./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-commit-2.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 f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:26:58,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:26:58,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:26:58,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:26:58,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:26:58,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:26:58,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:26:58,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:26:58,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:26:58,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:26:58,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:26:58,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:26:58,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:26:58,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:26:58,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:26:58,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:26:58,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:26:58,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:26:58,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:26:58,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:26:58,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:26:58,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:26:58,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:26:58,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:26:58,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:26:58,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:26:58,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:26:58,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:26:58,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:26:58,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:26:58,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:26:58,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:26:58,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:26:58,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:26:58,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:26:58,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:26:58,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:26:58,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:26:58,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:26:58,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:26:58,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:26:58,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:26:59,020 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:26:59,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:26:59,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:26:59,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:26:59,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:26:59,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:26:59,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:26:59,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:26:59,021 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:26:59,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:26:59,022 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:26:59,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:26:59,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:26:59,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:26:59,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:26:59,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:26:59,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:26:59,023 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:26:59,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:26:59,023 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:26:59,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:26:59,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:26:59,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:26:59,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:26:59,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:26:59,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:26:59,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:26:59,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:26:59,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:26:59,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:26:59,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:26:59,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:26:59,024 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:26:59,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:26:59,024 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:26:59,024 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:26:59,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:26:59,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:26:59,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:26:59,343 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:26:59,344 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:26:59,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c [2023-08-31 02:27:00,554 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:27:00,753 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:27:00,754 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c [2023-08-31 02:27:00,763 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11777f361/4c3621616c1a4530abd1915f2cab3a42/FLAG466f282c4 [2023-08-31 02:27:00,780 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11777f361/4c3621616c1a4530abd1915f2cab3a42 [2023-08-31 02:27:00,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:27:00,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:27:00,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:27:00,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:27:00,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:27:00,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:27:00" (1/1) ... [2023-08-31 02:27:00,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556fd47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:00, skipping insertion in model container [2023-08-31 02:27:00,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:27:00" (1/1) ... [2023-08-31 02:27:00,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:27:00,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:27:00,990 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c[5846,5859] [2023-08-31 02:27:00,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:27:01,007 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:27:01,043 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c[5846,5859] [2023-08-31 02:27:01,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:27:01,055 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:27:01,055 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:27:01,061 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:27:01,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01 WrapperNode [2023-08-31 02:27:01,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:27:01,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:27:01,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:27:01,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:27:01,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,135 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 474 [2023-08-31 02:27:01,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:27:01,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:27:01,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:27:01,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:27:01,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,205 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:27:01,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:27:01,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:27:01,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:27:01,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (1/1) ... [2023-08-31 02:27:01,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:27:01,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:27:01,259 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) [2023-08-31 02:27:01,282 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 [2023-08-31 02:27:01,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:27:01,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:27:01,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:27:01,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:27:01,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:27:01,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:27:01,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:27:01,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:27:01,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:27:01,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:27:01,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 02:27:01,300 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 02:27:01,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:27:01,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:27:01,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:27:01,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:27:01,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:27:01,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:27:01,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:27:01,302 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:27:01,442 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:27:01,462 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:27:02,128 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:27:02,431 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:27:02,432 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-31 02:27:02,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:27:02 BoogieIcfgContainer [2023-08-31 02:27:02,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:27:02,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:27:02,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:27:02,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:27:02,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:27:00" (1/3) ... [2023-08-31 02:27:02,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40865976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:27:02, skipping insertion in model container [2023-08-31 02:27:02,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:27:01" (2/3) ... [2023-08-31 02:27:02,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40865976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:27:02, skipping insertion in model container [2023-08-31 02:27:02,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:27:02" (3/3) ... [2023-08-31 02:27:02,443 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2023-08-31 02:27:02,451 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:27:02,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:27:02,459 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:27:02,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:27:02,564 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 02:27:02,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 321 transitions, 674 flow [2023-08-31 02:27:02,808 INFO L130 PetriNetUnfolder]: 25/317 cut-off events. [2023-08-31 02:27:02,808 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:27:02,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 317 events. 25/317 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 278. Up to 2 conditions per place. [2023-08-31 02:27:02,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 321 transitions, 674 flow [2023-08-31 02:27:02,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 305 transitions, 634 flow [2023-08-31 02:27:02,832 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:27:02,843 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 305 transitions, 634 flow [2023-08-31 02:27:02,845 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 305 transitions, 634 flow [2023-08-31 02:27:02,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 305 transitions, 634 flow [2023-08-31 02:27:02,902 INFO L130 PetriNetUnfolder]: 25/305 cut-off events. [2023-08-31 02:27:02,902 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:27:02,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 305 events. 25/305 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 278. Up to 2 conditions per place. [2023-08-31 02:27:02,908 INFO L119 LiptonReduction]: Number of co-enabled transitions 2928 [2023-08-31 02:27:13,354 INFO L134 LiptonReduction]: Checked pairs total: 6242 [2023-08-31 02:27:13,354 INFO L136 LiptonReduction]: Total number of compositions: 323 [2023-08-31 02:27:13,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:27:13,373 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e992deb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:27:13,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 02:27:13,382 INFO L130 PetriNetUnfolder]: 8/40 cut-off events. [2023-08-31 02:27:13,383 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:27:13,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:13,384 INFO L208 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] [2023-08-31 02:27:13,385 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 2 more)] === [2023-08-31 02:27:13,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:13,392 INFO L85 PathProgramCache]: Analyzing trace with hash -349444433, now seen corresponding path program 1 times [2023-08-31 02:27:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:13,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881854531] [2023-08-31 02:27:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:13,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:27:14,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:14,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881854531] [2023-08-31 02:27:14,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881854531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:14,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:14,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 02:27:14,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366190514] [2023-08-31 02:27:14,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:14,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:27:14,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:14,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:27:14,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:27:14,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 644 [2023-08-31 02:27:14,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:14,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:14,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 644 [2023-08-31 02:27:14,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:14,587 INFO L130 PetriNetUnfolder]: 2346/3110 cut-off events. [2023-08-31 02:27:14,587 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-08-31 02:27:14,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 3110 events. 2346/3110 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11954 event pairs, 381 based on Foata normal form. 1/2317 useless extension candidates. Maximal degree in co-relation 5552. Up to 2810 conditions per place. [2023-08-31 02:27:14,622 INFO L137 encePairwiseOnDemand]: 638/644 looper letters, 58 selfloop transitions, 5 changer transitions 1/64 dead transitions. [2023-08-31 02:27:14,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 301 flow [2023-08-31 02:27:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:27:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:27:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-08-31 02:27:14,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699792960662526 [2023-08-31 02:27:14,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-08-31 02:27:14,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-08-31 02:27:14,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:14,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-08-31 02:27:14,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:14,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:14,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:14,666 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 106 flow. Second operand 3 states and 908 transitions. [2023-08-31 02:27:14,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 301 flow [2023-08-31 02:27:14,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 02:27:14,675 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 123 flow [2023-08-31 02:27:14,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-08-31 02:27:14,682 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-31 02:27:14,685 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 123 flow [2023-08-31 02:27:14,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:14,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:14,686 INFO L208 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] [2023-08-31 02:27:14,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:27:14,687 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 2 more)] === [2023-08-31 02:27:14,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:14,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1893474723, now seen corresponding path program 1 times [2023-08-31 02:27:14,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:14,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826488846] [2023-08-31 02:27:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:14,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:27:14,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:14,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826488846] [2023-08-31 02:27:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826488846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:14,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:14,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:27:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312108913] [2023-08-31 02:27:14,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:14,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:27:14,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:27:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:27:15,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-08-31 02:27:15,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 271.75) internal successors, (1087), 4 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:15,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:15,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-08-31 02:27:15,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:15,566 INFO L130 PetriNetUnfolder]: 2646/3592 cut-off events. [2023-08-31 02:27:15,566 INFO L131 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2023-08-31 02:27:15,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8455 conditions, 3592 events. 2646/3592 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13439 event pairs, 1817 based on Foata normal form. 166/3568 useless extension candidates. Maximal degree in co-relation 3795. Up to 3111 conditions per place. [2023-08-31 02:27:15,582 INFO L137 encePairwiseOnDemand]: 637/644 looper letters, 44 selfloop transitions, 2 changer transitions 30/76 dead transitions. [2023-08-31 02:27:15,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 76 transitions, 355 flow [2023-08-31 02:27:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:27:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:27:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1134 transitions. [2023-08-31 02:27:15,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44021739130434784 [2023-08-31 02:27:15,587 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1134 transitions. [2023-08-31 02:27:15,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1134 transitions. [2023-08-31 02:27:15,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:15,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1134 transitions. [2023-08-31 02:27:15,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.5) internal successors, (1134), 4 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:15,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:15,596 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:15,596 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 123 flow. Second operand 4 states and 1134 transitions. [2023-08-31 02:27:15,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 76 transitions, 355 flow [2023-08-31 02:27:15,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:27:15,599 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 140 flow [2023-08-31 02:27:15,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-31 02:27:15,600 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-31 02:27:15,601 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 140 flow [2023-08-31 02:27:15,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.75) internal successors, (1087), 4 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:15,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:15,602 INFO L208 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] [2023-08-31 02:27:15,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:27:15,602 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 2 more)] === [2023-08-31 02:27:15,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1954963629, now seen corresponding path program 1 times [2023-08-31 02:27:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033867075] [2023-08-31 02:27:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:27:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:15,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033867075] [2023-08-31 02:27:15,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033867075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:15,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:15,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:27:15,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755107476] [2023-08-31 02:27:15,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:15,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:27:15,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:15,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:27:15,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:27:15,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-08-31 02:27:15,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:15,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:15,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-08-31 02:27:15,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:16,367 INFO L130 PetriNetUnfolder]: 2852/3829 cut-off events. [2023-08-31 02:27:16,368 INFO L131 PetriNetUnfolder]: For 1529/1529 co-relation queries the response was YES. [2023-08-31 02:27:16,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9573 conditions, 3829 events. 2852/3829 cut-off events. For 1529/1529 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14402 event pairs, 765 based on Foata normal form. 140/3965 useless extension candidates. Maximal degree in co-relation 9559. Up to 2698 conditions per place. [2023-08-31 02:27:16,390 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 68 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-31 02:27:16,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 347 flow [2023-08-31 02:27:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:27:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:27:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-08-31 02:27:16,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46790890269151136 [2023-08-31 02:27:16,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-08-31 02:27:16,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-08-31 02:27:16,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:16,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-08-31 02:27:16,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:16,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:16,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:16,401 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 140 flow. Second operand 3 states and 904 transitions. [2023-08-31 02:27:16,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 347 flow [2023-08-31 02:27:16,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 343 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:27:16,404 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 144 flow [2023-08-31 02:27:16,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-31 02:27:16,405 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-08-31 02:27:16,405 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 144 flow [2023-08-31 02:27:16,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:16,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:16,406 INFO L208 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] [2023-08-31 02:27:16,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 02:27:16,407 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 2 more)] === [2023-08-31 02:27:16,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:16,407 INFO L85 PathProgramCache]: Analyzing trace with hash -418605730, now seen corresponding path program 1 times [2023-08-31 02:27:16,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:16,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198784642] [2023-08-31 02:27:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:16,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:27:16,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:16,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198784642] [2023-08-31 02:27:16,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198784642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:16,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:16,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:27:16,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12511699] [2023-08-31 02:27:16,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:16,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:27:16,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:16,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:27:16,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:27:16,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 644 [2023-08-31 02:27:16,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:16,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:16,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 644 [2023-08-31 02:27:16,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:17,064 INFO L130 PetriNetUnfolder]: 2676/3627 cut-off events. [2023-08-31 02:27:17,064 INFO L131 PetriNetUnfolder]: For 1635/1635 co-relation queries the response was YES. [2023-08-31 02:27:17,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9333 conditions, 3627 events. 2676/3627 cut-off events. For 1635/1635 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13554 event pairs, 689 based on Foata normal form. 132/3755 useless extension candidates. Maximal degree in co-relation 9313. Up to 2700 conditions per place. [2023-08-31 02:27:17,085 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 68 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-31 02:27:17,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 353 flow [2023-08-31 02:27:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:27:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:27:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 899 transitions. [2023-08-31 02:27:17,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46532091097308487 [2023-08-31 02:27:17,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 899 transitions. [2023-08-31 02:27:17,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 899 transitions. [2023-08-31 02:27:17,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:17,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 899 transitions. [2023-08-31 02:27:17,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:17,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:17,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:17,112 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 144 flow. Second operand 3 states and 899 transitions. [2023-08-31 02:27:17,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 353 flow [2023-08-31 02:27:17,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:27:17,116 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 150 flow [2023-08-31 02:27:17,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-31 02:27:17,117 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-31 02:27:17,117 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 150 flow [2023-08-31 02:27:17,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:17,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:17,118 INFO L208 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] [2023-08-31 02:27:17,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 02:27:17,118 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 2 more)] === [2023-08-31 02:27:17,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash -354281914, now seen corresponding path program 1 times [2023-08-31 02:27:17,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:17,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800861659] [2023-08-31 02:27:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:27:17,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:17,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800861659] [2023-08-31 02:27:17,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800861659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:17,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:17,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:27:17,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199905954] [2023-08-31 02:27:17,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:17,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:27:17,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:27:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:27:17,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 644 [2023-08-31 02:27:17,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:17,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:17,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 644 [2023-08-31 02:27:17,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:17,800 INFO L130 PetriNetUnfolder]: 3151/4250 cut-off events. [2023-08-31 02:27:17,801 INFO L131 PetriNetUnfolder]: For 2502/2502 co-relation queries the response was YES. [2023-08-31 02:27:17,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11311 conditions, 4250 events. 3151/4250 cut-off events. For 2502/2502 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 15712 event pairs, 896 based on Foata normal form. 104/4350 useless extension candidates. Maximal degree in co-relation 11289. Up to 2724 conditions per place. [2023-08-31 02:27:17,820 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 61 selfloop transitions, 2 changer transitions 8/71 dead transitions. [2023-08-31 02:27:17,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 361 flow [2023-08-31 02:27:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:27:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:27:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 902 transitions. [2023-08-31 02:27:17,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668737060041408 [2023-08-31 02:27:17,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 902 transitions. [2023-08-31 02:27:17,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 902 transitions. [2023-08-31 02:27:17,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:17,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 902 transitions. [2023-08-31 02:27:17,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:17,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:17,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:17,831 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 150 flow. Second operand 3 states and 902 transitions. [2023-08-31 02:27:17,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 361 flow [2023-08-31 02:27:17,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:27:17,834 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 156 flow [2023-08-31 02:27:17,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-31 02:27:17,835 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-31 02:27:17,835 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 156 flow [2023-08-31 02:27:17,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:17,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:17,836 INFO L208 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] [2023-08-31 02:27:17,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 02:27:17,836 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 2 more)] === [2023-08-31 02:27:17,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:17,837 INFO L85 PathProgramCache]: Analyzing trace with hash -556616439, now seen corresponding path program 1 times [2023-08-31 02:27:17,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:17,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402441184] [2023-08-31 02:27:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:17,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:27:18,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:18,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402441184] [2023-08-31 02:27:18,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402441184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:18,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:18,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:27:18,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185708900] [2023-08-31 02:27:18,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:18,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:27:18,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:27:18,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:27:18,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-08-31 02:27:18,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:18,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:18,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-08-31 02:27:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:18,939 INFO L130 PetriNetUnfolder]: 4217/5773 cut-off events. [2023-08-31 02:27:18,940 INFO L131 PetriNetUnfolder]: For 3607/3607 co-relation queries the response was YES. [2023-08-31 02:27:18,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15544 conditions, 5773 events. 4217/5773 cut-off events. For 3607/3607 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 23145 event pairs, 3251 based on Foata normal form. 80/5846 useless extension candidates. Maximal degree in co-relation 15520. Up to 4248 conditions per place. [2023-08-31 02:27:18,968 INFO L137 encePairwiseOnDemand]: 639/644 looper letters, 44 selfloop transitions, 3 changer transitions 34/81 dead transitions. [2023-08-31 02:27:18,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 418 flow [2023-08-31 02:27:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:27:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:27:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1137 transitions. [2023-08-31 02:27:18,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44138198757763975 [2023-08-31 02:27:18,973 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1137 transitions. [2023-08-31 02:27:18,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1137 transitions. [2023-08-31 02:27:18,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:18,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1137 transitions. [2023-08-31 02:27:18,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:18,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:18,982 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:18,983 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 156 flow. Second operand 4 states and 1137 transitions. [2023-08-31 02:27:18,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 418 flow [2023-08-31 02:27:18,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:27:18,991 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 172 flow [2023-08-31 02:27:18,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-31 02:27:18,995 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-31 02:27:18,995 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 172 flow [2023-08-31 02:27:18,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:18,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:18,997 INFO L208 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] [2023-08-31 02:27:18,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 02:27:18,997 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 2 more)] === [2023-08-31 02:27:18,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2129506320, now seen corresponding path program 1 times [2023-08-31 02:27:18,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:18,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055981391] [2023-08-31 02:27:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:18,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:27:19,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:19,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055981391] [2023-08-31 02:27:19,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055981391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:19,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:19,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:27:19,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752862742] [2023-08-31 02:27:19,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:19,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:27:19,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:27:19,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:27:19,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-08-31 02:27:19,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 273.25) internal successors, (1093), 4 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:19,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:19,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-08-31 02:27:19,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:19,885 INFO L130 PetriNetUnfolder]: 3401/4661 cut-off events. [2023-08-31 02:27:19,886 INFO L131 PetriNetUnfolder]: For 3070/3070 co-relation queries the response was YES. [2023-08-31 02:27:19,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12616 conditions, 4661 events. 3401/4661 cut-off events. For 3070/3070 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 18054 event pairs, 2604 based on Foata normal form. 38/4694 useless extension candidates. Maximal degree in co-relation 12587. Up to 4246 conditions per place. [2023-08-31 02:27:19,908 INFO L137 encePairwiseOnDemand]: 639/644 looper letters, 45 selfloop transitions, 3 changer transitions 24/72 dead transitions. [2023-08-31 02:27:19,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 380 flow [2023-08-31 02:27:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:27:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:27:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1127 transitions. [2023-08-31 02:27:19,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-08-31 02:27:19,913 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1127 transitions. [2023-08-31 02:27:19,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1127 transitions. [2023-08-31 02:27:19,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:19,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1127 transitions. [2023-08-31 02:27:19,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 281.75) internal successors, (1127), 4 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:19,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:19,919 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:19,920 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 172 flow. Second operand 4 states and 1127 transitions. [2023-08-31 02:27:19,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 380 flow [2023-08-31 02:27:19,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 370 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 02:27:19,926 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 180 flow [2023-08-31 02:27:19,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-31 02:27:19,927 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-31 02:27:19,927 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 180 flow [2023-08-31 02:27:19,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.25) internal successors, (1093), 4 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:19,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:19,928 INFO L208 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] [2023-08-31 02:27:19,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 02:27:19,929 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 2 more)] === [2023-08-31 02:27:19,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:19,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1842908479, now seen corresponding path program 1 times [2023-08-31 02:27:19,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:19,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225887638] [2023-08-31 02:27:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:19,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:27:20,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:20,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225887638] [2023-08-31 02:27:20,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225887638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:20,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:20,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:27:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159595712] [2023-08-31 02:27:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:20,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:27:20,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:27:20,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:27:20,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-08-31 02:27:20,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:20,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:20,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-08-31 02:27:20,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:20,798 INFO L130 PetriNetUnfolder]: 3522/4838 cut-off events. [2023-08-31 02:27:20,799 INFO L131 PetriNetUnfolder]: For 3203/3203 co-relation queries the response was YES. [2023-08-31 02:27:20,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13084 conditions, 4838 events. 3522/4838 cut-off events. For 3203/3203 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 18911 event pairs, 2708 based on Foata normal form. 56/4891 useless extension candidates. Maximal degree in co-relation 13055. Up to 4244 conditions per place. [2023-08-31 02:27:20,829 INFO L137 encePairwiseOnDemand]: 634/644 looper letters, 41 selfloop transitions, 8 changer transitions 25/74 dead transitions. [2023-08-31 02:27:20,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 404 flow [2023-08-31 02:27:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:27:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:27:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1396 transitions. [2023-08-31 02:27:20,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335403726708075 [2023-08-31 02:27:20,834 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1396 transitions. [2023-08-31 02:27:20,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1396 transitions. [2023-08-31 02:27:20,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:20,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1396 transitions. [2023-08-31 02:27:20,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:20,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 644.0) internal successors, (3864), 6 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:20,843 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 644.0) internal successors, (3864), 6 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:20,843 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 180 flow. Second operand 5 states and 1396 transitions. [2023-08-31 02:27:20,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 404 flow [2023-08-31 02:27:20,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 392 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 02:27:20,850 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 202 flow [2023-08-31 02:27:20,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-31 02:27:20,853 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2023-08-31 02:27:20,853 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 202 flow [2023-08-31 02:27:20,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:20,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:20,854 INFO L208 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] [2023-08-31 02:27:20,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 02:27:20,855 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 2 more)] === [2023-08-31 02:27:20,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1999596867, now seen corresponding path program 1 times [2023-08-31 02:27:20,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:20,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623334609] [2023-08-31 02:27:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:27:21,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:21,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623334609] [2023-08-31 02:27:21,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623334609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:21,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:21,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 02:27:21,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333690773] [2023-08-31 02:27:21,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:21,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:27:21,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:27:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:27:21,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-08-31 02:27:21,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:21,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:21,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-08-31 02:27:21,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:21,491 INFO L130 PetriNetUnfolder]: 1883/2543 cut-off events. [2023-08-31 02:27:21,492 INFO L131 PetriNetUnfolder]: For 1868/1868 co-relation queries the response was YES. [2023-08-31 02:27:21,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6966 conditions, 2543 events. 1883/2543 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8435 event pairs, 709 based on Foata normal form. 30/2572 useless extension candidates. Maximal degree in co-relation 6933. Up to 2325 conditions per place. [2023-08-31 02:27:21,506 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 51 selfloop transitions, 2 changer transitions 9/62 dead transitions. [2023-08-31 02:27:21,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 358 flow [2023-08-31 02:27:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:27:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:27:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2023-08-31 02:27:21,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616977225672878 [2023-08-31 02:27:21,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2023-08-31 02:27:21,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2023-08-31 02:27:21,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:21,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2023-08-31 02:27:21,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:21,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:21,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:21,516 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 202 flow. Second operand 3 states and 892 transitions. [2023-08-31 02:27:21,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 358 flow [2023-08-31 02:27:21,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 340 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 02:27:21,522 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 198 flow [2023-08-31 02:27:21,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-08-31 02:27:21,523 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2023-08-31 02:27:21,523 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 198 flow [2023-08-31 02:27:21,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:21,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:21,524 INFO L208 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] [2023-08-31 02:27:21,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 02:27:21,524 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 2 more)] === [2023-08-31 02:27:21,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -852059088, now seen corresponding path program 1 times [2023-08-31 02:27:21,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:21,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834973667] [2023-08-31 02:27:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:21,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:27:21,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834973667] [2023-08-31 02:27:21,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834973667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:21,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:21,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:27:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957630034] [2023-08-31 02:27:21,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:21,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:27:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:21,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:27:21,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:27:21,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-08-31 02:27:21,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:21,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:21,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-08-31 02:27:21,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:22,674 INFO L130 PetriNetUnfolder]: 5057/6765 cut-off events. [2023-08-31 02:27:22,674 INFO L131 PetriNetUnfolder]: For 5355/5355 co-relation queries the response was YES. [2023-08-31 02:27:22,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19325 conditions, 6765 events. 5057/6765 cut-off events. For 5355/5355 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26305 event pairs, 1639 based on Foata normal form. 198/6962 useless extension candidates. Maximal degree in co-relation 19294. Up to 2697 conditions per place. [2023-08-31 02:27:22,708 INFO L137 encePairwiseOnDemand]: 637/644 looper letters, 89 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2023-08-31 02:27:22,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 578 flow [2023-08-31 02:27:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:27:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:27:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1207 transitions. [2023-08-31 02:27:22,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468555900621118 [2023-08-31 02:27:22,712 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1207 transitions. [2023-08-31 02:27:22,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1207 transitions. [2023-08-31 02:27:22,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:22,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1207 transitions. [2023-08-31 02:27:22,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 301.75) internal successors, (1207), 4 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:22,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:22,731 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:22,732 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 198 flow. Second operand 4 states and 1207 transitions. [2023-08-31 02:27:22,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 578 flow [2023-08-31 02:27:22,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 101 transitions, 574 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:27:22,738 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 294 flow [2023-08-31 02:27:22,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-08-31 02:27:22,739 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2023-08-31 02:27:22,740 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 294 flow [2023-08-31 02:27:22,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:22,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:22,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:27:22,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 02:27:22,741 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 2 more)] === [2023-08-31 02:27:22,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash 335744450, now seen corresponding path program 1 times [2023-08-31 02:27:22,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:22,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244893946] [2023-08-31 02:27:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:22,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:27:23,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:23,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244893946] [2023-08-31 02:27:23,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244893946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:27:23,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184302782] [2023-08-31 02:27:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:23,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:27:23,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:27:23,023 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) [2023-08-31 02:27:23,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:27:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:23,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:27:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:27:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:27:23,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:27:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:27:23,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184302782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:27:23,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:27:23,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 02:27:23,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801445383] [2023-08-31 02:27:23,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:27:23,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:27:23,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:27:23,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:27:23,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 644 [2023-08-31 02:27:23,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 294 flow. Second operand has 12 states, 12 states have (on average 260.3333333333333) internal successors, (3124), 12 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:23,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:23,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 644 [2023-08-31 02:27:23,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:24,772 INFO L130 PetriNetUnfolder]: 5288/7161 cut-off events. [2023-08-31 02:27:24,773 INFO L131 PetriNetUnfolder]: For 10275/10275 co-relation queries the response was YES. [2023-08-31 02:27:24,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23568 conditions, 7161 events. 5288/7161 cut-off events. For 10275/10275 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28333 event pairs, 3732 based on Foata normal form. 16/7175 useless extension candidates. Maximal degree in co-relation 22532. Up to 6765 conditions per place. [2023-08-31 02:27:24,809 INFO L137 encePairwiseOnDemand]: 638/644 looper letters, 57 selfloop transitions, 3 changer transitions 45/105 dead transitions. [2023-08-31 02:27:24,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 662 flow [2023-08-31 02:27:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:27:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:27:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2023-08-31 02:27:24,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41847826086956524 [2023-08-31 02:27:24,814 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1617 transitions. [2023-08-31 02:27:24,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1617 transitions. [2023-08-31 02:27:24,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:24,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1617 transitions. [2023-08-31 02:27:24,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.5) internal successors, (1617), 6 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:24,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 644.0) internal successors, (4508), 7 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:24,825 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 644.0) internal successors, (4508), 7 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:24,825 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 294 flow. Second operand 6 states and 1617 transitions. [2023-08-31 02:27:24,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 662 flow [2023-08-31 02:27:24,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 636 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-31 02:27:24,838 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 294 flow [2023-08-31 02:27:24,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-08-31 02:27:24,839 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-08-31 02:27:24,839 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 294 flow [2023-08-31 02:27:24,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 260.3333333333333) internal successors, (3124), 12 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:24,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:24,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:27:24,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:27:25,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-31 02:27:25,060 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 2 more)] === [2023-08-31 02:27:25,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:25,062 INFO L85 PathProgramCache]: Analyzing trace with hash -493373472, now seen corresponding path program 2 times [2023-08-31 02:27:25,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:25,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421565286] [2023-08-31 02:27:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:25,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:27:25,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:25,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421565286] [2023-08-31 02:27:25,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421565286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:27:25,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414015134] [2023-08-31 02:27:25,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:27:25,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:27:25,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:27:25,378 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) [2023-08-31 02:27:25,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:27:25,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:27:25,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:27:25,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 02:27:25,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:27:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:27:25,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:27:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:27:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414015134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:27:25,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:27:25,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 02:27:25,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991021482] [2023-08-31 02:27:25,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:27:25,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 02:27:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 02:27:25,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-31 02:27:26,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 644 [2023-08-31 02:27:26,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 258.8888888888889) internal successors, (4660), 18 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:26,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:26,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 644 [2023-08-31 02:27:26,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:27,530 INFO L130 PetriNetUnfolder]: 5372/7294 cut-off events. [2023-08-31 02:27:27,531 INFO L131 PetriNetUnfolder]: For 8521/8521 co-relation queries the response was YES. [2023-08-31 02:27:27,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23031 conditions, 7294 events. 5372/7294 cut-off events. For 8521/8521 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28948 event pairs, 3740 based on Foata normal form. 28/7320 useless extension candidates. Maximal degree in co-relation 22993. Up to 6765 conditions per place. [2023-08-31 02:27:27,577 INFO L137 encePairwiseOnDemand]: 638/644 looper letters, 57 selfloop transitions, 4 changer transitions 54/115 dead transitions. [2023-08-31 02:27:27,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 115 transitions, 728 flow [2023-08-31 02:27:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:27:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:27:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2137 transitions. [2023-08-31 02:27:27,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41479037267080743 [2023-08-31 02:27:27,583 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2137 transitions. [2023-08-31 02:27:27,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2137 transitions. [2023-08-31 02:27:27,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:27,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2137 transitions. [2023-08-31 02:27:27,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 267.125) internal successors, (2137), 8 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:27,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 644.0) internal successors, (5796), 9 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:27,594 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 644.0) internal successors, (5796), 9 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:27,594 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 294 flow. Second operand 8 states and 2137 transitions. [2023-08-31 02:27:27,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 115 transitions, 728 flow [2023-08-31 02:27:27,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 115 transitions, 708 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-31 02:27:27,607 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 314 flow [2023-08-31 02:27:27,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2023-08-31 02:27:27,608 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2023-08-31 02:27:27,608 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 314 flow [2023-08-31 02:27:27,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 258.8888888888889) internal successors, (4660), 18 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:27,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:27,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:27:27,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 02:27:27,815 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,SelfDestructingSolverStorable11 [2023-08-31 02:27:27,816 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 2 more)] === [2023-08-31 02:27:27,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:27,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2111651186, now seen corresponding path program 3 times [2023-08-31 02:27:27,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:27,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004733581] [2023-08-31 02:27:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:27,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 02:27:28,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:28,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004733581] [2023-08-31 02:27:28,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004733581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:27:28,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145069711] [2023-08-31 02:27:28,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:27:28,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:27:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:27:28,359 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) [2023-08-31 02:27:28,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:27:28,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:27:28,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:27:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 02:27:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:27:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-31 02:27:28,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:27:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-31 02:27:28,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145069711] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:27:28,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:27:28,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-08-31 02:27:28,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048548804] [2023-08-31 02:27:28,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:27:28,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:27:28,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:28,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:27:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:27:29,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 644 [2023-08-31 02:27:29,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 314 flow. Second operand has 12 states, 12 states have (on average 257.5) internal successors, (3090), 12 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:29,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:29,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 644 [2023-08-31 02:27:29,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:32,162 INFO L130 PetriNetUnfolder]: 18348/25227 cut-off events. [2023-08-31 02:27:32,162 INFO L131 PetriNetUnfolder]: For 40134/40134 co-relation queries the response was YES. [2023-08-31 02:27:32,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82252 conditions, 25227 events. 18348/25227 cut-off events. For 40134/40134 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 126503 event pairs, 6024 based on Foata normal form. 1976/27199 useless extension candidates. Maximal degree in co-relation 82207. Up to 6441 conditions per place. [2023-08-31 02:27:32,323 INFO L137 encePairwiseOnDemand]: 634/644 looper letters, 139 selfloop transitions, 14 changer transitions 161/314 dead transitions. [2023-08-31 02:27:32,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 314 transitions, 2022 flow [2023-08-31 02:27:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 02:27:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 02:27:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5525 transitions. [2023-08-31 02:27:32,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085329784087548 [2023-08-31 02:27:32,338 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5525 transitions. [2023-08-31 02:27:32,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5525 transitions. [2023-08-31 02:27:32,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:32,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5525 transitions. [2023-08-31 02:27:32,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 263.0952380952381) internal successors, (5525), 21 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:32,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 644.0) internal successors, (14168), 22 states have internal predecessors, (14168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:32,368 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 644.0) internal successors, (14168), 22 states have internal predecessors, (14168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:32,368 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 314 flow. Second operand 21 states and 5525 transitions. [2023-08-31 02:27:32,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 314 transitions, 2022 flow [2023-08-31 02:27:32,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 314 transitions, 1930 flow, removed 43 selfloop flow, removed 6 redundant places. [2023-08-31 02:27:32,410 INFO L231 Difference]: Finished difference. Result has 95 places, 67 transitions, 383 flow [2023-08-31 02:27:32,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=383, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2023-08-31 02:27:32,411 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 49 predicate places. [2023-08-31 02:27:32,411 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 383 flow [2023-08-31 02:27:32,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 257.5) internal successors, (3090), 12 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:32,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:32,412 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:27:32,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 02:27:32,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:27:32,623 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 2 more)] === [2023-08-31 02:27:32,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:32,624 INFO L85 PathProgramCache]: Analyzing trace with hash -990366533, now seen corresponding path program 1 times [2023-08-31 02:27:32,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:32,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304616186] [2023-08-31 02:27:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:32,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-31 02:27:32,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:32,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304616186] [2023-08-31 02:27:32,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304616186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:27:32,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:27:32,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:27:32,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820478517] [2023-08-31 02:27:32,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:32,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:27:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:32,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:27:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:27:32,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-08-31 02:27:32,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:32,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:32,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-08-31 02:27:32,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:39,160 INFO L130 PetriNetUnfolder]: 37552/50260 cut-off events. [2023-08-31 02:27:39,160 INFO L131 PetriNetUnfolder]: For 133074/133074 co-relation queries the response was YES. [2023-08-31 02:27:39,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179980 conditions, 50260 events. 37552/50260 cut-off events. For 133074/133074 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 246066 event pairs, 12155 based on Foata normal form. 1340/51598 useless extension candidates. Maximal degree in co-relation 179921. Up to 17334 conditions per place. [2023-08-31 02:27:39,530 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 134 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2023-08-31 02:27:39,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1045 flow [2023-08-31 02:27:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:27:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:27:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1207 transitions. [2023-08-31 02:27:39,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468555900621118 [2023-08-31 02:27:39,533 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1207 transitions. [2023-08-31 02:27:39,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1207 transitions. [2023-08-31 02:27:39,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:39,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1207 transitions. [2023-08-31 02:27:39,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 301.75) internal successors, (1207), 4 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:39,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:39,543 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:39,543 INFO L175 Difference]: Start difference. First operand has 95 places, 67 transitions, 383 flow. Second operand 4 states and 1207 transitions. [2023-08-31 02:27:39,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1045 flow [2023-08-31 02:27:39,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 139 transitions, 994 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-08-31 02:27:39,703 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 386 flow [2023-08-31 02:27:39,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2023-08-31 02:27:39,705 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 38 predicate places. [2023-08-31 02:27:39,705 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 386 flow [2023-08-31 02:27:39,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:39,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:27:39,705 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:27:39,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 02:27:39,706 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 2 more)] === [2023-08-31 02:27:39,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:27:39,706 INFO L85 PathProgramCache]: Analyzing trace with hash -156124942, now seen corresponding path program 1 times [2023-08-31 02:27:39,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:27:39,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477781493] [2023-08-31 02:27:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:39,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:27:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:27:49,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:49,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477781493] [2023-08-31 02:27:49,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477781493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:27:49,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575235356] [2023-08-31 02:27:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:27:49,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:27:49,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:27:49,033 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) [2023-08-31 02:27:49,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:27:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 133 conjunts are in the unsatisfiable core [2023-08-31 02:27:49,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:27:50,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 02:27:50,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:27:50,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:27:50,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:27:50,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:27:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:27:52,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:28:03,492 WARN L222 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:28:27,952 WARN L222 SmtUtils]: Spent 24.13s on a formula simplification. DAG size of input: 61 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:29:18,466 WARN L222 SmtUtils]: Spent 50.15s on a formula simplification. DAG size of input: 65 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:29:44,732 WARN L222 SmtUtils]: Spent 26.07s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:30:09,129 WARN L222 SmtUtils]: Spent 24.09s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:31:09,930 WARN L222 SmtUtils]: Spent 1.00m on a formula simplification. DAG size of input: 88 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:32:06,333 WARN L222 SmtUtils]: Spent 56.14s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:34:25,713 WARN L222 SmtUtils]: Spent 2.28m on a formula simplification. DAG size of input: 105 DAG size of output: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:35:12,465 WARN L222 SmtUtils]: Spent 46.16s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:35:36,164 WARN L222 SmtUtils]: Spent 9.04s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:35:36,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:35:36,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 192 [2023-08-31 02:35:36,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:35:36,833 INFO L350 Elim1Store]: Elim1 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 6961241 treesize of output 6694659 [2023-08-31 02:35:44,187 WARN L222 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 3537 DAG size of output: 828 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-31 02:35:44,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:35:44,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 20027 treesize of output 19619 [2023-08-31 02:35:44,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:35:44,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 19421 treesize of output 14771 [2023-08-31 02:35:45,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:35:45,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 14573 treesize of output 13559 [2023-08-31 02:35:45,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:35:45,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 13361 treesize of output 11135 Killed by 15