./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/array-eq-trans.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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:53:51,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:53:51,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:53:51,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:53:51,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:53:51,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:53:51,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:53:51,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:53:51,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:53:51,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:53:51,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:53:51,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:53:51,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:53:51,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:53:51,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:53:51,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:53:51,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:53:51,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:53:51,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:53:51,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:53:51,836 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:53:51,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:53:51,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:53:51,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:53:51,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:53:51,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:53:51,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:53:51,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:53:51,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:53:51,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:53:51,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:53:51,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:53:51,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:53:51,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:53:51,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:53:51,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:53:51,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:53:51,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:53:51,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:53:51,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:53:51,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:53:51,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:53:51,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:53:51,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:53:51,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:53:51,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:53:51,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:53:51,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:53:51,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:53:51,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:53:51,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:53:51,893 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:53:51,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:53:51,894 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:53:51,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:53:51,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:53:51,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:53:51,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:53:51,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:53:51,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:53:51,895 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:53:51,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:53:51,895 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:53:51,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:53:51,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:53:51,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:53:51,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:53:51,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:53:51,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:53:51,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:53:51,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:53:51,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:53:51,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:53:51,897 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:53:51,897 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:53:51,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:53:51,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-07-21 08:53:52,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:53:52,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:53:52,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:53:52,203 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:53:52,203 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:53:52,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-07-21 08:53:52,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7abbe5b1/1c0a0e7c4ffb489c9c9b1723acbaeef2/FLAG51ca75eec [2022-07-21 08:53:52,655 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:53:52,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-07-21 08:53:52,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7abbe5b1/1c0a0e7c4ffb489c9c9b1723acbaeef2/FLAG51ca75eec [2022-07-21 08:53:52,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7abbe5b1/1c0a0e7c4ffb489c9c9b1723acbaeef2 [2022-07-21 08:53:52,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:53:52,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:53:52,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:53:52,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:53:52,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:53:52,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:52,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e9651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52, skipping insertion in model container [2022-07-21 08:53:52,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:52,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:53:52,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:53:52,872 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/array-eq-trans.wvr.c[2737,2750] [2022-07-21 08:53:52,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:53:52,901 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:53:52,934 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/array-eq-trans.wvr.c[2737,2750] [2022-07-21 08:53:52,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:53:52,954 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:53:52,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52 WrapperNode [2022-07-21 08:53:52,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:53:52,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:53:52,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:53:52,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:53:52,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:52,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:53,008 INFO L137 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 204 [2022-07-21 08:53:53,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:53:53,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:53:53,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:53:53,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:53:53,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:53,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:53,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:53,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:53,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:53,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:53,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:53,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:53:53,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:53:53,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:53:53,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:53:53,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (1/1) ... [2022-07-21 08:53:53,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:53:53,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:53,100 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) [2022-07-21 08:53:53,128 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 [2022-07-21 08:53:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:53:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 08:53:53,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 08:53:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 08:53:53,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 08:53:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 08:53:53,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 08:53:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:53:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:53:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:53:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 08:53:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:53:53,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:53:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:53:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:53:53,144 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:53:53,265 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:53:53,266 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:53:53,655 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:53:53,667 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:53:53,669 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 08:53:53,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:53 BoogieIcfgContainer [2022-07-21 08:53:53,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:53:53,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:53:53,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:53:53,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:53:53,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:53:52" (1/3) ... [2022-07-21 08:53:53,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f37a396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:53, skipping insertion in model container [2022-07-21 08:53:53,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:52" (2/3) ... [2022-07-21 08:53:53,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f37a396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:53, skipping insertion in model container [2022-07-21 08:53:53,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:53" (3/3) ... [2022-07-21 08:53:53,677 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2022-07-21 08:53:53,680 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:53:53,686 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:53:53,686 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:53:53,686 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:53:53,753 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:53:53,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 286 places, 306 transitions, 636 flow [2022-07-21 08:53:53,903 INFO L129 PetriNetUnfolder]: 30/303 cut-off events. [2022-07-21 08:53:53,904 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:53:53,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 303 events. 30/303 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 234 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 201. Up to 3 conditions per place. [2022-07-21 08:53:53,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 306 transitions, 636 flow [2022-07-21 08:53:53,917 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 292 transitions, 602 flow [2022-07-21 08:53:53,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:53:53,936 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@44a81f6d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@565ab28c [2022-07-21 08:53:53,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:53:53,973 INFO L129 PetriNetUnfolder]: 30/291 cut-off events. [2022-07-21 08:53:53,973 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:53:53,974 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:53,974 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] [2022-07-21 08:53:53,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1783638466, now seen corresponding path program 1 times [2022-07-21 08:53:53,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:53,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420893552] [2022-07-21 08:53:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:53,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:54,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:54,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420893552] [2022-07-21 08:53:54,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420893552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:54,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:54,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:53:54,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378035585] [2022-07-21 08:53:54,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:54,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:53:54,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:54,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:53:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:53:54,241 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 306 [2022-07-21 08:53:54,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 292 transitions, 602 flow. Second operand has 2 states, 2 states have (on average 289.0) internal successors, (578), 2 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:54,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 306 [2022-07-21 08:53:54,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:54,298 INFO L129 PetriNetUnfolder]: 15/277 cut-off events. [2022-07-21 08:53:54,299 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-21 08:53:54,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 277 events. 15/277 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 221 event pairs, 0 based on Foata normal form. 21/274 useless extension candidates. Maximal degree in co-relation 192. Up to 7 conditions per place. [2022-07-21 08:53:54,302 INFO L132 encePairwiseOnDemand]: 291/306 looper letters, 6 selfloop transitions, 0 changer transitions 9/277 dead transitions. [2022-07-21 08:53:54,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 277 transitions, 584 flow [2022-07-21 08:53:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:53:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:53:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 589 transitions. [2022-07-21 08:53:54,319 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9624183006535948 [2022-07-21 08:53:54,319 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 589 transitions. [2022-07-21 08:53:54,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 589 transitions. [2022-07-21 08:53:54,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:54,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 589 transitions. [2022-07-21 08:53:54,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 294.5) internal successors, (589), 2 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,335 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,337 INFO L186 Difference]: Start difference. First operand has 272 places, 292 transitions, 602 flow. Second operand 2 states and 589 transitions. [2022-07-21 08:53:54,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 277 transitions, 584 flow [2022-07-21 08:53:54,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 277 transitions, 572 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 08:53:54,348 INFO L242 Difference]: Finished difference. Result has 267 places, 268 transitions, 542 flow [2022-07-21 08:53:54,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=542, PETRI_PLACES=267, PETRI_TRANSITIONS=268} [2022-07-21 08:53:54,353 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, -5 predicate places. [2022-07-21 08:53:54,354 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 268 transitions, 542 flow [2022-07-21 08:53:54,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 289.0) internal successors, (578), 2 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,354 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:54,357 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] [2022-07-21 08:53:54,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:53:54,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash 9750274, now seen corresponding path program 1 times [2022-07-21 08:53:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:54,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300450211] [2022-07-21 08:53:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:54,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:54,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300450211] [2022-07-21 08:53:54,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300450211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:54,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:54,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:53:54,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321025592] [2022-07-21 08:53:54,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:54,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:53:54,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:54,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:53:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:53:54,649 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 306 [2022-07-21 08:53:54,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 268 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 242.2) internal successors, (1211), 5 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:54,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 306 [2022-07-21 08:53:54,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:54,752 INFO L129 PetriNetUnfolder]: 14/272 cut-off events. [2022-07-21 08:53:54,752 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:53:54,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 272 events. 14/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 212 event pairs, 0 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 326. Up to 48 conditions per place. [2022-07-21 08:53:54,754 INFO L132 encePairwiseOnDemand]: 302/306 looper letters, 47 selfloop transitions, 0 changer transitions 4/271 dead transitions. [2022-07-21 08:53:54,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 271 transitions, 650 flow [2022-07-21 08:53:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:53:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 08:53:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1217 transitions. [2022-07-21 08:53:54,756 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954248366013071 [2022-07-21 08:53:54,756 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1217 transitions. [2022-07-21 08:53:54,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1217 transitions. [2022-07-21 08:53:54,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:54,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1217 transitions. [2022-07-21 08:53:54,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 243.4) internal successors, (1217), 5 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,762 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,762 INFO L186 Difference]: Start difference. First operand has 267 places, 268 transitions, 542 flow. Second operand 5 states and 1217 transitions. [2022-07-21 08:53:54,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 271 transitions, 650 flow [2022-07-21 08:53:54,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 271 transitions, 650 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:54,768 INFO L242 Difference]: Finished difference. Result has 265 places, 267 transitions, 546 flow [2022-07-21 08:53:54,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=265, PETRI_TRANSITIONS=267} [2022-07-21 08:53:54,769 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, -7 predicate places. [2022-07-21 08:53:54,769 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 267 transitions, 546 flow [2022-07-21 08:53:54,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 242.2) internal successors, (1211), 5 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:54,770 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:54,770 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] [2022-07-21 08:53:54,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:53:54,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1489232946, now seen corresponding path program 1 times [2022-07-21 08:53:54,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:54,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917395482] [2022-07-21 08:53:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:54,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:55,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:55,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917395482] [2022-07-21 08:53:55,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917395482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:55,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:55,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:53:55,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458296459] [2022-07-21 08:53:55,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:55,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:53:55,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:55,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:53:55,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:53:55,053 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 306 [2022-07-21 08:53:55,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 267 transitions, 546 flow. Second operand has 7 states, 7 states have (on average 251.42857142857142) internal successors, (1760), 7 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:55,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 306 [2022-07-21 08:53:55,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:55,396 INFO L129 PetriNetUnfolder]: 225/996 cut-off events. [2022-07-21 08:53:55,397 INFO L130 PetriNetUnfolder]: For 44/57 co-relation queries the response was YES. [2022-07-21 08:53:55,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1445 conditions, 996 events. 225/996 cut-off events. For 44/57 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4730 event pairs, 52 based on Foata normal form. 1/879 useless extension candidates. Maximal degree in co-relation 1438. Up to 157 conditions per place. [2022-07-21 08:53:55,407 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 93 selfloop transitions, 13 changer transitions 4/336 dead transitions. [2022-07-21 08:53:55,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 336 transitions, 916 flow [2022-07-21 08:53:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2343 transitions. [2022-07-21 08:53:55,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8507625272331155 [2022-07-21 08:53:55,411 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2343 transitions. [2022-07-21 08:53:55,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2343 transitions. [2022-07-21 08:53:55,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:55,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2343 transitions. [2022-07-21 08:53:55,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 260.3333333333333) internal successors, (2343), 9 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) [2022-07-21 08:53:55,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,431 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,431 INFO L186 Difference]: Start difference. First operand has 265 places, 267 transitions, 546 flow. Second operand 9 states and 2343 transitions. [2022-07-21 08:53:55,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 336 transitions, 916 flow [2022-07-21 08:53:55,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 336 transitions, 906 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-07-21 08:53:55,436 INFO L242 Difference]: Finished difference. Result has 271 places, 275 transitions, 607 flow [2022-07-21 08:53:55,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=607, PETRI_PLACES=271, PETRI_TRANSITIONS=275} [2022-07-21 08:53:55,437 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, -1 predicate places. [2022-07-21 08:53:55,437 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 275 transitions, 607 flow [2022-07-21 08:53:55,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 251.42857142857142) internal successors, (1760), 7 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,438 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:55,439 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] [2022-07-21 08:53:55,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:53:55,439 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:55,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1007150356, now seen corresponding path program 1 times [2022-07-21 08:53:55,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:55,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125878615] [2022-07-21 08:53:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:55,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:55,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:55,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125878615] [2022-07-21 08:53:55,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125878615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:55,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:55,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:53:55,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950222678] [2022-07-21 08:53:55,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:55,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:53:55,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:53:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:53:55,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 306 [2022-07-21 08:53:55,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 275 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:55,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 306 [2022-07-21 08:53:55,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:55,659 INFO L129 PetriNetUnfolder]: 26/457 cut-off events. [2022-07-21 08:53:55,660 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-21 08:53:55,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 457 events. 26/457 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1045 event pairs, 0 based on Foata normal form. 3/430 useless extension candidates. Maximal degree in co-relation 611. Up to 87 conditions per place. [2022-07-21 08:53:55,662 INFO L132 encePairwiseOnDemand]: 300/306 looper letters, 51 selfloop transitions, 6 changer transitions 7/281 dead transitions. [2022-07-21 08:53:55,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 281 transitions, 755 flow [2022-07-21 08:53:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:53:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:53:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1426 transitions. [2022-07-21 08:53:55,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7766884531590414 [2022-07-21 08:53:55,665 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1426 transitions. [2022-07-21 08:53:55,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1426 transitions. [2022-07-21 08:53:55,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:55,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1426 transitions. [2022-07-21 08:53:55,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.66666666666666) internal successors, (1426), 6 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,671 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,672 INFO L186 Difference]: Start difference. First operand has 271 places, 275 transitions, 607 flow. Second operand 6 states and 1426 transitions. [2022-07-21 08:53:55,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 281 transitions, 755 flow [2022-07-21 08:53:55,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 281 transitions, 747 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-21 08:53:55,677 INFO L242 Difference]: Finished difference. Result has 275 places, 274 transitions, 615 flow [2022-07-21 08:53:55,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=615, PETRI_PLACES=275, PETRI_TRANSITIONS=274} [2022-07-21 08:53:55,678 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 3 predicate places. [2022-07-21 08:53:55,678 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 274 transitions, 615 flow [2022-07-21 08:53:55,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,679 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:55,679 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, 1, 1, 1] [2022-07-21 08:53:55,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:53:55,679 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash 565775480, now seen corresponding path program 1 times [2022-07-21 08:53:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:55,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875911173] [2022-07-21 08:53:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:55,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:55,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:55,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875911173] [2022-07-21 08:53:55,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875911173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:55,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:55,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:53:55,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786670968] [2022-07-21 08:53:55,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:55,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:53:55,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:53:55,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:53:55,800 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-21 08:53:55,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 274 transitions, 615 flow. Second operand has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:55,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:55,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-21 08:53:55,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:56,094 INFO L129 PetriNetUnfolder]: 189/1089 cut-off events. [2022-07-21 08:53:56,095 INFO L130 PetriNetUnfolder]: For 43/74 co-relation queries the response was YES. [2022-07-21 08:53:56,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 1089 events. 189/1089 cut-off events. For 43/74 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5504 event pairs, 56 based on Foata normal form. 2/957 useless extension candidates. Maximal degree in co-relation 1544. Up to 135 conditions per place. [2022-07-21 08:53:56,102 INFO L132 encePairwiseOnDemand]: 292/306 looper letters, 103 selfloop transitions, 14 changer transitions 2/325 dead transitions. [2022-07-21 08:53:56,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 325 transitions, 974 flow [2022-07-21 08:53:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:53:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 08:53:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2603 transitions. [2022-07-21 08:53:56,107 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.773321449792038 [2022-07-21 08:53:56,107 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2603 transitions. [2022-07-21 08:53:56,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2603 transitions. [2022-07-21 08:53:56,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:56,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2603 transitions. [2022-07-21 08:53:56,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 236.63636363636363) internal successors, (2603), 11 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:56,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:56,116 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:56,116 INFO L186 Difference]: Start difference. First operand has 275 places, 274 transitions, 615 flow. Second operand 11 states and 2603 transitions. [2022-07-21 08:53:56,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 325 transitions, 974 flow [2022-07-21 08:53:56,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 325 transitions, 956 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-07-21 08:53:56,121 INFO L242 Difference]: Finished difference. Result has 280 places, 278 transitions, 649 flow [2022-07-21 08:53:56,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=649, PETRI_PLACES=280, PETRI_TRANSITIONS=278} [2022-07-21 08:53:56,122 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 8 predicate places. [2022-07-21 08:53:56,123 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 278 transitions, 649 flow [2022-07-21 08:53:56,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:56,123 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:56,123 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, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:56,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:53:56,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1692416661, now seen corresponding path program 1 times [2022-07-21 08:53:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:56,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352370754] [2022-07-21 08:53:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:56,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:56,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:56,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352370754] [2022-07-21 08:53:56,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352370754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:56,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:56,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:53:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697385459] [2022-07-21 08:53:56,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:56,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:53:56,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:53:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:53:56,227 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-07-21 08:53:56,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 278 transitions, 649 flow. Second operand has 7 states, 7 states have (on average 238.14285714285714) internal successors, (1667), 7 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:56,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:56,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-07-21 08:53:56,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:56,551 INFO L129 PetriNetUnfolder]: 252/1683 cut-off events. [2022-07-21 08:53:56,551 INFO L130 PetriNetUnfolder]: For 181/198 co-relation queries the response was YES. [2022-07-21 08:53:56,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 1683 events. 252/1683 cut-off events. For 181/198 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9746 event pairs, 86 based on Foata normal form. 0/1538 useless extension candidates. Maximal degree in co-relation 2425. Up to 213 conditions per place. [2022-07-21 08:53:56,558 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 111 selfloop transitions, 14 changer transitions 3/342 dead transitions. [2022-07-21 08:53:56,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 342 transitions, 1082 flow [2022-07-21 08:53:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:53:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:53:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2438 transitions. [2022-07-21 08:53:56,565 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7967320261437908 [2022-07-21 08:53:56,565 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2438 transitions. [2022-07-21 08:53:56,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2438 transitions. [2022-07-21 08:53:56,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:56,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2438 transitions. [2022-07-21 08:53:56,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.8) internal successors, (2438), 10 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:56,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:56,574 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:56,574 INFO L186 Difference]: Start difference. First operand has 280 places, 278 transitions, 649 flow. Second operand 10 states and 2438 transitions. [2022-07-21 08:53:56,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 342 transitions, 1082 flow [2022-07-21 08:53:56,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 342 transitions, 1069 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-21 08:53:56,589 INFO L242 Difference]: Finished difference. Result has 287 places, 283 transitions, 701 flow [2022-07-21 08:53:56,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=701, PETRI_PLACES=287, PETRI_TRANSITIONS=283} [2022-07-21 08:53:56,591 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 15 predicate places. [2022-07-21 08:53:56,592 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 283 transitions, 701 flow [2022-07-21 08:53:56,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.14285714285714) internal successors, (1667), 7 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:56,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:56,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:56,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:53:56,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:56,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1914456625, now seen corresponding path program 1 times [2022-07-21 08:53:56,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:56,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944674231] [2022-07-21 08:53:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:56,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:56,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:56,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944674231] [2022-07-21 08:53:56,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944674231] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:56,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837844376] [2022-07-21 08:53:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:56,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:56,728 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) [2022-07-21 08:53:56,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:53:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:53:56,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:57,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:57,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837844376] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:57,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:53:57,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-07-21 08:53:57,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266958823] [2022-07-21 08:53:57,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:53:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:57,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:53:57,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:53:57,504 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-21 08:53:57,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 283 transitions, 701 flow. Second operand has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:57,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:57,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-21 08:53:57,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:58,136 INFO L129 PetriNetUnfolder]: 622/3678 cut-off events. [2022-07-21 08:53:58,137 INFO L130 PetriNetUnfolder]: For 324/346 co-relation queries the response was YES. [2022-07-21 08:53:58,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5485 conditions, 3678 events. 622/3678 cut-off events. For 324/346 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 29526 event pairs, 198 based on Foata normal form. 0/3349 useless extension candidates. Maximal degree in co-relation 5472. Up to 484 conditions per place. [2022-07-21 08:53:58,155 INFO L132 encePairwiseOnDemand]: 290/306 looper letters, 112 selfloop transitions, 25 changer transitions 0/348 dead transitions. [2022-07-21 08:53:58,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 348 transitions, 1127 flow [2022-07-21 08:53:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:53:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 08:53:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3524 transitions. [2022-07-21 08:53:58,161 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7677559912854031 [2022-07-21 08:53:58,161 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3524 transitions. [2022-07-21 08:53:58,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3524 transitions. [2022-07-21 08:53:58,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:58,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3524 transitions. [2022-07-21 08:53:58,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 234.93333333333334) internal successors, (3524), 15 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:58,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:58,175 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:58,175 INFO L186 Difference]: Start difference. First operand has 287 places, 283 transitions, 701 flow. Second operand 15 states and 3524 transitions. [2022-07-21 08:53:58,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 348 transitions, 1127 flow [2022-07-21 08:53:58,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 348 transitions, 1119 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:53:58,182 INFO L242 Difference]: Finished difference. Result has 306 places, 295 transitions, 820 flow [2022-07-21 08:53:58,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=820, PETRI_PLACES=306, PETRI_TRANSITIONS=295} [2022-07-21 08:53:58,183 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 34 predicate places. [2022-07-21 08:53:58,183 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 295 transitions, 820 flow [2022-07-21 08:53:58,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:58,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:58,184 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:58,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:58,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:58,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:58,390 INFO L85 PathProgramCache]: Analyzing trace with hash -591311525, now seen corresponding path program 1 times [2022-07-21 08:53:58,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:58,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694532190] [2022-07-21 08:53:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:58,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:53:58,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:58,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694532190] [2022-07-21 08:53:58,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694532190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:58,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:58,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 08:53:58,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912358257] [2022-07-21 08:53:58,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:58,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:53:58,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:53:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:53:58,629 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-07-21 08:53:58,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 295 transitions, 820 flow. Second operand has 13 states, 13 states have (on average 197.07692307692307) internal successors, (2562), 13 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:58,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:58,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-07-21 08:53:58,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:59,904 INFO L129 PetriNetUnfolder]: 1582/7211 cut-off events. [2022-07-21 08:53:59,905 INFO L130 PetriNetUnfolder]: For 1785/1915 co-relation queries the response was YES. [2022-07-21 08:53:59,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12079 conditions, 7211 events. 1582/7211 cut-off events. For 1785/1915 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 69072 event pairs, 449 based on Foata normal form. 61/6755 useless extension candidates. Maximal degree in co-relation 12059. Up to 1131 conditions per place. [2022-07-21 08:53:59,946 INFO L132 encePairwiseOnDemand]: 280/306 looper letters, 162 selfloop transitions, 29 changer transitions 4/382 dead transitions. [2022-07-21 08:53:59,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 382 transitions, 1460 flow [2022-07-21 08:53:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 08:53:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-21 08:53:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3991 transitions. [2022-07-21 08:53:59,954 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.652124183006536 [2022-07-21 08:53:59,954 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3991 transitions. [2022-07-21 08:53:59,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3991 transitions. [2022-07-21 08:53:59,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:59,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3991 transitions. [2022-07-21 08:53:59,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 199.55) internal successors, (3991), 20 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:59,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 306.0) internal successors, (6426), 21 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:59,968 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 306.0) internal successors, (6426), 21 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:59,968 INFO L186 Difference]: Start difference. First operand has 306 places, 295 transitions, 820 flow. Second operand 20 states and 3991 transitions. [2022-07-21 08:53:59,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 382 transitions, 1460 flow [2022-07-21 08:53:59,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 382 transitions, 1449 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 08:53:59,980 INFO L242 Difference]: Finished difference. Result has 326 places, 303 transitions, 926 flow [2022-07-21 08:53:59,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=926, PETRI_PLACES=326, PETRI_TRANSITIONS=303} [2022-07-21 08:53:59,983 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-07-21 08:53:59,983 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 303 transitions, 926 flow [2022-07-21 08:53:59,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 197.07692307692307) internal successors, (2562), 13 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:59,984 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:59,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:59,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:53:59,984 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash -484011581, now seen corresponding path program 1 times [2022-07-21 08:53:59,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:59,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504331493] [2022-07-21 08:53:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:59,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:54:00,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504331493] [2022-07-21 08:54:00,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504331493] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099227801] [2022-07-21 08:54:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:00,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:00,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:00,088 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) [2022-07-21 08:54:00,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:54:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:00,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 08:54:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:54:00,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:54:00,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099227801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:00,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:54:00,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-07-21 08:54:00,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567113910] [2022-07-21 08:54:00,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:00,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:54:00,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:54:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-21 08:54:00,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-07-21 08:54:00,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 303 transitions, 926 flow. Second operand has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:00,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:00,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-07-21 08:54:00,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:01,457 INFO L129 PetriNetUnfolder]: 1266/7212 cut-off events. [2022-07-21 08:54:01,457 INFO L130 PetriNetUnfolder]: For 1948/1990 co-relation queries the response was YES. [2022-07-21 08:54:01,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11200 conditions, 7212 events. 1266/7212 cut-off events. For 1948/1990 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 71914 event pairs, 552 based on Foata normal form. 85/6699 useless extension candidates. Maximal degree in co-relation 11174. Up to 884 conditions per place. [2022-07-21 08:54:01,495 INFO L132 encePairwiseOnDemand]: 296/306 looper letters, 98 selfloop transitions, 11 changer transitions 2/342 dead transitions. [2022-07-21 08:54:01,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 342 transitions, 1263 flow [2022-07-21 08:54:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:54:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:54:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1950 transitions. [2022-07-21 08:54:01,500 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7965686274509803 [2022-07-21 08:54:01,501 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1950 transitions. [2022-07-21 08:54:01,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1950 transitions. [2022-07-21 08:54:01,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:01,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1950 transitions. [2022-07-21 08:54:01,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 243.75) internal successors, (1950), 8 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:01,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:01,509 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:01,509 INFO L186 Difference]: Start difference. First operand has 326 places, 303 transitions, 926 flow. Second operand 8 states and 1950 transitions. [2022-07-21 08:54:01,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 342 transitions, 1263 flow [2022-07-21 08:54:01,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 342 transitions, 1219 flow, removed 6 selfloop flow, removed 13 redundant places. [2022-07-21 08:54:01,522 INFO L242 Difference]: Finished difference. Result has 320 places, 305 transitions, 922 flow [2022-07-21 08:54:01,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=922, PETRI_PLACES=320, PETRI_TRANSITIONS=305} [2022-07-21 08:54:01,523 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 48 predicate places. [2022-07-21 08:54:01,523 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 305 transitions, 922 flow [2022-07-21 08:54:01,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:01,524 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:01,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:01,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:01,746 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,SelfDestructingSolverStorable8 [2022-07-21 08:54:01,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:54:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash -541306598, now seen corresponding path program 1 times [2022-07-21 08:54:01,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:01,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101273676] [2022-07-21 08:54:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:01,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:54:01,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101273676] [2022-07-21 08:54:01,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101273676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:01,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:01,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:54:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754688282] [2022-07-21 08:54:01,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:01,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:54:01,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:54:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:54:01,816 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-07-21 08:54:01,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 305 transitions, 922 flow. Second operand has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:01,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:01,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-07-21 08:54:01,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:02,355 INFO L129 PetriNetUnfolder]: 383/3677 cut-off events. [2022-07-21 08:54:02,356 INFO L130 PetriNetUnfolder]: For 992/1125 co-relation queries the response was YES. [2022-07-21 08:54:02,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5472 conditions, 3677 events. 383/3677 cut-off events. For 992/1125 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 30511 event pairs, 151 based on Foata normal form. 10/3439 useless extension candidates. Maximal degree in co-relation 5445. Up to 408 conditions per place. [2022-07-21 08:54:02,375 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 80 selfloop transitions, 11 changer transitions 41/362 dead transitions. [2022-07-21 08:54:02,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 362 transitions, 1393 flow [2022-07-21 08:54:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:54:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:54:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2434 transitions. [2022-07-21 08:54:02,380 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954248366013071 [2022-07-21 08:54:02,380 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2434 transitions. [2022-07-21 08:54:02,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2434 transitions. [2022-07-21 08:54:02,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:02,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2434 transitions. [2022-07-21 08:54:02,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.4) internal successors, (2434), 10 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:02,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:02,389 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:02,389 INFO L186 Difference]: Start difference. First operand has 320 places, 305 transitions, 922 flow. Second operand 10 states and 2434 transitions. [2022-07-21 08:54:02,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 362 transitions, 1393 flow [2022-07-21 08:54:02,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 362 transitions, 1375 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 08:54:02,397 INFO L242 Difference]: Finished difference. Result has 326 places, 302 transitions, 913 flow [2022-07-21 08:54:02,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=913, PETRI_PLACES=326, PETRI_TRANSITIONS=302} [2022-07-21 08:54:02,398 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-07-21 08:54:02,398 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 302 transitions, 913 flow [2022-07-21 08:54:02,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:02,399 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:02,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:02,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:54:02,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:54:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash -671641809, now seen corresponding path program 1 times [2022-07-21 08:54:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466490624] [2022-07-21 08:54:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:02,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:54:02,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:02,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466490624] [2022-07-21 08:54:02,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466490624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:02,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643659771] [2022-07-21 08:54:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:02,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:02,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:02,504 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) [2022-07-21 08:54:02,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:54:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:54:02,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:54:02,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:54:03,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643659771] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:03,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:54:03,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-07-21 08:54:03,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740075130] [2022-07-21 08:54:03,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:03,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:54:03,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:03,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:54:03,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:54:03,089 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-21 08:54:03,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 302 transitions, 913 flow. Second operand has 8 states, 8 states have (on average 232.25) internal successors, (1858), 8 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:03,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:03,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-21 08:54:03,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:03,587 INFO L129 PetriNetUnfolder]: 363/3496 cut-off events. [2022-07-21 08:54:03,587 INFO L130 PetriNetUnfolder]: For 1105/1214 co-relation queries the response was YES. [2022-07-21 08:54:03,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5337 conditions, 3496 events. 363/3496 cut-off events. For 1105/1214 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 29275 event pairs, 121 based on Foata normal form. 23/3284 useless extension candidates. Maximal degree in co-relation 5309. Up to 393 conditions per place. [2022-07-21 08:54:03,606 INFO L132 encePairwiseOnDemand]: 295/306 looper letters, 96 selfloop transitions, 17 changer transitions 6/330 dead transitions. [2022-07-21 08:54:03,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 330 transitions, 1221 flow [2022-07-21 08:54:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:54:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 08:54:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2591 transitions. [2022-07-21 08:54:03,611 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7697563874034462 [2022-07-21 08:54:03,611 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2591 transitions. [2022-07-21 08:54:03,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2591 transitions. [2022-07-21 08:54:03,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:03,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2591 transitions. [2022-07-21 08:54:03,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 235.54545454545453) internal successors, (2591), 11 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:03,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:03,620 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:03,620 INFO L186 Difference]: Start difference. First operand has 326 places, 302 transitions, 913 flow. Second operand 11 states and 2591 transitions. [2022-07-21 08:54:03,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 330 transitions, 1221 flow [2022-07-21 08:54:03,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 330 transitions, 1171 flow, removed 6 selfloop flow, removed 13 redundant places. [2022-07-21 08:54:03,627 INFO L242 Difference]: Finished difference. Result has 320 places, 296 transitions, 879 flow [2022-07-21 08:54:03,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=879, PETRI_PLACES=320, PETRI_TRANSITIONS=296} [2022-07-21 08:54:03,628 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 48 predicate places. [2022-07-21 08:54:03,629 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 296 transitions, 879 flow [2022-07-21 08:54:03,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.25) internal successors, (1858), 8 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:03,629 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:03,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:03,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:03,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:03,841 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:54:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash 45230378, now seen corresponding path program 1 times [2022-07-21 08:54:03,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:03,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485325793] [2022-07-21 08:54:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:03,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:54:03,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:03,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485325793] [2022-07-21 08:54:03,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485325793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:03,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:03,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:54:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11341215] [2022-07-21 08:54:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:54:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:54:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:54:03,905 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 306 [2022-07-21 08:54:03,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 296 transitions, 879 flow. Second operand has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:03,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:03,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 306 [2022-07-21 08:54:03,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:04,201 INFO L129 PetriNetUnfolder]: 60/2324 cut-off events. [2022-07-21 08:54:04,202 INFO L130 PetriNetUnfolder]: For 494/503 co-relation queries the response was YES. [2022-07-21 08:54:04,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3749 conditions, 2324 events. 60/2324 cut-off events. For 494/503 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 18121 event pairs, 0 based on Foata normal form. 27/2256 useless extension candidates. Maximal degree in co-relation 3723. Up to 577 conditions per place. [2022-07-21 08:54:04,210 INFO L132 encePairwiseOnDemand]: 300/306 looper letters, 52 selfloop transitions, 5 changer transitions 7/302 dead transitions. [2022-07-21 08:54:04,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 302 transitions, 1030 flow [2022-07-21 08:54:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:54:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:54:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1426 transitions. [2022-07-21 08:54:04,212 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7766884531590414 [2022-07-21 08:54:04,212 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1426 transitions. [2022-07-21 08:54:04,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1426 transitions. [2022-07-21 08:54:04,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:04,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1426 transitions. [2022-07-21 08:54:04,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.66666666666666) internal successors, (1426), 6 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:04,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:04,217 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:04,218 INFO L186 Difference]: Start difference. First operand has 320 places, 296 transitions, 879 flow. Second operand 6 states and 1426 transitions. [2022-07-21 08:54:04,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 302 transitions, 1030 flow [2022-07-21 08:54:04,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 302 transitions, 990 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-07-21 08:54:04,225 INFO L242 Difference]: Finished difference. Result has 314 places, 295 transitions, 853 flow [2022-07-21 08:54:04,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=853, PETRI_PLACES=314, PETRI_TRANSITIONS=295} [2022-07-21 08:54:04,226 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 42 predicate places. [2022-07-21 08:54:04,226 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 295 transitions, 853 flow [2022-07-21 08:54:04,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:04,226 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:04,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:04,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:54:04,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:54:04,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash -940246847, now seen corresponding path program 1 times [2022-07-21 08:54:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:04,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127821284] [2022-07-21 08:54:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:04,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:54:04,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:04,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127821284] [2022-07-21 08:54:04,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127821284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:04,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866003374] [2022-07-21 08:54:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:04,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:04,340 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) [2022-07-21 08:54:04,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:54:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:04,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:54:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:54:04,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:54:04,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866003374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:04,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:54:04,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2022-07-21 08:54:04,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277440914] [2022-07-21 08:54:04,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:04,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:54:04,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:04,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:54:04,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-21 08:54:04,760 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-21 08:54:04,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 295 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:04,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:04,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-21 08:54:04,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:05,354 INFO L129 PetriNetUnfolder]: 749/3930 cut-off events. [2022-07-21 08:54:05,354 INFO L130 PetriNetUnfolder]: For 1235/1255 co-relation queries the response was YES. [2022-07-21 08:54:05,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6245 conditions, 3930 events. 749/3930 cut-off events. For 1235/1255 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 34531 event pairs, 269 based on Foata normal form. 15/3552 useless extension candidates. Maximal degree in co-relation 6218. Up to 651 conditions per place. [2022-07-21 08:54:05,382 INFO L132 encePairwiseOnDemand]: 294/306 looper letters, 86 selfloop transitions, 8 changer transitions 11/325 dead transitions. [2022-07-21 08:54:05,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 325 transitions, 1139 flow [2022-07-21 08:54:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:54:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:54:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2135 transitions. [2022-07-21 08:54:05,386 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7752360203340596 [2022-07-21 08:54:05,386 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2135 transitions. [2022-07-21 08:54:05,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2135 transitions. [2022-07-21 08:54:05,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:05,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2135 transitions. [2022-07-21 08:54:05,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 237.22222222222223) internal successors, (2135), 9 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:05,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:05,392 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:05,392 INFO L186 Difference]: Start difference. First operand has 314 places, 295 transitions, 853 flow. Second operand 9 states and 2135 transitions. [2022-07-21 08:54:05,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 325 transitions, 1139 flow [2022-07-21 08:54:05,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 325 transitions, 1123 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-07-21 08:54:05,401 INFO L242 Difference]: Finished difference. Result has 316 places, 294 transitions, 853 flow [2022-07-21 08:54:05,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=853, PETRI_PLACES=316, PETRI_TRANSITIONS=294} [2022-07-21 08:54:05,402 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 44 predicate places. [2022-07-21 08:54:05,402 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 294 transitions, 853 flow [2022-07-21 08:54:05,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:05,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:05,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:05,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:05,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:05,608 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:54:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1218469367, now seen corresponding path program 1 times [2022-07-21 08:54:05,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:05,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340071429] [2022-07-21 08:54:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:05,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:54:05,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340071429] [2022-07-21 08:54:05,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340071429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332302477] [2022-07-21 08:54:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:05,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:05,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:05,734 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) [2022-07-21 08:54:05,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:54:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:05,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 08:54:05,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:54:06,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:54:06,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332302477] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:06,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:54:06,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 27 [2022-07-21 08:54:06,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547713133] [2022-07-21 08:54:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:06,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 08:54:06,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 08:54:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-07-21 08:54:06,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 306 [2022-07-21 08:54:06,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 294 transitions, 853 flow. Second operand has 11 states, 11 states have (on average 222.8181818181818) internal successors, (2451), 11 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:06,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:06,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 306 [2022-07-21 08:54:06,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:07,729 INFO L129 PetriNetUnfolder]: 1313/5654 cut-off events. [2022-07-21 08:54:07,729 INFO L130 PetriNetUnfolder]: For 2150/2225 co-relation queries the response was YES. [2022-07-21 08:54:07,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9797 conditions, 5654 events. 1313/5654 cut-off events. For 2150/2225 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 52443 event pairs, 404 based on Foata normal form. 58/5327 useless extension candidates. Maximal degree in co-relation 9771. Up to 800 conditions per place. [2022-07-21 08:54:07,754 INFO L132 encePairwiseOnDemand]: 290/306 looper letters, 130 selfloop transitions, 13 changer transitions 5/356 dead transitions. [2022-07-21 08:54:07,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 356 transitions, 1342 flow [2022-07-21 08:54:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:54:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 08:54:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3392 transitions. [2022-07-21 08:54:07,757 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7389978213507625 [2022-07-21 08:54:07,758 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3392 transitions. [2022-07-21 08:54:07,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3392 transitions. [2022-07-21 08:54:07,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:07,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3392 transitions. [2022-07-21 08:54:07,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 226.13333333333333) internal successors, (3392), 15 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:07,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:07,766 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:07,766 INFO L186 Difference]: Start difference. First operand has 316 places, 294 transitions, 853 flow. Second operand 15 states and 3392 transitions. [2022-07-21 08:54:07,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 356 transitions, 1342 flow [2022-07-21 08:54:07,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 356 transitions, 1306 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-07-21 08:54:07,775 INFO L242 Difference]: Finished difference. Result has 325 places, 296 transitions, 881 flow [2022-07-21 08:54:07,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=881, PETRI_PLACES=325, PETRI_TRANSITIONS=296} [2022-07-21 08:54:07,776 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 53 predicate places. [2022-07-21 08:54:07,776 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 296 transitions, 881 flow [2022-07-21 08:54:07,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 222.8181818181818) internal successors, (2451), 11 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:07,777 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:07,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:07,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:07,995 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,SelfDestructingSolverStorable13 [2022-07-21 08:54:07,996 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:54:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash -36899099, now seen corresponding path program 1 times [2022-07-21 08:54:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:07,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597466229] [2022-07-21 08:54:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:54:08,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:08,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597466229] [2022-07-21 08:54:08,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597466229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:08,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640080330] [2022-07-21 08:54:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:08,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:08,097 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) [2022-07-21 08:54:08,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:54:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:54:08,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:54:08,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:54:08,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640080330] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:08,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:54:08,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-07-21 08:54:08,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509772022] [2022-07-21 08:54:08,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:08,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:54:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:08,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:54:08,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:54:08,836 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-07-21 08:54:08,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 296 transitions, 881 flow. Second operand has 8 states, 8 states have (on average 232.75) internal successors, (1862), 8 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:08,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:08,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-07-21 08:54:08,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:09,456 INFO L129 PetriNetUnfolder]: 792/4472 cut-off events. [2022-07-21 08:54:09,456 INFO L130 PetriNetUnfolder]: For 1858/1941 co-relation queries the response was YES. [2022-07-21 08:54:09,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7486 conditions, 4472 events. 792/4472 cut-off events. For 1858/1941 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 40822 event pairs, 300 based on Foata normal form. 72/4086 useless extension candidates. Maximal degree in co-relation 7457. Up to 622 conditions per place. [2022-07-21 08:54:09,481 INFO L132 encePairwiseOnDemand]: 291/306 looper letters, 92 selfloop transitions, 19 changer transitions 0/334 dead transitions. [2022-07-21 08:54:09,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 334 transitions, 1217 flow [2022-07-21 08:54:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 08:54:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 08:54:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3039 transitions. [2022-07-21 08:54:09,490 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7639517345399698 [2022-07-21 08:54:09,490 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3039 transitions. [2022-07-21 08:54:09,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3039 transitions. [2022-07-21 08:54:09,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:09,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3039 transitions. [2022-07-21 08:54:09,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 233.76923076923077) internal successors, (3039), 13 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,497 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,497 INFO L186 Difference]: Start difference. First operand has 325 places, 296 transitions, 881 flow. Second operand 13 states and 3039 transitions. [2022-07-21 08:54:09,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 334 transitions, 1217 flow [2022-07-21 08:54:09,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 334 transitions, 1183 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-07-21 08:54:09,506 INFO L242 Difference]: Finished difference. Result has 326 places, 303 transitions, 930 flow [2022-07-21 08:54:09,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=930, PETRI_PLACES=326, PETRI_TRANSITIONS=303} [2022-07-21 08:54:09,507 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-07-21 08:54:09,507 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 303 transitions, 930 flow [2022-07-21 08:54:09,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.75) internal successors, (1862), 8 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,508 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:09,508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:09,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:09,723 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,SelfDestructingSolverStorable14 [2022-07-21 08:54:09,724 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:54:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash -864065180, now seen corresponding path program 1 times [2022-07-21 08:54:09,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:09,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397822844] [2022-07-21 08:54:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:09,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:54:09,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:09,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397822844] [2022-07-21 08:54:09,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397822844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:09,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138258699] [2022-07-21 08:54:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:09,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:09,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:09,847 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) [2022-07-21 08:54:09,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:54:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 08:54:09,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:54:10,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:54:11,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138258699] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:11,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:54:11,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 25 [2022-07-21 08:54:11,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652543067] [2022-07-21 08:54:11,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:11,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 08:54:11,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 08:54:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-07-21 08:54:11,096 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 306 [2022-07-21 08:54:11,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 303 transitions, 930 flow. Second operand has 11 states, 11 states have (on average 222.9090909090909) internal successors, (2452), 11 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:11,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:11,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 306 [2022-07-21 08:54:11,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:12,026 INFO L129 PetriNetUnfolder]: 1240/6600 cut-off events. [2022-07-21 08:54:12,026 INFO L130 PetriNetUnfolder]: For 3856/4031 co-relation queries the response was YES. [2022-07-21 08:54:12,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11898 conditions, 6600 events. 1240/6600 cut-off events. For 3856/4031 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 64529 event pairs, 444 based on Foata normal form. 161/6417 useless extension candidates. Maximal degree in co-relation 11870. Up to 956 conditions per place. [2022-07-21 08:54:12,061 INFO L132 encePairwiseOnDemand]: 292/306 looper letters, 143 selfloop transitions, 12 changer transitions 9/374 dead transitions. [2022-07-21 08:54:12,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 374 transitions, 1524 flow [2022-07-21 08:54:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 08:54:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 08:54:12,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2956 transitions. [2022-07-21 08:54:12,064 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.743086978381096 [2022-07-21 08:54:12,065 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2956 transitions. [2022-07-21 08:54:12,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2956 transitions. [2022-07-21 08:54:12,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:12,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2956 transitions. [2022-07-21 08:54:12,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 227.3846153846154) internal successors, (2956), 13 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:12,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:12,072 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:12,072 INFO L186 Difference]: Start difference. First operand has 326 places, 303 transitions, 930 flow. Second operand 13 states and 2956 transitions. [2022-07-21 08:54:12,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 374 transitions, 1524 flow [2022-07-21 08:54:12,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 374 transitions, 1501 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-21 08:54:12,086 INFO L242 Difference]: Finished difference. Result has 338 places, 305 transitions, 954 flow [2022-07-21 08:54:12,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=954, PETRI_PLACES=338, PETRI_TRANSITIONS=305} [2022-07-21 08:54:12,086 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 66 predicate places. [2022-07-21 08:54:12,087 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 305 transitions, 954 flow [2022-07-21 08:54:12,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 222.9090909090909) internal successors, (2452), 11 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:12,087 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:12,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:12,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:12,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:12,305 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:54:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:12,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1537255849, now seen corresponding path program 1 times [2022-07-21 08:54:12,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:12,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944398109] [2022-07-21 08:54:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:12,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:54:13,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:13,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944398109] [2022-07-21 08:54:13,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944398109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:13,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594370821] [2022-07-21 08:54:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:13,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:13,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:13,212 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) [2022-07-21 08:54:13,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 08:54:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:13,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 08:54:13,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:14,487 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 08:54:14,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-21 08:54:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:54:14,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:16,509 INFO L356 Elim1Store]: treesize reduction 62, result has 77.6 percent of original size [2022-07-21 08:54:16,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 226 [2022-07-21 08:54:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:54:17,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594370821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:17,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:17,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 13] total 42 [2022-07-21 08:54:17,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544961431] [2022-07-21 08:54:17,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:17,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 08:54:17,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 08:54:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1503, Unknown=1, NotChecked=0, Total=1722 [2022-07-21 08:54:17,577 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-07-21 08:54:17,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 305 transitions, 954 flow. Second operand has 42 states, 42 states have (on average 194.76190476190476) internal successors, (8180), 42 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:17,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:17,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-07-21 08:54:17,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:46,451 INFO L129 PetriNetUnfolder]: 134232/212146 cut-off events. [2022-07-21 08:54:46,451 INFO L130 PetriNetUnfolder]: For 177761/177761 co-relation queries the response was YES. [2022-07-21 08:54:48,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487849 conditions, 212146 events. 134232/212146 cut-off events. For 177761/177761 co-relation queries the response was YES. Maximal size of possible extension queue 6132. Compared 1980921 event pairs, 16534 based on Foata normal form. 0/198627 useless extension candidates. Maximal degree in co-relation 487815. Up to 56933 conditions per place. [2022-07-21 08:54:49,169 INFO L132 encePairwiseOnDemand]: 257/306 looper letters, 1425 selfloop transitions, 355 changer transitions 61/2029 dead transitions. [2022-07-21 08:54:49,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 2029 transitions, 9935 flow [2022-07-21 08:54:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-21 08:54:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-07-21 08:54:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 22057 transitions. [2022-07-21 08:54:49,194 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6800160315698607 [2022-07-21 08:54:49,194 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 22057 transitions. [2022-07-21 08:54:49,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 22057 transitions. [2022-07-21 08:54:49,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:49,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 22057 transitions. [2022-07-21 08:54:49,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 208.08490566037736) internal successors, (22057), 106 states have internal predecessors, (22057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:49,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 306.0) internal successors, (32742), 107 states have internal predecessors, (32742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:49,259 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 306.0) internal successors, (32742), 107 states have internal predecessors, (32742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:49,259 INFO L186 Difference]: Start difference. First operand has 338 places, 305 transitions, 954 flow. Second operand 106 states and 22057 transitions. [2022-07-21 08:54:49,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 2029 transitions, 9935 flow [2022-07-21 08:54:52,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2029 transitions, 9887 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-07-21 08:54:52,316 INFO L242 Difference]: Finished difference. Result has 502 places, 650 transitions, 4042 flow [2022-07-21 08:54:52,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=4042, PETRI_PLACES=502, PETRI_TRANSITIONS=650} [2022-07-21 08:54:52,317 INFO L279 CegarLoopForPetriNet]: 272 programPoint places, 230 predicate places. [2022-07-21 08:54:52,317 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 650 transitions, 4042 flow [2022-07-21 08:54:52,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 194.76190476190476) internal successors, (8180), 42 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:52,318 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:52,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:52,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 08:54:52,519 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,SelfDestructingSolverStorable16 [2022-07-21 08:54:52,520 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:54:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash 109038267, now seen corresponding path program 2 times [2022-07-21 08:54:52,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:52,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287528001] [2022-07-21 08:54:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:52,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 08:54:53,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:53,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287528001] [2022-07-21 08:54:53,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287528001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:53,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:53,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-21 08:54:53,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104044186] [2022-07-21 08:54:53,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:53,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 08:54:53,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:53,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 08:54:53,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-07-21 08:54:53,370 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-07-21 08:54:53,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 650 transitions, 4042 flow. Second operand has 29 states, 29 states have (on average 193.79310344827587) internal successors, (5620), 29 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:53,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:53,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-07-21 08:54:53,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand