./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/fibonacci.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/fibonacci.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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:42:50,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:42:50,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:42:50,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:42:50,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:42:50,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:42:50,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:42:50,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:42:50,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:42:50,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:42:50,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:42:50,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:42:50,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:42:50,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:42:50,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:42:50,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:42:50,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:42:50,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:42:50,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:42:50,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:42:50,686 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:42:50,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:42:50,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:42:50,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:42:50,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:42:50,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:42:50,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:42:50,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:42:50,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:42:50,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:42:50,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:42:50,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:42:50,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:42:50,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:42:50,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:42:50,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:42:50,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:42:50,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:42:50,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:42:50,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:42:50,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:42:50,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:42:50,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:42:50,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:42:50,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:42:50,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:42:50,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:42:50,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:42:50,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:42:50,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:42:50,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:42:50,745 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:42:50,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:42:50,746 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:42:50,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:42:50,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:42:50,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:42:50,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:42:50,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:42:50,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:42:50,748 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:42:50,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:42:50,749 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:42:50,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:42:50,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:42:50,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:42:50,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:42:50,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:42:50,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:42:50,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:42:50,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:42:50,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:42:50,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:42:50,752 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:42:50,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:42:50,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:42:50,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e [2022-07-22 21:42:51,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:42:51,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:42:51,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:42:51,048 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:42:51,049 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:42:51,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-07-22 21:42:51,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7fcdb55e/b34c084e2d0545828210bd30dfaefc72/FLAG0823331b6 [2022-07-22 21:42:51,551 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:42:51,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-07-22 21:42:51,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7fcdb55e/b34c084e2d0545828210bd30dfaefc72/FLAG0823331b6 [2022-07-22 21:42:51,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7fcdb55e/b34c084e2d0545828210bd30dfaefc72 [2022-07-22 21:42:51,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:42:51,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:42:51,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:42:51,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:42:51,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:42:51,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e35cf0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51, skipping insertion in model container [2022-07-22 21:42:51,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:42:51,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:42:51,784 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/fibonacci.wvr.c[2330,2343] [2022-07-22 21:42:51,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:42:51,802 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:42:51,826 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/fibonacci.wvr.c[2330,2343] [2022-07-22 21:42:51,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:42:51,845 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:42:51,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51 WrapperNode [2022-07-22 21:42:51,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:42:51,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:42:51,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:42:51,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:42:51,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,888 INFO L137 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 170 [2022-07-22 21:42:51,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:42:51,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:42:51,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:42:51,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:42:51,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:42:51,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:42:51,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:42:51,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:42:51,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (1/1) ... [2022-07-22 21:42:51,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:42:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:42:51,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:42:52,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:42:52,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:42:52,029 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:42:52,030 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:42:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:42:52,030 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:42:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:42:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:42:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:42:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:42:52,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:42:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:42:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:42:52,032 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:42:52,106 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:42:52,108 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:42:52,419 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:42:52,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:42:52,440 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:42:52,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:42:52 BoogieIcfgContainer [2022-07-22 21:42:52,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:42:52,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:42:52,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:42:52,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:42:52,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:42:51" (1/3) ... [2022-07-22 21:42:52,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d08aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:42:52, skipping insertion in model container [2022-07-22 21:42:52,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:42:51" (2/3) ... [2022-07-22 21:42:52,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d08aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:42:52, skipping insertion in model container [2022-07-22 21:42:52,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:42:52" (3/3) ... [2022-07-22 21:42:52,454 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2022-07-22 21:42:52,459 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:42:52,467 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:42:52,468 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:42:52,468 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:42:52,604 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:42:52,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 221 places, 230 transitions, 476 flow [2022-07-22 21:42:52,743 INFO L129 PetriNetUnfolder]: 16/228 cut-off events. [2022-07-22 21:42:52,743 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:42:52,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 228 events. 16/228 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 382 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2022-07-22 21:42:52,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 230 transitions, 476 flow [2022-07-22 21:42:52,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 219 transitions, 450 flow [2022-07-22 21:42:52,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:42:52,798 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@347ba795, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@16e36030 [2022-07-22 21:42:52,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:42:52,841 INFO L129 PetriNetUnfolder]: 11/174 cut-off events. [2022-07-22 21:42:52,842 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:42:52,842 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:52,843 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:52,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:52,850 INFO L85 PathProgramCache]: Analyzing trace with hash 926680244, now seen corresponding path program 1 times [2022-07-22 21:42:52,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:52,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721652399] [2022-07-22 21:42:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:52,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:53,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:53,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721652399] [2022-07-22 21:42:53,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721652399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:53,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:53,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:42:53,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098727476] [2022-07-22 21:42:53,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:53,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:42:53,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:42:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:42:53,156 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 230 [2022-07-22 21:42:53,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 219 transitions, 450 flow. Second operand has 2 states, 2 states have (on average 216.0) internal successors, (432), 2 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:53,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 230 [2022-07-22 21:42:53,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:53,229 INFO L129 PetriNetUnfolder]: 4/207 cut-off events. [2022-07-22 21:42:53,229 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:42:53,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 207 events. 4/207 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 331 event pairs, 0 based on Foata normal form. 14/207 useless extension candidates. Maximal degree in co-relation 144. Up to 5 conditions per place. [2022-07-22 21:42:53,237 INFO L132 encePairwiseOnDemand]: 218/230 looper letters, 4 selfloop transitions, 0 changer transitions 2/207 dead transitions. [2022-07-22 21:42:53,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 207 transitions, 434 flow [2022-07-22 21:42:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:42:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:42:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 442 transitions. [2022-07-22 21:42:53,258 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9608695652173913 [2022-07-22 21:42:53,259 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 442 transitions. [2022-07-22 21:42:53,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 442 transitions. [2022-07-22 21:42:53,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:53,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 442 transitions. [2022-07-22 21:42:53,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 221.0) internal successors, (442), 2 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,288 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,290 INFO L186 Difference]: Start difference. First operand has 210 places, 219 transitions, 450 flow. Second operand 2 states and 442 transitions. [2022-07-22 21:42:53,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 207 transitions, 434 flow [2022-07-22 21:42:53,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 207 transitions, 426 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:42:53,302 INFO L242 Difference]: Finished difference. Result has 207 places, 205 transitions, 414 flow [2022-07-22 21:42:53,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=414, PETRI_PLACES=207, PETRI_TRANSITIONS=205} [2022-07-22 21:42:53,311 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, -3 predicate places. [2022-07-22 21:42:53,311 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 205 transitions, 414 flow [2022-07-22 21:42:53,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 216.0) internal successors, (432), 2 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:53,312 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:53,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:42:53,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash -584350222, now seen corresponding path program 1 times [2022-07-22 21:42:53,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:53,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522862022] [2022-07-22 21:42:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:53,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:53,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:53,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522862022] [2022-07-22 21:42:53,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522862022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:53,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:53,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:53,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325900479] [2022-07-22 21:42:53,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:53,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:53,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:53,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:53,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:53,503 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:53,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 205 transitions, 414 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:53,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:53,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:53,770 INFO L129 PetriNetUnfolder]: 44/341 cut-off events. [2022-07-22 21:42:53,777 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-22 21:42:53,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 341 events. 44/341 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1267 event pairs, 15 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 465. Up to 58 conditions per place. [2022-07-22 21:42:53,781 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 42 selfloop transitions, 3 changer transitions 16/242 dead transitions. [2022-07-22 21:42:53,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 242 transitions, 619 flow [2022-07-22 21:42:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:42:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:42:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2545 transitions. [2022-07-22 21:42:53,789 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8511705685618729 [2022-07-22 21:42:53,789 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2545 transitions. [2022-07-22 21:42:53,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2545 transitions. [2022-07-22 21:42:53,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:53,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2545 transitions. [2022-07-22 21:42:53,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 195.76923076923077) internal successors, (2545), 13 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,810 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,810 INFO L186 Difference]: Start difference. First operand has 207 places, 205 transitions, 414 flow. Second operand 13 states and 2545 transitions. [2022-07-22 21:42:53,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 242 transitions, 619 flow [2022-07-22 21:42:53,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 242 transitions, 619 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:42:53,825 INFO L242 Difference]: Finished difference. Result has 228 places, 207 transitions, 457 flow [2022-07-22 21:42:53,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=457, PETRI_PLACES=228, PETRI_TRANSITIONS=207} [2022-07-22 21:42:53,826 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 18 predicate places. [2022-07-22 21:42:53,827 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 207 transitions, 457 flow [2022-07-22 21:42:53,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:53,828 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:53,829 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:53,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:42:53,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:53,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash -16394332, now seen corresponding path program 2 times [2022-07-22 21:42:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283360531] [2022-07-22 21:42:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:53,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:53,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283360531] [2022-07-22 21:42:53,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283360531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:53,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:53,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:53,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913464087] [2022-07-22 21:42:53,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:53,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:53,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:53,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:53,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:54,000 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:54,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 207 transitions, 457 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:54,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:54,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:54,274 INFO L129 PetriNetUnfolder]: 55/420 cut-off events. [2022-07-22 21:42:54,274 INFO L130 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2022-07-22 21:42:54,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 420 events. 55/420 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1929 event pairs, 30 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 785. Up to 92 conditions per place. [2022-07-22 21:42:54,278 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 49 selfloop transitions, 3 changer transitions 15/248 dead transitions. [2022-07-22 21:42:54,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 248 transitions, 789 flow [2022-07-22 21:42:54,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:42:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:42:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2543 transitions. [2022-07-22 21:42:54,285 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8505016722408026 [2022-07-22 21:42:54,285 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2543 transitions. [2022-07-22 21:42:54,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2543 transitions. [2022-07-22 21:42:54,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:54,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2543 transitions. [2022-07-22 21:42:54,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 195.6153846153846) internal successors, (2543), 13 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,302 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,302 INFO L186 Difference]: Start difference. First operand has 228 places, 207 transitions, 457 flow. Second operand 13 states and 2543 transitions. [2022-07-22 21:42:54,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 248 transitions, 789 flow [2022-07-22 21:42:54,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 248 transitions, 747 flow, removed 19 selfloop flow, removed 7 redundant places. [2022-07-22 21:42:54,310 INFO L242 Difference]: Finished difference. Result has 236 places, 209 transitions, 491 flow [2022-07-22 21:42:54,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=491, PETRI_PLACES=236, PETRI_TRANSITIONS=209} [2022-07-22 21:42:54,311 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 26 predicate places. [2022-07-22 21:42:54,312 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 209 transitions, 491 flow [2022-07-22 21:42:54,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:54,313 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:54,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:42:54,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:54,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1238953426, now seen corresponding path program 1 times [2022-07-22 21:42:54,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:54,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015026351] [2022-07-22 21:42:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:54,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:54,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:54,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015026351] [2022-07-22 21:42:54,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015026351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:54,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:54,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:42:54,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135038331] [2022-07-22 21:42:54,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:54,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:42:54,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:54,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:42:54,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:42:54,401 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 230 [2022-07-22 21:42:54,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 209 transitions, 491 flow. Second operand has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:54,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 230 [2022-07-22 21:42:54,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:54,638 INFO L129 PetriNetUnfolder]: 122/1239 cut-off events. [2022-07-22 21:42:54,639 INFO L130 PetriNetUnfolder]: For 409/427 co-relation queries the response was YES. [2022-07-22 21:42:54,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 1239 events. 122/1239 cut-off events. For 409/427 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 8010 event pairs, 31 based on Foata normal form. 7/1117 useless extension candidates. Maximal degree in co-relation 1842. Up to 116 conditions per place. [2022-07-22 21:42:54,648 INFO L132 encePairwiseOnDemand]: 218/230 looper letters, 53 selfloop transitions, 14 changer transitions 0/250 dead transitions. [2022-07-22 21:42:54,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 250 transitions, 734 flow [2022-07-22 21:42:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:42:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:42:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1391 transitions. [2022-07-22 21:42:54,652 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8639751552795031 [2022-07-22 21:42:54,652 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1391 transitions. [2022-07-22 21:42:54,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1391 transitions. [2022-07-22 21:42:54,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:54,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1391 transitions. [2022-07-22 21:42:54,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.71428571428572) internal successors, (1391), 7 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,660 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,660 INFO L186 Difference]: Start difference. First operand has 236 places, 209 transitions, 491 flow. Second operand 7 states and 1391 transitions. [2022-07-22 21:42:54,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 250 transitions, 734 flow [2022-07-22 21:42:54,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 250 transitions, 703 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-07-22 21:42:54,669 INFO L242 Difference]: Finished difference. Result has 230 places, 217 transitions, 553 flow [2022-07-22 21:42:54,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=553, PETRI_PLACES=230, PETRI_TRANSITIONS=217} [2022-07-22 21:42:54,670 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 20 predicate places. [2022-07-22 21:42:54,671 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 217 transitions, 553 flow [2022-07-22 21:42:54,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,671 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:54,672 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:54,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:42:54,672 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1406417816, now seen corresponding path program 3 times [2022-07-22 21:42:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:54,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103170696] [2022-07-22 21:42:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:54,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:54,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103170696] [2022-07-22 21:42:54,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103170696] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:54,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:54,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:54,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453589677] [2022-07-22 21:42:54,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:54,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:54,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:54,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:54,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:54,779 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:54,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 217 transitions, 553 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:54,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:54,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:54,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:55,077 INFO L129 PetriNetUnfolder]: 155/1300 cut-off events. [2022-07-22 21:42:55,078 INFO L130 PetriNetUnfolder]: For 910/942 co-relation queries the response was YES. [2022-07-22 21:42:55,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 1300 events. 155/1300 cut-off events. For 910/942 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7579 event pairs, 73 based on Foata normal form. 6/1220 useless extension candidates. Maximal degree in co-relation 2431. Up to 277 conditions per place. [2022-07-22 21:42:55,091 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 34 selfloop transitions, 8 changer transitions 12/243 dead transitions. [2022-07-22 21:42:55,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 243 transitions, 820 flow [2022-07-22 21:42:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:42:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:42:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2343 transitions. [2022-07-22 21:42:55,098 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8489130434782609 [2022-07-22 21:42:55,098 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2343 transitions. [2022-07-22 21:42:55,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2343 transitions. [2022-07-22 21:42:55,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:55,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2343 transitions. [2022-07-22 21:42:55,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.25) internal successors, (2343), 12 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,111 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,112 INFO L186 Difference]: Start difference. First operand has 230 places, 217 transitions, 553 flow. Second operand 12 states and 2343 transitions. [2022-07-22 21:42:55,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 243 transitions, 820 flow [2022-07-22 21:42:55,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 243 transitions, 816 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:42:55,123 INFO L242 Difference]: Finished difference. Result has 246 places, 224 transitions, 652 flow [2022-07-22 21:42:55,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=652, PETRI_PLACES=246, PETRI_TRANSITIONS=224} [2022-07-22 21:42:55,126 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 36 predicate places. [2022-07-22 21:42:55,126 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 224 transitions, 652 flow [2022-07-22 21:42:55,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,127 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:55,127 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:55,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:42:55,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1954405362, now seen corresponding path program 4 times [2022-07-22 21:42:55,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:55,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853290555] [2022-07-22 21:42:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:55,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:55,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:55,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853290555] [2022-07-22 21:42:55,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853290555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:55,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:55,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:55,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582638630] [2022-07-22 21:42:55,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:55,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:55,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:55,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:55,259 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:55,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 224 transitions, 652 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:55,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:55,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:55,542 INFO L129 PetriNetUnfolder]: 145/1286 cut-off events. [2022-07-22 21:42:55,543 INFO L130 PetriNetUnfolder]: For 1485/1540 co-relation queries the response was YES. [2022-07-22 21:42:55,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 1286 events. 145/1286 cut-off events. For 1485/1540 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7565 event pairs, 79 based on Foata normal form. 10/1208 useless extension candidates. Maximal degree in co-relation 2587. Up to 277 conditions per place. [2022-07-22 21:42:55,556 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 32 selfloop transitions, 2 changer transitions 16/239 dead transitions. [2022-07-22 21:42:55,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 239 transitions, 858 flow [2022-07-22 21:42:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:42:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:42:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2148 transitions. [2022-07-22 21:42:55,562 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8490118577075099 [2022-07-22 21:42:55,562 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2148 transitions. [2022-07-22 21:42:55,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2148 transitions. [2022-07-22 21:42:55,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:55,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2148 transitions. [2022-07-22 21:42:55,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.27272727272728) internal successors, (2148), 11 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,576 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,576 INFO L186 Difference]: Start difference. First operand has 246 places, 224 transitions, 652 flow. Second operand 11 states and 2148 transitions. [2022-07-22 21:42:55,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 239 transitions, 858 flow [2022-07-22 21:42:55,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 239 transitions, 832 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-07-22 21:42:55,586 INFO L242 Difference]: Finished difference. Result has 252 places, 218 transitions, 589 flow [2022-07-22 21:42:55,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=589, PETRI_PLACES=252, PETRI_TRANSITIONS=218} [2022-07-22 21:42:55,589 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 42 predicate places. [2022-07-22 21:42:55,590 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 218 transitions, 589 flow [2022-07-22 21:42:55,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:55,591 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:55,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:42:55,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1105414098, now seen corresponding path program 2 times [2022-07-22 21:42:55,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:55,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65163892] [2022-07-22 21:42:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:55,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:55,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:55,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65163892] [2022-07-22 21:42:55,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65163892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:55,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:55,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:42:55,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343112459] [2022-07-22 21:42:55,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:55,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:42:55,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:55,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:42:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:42:55,689 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 230 [2022-07-22 21:42:55,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 218 transitions, 589 flow. Second operand has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:55,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 230 [2022-07-22 21:42:55,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:55,916 INFO L129 PetriNetUnfolder]: 121/1242 cut-off events. [2022-07-22 21:42:55,916 INFO L130 PetriNetUnfolder]: For 846/873 co-relation queries the response was YES. [2022-07-22 21:42:55,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2114 conditions, 1242 events. 121/1242 cut-off events. For 846/873 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 8036 event pairs, 28 based on Foata normal form. 9/1161 useless extension candidates. Maximal degree in co-relation 2086. Up to 128 conditions per place. [2022-07-22 21:42:55,928 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 57 selfloop transitions, 14 changer transitions 0/255 dead transitions. [2022-07-22 21:42:55,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 255 transitions, 858 flow [2022-07-22 21:42:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:42:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:42:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1390 transitions. [2022-07-22 21:42:55,932 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8633540372670807 [2022-07-22 21:42:55,932 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1390 transitions. [2022-07-22 21:42:55,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1390 transitions. [2022-07-22 21:42:55,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:55,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1390 transitions. [2022-07-22 21:42:55,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,970 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,970 INFO L186 Difference]: Start difference. First operand has 252 places, 218 transitions, 589 flow. Second operand 7 states and 1390 transitions. [2022-07-22 21:42:55,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 255 transitions, 858 flow [2022-07-22 21:42:55,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 255 transitions, 820 flow, removed 17 selfloop flow, removed 10 redundant places. [2022-07-22 21:42:55,978 INFO L242 Difference]: Finished difference. Result has 240 places, 224 transitions, 648 flow [2022-07-22 21:42:55,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=648, PETRI_PLACES=240, PETRI_TRANSITIONS=224} [2022-07-22 21:42:55,979 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 30 predicate places. [2022-07-22 21:42:55,980 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 224 transitions, 648 flow [2022-07-22 21:42:55,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:55,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:55,981 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:55,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:42:55,981 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:55,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:55,982 INFO L85 PathProgramCache]: Analyzing trace with hash 815955232, now seen corresponding path program 5 times [2022-07-22 21:42:55,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:55,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597282180] [2022-07-22 21:42:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:55,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:56,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:56,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597282180] [2022-07-22 21:42:56,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597282180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:56,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:56,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:56,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070296818] [2022-07-22 21:42:56,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:56,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:56,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:56,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:56,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 224 transitions, 648 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:56,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:56,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:56,346 INFO L129 PetriNetUnfolder]: 132/1310 cut-off events. [2022-07-22 21:42:56,346 INFO L130 PetriNetUnfolder]: For 1031/1066 co-relation queries the response was YES. [2022-07-22 21:42:56,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 1310 events. 132/1310 cut-off events. For 1031/1066 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 8081 event pairs, 60 based on Foata normal form. 2/1232 useless extension candidates. Maximal degree in co-relation 2399. Up to 230 conditions per place. [2022-07-22 21:42:56,358 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 32 selfloop transitions, 8 changer transitions 12/247 dead transitions. [2022-07-22 21:42:56,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 247 transitions, 903 flow [2022-07-22 21:42:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:42:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:42:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2152 transitions. [2022-07-22 21:42:56,365 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.850592885375494 [2022-07-22 21:42:56,365 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2152 transitions. [2022-07-22 21:42:56,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2152 transitions. [2022-07-22 21:42:56,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:56,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2152 transitions. [2022-07-22 21:42:56,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.63636363636363) internal successors, (2152), 11 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,385 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,385 INFO L186 Difference]: Start difference. First operand has 240 places, 224 transitions, 648 flow. Second operand 11 states and 2152 transitions. [2022-07-22 21:42:56,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 247 transitions, 903 flow [2022-07-22 21:42:56,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 247 transitions, 897 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-22 21:42:56,395 INFO L242 Difference]: Finished difference. Result has 256 places, 229 transitions, 737 flow [2022-07-22 21:42:56,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=737, PETRI_PLACES=256, PETRI_TRANSITIONS=229} [2022-07-22 21:42:56,398 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 46 predicate places. [2022-07-22 21:42:56,398 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 229 transitions, 737 flow [2022-07-22 21:42:56,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,399 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:56,399 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:56,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:42:56,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1297533230, now seen corresponding path program 1 times [2022-07-22 21:42:56,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:56,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224319336] [2022-07-22 21:42:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:56,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224319336] [2022-07-22 21:42:56,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224319336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:56,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:56,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:42:56,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6866073] [2022-07-22 21:42:56,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:56,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:42:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:56,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:42:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:42:56,476 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 230 [2022-07-22 21:42:56,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 229 transitions, 737 flow. Second operand has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:56,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 230 [2022-07-22 21:42:56,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:56,730 INFO L129 PetriNetUnfolder]: 124/1277 cut-off events. [2022-07-22 21:42:56,730 INFO L130 PetriNetUnfolder]: For 1325/1372 co-relation queries the response was YES. [2022-07-22 21:42:56,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 1277 events. 124/1277 cut-off events. For 1325/1372 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8431 event pairs, 31 based on Foata normal form. 9/1196 useless extension candidates. Maximal degree in co-relation 2369. Up to 123 conditions per place. [2022-07-22 21:42:56,741 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 59 selfloop transitions, 13 changer transitions 0/261 dead transitions. [2022-07-22 21:42:56,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 261 transitions, 989 flow [2022-07-22 21:42:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:42:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:42:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1390 transitions. [2022-07-22 21:42:56,744 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8633540372670807 [2022-07-22 21:42:56,744 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1390 transitions. [2022-07-22 21:42:56,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1390 transitions. [2022-07-22 21:42:56,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:56,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1390 transitions. [2022-07-22 21:42:56,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,751 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,751 INFO L186 Difference]: Start difference. First operand has 256 places, 229 transitions, 737 flow. Second operand 7 states and 1390 transitions. [2022-07-22 21:42:56,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 261 transitions, 989 flow [2022-07-22 21:42:56,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 261 transitions, 938 flow, removed 23 selfloop flow, removed 5 redundant places. [2022-07-22 21:42:56,763 INFO L242 Difference]: Finished difference. Result has 255 places, 231 transitions, 761 flow [2022-07-22 21:42:56,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=761, PETRI_PLACES=255, PETRI_TRANSITIONS=231} [2022-07-22 21:42:56,764 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 45 predicate places. [2022-07-22 21:42:56,764 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 231 transitions, 761 flow [2022-07-22 21:42:56,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,765 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:56,765 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:56,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:42:56,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:56,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash 344522756, now seen corresponding path program 2 times [2022-07-22 21:42:56,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:56,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767694089] [2022-07-22 21:42:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:56,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:56,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:56,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767694089] [2022-07-22 21:42:56,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767694089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:56,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:56,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:42:56,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091346011] [2022-07-22 21:42:56,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:56,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:42:56,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:56,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:42:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:42:56,851 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 230 [2022-07-22 21:42:56,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 231 transitions, 761 flow. Second operand has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:56,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:56,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 230 [2022-07-22 21:42:56,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:57,118 INFO L129 PetriNetUnfolder]: 121/1266 cut-off events. [2022-07-22 21:42:57,118 INFO L130 PetriNetUnfolder]: For 1305/1333 co-relation queries the response was YES. [2022-07-22 21:42:57,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 1266 events. 121/1266 cut-off events. For 1305/1333 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8347 event pairs, 29 based on Foata normal form. 5/1179 useless extension candidates. Maximal degree in co-relation 2264. Up to 135 conditions per place. [2022-07-22 21:42:57,145 INFO L132 encePairwiseOnDemand]: 219/230 looper letters, 56 selfloop transitions, 16 changer transitions 0/261 dead transitions. [2022-07-22 21:42:57,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 261 transitions, 992 flow [2022-07-22 21:42:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:42:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:42:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1389 transitions. [2022-07-22 21:42:57,149 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8627329192546583 [2022-07-22 21:42:57,150 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1389 transitions. [2022-07-22 21:42:57,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1389 transitions. [2022-07-22 21:42:57,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:57,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1389 transitions. [2022-07-22 21:42:57,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.42857142857142) internal successors, (1389), 7 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,157 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,157 INFO L186 Difference]: Start difference. First operand has 255 places, 231 transitions, 761 flow. Second operand 7 states and 1389 transitions. [2022-07-22 21:42:57,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 261 transitions, 992 flow [2022-07-22 21:42:57,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 261 transitions, 969 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-22 21:42:57,169 INFO L242 Difference]: Finished difference. Result has 259 places, 233 transitions, 813 flow [2022-07-22 21:42:57,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=813, PETRI_PLACES=259, PETRI_TRANSITIONS=233} [2022-07-22 21:42:57,170 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 49 predicate places. [2022-07-22 21:42:57,171 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 233 transitions, 813 flow [2022-07-22 21:42:57,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:57,172 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:57,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:42:57,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2001444932, now seen corresponding path program 1 times [2022-07-22 21:42:57,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:57,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545161459] [2022-07-22 21:42:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:57,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:57,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:57,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545161459] [2022-07-22 21:42:57,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545161459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:57,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:57,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:57,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607802156] [2022-07-22 21:42:57,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:57,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:57,277 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:57,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 233 transitions, 813 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:57,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:57,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:57,561 INFO L129 PetriNetUnfolder]: 128/1303 cut-off events. [2022-07-22 21:42:57,561 INFO L130 PetriNetUnfolder]: For 1489/1531 co-relation queries the response was YES. [2022-07-22 21:42:57,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2559 conditions, 1303 events. 128/1303 cut-off events. For 1489/1531 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 8216 event pairs, 30 based on Foata normal form. 2/1231 useless extension candidates. Maximal degree in co-relation 2527. Up to 159 conditions per place. [2022-07-22 21:42:57,576 INFO L132 encePairwiseOnDemand]: 218/230 looper letters, 53 selfloop transitions, 6 changer transitions 16/274 dead transitions. [2022-07-22 21:42:57,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 274 transitions, 1216 flow [2022-07-22 21:42:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:42:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:42:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2545 transitions. [2022-07-22 21:42:57,582 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8511705685618729 [2022-07-22 21:42:57,582 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2545 transitions. [2022-07-22 21:42:57,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2545 transitions. [2022-07-22 21:42:57,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:57,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2545 transitions. [2022-07-22 21:42:57,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 195.76923076923077) internal successors, (2545), 13 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,620 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,620 INFO L186 Difference]: Start difference. First operand has 259 places, 233 transitions, 813 flow. Second operand 13 states and 2545 transitions. [2022-07-22 21:42:57,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 274 transitions, 1216 flow [2022-07-22 21:42:57,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 274 transitions, 1205 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:42:57,631 INFO L242 Difference]: Finished difference. Result has 277 places, 233 transitions, 839 flow [2022-07-22 21:42:57,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=839, PETRI_PLACES=277, PETRI_TRANSITIONS=233} [2022-07-22 21:42:57,633 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 67 predicate places. [2022-07-22 21:42:57,633 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 233 transitions, 839 flow [2022-07-22 21:42:57,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:57,634 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:57,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:42:57,634 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1733805134, now seen corresponding path program 2 times [2022-07-22 21:42:57,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:57,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702222715] [2022-07-22 21:42:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:57,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:57,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:57,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702222715] [2022-07-22 21:42:57,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702222715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:57,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:57,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:57,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475142464] [2022-07-22 21:42:57,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:57,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:57,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:57,718 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:57,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 233 transitions, 839 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:57,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:57,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:57,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:58,011 INFO L129 PetriNetUnfolder]: 125/1268 cut-off events. [2022-07-22 21:42:58,012 INFO L130 PetriNetUnfolder]: For 2147/2191 co-relation queries the response was YES. [2022-07-22 21:42:58,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2829 conditions, 1268 events. 125/1268 cut-off events. For 2147/2191 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7810 event pairs, 52 based on Foata normal form. 2/1195 useless extension candidates. Maximal degree in co-relation 2787. Up to 243 conditions per place. [2022-07-22 21:42:58,024 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 39 selfloop transitions, 8 changer transitions 11/257 dead transitions. [2022-07-22 21:42:58,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 257 transitions, 1171 flow [2022-07-22 21:42:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:42:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:42:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2150 transitions. [2022-07-22 21:42:58,029 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.849802371541502 [2022-07-22 21:42:58,029 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2150 transitions. [2022-07-22 21:42:58,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2150 transitions. [2022-07-22 21:42:58,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:58,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2150 transitions. [2022-07-22 21:42:58,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.45454545454547) internal successors, (2150), 11 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,038 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,038 INFO L186 Difference]: Start difference. First operand has 277 places, 233 transitions, 839 flow. Second operand 11 states and 2150 transitions. [2022-07-22 21:42:58,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 257 transitions, 1171 flow [2022-07-22 21:42:58,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 257 transitions, 1079 flow, removed 25 selfloop flow, removed 13 redundant places. [2022-07-22 21:42:58,051 INFO L242 Difference]: Finished difference. Result has 275 places, 239 transitions, 894 flow [2022-07-22 21:42:58,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=894, PETRI_PLACES=275, PETRI_TRANSITIONS=239} [2022-07-22 21:42:58,052 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 65 predicate places. [2022-07-22 21:42:58,052 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 239 transitions, 894 flow [2022-07-22 21:42:58,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:58,053 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:58,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:42:58,053 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:58,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:58,054 INFO L85 PathProgramCache]: Analyzing trace with hash 978295640, now seen corresponding path program 3 times [2022-07-22 21:42:58,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:58,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770493431] [2022-07-22 21:42:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:58,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:58,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:58,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770493431] [2022-07-22 21:42:58,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770493431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:58,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:58,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:58,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490474279] [2022-07-22 21:42:58,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:58,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:58,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:58,124 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:58,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 239 transitions, 894 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:58,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:58,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:58,431 INFO L129 PetriNetUnfolder]: 127/1357 cut-off events. [2022-07-22 21:42:58,431 INFO L130 PetriNetUnfolder]: For 2108/2168 co-relation queries the response was YES. [2022-07-22 21:42:58,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 1357 events. 127/1357 cut-off events. For 2108/2168 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8638 event pairs, 46 based on Foata normal form. 2/1281 useless extension candidates. Maximal degree in co-relation 2891. Up to 243 conditions per place. [2022-07-22 21:42:58,447 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 43 selfloop transitions, 10 changer transitions 12/264 dead transitions. [2022-07-22 21:42:58,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 264 transitions, 1227 flow [2022-07-22 21:42:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:42:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:42:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2152 transitions. [2022-07-22 21:42:58,451 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.850592885375494 [2022-07-22 21:42:58,451 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2152 transitions. [2022-07-22 21:42:58,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2152 transitions. [2022-07-22 21:42:58,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:58,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2152 transitions. [2022-07-22 21:42:58,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.63636363636363) internal successors, (2152), 11 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,458 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,459 INFO L186 Difference]: Start difference. First operand has 275 places, 239 transitions, 894 flow. Second operand 11 states and 2152 transitions. [2022-07-22 21:42:58,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 264 transitions, 1227 flow [2022-07-22 21:42:58,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 264 transitions, 1164 flow, removed 27 selfloop flow, removed 5 redundant places. [2022-07-22 21:42:58,474 INFO L242 Difference]: Finished difference. Result has 283 places, 245 transitions, 959 flow [2022-07-22 21:42:58,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=959, PETRI_PLACES=283, PETRI_TRANSITIONS=245} [2022-07-22 21:42:58,476 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 73 predicate places. [2022-07-22 21:42:58,476 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 245 transitions, 959 flow [2022-07-22 21:42:58,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,476 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:58,477 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:58,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:42:58,477 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 54580004, now seen corresponding path program 4 times [2022-07-22 21:42:58,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:58,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985299695] [2022-07-22 21:42:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:58,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:58,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:58,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985299695] [2022-07-22 21:42:58,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985299695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:58,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:58,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:58,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578111298] [2022-07-22 21:42:58,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:58,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:58,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:58,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:58,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:58,546 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:58,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 245 transitions, 959 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:58,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:58,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:58,842 INFO L129 PetriNetUnfolder]: 123/1369 cut-off events. [2022-07-22 21:42:58,842 INFO L130 PetriNetUnfolder]: For 2546/2624 co-relation queries the response was YES. [2022-07-22 21:42:58,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 1369 events. 123/1369 cut-off events. For 2546/2624 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8830 event pairs, 36 based on Foata normal form. 6/1303 useless extension candidates. Maximal degree in co-relation 3019. Up to 175 conditions per place. [2022-07-22 21:42:58,858 INFO L132 encePairwiseOnDemand]: 219/230 looper letters, 55 selfloop transitions, 11 changer transitions 17/282 dead transitions. [2022-07-22 21:42:58,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 282 transitions, 1420 flow [2022-07-22 21:42:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:42:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:42:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2543 transitions. [2022-07-22 21:42:58,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8505016722408026 [2022-07-22 21:42:58,862 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2543 transitions. [2022-07-22 21:42:58,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2543 transitions. [2022-07-22 21:42:58,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:58,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2543 transitions. [2022-07-22 21:42:58,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 195.6153846153846) internal successors, (2543), 13 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,871 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,871 INFO L186 Difference]: Start difference. First operand has 283 places, 245 transitions, 959 flow. Second operand 13 states and 2543 transitions. [2022-07-22 21:42:58,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 282 transitions, 1420 flow [2022-07-22 21:42:58,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 282 transitions, 1296 flow, removed 57 selfloop flow, removed 5 redundant places. [2022-07-22 21:42:58,887 INFO L242 Difference]: Finished difference. Result has 294 places, 245 transitions, 956 flow [2022-07-22 21:42:58,888 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=956, PETRI_PLACES=294, PETRI_TRANSITIONS=245} [2022-07-22 21:42:58,889 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 84 predicate places. [2022-07-22 21:42:58,889 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 245 transitions, 956 flow [2022-07-22 21:42:58,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,889 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:58,890 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:58,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:42:58,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash 99211608, now seen corresponding path program 5 times [2022-07-22 21:42:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:58,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671343581] [2022-07-22 21:42:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:58,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671343581] [2022-07-22 21:42:58,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671343581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:58,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:58,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:58,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836630744] [2022-07-22 21:42:58,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:58,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:58,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:58,952 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:58,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 245 transitions, 956 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:58,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:58,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:58,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:59,243 INFO L129 PetriNetUnfolder]: 113/1356 cut-off events. [2022-07-22 21:42:59,243 INFO L130 PetriNetUnfolder]: For 2504/2578 co-relation queries the response was YES. [2022-07-22 21:42:59,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 1356 events. 113/1356 cut-off events. For 2504/2578 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 8707 event pairs, 44 based on Foata normal form. 10/1289 useless extension candidates. Maximal degree in co-relation 2901. Up to 231 conditions per place. [2022-07-22 21:42:59,261 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 41 selfloop transitions, 4 changer transitions 18/262 dead transitions. [2022-07-22 21:42:59,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 262 transitions, 1219 flow [2022-07-22 21:42:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:42:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:42:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2341 transitions. [2022-07-22 21:42:59,265 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8481884057971014 [2022-07-22 21:42:59,265 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2341 transitions. [2022-07-22 21:42:59,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2341 transitions. [2022-07-22 21:42:59,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:59,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2341 transitions. [2022-07-22 21:42:59,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,273 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,273 INFO L186 Difference]: Start difference. First operand has 294 places, 245 transitions, 956 flow. Second operand 12 states and 2341 transitions. [2022-07-22 21:42:59,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 262 transitions, 1219 flow [2022-07-22 21:42:59,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 262 transitions, 1140 flow, removed 16 selfloop flow, removed 12 redundant places. [2022-07-22 21:42:59,289 INFO L242 Difference]: Finished difference. Result has 291 places, 239 transitions, 882 flow [2022-07-22 21:42:59,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=882, PETRI_PLACES=291, PETRI_TRANSITIONS=239} [2022-07-22 21:42:59,290 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 81 predicate places. [2022-07-22 21:42:59,291 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 239 transitions, 882 flow [2022-07-22 21:42:59,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,291 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:59,292 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:59,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:42:59,292 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1404127444, now seen corresponding path program 6 times [2022-07-22 21:42:59,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:59,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992934624] [2022-07-22 21:42:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:59,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:59,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:59,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992934624] [2022-07-22 21:42:59,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992934624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:59,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:59,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:59,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949041015] [2022-07-22 21:42:59,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:59,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:59,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:59,354 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:59,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 239 transitions, 882 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:59,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:59,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:59,642 INFO L129 PetriNetUnfolder]: 105/1261 cut-off events. [2022-07-22 21:42:59,642 INFO L130 PetriNetUnfolder]: For 2078/2149 co-relation queries the response was YES. [2022-07-22 21:42:59,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 1261 events. 105/1261 cut-off events. For 2078/2149 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7824 event pairs, 44 based on Foata normal form. 4/1191 useless extension candidates. Maximal degree in co-relation 2568. Up to 207 conditions per place. [2022-07-22 21:42:59,653 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 36 selfloop transitions, 2 changer transitions 19/254 dead transitions. [2022-07-22 21:42:59,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 254 transitions, 1097 flow [2022-07-22 21:42:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:42:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:42:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2340 transitions. [2022-07-22 21:42:59,656 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8478260869565217 [2022-07-22 21:42:59,656 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2340 transitions. [2022-07-22 21:42:59,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2340 transitions. [2022-07-22 21:42:59,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:59,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2340 transitions. [2022-07-22 21:42:59,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,663 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,664 INFO L186 Difference]: Start difference. First operand has 291 places, 239 transitions, 882 flow. Second operand 12 states and 2340 transitions. [2022-07-22 21:42:59,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 254 transitions, 1097 flow [2022-07-22 21:42:59,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 254 transitions, 1035 flow, removed 18 selfloop flow, removed 13 redundant places. [2022-07-22 21:42:59,675 INFO L242 Difference]: Finished difference. Result has 283 places, 231 transitions, 807 flow [2022-07-22 21:42:59,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=807, PETRI_PLACES=283, PETRI_TRANSITIONS=231} [2022-07-22 21:42:59,676 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 73 predicate places. [2022-07-22 21:42:59,676 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 231 transitions, 807 flow [2022-07-22 21:42:59,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,677 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:59,677 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:59,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:42:59,677 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:59,678 INFO L85 PathProgramCache]: Analyzing trace with hash 595118248, now seen corresponding path program 6 times [2022-07-22 21:42:59,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:59,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614827746] [2022-07-22 21:42:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:59,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:59,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:59,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614827746] [2022-07-22 21:42:59,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614827746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:59,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:59,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:42:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733051598] [2022-07-22 21:42:59,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:42:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:42:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:42:59,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-22 21:42:59,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 231 transitions, 807 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:59,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:59,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-22 21:42:59,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:59,977 INFO L129 PetriNetUnfolder]: 98/1174 cut-off events. [2022-07-22 21:42:59,977 INFO L130 PetriNetUnfolder]: For 1494/1545 co-relation queries the response was YES. [2022-07-22 21:42:59,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2292 conditions, 1174 events. 98/1174 cut-off events. For 1494/1545 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 7003 event pairs, 44 based on Foata normal form. 4/1104 useless extension candidates. Maximal degree in co-relation 2247. Up to 164 conditions per place. [2022-07-22 21:42:59,989 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 30 selfloop transitions, 2 changer transitions 19/246 dead transitions. [2022-07-22 21:42:59,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 246 transitions, 997 flow [2022-07-22 21:42:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:42:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:42:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2340 transitions. [2022-07-22 21:42:59,994 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8478260869565217 [2022-07-22 21:42:59,994 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2340 transitions. [2022-07-22 21:42:59,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2340 transitions. [2022-07-22 21:42:59,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:59,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2340 transitions. [2022-07-22 21:42:59,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,003 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,003 INFO L186 Difference]: Start difference. First operand has 283 places, 231 transitions, 807 flow. Second operand 12 states and 2340 transitions. [2022-07-22 21:43:00,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 246 transitions, 997 flow [2022-07-22 21:43:00,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 246 transitions, 947 flow, removed 16 selfloop flow, removed 14 redundant places. [2022-07-22 21:43:00,014 INFO L242 Difference]: Finished difference. Result has 274 places, 223 transitions, 724 flow [2022-07-22 21:43:00,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=724, PETRI_PLACES=274, PETRI_TRANSITIONS=223} [2022-07-22 21:43:00,015 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 64 predicate places. [2022-07-22 21:43:00,016 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 223 transitions, 724 flow [2022-07-22 21:43:00,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,016 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:00,016 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:00,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:43:00,017 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash 327908216, now seen corresponding path program 1 times [2022-07-22 21:43:00,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:00,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082189874] [2022-07-22 21:43:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:00,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:00,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:00,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082189874] [2022-07-22 21:43:00,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082189874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:00,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:00,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:43:00,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549908302] [2022-07-22 21:43:00,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:00,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:43:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:43:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:43:00,073 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-22 21:43:00,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 223 transitions, 724 flow. Second operand has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:00,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-22 21:43:00,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:00,373 INFO L129 PetriNetUnfolder]: 139/2099 cut-off events. [2022-07-22 21:43:00,374 INFO L130 PetriNetUnfolder]: For 1573/1600 co-relation queries the response was YES. [2022-07-22 21:43:00,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3390 conditions, 2099 events. 139/2099 cut-off events. For 1573/1600 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 15067 event pairs, 57 based on Foata normal form. 1/1932 useless extension candidates. Maximal degree in co-relation 3349. Up to 121 conditions per place. [2022-07-22 21:43:00,399 INFO L132 encePairwiseOnDemand]: 223/230 looper letters, 27 selfloop transitions, 5 changer transitions 3/242 dead transitions. [2022-07-22 21:43:00,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 242 transitions, 836 flow [2022-07-22 21:43:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:43:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:43:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1242 transitions. [2022-07-22 21:43:00,402 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-22 21:43:00,402 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1242 transitions. [2022-07-22 21:43:00,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1242 transitions. [2022-07-22 21:43:00,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:00,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1242 transitions. [2022-07-22 21:43:00,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,406 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,406 INFO L186 Difference]: Start difference. First operand has 274 places, 223 transitions, 724 flow. Second operand 6 states and 1242 transitions. [2022-07-22 21:43:00,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 242 transitions, 836 flow [2022-07-22 21:43:00,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 242 transitions, 795 flow, removed 10 selfloop flow, removed 14 redundant places. [2022-07-22 21:43:00,420 INFO L242 Difference]: Finished difference. Result has 256 places, 225 transitions, 709 flow [2022-07-22 21:43:00,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=709, PETRI_PLACES=256, PETRI_TRANSITIONS=225} [2022-07-22 21:43:00,421 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 46 predicate places. [2022-07-22 21:43:00,421 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 225 transitions, 709 flow [2022-07-22 21:43:00,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,422 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:00,422 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:00,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:43:00,422 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:00,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:00,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1398640822, now seen corresponding path program 2 times [2022-07-22 21:43:00,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:00,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64730707] [2022-07-22 21:43:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:00,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:00,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:00,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64730707] [2022-07-22 21:43:00,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64730707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:00,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310972214] [2022-07-22 21:43:00,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:43:00,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:00,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:00,495 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:00,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:43:00,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:43:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:43:00,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:00,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:00,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310972214] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:00,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:00,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-22 21:43:00,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435714486] [2022-07-22 21:43:00,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:00,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:43:00,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:43:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:43:00,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-22 21:43:00,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 225 transitions, 709 flow. Second operand has 9 states, 9 states have (on average 203.44444444444446) internal successors, (1831), 9 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:00,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:00,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-22 21:43:00,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:01,456 INFO L129 PetriNetUnfolder]: 204/3253 cut-off events. [2022-07-22 21:43:01,457 INFO L130 PetriNetUnfolder]: For 1596/1641 co-relation queries the response was YES. [2022-07-22 21:43:01,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4900 conditions, 3253 events. 204/3253 cut-off events. For 1596/1641 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 25693 event pairs, 57 based on Foata normal form. 9/3062 useless extension candidates. Maximal degree in co-relation 4866. Up to 86 conditions per place. [2022-07-22 21:43:01,484 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 51 selfloop transitions, 31 changer transitions 1/290 dead transitions. [2022-07-22 21:43:01,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 290 transitions, 1089 flow [2022-07-22 21:43:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:43:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:43:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2890 transitions. [2022-07-22 21:43:01,487 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8975155279503105 [2022-07-22 21:43:01,487 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2890 transitions. [2022-07-22 21:43:01,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2890 transitions. [2022-07-22 21:43:01,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:01,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2890 transitions. [2022-07-22 21:43:01,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 206.42857142857142) internal successors, (2890), 14 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 230.0) internal successors, (3450), 15 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,496 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 230.0) internal successors, (3450), 15 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,496 INFO L186 Difference]: Start difference. First operand has 256 places, 225 transitions, 709 flow. Second operand 14 states and 2890 transitions. [2022-07-22 21:43:01,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 290 transitions, 1089 flow [2022-07-22 21:43:01,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 290 transitions, 1062 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-07-22 21:43:01,510 INFO L242 Difference]: Finished difference. Result has 272 places, 257 transitions, 921 flow [2022-07-22 21:43:01,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=921, PETRI_PLACES=272, PETRI_TRANSITIONS=257} [2022-07-22 21:43:01,511 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 62 predicate places. [2022-07-22 21:43:01,511 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 257 transitions, 921 flow [2022-07-22 21:43:01,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 203.44444444444446) internal successors, (1831), 9 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,512 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:01,512 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:01,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:01,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:01,732 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash -943829332, now seen corresponding path program 3 times [2022-07-22 21:43:01,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:01,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680140192] [2022-07-22 21:43:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:01,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:01,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:01,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680140192] [2022-07-22 21:43:01,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680140192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:01,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:01,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:43:01,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066000850] [2022-07-22 21:43:01,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:01,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:43:01,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:43:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:43:01,785 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-22 21:43:01,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 257 transitions, 921 flow. Second operand has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:01,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-22 21:43:01,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:02,302 INFO L129 PetriNetUnfolder]: 243/3590 cut-off events. [2022-07-22 21:43:02,303 INFO L130 PetriNetUnfolder]: For 2357/2404 co-relation queries the response was YES. [2022-07-22 21:43:02,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5802 conditions, 3590 events. 243/3590 cut-off events. For 2357/2404 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 28823 event pairs, 96 based on Foata normal form. 8/3368 useless extension candidates. Maximal degree in co-relation 5762. Up to 205 conditions per place. [2022-07-22 21:43:02,403 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 61 selfloop transitions, 18 changer transitions 6/292 dead transitions. [2022-07-22 21:43:02,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 292 transitions, 1279 flow [2022-07-22 21:43:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:43:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:43:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1257 transitions. [2022-07-22 21:43:02,405 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9108695652173913 [2022-07-22 21:43:02,406 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1257 transitions. [2022-07-22 21:43:02,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1257 transitions. [2022-07-22 21:43:02,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:02,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1257 transitions. [2022-07-22 21:43:02,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.5) internal successors, (1257), 6 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:02,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:02,410 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:02,410 INFO L186 Difference]: Start difference. First operand has 272 places, 257 transitions, 921 flow. Second operand 6 states and 1257 transitions. [2022-07-22 21:43:02,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 292 transitions, 1279 flow [2022-07-22 21:43:02,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 292 transitions, 1277 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:43:02,434 INFO L242 Difference]: Finished difference. Result has 279 places, 265 transitions, 1036 flow [2022-07-22 21:43:02,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=279, PETRI_TRANSITIONS=265} [2022-07-22 21:43:02,435 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 69 predicate places. [2022-07-22 21:43:02,435 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 265 transitions, 1036 flow [2022-07-22 21:43:02,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:02,436 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:02,436 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:02,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:43:02,436 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:02,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:02,437 INFO L85 PathProgramCache]: Analyzing trace with hash -737684930, now seen corresponding path program 4 times [2022-07-22 21:43:02,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:02,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92845516] [2022-07-22 21:43:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:02,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:02,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92845516] [2022-07-22 21:43:02,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92845516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773451071] [2022-07-22 21:43:02,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:43:02,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:02,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:02,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:02,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:43:02,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:43:02,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:43:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:02,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:02,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773451071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:02,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:02,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-22 21:43:02,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532714425] [2022-07-22 21:43:02,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:02,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:43:02,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:43:02,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:43:02,901 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-22 21:43:02,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 265 transitions, 1036 flow. Second operand has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:02,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:02,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-22 21:43:02,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:03,660 INFO L129 PetriNetUnfolder]: 269/4115 cut-off events. [2022-07-22 21:43:03,660 INFO L130 PetriNetUnfolder]: For 3063/3121 co-relation queries the response was YES. [2022-07-22 21:43:03,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6730 conditions, 4115 events. 269/4115 cut-off events. For 3063/3121 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 35286 event pairs, 103 based on Foata normal form. 12/3858 useless extension candidates. Maximal degree in co-relation 6687. Up to 147 conditions per place. [2022-07-22 21:43:03,698 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 59 selfloop transitions, 50 changer transitions 0/316 dead transitions. [2022-07-22 21:43:03,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 316 transitions, 1519 flow [2022-07-22 21:43:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:43:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:43:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1873 transitions. [2022-07-22 21:43:03,701 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9048309178743962 [2022-07-22 21:43:03,701 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1873 transitions. [2022-07-22 21:43:03,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1873 transitions. [2022-07-22 21:43:03,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:03,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1873 transitions. [2022-07-22 21:43:03,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.11111111111111) internal successors, (1873), 9 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:03,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:03,707 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:03,707 INFO L186 Difference]: Start difference. First operand has 279 places, 265 transitions, 1036 flow. Second operand 9 states and 1873 transitions. [2022-07-22 21:43:03,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 316 transitions, 1519 flow [2022-07-22 21:43:03,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 316 transitions, 1502 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-22 21:43:03,730 INFO L242 Difference]: Finished difference. Result has 291 places, 286 transitions, 1327 flow [2022-07-22 21:43:03,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1327, PETRI_PLACES=291, PETRI_TRANSITIONS=286} [2022-07-22 21:43:03,731 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 81 predicate places. [2022-07-22 21:43:03,731 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 286 transitions, 1327 flow [2022-07-22 21:43:03,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:03,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:03,732 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:03,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:03,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-22 21:43:03,950 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 791573158, now seen corresponding path program 1 times [2022-07-22 21:43:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:03,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460839618] [2022-07-22 21:43:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:03,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:04,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:04,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460839618] [2022-07-22 21:43:04,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460839618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:04,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150008650] [2022-07-22 21:43:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:04,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:04,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:04,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:04,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:43:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:04,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:43:04,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:04,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:04,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150008650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:04,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:04,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-22 21:43:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434308794] [2022-07-22 21:43:04,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:04,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:43:04,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:43:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:43:04,297 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-22 21:43:04,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 286 transitions, 1327 flow. Second operand has 9 states, 9 states have (on average 203.22222222222223) internal successors, (1829), 9 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:04,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:04,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-22 21:43:04,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:05,147 INFO L129 PetriNetUnfolder]: 297/4716 cut-off events. [2022-07-22 21:43:05,148 INFO L130 PetriNetUnfolder]: For 4113/4168 co-relation queries the response was YES. [2022-07-22 21:43:05,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7974 conditions, 4716 events. 297/4716 cut-off events. For 4113/4168 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 42499 event pairs, 91 based on Foata normal form. 6/4416 useless extension candidates. Maximal degree in co-relation 7926. Up to 125 conditions per place. [2022-07-22 21:43:05,182 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 67 selfloop transitions, 77 changer transitions 2/353 dead transitions. [2022-07-22 21:43:05,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 353 transitions, 2070 flow [2022-07-22 21:43:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:43:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:43:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2886 transitions. [2022-07-22 21:43:05,185 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8962732919254658 [2022-07-22 21:43:05,186 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2886 transitions. [2022-07-22 21:43:05,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2886 transitions. [2022-07-22 21:43:05,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:05,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2886 transitions. [2022-07-22 21:43:05,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 206.14285714285714) internal successors, (2886), 14 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:05,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 230.0) internal successors, (3450), 15 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:05,194 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 230.0) internal successors, (3450), 15 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:05,194 INFO L186 Difference]: Start difference. First operand has 291 places, 286 transitions, 1327 flow. Second operand 14 states and 2886 transitions. [2022-07-22 21:43:05,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 353 transitions, 2070 flow [2022-07-22 21:43:05,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 353 transitions, 2034 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-07-22 21:43:05,221 INFO L242 Difference]: Finished difference. Result has 308 places, 320 transitions, 1808 flow [2022-07-22 21:43:05,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1808, PETRI_PLACES=308, PETRI_TRANSITIONS=320} [2022-07-22 21:43:05,222 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 98 predicate places. [2022-07-22 21:43:05,222 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 320 transitions, 1808 flow [2022-07-22 21:43:05,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 203.22222222222223) internal successors, (1829), 9 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:05,223 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:05,223 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:05,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 21:43:05,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:05,439 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash 292599124, now seen corresponding path program 5 times [2022-07-22 21:43:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:05,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040224441] [2022-07-22 21:43:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:05,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:05,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040224441] [2022-07-22 21:43:05,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040224441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:05,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377809692] [2022-07-22 21:43:05,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:43:05,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:05,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:05,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:05,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:43:05,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:43:05,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:43:05,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:05,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:05,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377809692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:05,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:05,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-22 21:43:05,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412369538] [2022-07-22 21:43:05,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:05,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:43:05,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:43:05,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:43:05,836 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-22 21:43:05,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 320 transitions, 1808 flow. Second operand has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:05,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:05,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-22 21:43:05,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:07,032 INFO L129 PetriNetUnfolder]: 313/5434 cut-off events. [2022-07-22 21:43:07,032 INFO L130 PetriNetUnfolder]: For 4844/4897 co-relation queries the response was YES. [2022-07-22 21:43:07,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8935 conditions, 5434 events. 313/5434 cut-off events. For 4844/4897 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 50757 event pairs, 90 based on Foata normal form. 11/5081 useless extension candidates. Maximal degree in co-relation 8882. Up to 135 conditions per place. [2022-07-22 21:43:07,072 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 77 selfloop transitions, 78 changer transitions 2/364 dead transitions. [2022-07-22 21:43:07,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 364 transitions, 2375 flow [2022-07-22 21:43:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:43:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:43:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2691 transitions. [2022-07-22 21:43:07,075 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-22 21:43:07,075 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2691 transitions. [2022-07-22 21:43:07,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2691 transitions. [2022-07-22 21:43:07,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:07,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2691 transitions. [2022-07-22 21:43:07,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 207.0) internal successors, (2691), 13 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,084 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,084 INFO L186 Difference]: Start difference. First operand has 308 places, 320 transitions, 1808 flow. Second operand 13 states and 2691 transitions. [2022-07-22 21:43:07,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 364 transitions, 2375 flow [2022-07-22 21:43:07,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 364 transitions, 2240 flow, removed 43 selfloop flow, removed 2 redundant places. [2022-07-22 21:43:07,114 INFO L242 Difference]: Finished difference. Result has 320 places, 328 transitions, 1944 flow [2022-07-22 21:43:07,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1944, PETRI_PLACES=320, PETRI_TRANSITIONS=328} [2022-07-22 21:43:07,115 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 110 predicate places. [2022-07-22 21:43:07,115 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 328 transitions, 1944 flow [2022-07-22 21:43:07,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,116 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:07,116 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:07,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:07,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:07,323 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:07,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1917545100, now seen corresponding path program 2 times [2022-07-22 21:43:07,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:07,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089354618] [2022-07-22 21:43:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:07,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:07,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:07,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089354618] [2022-07-22 21:43:07,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089354618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341241679] [2022-07-22 21:43:07,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:43:07,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:07,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:07,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:07,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:43:07,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:43:07,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:07,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:43:07,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:07,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:07,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341241679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:07,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:07,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-22 21:43:07,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290524932] [2022-07-22 21:43:07,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:07,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:43:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:43:07,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:43:07,712 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-22 21:43:07,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 328 transitions, 1944 flow. Second operand has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:07,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-22 21:43:07,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:08,665 INFO L129 PetriNetUnfolder]: 314/5772 cut-off events. [2022-07-22 21:43:08,666 INFO L130 PetriNetUnfolder]: For 5293/5347 co-relation queries the response was YES. [2022-07-22 21:43:08,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9488 conditions, 5772 events. 314/5772 cut-off events. For 5293/5347 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 54834 event pairs, 144 based on Foata normal form. 5/5384 useless extension candidates. Maximal degree in co-relation 9434. Up to 277 conditions per place. [2022-07-22 21:43:08,722 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 96 selfloop transitions, 53 changer transitions 1/357 dead transitions. [2022-07-22 21:43:08,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 357 transitions, 2420 flow [2022-07-22 21:43:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:43:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:43:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1865 transitions. [2022-07-22 21:43:08,725 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9009661835748792 [2022-07-22 21:43:08,725 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1865 transitions. [2022-07-22 21:43:08,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1865 transitions. [2022-07-22 21:43:08,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:08,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1865 transitions. [2022-07-22 21:43:08,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.22222222222223) internal successors, (1865), 9 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:08,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:08,731 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:08,731 INFO L186 Difference]: Start difference. First operand has 320 places, 328 transitions, 1944 flow. Second operand 9 states and 1865 transitions. [2022-07-22 21:43:08,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 357 transitions, 2420 flow [2022-07-22 21:43:08,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 357 transitions, 2392 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-22 21:43:08,767 INFO L242 Difference]: Finished difference. Result has 327 places, 338 transitions, 2168 flow [2022-07-22 21:43:08,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2168, PETRI_PLACES=327, PETRI_TRANSITIONS=338} [2022-07-22 21:43:08,768 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 117 predicate places. [2022-07-22 21:43:08,768 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 338 transitions, 2168 flow [2022-07-22 21:43:08,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:08,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:08,769 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:08,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 21:43:08,976 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1082551282, now seen corresponding path program 3 times [2022-07-22 21:43:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:08,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242811128] [2022-07-22 21:43:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:08,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:09,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:09,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242811128] [2022-07-22 21:43:09,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242811128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:09,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:09,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:43:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114733866] [2022-07-22 21:43:09,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:09,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:43:09,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:43:09,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:43:09,026 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-22 21:43:09,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 338 transitions, 2168 flow. Second operand has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:09,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:09,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-22 21:43:09,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:09,812 INFO L129 PetriNetUnfolder]: 291/4843 cut-off events. [2022-07-22 21:43:09,812 INFO L130 PetriNetUnfolder]: For 5151/5193 co-relation queries the response was YES. [2022-07-22 21:43:09,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8278 conditions, 4843 events. 291/4843 cut-off events. For 5151/5193 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 44627 event pairs, 140 based on Foata normal form. 4/4504 useless extension candidates. Maximal degree in co-relation 8222. Up to 311 conditions per place. [2022-07-22 21:43:09,865 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 102 selfloop transitions, 34 changer transitions 10/345 dead transitions. [2022-07-22 21:43:09,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 345 transitions, 2504 flow [2022-07-22 21:43:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:43:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:43:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1245 transitions. [2022-07-22 21:43:09,867 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9021739130434783 [2022-07-22 21:43:09,867 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1245 transitions. [2022-07-22 21:43:09,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1245 transitions. [2022-07-22 21:43:09,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:09,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1245 transitions. [2022-07-22 21:43:09,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:09,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:09,872 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:09,872 INFO L186 Difference]: Start difference. First operand has 327 places, 338 transitions, 2168 flow. Second operand 6 states and 1245 transitions. [2022-07-22 21:43:09,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 345 transitions, 2504 flow [2022-07-22 21:43:09,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 345 transitions, 2377 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-07-22 21:43:09,915 INFO L242 Difference]: Finished difference. Result has 328 places, 329 transitions, 2017 flow [2022-07-22 21:43:09,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2017, PETRI_PLACES=328, PETRI_TRANSITIONS=329} [2022-07-22 21:43:09,916 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 118 predicate places. [2022-07-22 21:43:09,916 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 329 transitions, 2017 flow [2022-07-22 21:43:09,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:09,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:09,917 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:09,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 21:43:09,917 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash -914373658, now seen corresponding path program 4 times [2022-07-22 21:43:09,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:09,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624204753] [2022-07-22 21:43:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:09,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:09,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624204753] [2022-07-22 21:43:09,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624204753] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319351969] [2022-07-22 21:43:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:43:09,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:09,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:09,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:09,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:43:10,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:43:10,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:10,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:43:10,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:10,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:10,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319351969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:10,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:10,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-22 21:43:10,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120270258] [2022-07-22 21:43:10,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:10,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:43:10,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:43:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:43:10,312 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-22 21:43:10,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 329 transitions, 2017 flow. Second operand has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:10,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:10,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-22 21:43:10,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:11,337 INFO L129 PetriNetUnfolder]: 284/5083 cut-off events. [2022-07-22 21:43:11,337 INFO L130 PetriNetUnfolder]: For 4606/4648 co-relation queries the response was YES. [2022-07-22 21:43:11,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 5083 events. 284/5083 cut-off events. For 4606/4648 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 47734 event pairs, 105 based on Foata normal form. 4/4737 useless extension candidates. Maximal degree in co-relation 8286. Up to 170 conditions per place. [2022-07-22 21:43:11,396 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 78 selfloop transitions, 85 changer transitions 1/363 dead transitions. [2022-07-22 21:43:11,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 363 transitions, 2555 flow [2022-07-22 21:43:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:43:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:43:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2476 transitions. [2022-07-22 21:43:11,401 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8971014492753623 [2022-07-22 21:43:11,401 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2476 transitions. [2022-07-22 21:43:11,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2476 transitions. [2022-07-22 21:43:11,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:11,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2476 transitions. [2022-07-22 21:43:11,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 206.33333333333334) internal successors, (2476), 12 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:11,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:11,408 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:11,408 INFO L186 Difference]: Start difference. First operand has 328 places, 329 transitions, 2017 flow. Second operand 12 states and 2476 transitions. [2022-07-22 21:43:11,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 363 transitions, 2555 flow [2022-07-22 21:43:11,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 363 transitions, 2373 flow, removed 5 selfloop flow, removed 19 redundant places. [2022-07-22 21:43:11,440 INFO L242 Difference]: Finished difference. Result has 317 places, 339 transitions, 2119 flow [2022-07-22 21:43:11,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2119, PETRI_PLACES=317, PETRI_TRANSITIONS=339} [2022-07-22 21:43:11,441 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 107 predicate places. [2022-07-22 21:43:11,441 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 339 transitions, 2119 flow [2022-07-22 21:43:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:11,442 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:11,442 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:11,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 21:43:11,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 21:43:11,656 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1340311248, now seen corresponding path program 1 times [2022-07-22 21:43:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:11,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917983186] [2022-07-22 21:43:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:11,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:11,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:11,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917983186] [2022-07-22 21:43:11,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917983186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:11,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196167659] [2022-07-22 21:43:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:11,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:11,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:11,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:11,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:43:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 21:43:12,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:12,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:13,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196167659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:13,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:13,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-07-22 21:43:13,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006300850] [2022-07-22 21:43:13,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:13,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 21:43:13,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:13,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 21:43:13,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 21:43:13,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 230 [2022-07-22 21:43:13,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 339 transitions, 2119 flow. Second operand has 39 states, 39 states have (on average 165.53846153846155) internal successors, (6456), 39 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:13,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:13,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 230 [2022-07-22 21:43:13,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:24,193 INFO L129 PetriNetUnfolder]: 6477/37839 cut-off events. [2022-07-22 21:43:24,193 INFO L130 PetriNetUnfolder]: For 25955/26122 co-relation queries the response was YES. [2022-07-22 21:43:24,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67955 conditions, 37839 events. 6477/37839 cut-off events. For 25955/26122 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 513011 event pairs, 984 based on Foata normal form. 34/35817 useless extension candidates. Maximal degree in co-relation 67913. Up to 5697 conditions per place. [2022-07-22 21:43:24,671 INFO L132 encePairwiseOnDemand]: 199/230 looper letters, 580 selfloop transitions, 228 changer transitions 9/1098 dead transitions. [2022-07-22 21:43:24,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1098 transitions, 5738 flow [2022-07-22 21:43:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-07-22 21:43:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2022-07-22 21:43:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 21840 transitions. [2022-07-22 21:43:24,686 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7360970677451971 [2022-07-22 21:43:24,687 INFO L72 ComplementDD]: Start complementDD. Operand 129 states and 21840 transitions. [2022-07-22 21:43:24,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 21840 transitions. [2022-07-22 21:43:24,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:24,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 129 states and 21840 transitions. [2022-07-22 21:43:24,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 130 states, 129 states have (on average 169.30232558139534) internal successors, (21840), 129 states have internal predecessors, (21840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:24,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 130 states, 130 states have (on average 230.0) internal successors, (29900), 130 states have internal predecessors, (29900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:24,748 INFO L81 ComplementDD]: Finished complementDD. Result has 130 states, 130 states have (on average 230.0) internal successors, (29900), 130 states have internal predecessors, (29900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:24,749 INFO L186 Difference]: Start difference. First operand has 317 places, 339 transitions, 2119 flow. Second operand 129 states and 21840 transitions. [2022-07-22 21:43:24,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1098 transitions, 5738 flow [2022-07-22 21:43:25,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1098 transitions, 5607 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-07-22 21:43:25,082 INFO L242 Difference]: Finished difference. Result has 525 places, 578 transitions, 3837 flow [2022-07-22 21:43:25,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=129, PETRI_FLOW=3837, PETRI_PLACES=525, PETRI_TRANSITIONS=578} [2022-07-22 21:43:25,083 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 315 predicate places. [2022-07-22 21:43:25,083 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 578 transitions, 3837 flow [2022-07-22 21:43:25,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 165.53846153846155) internal successors, (6456), 39 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:25,084 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:25,084 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:25,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:25,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:25,305 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:25,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1059582534, now seen corresponding path program 2 times [2022-07-22 21:43:25,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:25,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437933214] [2022-07-22 21:43:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:25,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:25,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:25,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437933214] [2022-07-22 21:43:25,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437933214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:25,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790886421] [2022-07-22 21:43:25,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:43:25,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:25,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:25,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:25,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:43:25,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:43:25,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:25,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 21:43:25,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:25,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:26,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790886421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:26,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:26,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-07-22 21:43:26,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657343876] [2022-07-22 21:43:26,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:26,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 21:43:26,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:26,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 21:43:26,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 21:43:26,681 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 230 [2022-07-22 21:43:26,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 578 transitions, 3837 flow. Second operand has 39 states, 39 states have (on average 165.53846153846155) internal successors, (6456), 39 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:26,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:26,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 230 [2022-07-22 21:43:26,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:39,932 INFO L129 PetriNetUnfolder]: 7767/45287 cut-off events. [2022-07-22 21:43:39,933 INFO L130 PetriNetUnfolder]: For 265095/266001 co-relation queries the response was YES. [2022-07-22 21:43:40,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129585 conditions, 45287 events. 7767/45287 cut-off events. For 265095/266001 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 637527 event pairs, 2638 based on Foata normal form. 172/42669 useless extension candidates. Maximal degree in co-relation 129460. Up to 9436 conditions per place. [2022-07-22 21:43:40,865 INFO L132 encePairwiseOnDemand]: 201/230 looper letters, 523 selfloop transitions, 145 changer transitions 5/954 dead transitions. [2022-07-22 21:43:40,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 954 transitions, 7924 flow [2022-07-22 21:43:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 21:43:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-22 21:43:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 7735 transitions. [2022-07-22 21:43:40,873 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7473429951690821 [2022-07-22 21:43:40,873 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 7735 transitions. [2022-07-22 21:43:40,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 7735 transitions. [2022-07-22 21:43:40,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:40,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 7735 transitions. [2022-07-22 21:43:40,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 171.88888888888889) internal successors, (7735), 45 states have internal predecessors, (7735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:40,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 230.0) internal successors, (10580), 46 states have internal predecessors, (10580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:40,898 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 230.0) internal successors, (10580), 46 states have internal predecessors, (10580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:40,898 INFO L186 Difference]: Start difference. First operand has 525 places, 578 transitions, 3837 flow. Second operand 45 states and 7735 transitions. [2022-07-22 21:43:40,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 954 transitions, 7924 flow [2022-07-22 21:43:42,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 954 transitions, 7640 flow, removed 110 selfloop flow, removed 7 redundant places. [2022-07-22 21:43:42,576 INFO L242 Difference]: Finished difference. Result has 593 places, 678 transitions, 5017 flow [2022-07-22 21:43:42,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5017, PETRI_PLACES=593, PETRI_TRANSITIONS=678} [2022-07-22 21:43:42,577 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 383 predicate places. [2022-07-22 21:43:42,578 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 678 transitions, 5017 flow [2022-07-22 21:43:42,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 165.53846153846155) internal successors, (6456), 39 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:42,579 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:42,579 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:42,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 21:43:42,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 21:43:42,796 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash -600668230, now seen corresponding path program 3 times [2022-07-22 21:43:42,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:42,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670822824] [2022-07-22 21:43:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:42,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:43,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670822824] [2022-07-22 21:43:43,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670822824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486245293] [2022-07-22 21:43:43,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:43:43,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:43,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:43,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:43,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:43:43,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:43:43,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 21:43:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:43,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:44,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486245293] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:44,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:44,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2022-07-22 21:43:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672166033] [2022-07-22 21:43:44,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:44,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 21:43:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 21:43:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1516, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 21:43:44,182 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 230 [2022-07-22 21:43:44,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 678 transitions, 5017 flow. Second operand has 41 states, 41 states have (on average 165.5121951219512) internal successors, (6786), 41 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:44,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:44,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 230 [2022-07-22 21:43:44,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:04,820 INFO L129 PetriNetUnfolder]: 10542/63203 cut-off events. [2022-07-22 21:44:04,820 INFO L130 PetriNetUnfolder]: For 441159/442812 co-relation queries the response was YES.