. For 1374/1391 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2264 event pairs, 4 based on Foata normal form. 5/363 useless extension candidates. Maximal degree in co-relation 1015. Up to 109 conditions per place. [2021-12-22 13:50:01,304 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 48 selfloop transitions, 13 changer transitions 13/116 dead transitions. [2021-12-22 13:50:01,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 116 transitions, 958 flow [2021-12-22 13:50:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-12-22 13:50:01,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-12-22 13:50:01,305 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-12-22 13:50:01,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-12-22 13:50:01,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:01,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-12-22 13:50:01,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,307 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,308 INFO L186 Difference]: Start difference. First operand has 154 places, 90 transitions, 594 flow. Second operand 10 states and 590 transitions. [2021-12-22 13:50:01,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 116 transitions, 958 flow [2021-12-22 13:50:01,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 116 transitions, 908 flow, removed 18 selfloop flow, removed 8 redundant places. [2021-12-22 13:50:01,313 INFO L242 Difference]: Finished difference. Result has 153 places, 91 transitions, 615 flow [2021-12-22 13:50:01,313 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=615, PETRI_PLACES=153, PETRI_TRANSITIONS=91} [2021-12-22 13:50:01,313 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 79 predicate places. [2021-12-22 13:50:01,314 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 91 transitions, 615 flow [2021-12-22 13:50:01,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:01,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:01,314 INFO L254 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] [2021-12-22 13:50:01,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 13:50:01,314 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:01,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2144980316, now seen corresponding path program 9 times [2021-12-22 13:50:01,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:01,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105904022] [2021-12-22 13:50:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:01,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:01,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:01,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105904022] [2021-12-22 13:50:01,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105904022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:01,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:01,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:01,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452942041] [2021-12-22 13:50:01,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:01,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:01,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:01,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:01,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:01,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:01,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 91 transitions, 615 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:01,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:01,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:01,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:01,556 INFO L129 PetriNetUnfolder]: 13/346 cut-off events. [2021-12-22 13:50:01,557 INFO L130 PetriNetUnfolder]: For 1285/1299 co-relation queries the response was YES. [2021-12-22 13:50:01,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 346 events. 13/346 cut-off events. For 1285/1299 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2081 event pairs, 5 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 978. Up to 109 conditions per place. [2021-12-22 13:50:01,559 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 40 selfloop transitions, 10 changer transitions 17/109 dead transitions. [2021-12-22 13:50:01,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 109 transitions, 917 flow [2021-12-22 13:50:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 583 transitions. [2021-12-22 13:50:01,563 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7197530864197531 [2021-12-22 13:50:01,563 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 583 transitions. [2021-12-22 13:50:01,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 583 transitions. [2021-12-22 13:50:01,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:01,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 583 transitions. [2021-12-22 13:50:01,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.3) internal successors, (583), 10 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,568 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,568 INFO L186 Difference]: Start difference. First operand has 153 places, 91 transitions, 615 flow. Second operand 10 states and 583 transitions. [2021-12-22 13:50:01,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 109 transitions, 917 flow [2021-12-22 13:50:01,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 109 transitions, 875 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-22 13:50:01,574 INFO L242 Difference]: Finished difference. Result has 155 places, 88 transitions, 568 flow [2021-12-22 13:50:01,575 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=568, PETRI_PLACES=155, PETRI_TRANSITIONS=88} [2021-12-22 13:50:01,575 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 81 predicate places. [2021-12-22 13:50:01,575 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 88 transitions, 568 flow [2021-12-22 13:50:01,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:01,576 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:01,576 INFO L254 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] [2021-12-22 13:50:01,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 13:50:01,576 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1232039598, now seen corresponding path program 10 times [2021-12-22 13:50:01,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:01,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986378846] [2021-12-22 13:50:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:01,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:01,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:01,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986378846] [2021-12-22 13:50:01,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986378846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:01,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:01,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:01,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732687595] [2021-12-22 13:50:01,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:01,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:01,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:01,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:01,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:01,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 88 transitions, 568 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:01,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:01,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:01,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:01,834 INFO L129 PetriNetUnfolder]: 13/312 cut-off events. [2021-12-22 13:50:01,835 INFO L130 PetriNetUnfolder]: For 1246/1262 co-relation queries the response was YES. [2021-12-22 13:50:01,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 312 events. 13/312 cut-off events. For 1246/1262 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1781 event pairs, 7 based on Foata normal form. 7/314 useless extension candidates. Maximal degree in co-relation 908. Up to 73 conditions per place. [2021-12-22 13:50:01,836 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 46 selfloop transitions, 9 changer transitions 12/109 dead transitions. [2021-12-22 13:50:01,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 109 transitions, 878 flow [2021-12-22 13:50:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-12-22 13:50:01,839 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-12-22 13:50:01,839 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-12-22 13:50:01,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-12-22 13:50:01,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:01,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-12-22 13:50:01,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,842 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,842 INFO L186 Difference]: Start difference. First operand has 155 places, 88 transitions, 568 flow. Second operand 10 states and 590 transitions. [2021-12-22 13:50:01,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 109 transitions, 878 flow [2021-12-22 13:50:01,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 109 transitions, 822 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-12-22 13:50:01,848 INFO L242 Difference]: Finished difference. Result has 151 places, 88 transitions, 576 flow [2021-12-22 13:50:01,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=576, PETRI_PLACES=151, PETRI_TRANSITIONS=88} [2021-12-22 13:50:01,848 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 77 predicate places. [2021-12-22 13:50:01,848 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 88 transitions, 576 flow [2021-12-22 13:50:01,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:01,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:01,849 INFO L254 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] [2021-12-22 13:50:01,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 13:50:01,849 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:01,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1022226839, now seen corresponding path program 5 times [2021-12-22 13:50:01,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:01,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940568818] [2021-12-22 13:50:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:01,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:01,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940568818] [2021-12-22 13:50:01,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940568818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:01,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:01,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:50:01,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281509022] [2021-12-22 13:50:01,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:01,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:50:01,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:50:01,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:50:01,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-22 13:50:01,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 88 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:01,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:01,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-22 13:50:01,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:02,065 INFO L129 PetriNetUnfolder]: 11/286 cut-off events. [2021-12-22 13:50:02,066 INFO L130 PetriNetUnfolder]: For 1098/1112 co-relation queries the response was YES. [2021-12-22 13:50:02,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 286 events. 11/286 cut-off events. For 1098/1112 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1555 event pairs, 8 based on Foata normal form. 6/287 useless extension candidates. Maximal degree in co-relation 844. Up to 86 conditions per place. [2021-12-22 13:50:02,067 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 34 selfloop transitions, 4 changer transitions 20/103 dead transitions. [2021-12-22 13:50:02,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 103 transitions, 832 flow [2021-12-22 13:50:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:50:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:50:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 541 transitions. [2021-12-22 13:50:02,070 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7421124828532236 [2021-12-22 13:50:02,070 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 541 transitions. [2021-12-22 13:50:02,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 541 transitions. [2021-12-22 13:50:02,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:02,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 541 transitions. [2021-12-22 13:50:02,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.111111111111114) internal successors, (541), 9 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,073 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,074 INFO L186 Difference]: Start difference. First operand has 151 places, 88 transitions, 576 flow. Second operand 9 states and 541 transitions. [2021-12-22 13:50:02,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 103 transitions, 832 flow [2021-12-22 13:50:02,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 103 transitions, 779 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-22 13:50:02,078 INFO L242 Difference]: Finished difference. Result has 149 places, 82 transitions, 452 flow [2021-12-22 13:50:02,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=452, PETRI_PLACES=149, PETRI_TRANSITIONS=82} [2021-12-22 13:50:02,081 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 75 predicate places. [2021-12-22 13:50:02,081 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 82 transitions, 452 flow [2021-12-22 13:50:02,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,081 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:02,081 INFO L254 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] [2021-12-22 13:50:02,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 13:50:02,083 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2140697048, now seen corresponding path program 11 times [2021-12-22 13:50:02,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993069902] [2021-12-22 13:50:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:02,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:02,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993069902] [2021-12-22 13:50:02,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993069902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:02,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:02,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:02,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756220583] [2021-12-22 13:50:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:02,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:02,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:02,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:02,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:02,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:02,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 82 transitions, 452 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:02,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:02,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:02,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:02,294 INFO L129 PetriNetUnfolder]: 11/229 cut-off events. [2021-12-22 13:50:02,295 INFO L130 PetriNetUnfolder]: For 725/738 co-relation queries the response was YES. [2021-12-22 13:50:02,295 INFO L84 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 229 events. 11/229 cut-off events. For 725/738 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1031 event pairs, 7 based on Foata normal form. 6/229 useless extension candidates. Maximal degree in co-relation 670. Up to 60 conditions per place. [2021-12-22 13:50:02,296 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 40 selfloop transitions, 6 changer transitions 13/101 dead transitions. [2021-12-22 13:50:02,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 101 transitions, 693 flow [2021-12-22 13:50:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 589 transitions. [2021-12-22 13:50:02,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7271604938271605 [2021-12-22 13:50:02,297 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 589 transitions. [2021-12-22 13:50:02,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 589 transitions. [2021-12-22 13:50:02,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:02,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 589 transitions. [2021-12-22 13:50:02,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.9) internal successors, (589), 10 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,302 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,302 INFO L186 Difference]: Start difference. First operand has 149 places, 82 transitions, 452 flow. Second operand 10 states and 589 transitions. [2021-12-22 13:50:02,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 101 transitions, 693 flow [2021-12-22 13:50:02,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 101 transitions, 648 flow, removed 18 selfloop flow, removed 11 redundant places. [2021-12-22 13:50:02,306 INFO L242 Difference]: Finished difference. Result has 140 places, 79 transitions, 403 flow [2021-12-22 13:50:02,306 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=403, PETRI_PLACES=140, PETRI_TRANSITIONS=79} [2021-12-22 13:50:02,308 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 66 predicate places. [2021-12-22 13:50:02,308 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 79 transitions, 403 flow [2021-12-22 13:50:02,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:02,308 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:02,308 INFO L254 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] [2021-12-22 13:50:02,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 13:50:02,309 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:02,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:02,309 INFO L85 PathProgramCache]: Analyzing trace with hash 112076268, now seen corresponding path program 12 times [2021-12-22 13:50:02,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:02,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254135185] [2021-12-22 13:50:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:02,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:02,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:02,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254135185] [2021-12-22 13:50:02,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254135185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:02,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:02,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:02,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619295728] [2021-12-22 13:50:02,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:02,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:02,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:02,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:02,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:02,391 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:02,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 79 transitions, 403 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:02,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:02,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:02,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:02,524 INFO L129 PetriNetUnfolder]: 10/220 cut-off events. [2021-12-22 13:50:02,524 INFO L130 PetriNetUnfolder]: For 534/545 co-relation queries the response was YES. [2021-12-22 13:50:02,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 220 events. 10/220 cut-off events. For 534/545 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 951 event pairs, 7 based on Foata normal form. 5/220 useless extension candidates. Maximal degree in co-relation 617. Up to 60 conditions per place. [2021-12-22 13:50:02,525 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 38 selfloop transitions, 7 changer transitions 11/98 dead transitions. [2021-12-22 13:50:02,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 98 transitions, 636 flow [2021-12-22 13:50:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 587 transitions. [2021-12-22 13:50:02,526 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7246913580246913 [2021-12-22 13:50:02,526 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 587 transitions. [2021-12-22 13:50:02,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 587 transitions. [2021-12-22 13:50:02,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:02,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 587 transitions. [2021-12-22 13:50:02,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.7) internal successors, (587), 10 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,528 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,528 INFO L186 Difference]: Start difference. First operand has 140 places, 79 transitions, 403 flow. Second operand 10 states and 587 transitions. [2021-12-22 13:50:02,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 98 transitions, 636 flow [2021-12-22 13:50:02,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 98 transitions, 584 flow, removed 16 selfloop flow, removed 11 redundant places. [2021-12-22 13:50:02,531 INFO L242 Difference]: Finished difference. Result has 137 places, 80 transitions, 415 flow [2021-12-22 13:50:02,532 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=415, PETRI_PLACES=137, PETRI_TRANSITIONS=80} [2021-12-22 13:50:02,532 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 63 predicate places. [2021-12-22 13:50:02,532 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 80 transitions, 415 flow [2021-12-22 13:50:02,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:02,533 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:02,533 INFO L254 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] [2021-12-22 13:50:02,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 13:50:02,533 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1443359976, now seen corresponding path program 13 times [2021-12-22 13:50:02,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:02,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963700341] [2021-12-22 13:50:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:02,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:02,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:02,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963700341] [2021-12-22 13:50:02,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963700341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:02,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:02,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:02,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121383288] [2021-12-22 13:50:02,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:02,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:02,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:02,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:02,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:02,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:02,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 80 transitions, 415 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:02,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:02,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:02,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:02,740 INFO L129 PetriNetUnfolder]: 10/204 cut-off events. [2021-12-22 13:50:02,740 INFO L130 PetriNetUnfolder]: For 458/469 co-relation queries the response was YES. [2021-12-22 13:50:02,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 204 events. 10/204 cut-off events. For 458/469 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 837 event pairs, 7 based on Foata normal form. 5/203 useless extension candidates. Maximal degree in co-relation 571. Up to 60 conditions per place. [2021-12-22 13:50:02,742 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 29 selfloop transitions, 3 changer transitions 17/91 dead transitions. [2021-12-22 13:50:02,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 91 transitions, 588 flow [2021-12-22 13:50:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 580 transitions. [2021-12-22 13:50:02,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7160493827160493 [2021-12-22 13:50:02,743 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 580 transitions. [2021-12-22 13:50:02,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 580 transitions. [2021-12-22 13:50:02,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:02,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 580 transitions. [2021-12-22 13:50:02,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,745 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,745 INFO L186 Difference]: Start difference. First operand has 137 places, 80 transitions, 415 flow. Second operand 10 states and 580 transitions. [2021-12-22 13:50:02,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 91 transitions, 588 flow [2021-12-22 13:50:02,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 91 transitions, 551 flow, removed 13 selfloop flow, removed 7 redundant places. [2021-12-22 13:50:02,748 INFO L242 Difference]: Finished difference. Result has 138 places, 74 transitions, 331 flow [2021-12-22 13:50:02,748 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=331, PETRI_PLACES=138, PETRI_TRANSITIONS=74} [2021-12-22 13:50:02,748 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 64 predicate places. [2021-12-22 13:50:02,748 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 74 transitions, 331 flow [2021-12-22 13:50:02,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:02,749 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:02,749 INFO L254 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] [2021-12-22 13:50:02,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 13:50:02,749 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:02,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2036479358, now seen corresponding path program 14 times [2021-12-22 13:50:02,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:02,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190459390] [2021-12-22 13:50:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:02,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:02,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:02,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190459390] [2021-12-22 13:50:02,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190459390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:02,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:02,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:02,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472756492] [2021-12-22 13:50:02,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:02,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:02,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:02,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:02,837 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:02,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 74 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:02,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:02,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:02,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:02,969 INFO L129 PetriNetUnfolder]: 7/167 cut-off events. [2021-12-22 13:50:02,970 INFO L130 PetriNetUnfolder]: For 325/334 co-relation queries the response was YES. [2021-12-22 13:50:02,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 167 events. 7/167 cut-off events. For 325/334 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 567 event pairs, 0 based on Foata normal form. 4/168 useless extension candidates. Maximal degree in co-relation 445. Up to 31 conditions per place. [2021-12-22 13:50:02,971 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 26 selfloop transitions, 10 changer transitions 11/89 dead transitions. [2021-12-22 13:50:02,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 89 transitions, 541 flow [2021-12-22 13:50:02,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 577 transitions. [2021-12-22 13:50:02,972 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7123456790123457 [2021-12-22 13:50:02,973 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 577 transitions. [2021-12-22 13:50:02,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 577 transitions. [2021-12-22 13:50:02,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:02,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 577 transitions. [2021-12-22 13:50:02,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.7) internal successors, (577), 10 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,976 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,976 INFO L186 Difference]: Start difference. First operand has 138 places, 74 transitions, 331 flow. Second operand 10 states and 577 transitions. [2021-12-22 13:50:02,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 89 transitions, 541 flow [2021-12-22 13:50:02,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 89 transitions, 492 flow, removed 16 selfloop flow, removed 13 redundant places. [2021-12-22 13:50:02,978 INFO L242 Difference]: Finished difference. Result has 123 places, 74 transitions, 327 flow [2021-12-22 13:50:02,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=327, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2021-12-22 13:50:02,979 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 49 predicate places. [2021-12-22 13:50:02,979 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 327 flow [2021-12-22 13:50:02,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:02,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:02,980 INFO L254 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] [2021-12-22 13:50:02,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 13:50:02,980 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:02,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash 635828710, now seen corresponding path program 15 times [2021-12-22 13:50:02,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:02,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095250665] [2021-12-22 13:50:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:02,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:03,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:03,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095250665] [2021-12-22 13:50:03,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095250665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:03,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:03,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:03,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622722775] [2021-12-22 13:50:03,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:03,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:03,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:03,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:03,067 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:03,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:03,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:03,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:03,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:03,216 INFO L129 PetriNetUnfolder]: 5/192 cut-off events. [2021-12-22 13:50:03,217 INFO L130 PetriNetUnfolder]: For 337/346 co-relation queries the response was YES. [2021-12-22 13:50:03,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 192 events. 5/192 cut-off events. For 337/346 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 773 event pairs, 4 based on Foata normal form. 4/193 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2021-12-22 13:50:03,218 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 41 selfloop transitions, 7 changer transitions 9/99 dead transitions. [2021-12-22 13:50:03,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 571 flow [2021-12-22 13:50:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-12-22 13:50:03,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-12-22 13:50:03,219 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-12-22 13:50:03,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-12-22 13:50:03,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:03,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-12-22 13:50:03,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,221 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,222 INFO L186 Difference]: Start difference. First operand has 123 places, 74 transitions, 327 flow. Second operand 10 states and 590 transitions. [2021-12-22 13:50:03,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 571 flow [2021-12-22 13:50:03,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 515 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-22 13:50:03,224 INFO L242 Difference]: Finished difference. Result has 125 places, 76 transitions, 347 flow [2021-12-22 13:50:03,224 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=125, PETRI_TRANSITIONS=76} [2021-12-22 13:50:03,225 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 51 predicate places. [2021-12-22 13:50:03,225 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 76 transitions, 347 flow [2021-12-22 13:50:03,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:03,225 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:03,226 INFO L254 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] [2021-12-22 13:50:03,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 13:50:03,226 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash -625509532, now seen corresponding path program 16 times [2021-12-22 13:50:03,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:03,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684512154] [2021-12-22 13:50:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:03,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:03,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:03,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684512154] [2021-12-22 13:50:03,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684512154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:03,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:03,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:03,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942277414] [2021-12-22 13:50:03,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:03,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:03,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:03,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:03,328 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:03,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 76 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:03,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:03,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:03,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:03,463 INFO L129 PetriNetUnfolder]: 4/187 cut-off events. [2021-12-22 13:50:03,463 INFO L130 PetriNetUnfolder]: For 272/280 co-relation queries the response was YES. [2021-12-22 13:50:03,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 187 events. 4/187 cut-off events. For 272/280 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 730 event pairs, 1 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 484. Up to 39 conditions per place. [2021-12-22 13:50:03,464 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 35 selfloop transitions, 10 changer transitions 9/96 dead transitions. [2021-12-22 13:50:03,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 96 transitions, 580 flow [2021-12-22 13:50:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 583 transitions. [2021-12-22 13:50:03,466 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7197530864197531 [2021-12-22 13:50:03,466 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 583 transitions. [2021-12-22 13:50:03,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 583 transitions. [2021-12-22 13:50:03,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:03,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 583 transitions. [2021-12-22 13:50:03,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.3) internal successors, (583), 10 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,468 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,468 INFO L186 Difference]: Start difference. First operand has 125 places, 76 transitions, 347 flow. Second operand 10 states and 583 transitions. [2021-12-22 13:50:03,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 96 transitions, 580 flow [2021-12-22 13:50:03,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 96 transitions, 552 flow, removed 9 selfloop flow, removed 6 redundant places. [2021-12-22 13:50:03,470 INFO L242 Difference]: Finished difference. Result has 130 places, 77 transitions, 380 flow [2021-12-22 13:50:03,470 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=380, PETRI_PLACES=130, PETRI_TRANSITIONS=77} [2021-12-22 13:50:03,470 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 56 predicate places. [2021-12-22 13:50:03,471 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 380 flow [2021-12-22 13:50:03,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:03,471 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:03,471 INFO L254 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] [2021-12-22 13:50:03,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-22 13:50:03,471 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash 383792464, now seen corresponding path program 17 times [2021-12-22 13:50:03,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:03,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643040789] [2021-12-22 13:50:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:03,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:03,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:03,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643040789] [2021-12-22 13:50:03,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643040789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:03,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:03,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:03,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825371752] [2021-12-22 13:50:03,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:03,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:03,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:03,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:03,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 77 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:03,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:03,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:03,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:03,664 INFO L129 PetriNetUnfolder]: 4/173 cut-off events. [2021-12-22 13:50:03,664 INFO L130 PetriNetUnfolder]: For 342/350 co-relation queries the response was YES. [2021-12-22 13:50:03,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 173 events. 4/173 cut-off events. For 342/350 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 629 event pairs, 3 based on Foata normal form. 4/173 useless extension candidates. Maximal degree in co-relation 464. Up to 32 conditions per place. [2021-12-22 13:50:03,665 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 33 selfloop transitions, 5 changer transitions 14/94 dead transitions. [2021-12-22 13:50:03,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 94 transitions, 579 flow [2021-12-22 13:50:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 584 transitions. [2021-12-22 13:50:03,666 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7209876543209877 [2021-12-22 13:50:03,666 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 584 transitions. [2021-12-22 13:50:03,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 584 transitions. [2021-12-22 13:50:03,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:03,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 584 transitions. [2021-12-22 13:50:03,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.4) internal successors, (584), 10 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,668 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,668 INFO L186 Difference]: Start difference. First operand has 130 places, 77 transitions, 380 flow. Second operand 10 states and 584 transitions. [2021-12-22 13:50:03,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 94 transitions, 579 flow [2021-12-22 13:50:03,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 94 transitions, 534 flow, removed 11 selfloop flow, removed 9 redundant places. [2021-12-22 13:50:03,671 INFO L242 Difference]: Finished difference. Result has 131 places, 74 transitions, 330 flow [2021-12-22 13:50:03,671 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=330, PETRI_PLACES=131, PETRI_TRANSITIONS=74} [2021-12-22 13:50:03,671 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 57 predicate places. [2021-12-22 13:50:03,671 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 74 transitions, 330 flow [2021-12-22 13:50:03,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:03,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:03,672 INFO L254 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] [2021-12-22 13:50:03,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-22 13:50:03,672 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1668405252, now seen corresponding path program 18 times [2021-12-22 13:50:03,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:03,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054443199] [2021-12-22 13:50:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:03,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:03,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:03,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054443199] [2021-12-22 13:50:03,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054443199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:03,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:03,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:03,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509671132] [2021-12-22 13:50:03,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:03,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:03,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:03,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:03,752 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:03,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 74 transitions, 330 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:03,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:03,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:03,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:03,873 INFO L129 PetriNetUnfolder]: 3/142 cut-off events. [2021-12-22 13:50:03,873 INFO L130 PetriNetUnfolder]: For 214/220 co-relation queries the response was YES. [2021-12-22 13:50:03,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 142 events. 3/142 cut-off events. For 214/220 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 399 event pairs, 0 based on Foata normal form. 3/142 useless extension candidates. Maximal degree in co-relation 376. Up to 27 conditions per place. [2021-12-22 13:50:03,874 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 24 selfloop transitions, 5 changer transitions 15/86 dead transitions. [2021-12-22 13:50:03,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 86 transitions, 502 flow [2021-12-22 13:50:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 576 transitions. [2021-12-22 13:50:03,875 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2021-12-22 13:50:03,875 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 576 transitions. [2021-12-22 13:50:03,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 576 transitions. [2021-12-22 13:50:03,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:03,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 576 transitions. [2021-12-22 13:50:03,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.6) internal successors, (576), 10 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,877 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,877 INFO L186 Difference]: Start difference. First operand has 131 places, 74 transitions, 330 flow. Second operand 10 states and 576 transitions. [2021-12-22 13:50:03,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 86 transitions, 502 flow [2021-12-22 13:50:03,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 86 transitions, 464 flow, removed 10 selfloop flow, removed 11 redundant places. [2021-12-22 13:50:03,880 INFO L242 Difference]: Finished difference. Result has 125 places, 69 transitions, 263 flow [2021-12-22 13:50:03,881 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=125, PETRI_TRANSITIONS=69} [2021-12-22 13:50:03,881 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 51 predicate places. [2021-12-22 13:50:03,881 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 69 transitions, 263 flow [2021-12-22 13:50:03,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:03,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:03,882 INFO L254 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] [2021-12-22 13:50:03,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-22 13:50:03,882 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:03,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1607529690, now seen corresponding path program 19 times [2021-12-22 13:50:03,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:03,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383213168] [2021-12-22 13:50:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:03,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:03,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383213168] [2021-12-22 13:50:03,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383213168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:03,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:03,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:03,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369597628] [2021-12-22 13:50:03,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:03,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:03,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:03,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:03,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 69 transitions, 263 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:03,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:03,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:03,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:04,114 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-12-22 13:50:04,114 INFO L130 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2021-12-22 13:50:04,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 137 events. 0/137 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 362 event pairs, 0 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-12-22 13:50:04,115 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 20 selfloop transitions, 7 changer transitions 14/83 dead transitions. [2021-12-22 13:50:04,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 83 transitions, 465 flow [2021-12-22 13:50:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 574 transitions. [2021-12-22 13:50:04,117 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7086419753086419 [2021-12-22 13:50:04,117 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 574 transitions. [2021-12-22 13:50:04,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 574 transitions. [2021-12-22 13:50:04,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:04,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 574 transitions. [2021-12-22 13:50:04,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.4) internal successors, (574), 10 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:04,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:04,119 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:04,119 INFO L186 Difference]: Start difference. First operand has 125 places, 69 transitions, 263 flow. Second operand 10 states and 574 transitions. [2021-12-22 13:50:04,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 83 transitions, 465 flow [2021-12-22 13:50:04,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 83 transitions, 388 flow, removed 9 selfloop flow, removed 16 redundant places. [2021-12-22 13:50:04,121 INFO L242 Difference]: Finished difference. Result has 113 places, 69 transitions, 244 flow [2021-12-22 13:50:04,121 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=244, PETRI_PLACES=113, PETRI_TRANSITIONS=69} [2021-12-22 13:50:04,122 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2021-12-22 13:50:04,122 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 69 transitions, 244 flow [2021-12-22 13:50:04,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:04,122 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:04,122 INFO L254 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] [2021-12-22 13:50:04,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-22 13:50:04,122 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:04,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:04,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1409584476, now seen corresponding path program 20 times [2021-12-22 13:50:04,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:04,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882008513] [2021-12-22 13:50:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:04,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:04,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:04,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882008513] [2021-12-22 13:50:04,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882008513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:04,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:04,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:50:04,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073302155] [2021-12-22 13:50:04,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:04,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:50:04,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:04,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:50:04,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:50:04,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-22 13:50:04,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 69 transitions, 244 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:04,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:04,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-22 13:50:04,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:04,324 INFO L129 PetriNetUnfolder]: 0/99 cut-off events. [2021-12-22 13:50:04,324 INFO L130 PetriNetUnfolder]: For 73/75 co-relation queries the response was YES. [2021-12-22 13:50:04,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 99 events. 0/99 cut-off events. For 73/75 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 163 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-12-22 13:50:04,325 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 0 selfloop transitions, 0 changer transitions 71/71 dead transitions. [2021-12-22 13:50:04,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 71 transitions, 348 flow [2021-12-22 13:50:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:50:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:50:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 566 transitions. [2021-12-22 13:50:04,326 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6987654320987654 [2021-12-22 13:50:04,326 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 566 transitions. [2021-12-22 13:50:04,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 566 transitions. [2021-12-22 13:50:04,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:04,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 566 transitions. [2021-12-22 13:50:04,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:04,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:04,328 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:04,328 INFO L186 Difference]: Start difference. First operand has 113 places, 69 transitions, 244 flow. Second operand 10 states and 566 transitions. [2021-12-22 13:50:04,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 71 transitions, 348 flow [2021-12-22 13:50:04,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 71 transitions, 314 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-22 13:50:04,329 INFO L242 Difference]: Finished difference. Result has 107 places, 0 transitions, 0 flow [2021-12-22 13:50:04,330 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=107, PETRI_TRANSITIONS=0} [2021-12-22 13:50:04,330 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 33 predicate places. [2021-12-22 13:50:04,330 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 0 transitions, 0 flow [2021-12-22 13:50:04,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 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) [2021-12-22 13:50:04,333 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-22 13:50:04,334 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-22 13:50:04,334 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-22 13:50:04,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-22 13:50:04,337 INFO L732 BasicCegarLoop]: Path program histogram: [20, 10, 5, 3] [2021-12-22 13:50:04,338 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-22 13:50:04,338 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 13:50:04,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 01:50:04 BasicIcfg [2021-12-22 13:50:04,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 13:50:04,344 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 13:50:04,344 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 13:50:04,344 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 13:50:04,344 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:49:54" (3/4) ... [2021-12-22 13:50:04,346 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 13:50:04,350 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-22 13:50:04,351 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-22 13:50:04,354 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-12-22 13:50:04,354 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-22 13:50:04,354 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 13:50:04,355 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 13:50:04,377 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 13:50:04,378 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 13:50:04,378 INFO L158 Benchmark]: Toolchain (without parser) took 10880.71ms. Allocated memory was 104.9MB in the beginning and 234.9MB in the end (delta: 130.0MB). Free memory was 66.4MB in the beginning and 159.8MB in the end (delta: -93.4MB). Peak memory consumption was 37.8MB. Max. memory is 16.1GB. [2021-12-22 13:50:04,379 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 104.9MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:50:04,379 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.32ms. Allocated memory is still 104.9MB. Free memory was 66.1MB in the beginning and 55.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 13:50:04,379 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.42ms. Allocated memory is still 104.9MB. Free memory was 55.7MB in the beginning and 54.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:50:04,379 INFO L158 Benchmark]: Boogie Preprocessor took 32.82ms. Allocated memory is still 104.9MB. Free memory was 54.2MB in the beginning and 53.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:50:04,379 INFO L158 Benchmark]: RCFGBuilder took 310.41ms. Allocated memory is still 104.9MB. Free memory was 53.1MB in the beginning and 75.1MB in the end (delta: -22.0MB). Peak memory consumption was 2.5MB. Max. memory is 16.1GB. [2021-12-22 13:50:04,380 INFO L158 Benchmark]: TraceAbstraction took 10329.60ms. Allocated memory was 104.9MB in the beginning and 234.9MB in the end (delta: 130.0MB). Free memory was 74.6MB in the beginning and 161.9MB in the end (delta: -87.3MB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. [2021-12-22 13:50:04,380 INFO L158 Benchmark]: Witness Printer took 34.07ms. Allocated memory is still 234.9MB. Free memory was 161.9MB in the beginning and 159.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:50:04,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 104.9MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 144.32ms. Allocated memory is still 104.9MB. Free memory was 66.1MB in the beginning and 55.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.42ms. Allocated memory is still 104.9MB. Free memory was 55.7MB in the beginning and 54.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.82ms. Allocated memory is still 104.9MB. Free memory was 54.2MB in the beginning and 53.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 310.41ms. Allocated memory is still 104.9MB. Free memory was 53.1MB in the beginning and 75.1MB in the end (delta: -22.0MB). Peak memory consumption was 2.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10329.60ms. Allocated memory was 104.9MB in the beginning and 234.9MB in the end (delta: 130.0MB). Free memory was 74.6MB in the beginning and 161.9MB in the end (delta: -87.3MB). Peak memory consumption was 45.9MB. Max. memory is 16.1GB. * Witness Printer took 34.07ms. Allocated memory is still 234.9MB. Free memory was 161.9MB in the beginning and 159.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 101 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.2s, OverallIterations: 38, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1856 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1856 mSDsluCounter, 4618 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5342 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4719 IncrementalHoareTripleChecker+Invalid, 4734 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 852 mSDtfsCounter, 4719 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 599 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=675occurred in iteration=23, InterpolantAutomatonStates: 375, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 2356 NumberOfCodeBlocks, 2356 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2318 ConstructedInterpolants, 0 QuantifiedInterpolants, 15060 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 38 InterpolantComputations, 38 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 13:50:04,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE