./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i -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 7a0803bc25bdee4cec741e6286f7294c3704d91bb65e5684830693d517eafafb --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:35:51,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:35:51,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:35:51,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:35:51,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:35:51,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:35:51,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:35:51,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:35:51,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:35:51,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:35:51,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:35:51,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:35:51,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:35:51,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:35:51,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:35:51,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:35:51,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:35:51,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:35:51,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:35:51,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:35:51,125 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:35:51,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:35:51,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:35:51,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:35:51,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:35:51,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:35:51,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:35:51,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:35:51,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:35:51,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:35:51,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:35:51,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:35:51,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:35:51,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:35:51,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:35:51,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:35:51,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:35:51,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:35:51,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:35:51,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:35:51,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:35:51,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:35:51,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:35:51,175 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:35:51,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:35:51,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:35:51,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:35:51,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:35:51,177 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:35:51,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:35:51,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:35:51,178 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:35:51,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:35:51,179 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:35:51,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:35:51,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:35:51,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:35:51,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:35:51,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:35:51,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:35:51,180 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:35:51,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:35:51,180 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:35:51,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:35:51,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:35:51,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:35:51,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:35:51,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:35:51,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:35:51,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:35:51,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:35:51,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:35:51,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:35:51,182 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:35:51,183 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:35:51,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:35:51,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a0803bc25bdee4cec741e6286f7294c3704d91bb65e5684830693d517eafafb [2022-07-21 08:35:51,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:35:51,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:35:51,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:35:51,504 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:35:51,505 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:35:51,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i [2022-07-21 08:35:51,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/754856378/c75c8da7cd5f4df2a29b50ca73f5361b/FLAG594002338 [2022-07-21 08:35:52,021 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:35:52,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i [2022-07-21 08:35:52,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/754856378/c75c8da7cd5f4df2a29b50ca73f5361b/FLAG594002338 [2022-07-21 08:35:52,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/754856378/c75c8da7cd5f4df2a29b50ca73f5361b [2022-07-21 08:35:52,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:35:52,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:35:52,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:35:52,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:35:52,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:35:52,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bea288e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52, skipping insertion in model container [2022-07-21 08:35:52,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:35:52,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:35:52,594 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i[30582,30595] [2022-07-21 08:35:52,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:35:52,613 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:35:52,667 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i[30582,30595] [2022-07-21 08:35:52,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:35:52,717 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:35:52,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52 WrapperNode [2022-07-21 08:35:52,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:35:52,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:35:52,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:35:52,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:35:52,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,777 INFO L137 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 101 [2022-07-21 08:35:52,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:35:52,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:35:52,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:35:52,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:35:52,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:35:52,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:35:52,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:35:52,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:35:52,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (1/1) ... [2022-07-21 08:35:52,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:35:52,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:35:52,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:35:52,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:35:52,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:35:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-21 08:35:52,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-21 08:35:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:35:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:35:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:35:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:35:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:35:52,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:35:52,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:35:52,897 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:35:53,023 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:35:53,024 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:35:53,229 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:35:53,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:35:53,268 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 08:35:53,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:35:53 BoogieIcfgContainer [2022-07-21 08:35:53,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:35:53,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:35:53,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:35:53,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:35:53,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:35:52" (1/3) ... [2022-07-21 08:35:53,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca5ff16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:35:53, skipping insertion in model container [2022-07-21 08:35:53,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:52" (2/3) ... [2022-07-21 08:35:53,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca5ff16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:35:53, skipping insertion in model container [2022-07-21 08:35:53,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:35:53" (3/3) ... [2022-07-21 08:35:53,277 INFO L111 eAbstractionObserver]: Analyzing ICFG 12_fmaxsymopt_cas.i [2022-07-21 08:35:53,284 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:35:53,292 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:35:53,293 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:35:53,293 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:35:53,372 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:35:53,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 102 transitions, 209 flow [2022-07-21 08:35:53,475 INFO L129 PetriNetUnfolder]: 12/113 cut-off events. [2022-07-21 08:35:53,476 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:35:53,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 12/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2022-07-21 08:35:53,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 102 transitions, 209 flow [2022-07-21 08:35:53,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 102 transitions, 209 flow [2022-07-21 08:35:53,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:35:53,499 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49ead6fc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d8852cf [2022-07-21 08:35:53,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 08:35:53,509 INFO L129 PetriNetUnfolder]: 2/53 cut-off events. [2022-07-21 08:35:53,509 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:35:53,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:53,510 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-07-21 08:35:53,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:35:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1635953085, now seen corresponding path program 1 times [2022-07-21 08:35:53,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:53,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942944600] [2022-07-21 08:35:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:53,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:53,653 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:35:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:53,715 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:35:53,716 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:35:53,717 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-21 08:35:53,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-21 08:35:53,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-21 08:35:53,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:35:53,719 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:35:53,722 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:35:53,722 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:35:53,759 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:35:53,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 150 places, 166 transitions, 344 flow [2022-07-21 08:35:53,802 INFO L129 PetriNetUnfolder]: 23/190 cut-off events. [2022-07-21 08:35:53,802 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:35:53,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 190 events. 23/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 408 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2022-07-21 08:35:53,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 166 transitions, 344 flow [2022-07-21 08:35:53,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 166 transitions, 344 flow [2022-07-21 08:35:53,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:35:53,810 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49ead6fc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d8852cf [2022-07-21 08:35:53,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:35:53,835 INFO L129 PetriNetUnfolder]: 4/85 cut-off events. [2022-07-21 08:35:53,835 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:35:53,836 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:53,836 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-07-21 08:35:53,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:35:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash -32075274, now seen corresponding path program 1 times [2022-07-21 08:35:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:53,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924661602] [2022-07-21 08:35:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:53,862 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:35:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:53,886 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:35:53,886 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:35:53,886 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:35:53,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:35:53,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-21 08:35:53,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:35:53,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:35:53,888 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:35:53,889 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:35:53,889 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:35:53,931 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:35:53,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 230 transitions, 481 flow [2022-07-21 08:35:53,990 INFO L129 PetriNetUnfolder]: 34/267 cut-off events. [2022-07-21 08:35:53,991 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:35:53,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 267 events. 34/267 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 750 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 202. Up to 8 conditions per place. [2022-07-21 08:35:53,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 230 transitions, 481 flow [2022-07-21 08:35:53,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 230 transitions, 481 flow [2022-07-21 08:35:54,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:35:54,002 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49ead6fc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d8852cf [2022-07-21 08:35:54,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:35:54,019 INFO L129 PetriNetUnfolder]: 8/125 cut-off events. [2022-07-21 08:35:54,019 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:35:54,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:54,020 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:54,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:35:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1459620510, now seen corresponding path program 1 times [2022-07-21 08:35:54,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:54,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883038085] [2022-07-21 08:35:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:54,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:54,050 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:35:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:54,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:35:54,075 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:35:54,076 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:35:54,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:35:54,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-21 08:35:54,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:35:54,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:35:54,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:35:54,077 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:35:54,077 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:35:54,078 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:35:54,144 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:35:54,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 262 places, 294 transitions, 620 flow [2022-07-21 08:35:54,230 INFO L129 PetriNetUnfolder]: 45/344 cut-off events. [2022-07-21 08:35:54,230 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:35:54,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 344 events. 45/344 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1120 event pairs, 0 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 275. Up to 10 conditions per place. [2022-07-21 08:35:54,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 294 transitions, 620 flow [2022-07-21 08:35:54,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 294 transitions, 620 flow [2022-07-21 08:35:54,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:35:54,261 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49ead6fc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d8852cf [2022-07-21 08:35:54,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:35:54,284 INFO L129 PetriNetUnfolder]: 14/175 cut-off events. [2022-07-21 08:35:54,284 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:35:54,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:54,284 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:54,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:35:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash 688159959, now seen corresponding path program 1 times [2022-07-21 08:35:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:54,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447490339] [2022-07-21 08:35:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:54,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:54,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447490339] [2022-07-21 08:35:54,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447490339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:54,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:54,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:35:54,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495556592] [2022-07-21 08:35:54,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:35:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:54,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:35:54,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:35:54,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 294 [2022-07-21 08:35:54,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 294 transitions, 620 flow. Second operand has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:54,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:54,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 294 [2022-07-21 08:35:54,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:54,723 INFO L129 PetriNetUnfolder]: 109/1030 cut-off events. [2022-07-21 08:35:54,723 INFO L130 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-07-21 08:35:54,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 1030 events. 109/1030 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5900 event pairs, 34 based on Foata normal form. 188/1102 useless extension candidates. Maximal degree in co-relation 539. Up to 65 conditions per place. [2022-07-21 08:35:54,748 INFO L132 encePairwiseOnDemand]: 272/294 looper letters, 8 selfloop transitions, 0 changer transitions 0/263 dead transitions. [2022-07-21 08:35:54,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 263 transitions, 574 flow [2022-07-21 08:35:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:35:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:35:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 550 transitions. [2022-07-21 08:35:54,767 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.935374149659864 [2022-07-21 08:35:54,768 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 550 transitions. [2022-07-21 08:35:54,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 550 transitions. [2022-07-21 08:35:54,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:54,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 550 transitions. [2022-07-21 08:35:54,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 275.0) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:54,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:54,785 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:54,786 INFO L186 Difference]: Start difference. First operand has 262 places, 294 transitions, 620 flow. Second operand 2 states and 550 transitions. [2022-07-21 08:35:54,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 263 transitions, 574 flow [2022-07-21 08:35:54,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 263 transitions, 562 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 08:35:54,801 INFO L242 Difference]: Finished difference. Result has 253 places, 263 transitions, 546 flow [2022-07-21 08:35:54,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=546, PETRI_PLACES=253, PETRI_TRANSITIONS=263} [2022-07-21 08:35:54,808 INFO L279 CegarLoopForPetriNet]: 262 programPoint places, -9 predicate places. [2022-07-21 08:35:54,809 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 263 transitions, 546 flow [2022-07-21 08:35:54,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:54,809 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:54,810 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:54,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:35:54,810 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:35:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash 833454973, now seen corresponding path program 1 times [2022-07-21 08:35:54,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:54,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698649123] [2022-07-21 08:35:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:54,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:54,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698649123] [2022-07-21 08:35:54,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698649123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:54,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:54,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:35:54,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270155285] [2022-07-21 08:35:54,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:54,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:35:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:35:54,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:35:54,900 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 294 [2022-07-21 08:35:54,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 263 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:54,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:54,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 294 [2022-07-21 08:35:54,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:55,743 INFO L129 PetriNetUnfolder]: 687/3642 cut-off events. [2022-07-21 08:35:55,743 INFO L130 PetriNetUnfolder]: For 379/379 co-relation queries the response was YES. [2022-07-21 08:35:55,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4781 conditions, 3642 events. 687/3642 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 32395 event pairs, 250 based on Foata normal form. 0/3113 useless extension candidates. Maximal degree in co-relation 4774. Up to 439 conditions per place. [2022-07-21 08:35:55,821 INFO L132 encePairwiseOnDemand]: 290/294 looper letters, 29 selfloop transitions, 3 changer transitions 0/274 dead transitions. [2022-07-21 08:35:55,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 274 transitions, 647 flow [2022-07-21 08:35:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:35:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:35:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2022-07-21 08:35:55,823 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8775510204081632 [2022-07-21 08:35:55,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2022-07-21 08:35:55,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2022-07-21 08:35:55,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:55,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2022-07-21 08:35:55,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:55,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:55,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:55,829 INFO L186 Difference]: Start difference. First operand has 253 places, 263 transitions, 546 flow. Second operand 3 states and 774 transitions. [2022-07-21 08:35:55,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 274 transitions, 647 flow [2022-07-21 08:35:55,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 274 transitions, 647 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:35:55,835 INFO L242 Difference]: Finished difference. Result has 256 places, 263 transitions, 557 flow [2022-07-21 08:35:55,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=557, PETRI_PLACES=256, PETRI_TRANSITIONS=263} [2022-07-21 08:35:55,837 INFO L279 CegarLoopForPetriNet]: 262 programPoint places, -6 predicate places. [2022-07-21 08:35:55,837 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 263 transitions, 557 flow [2022-07-21 08:35:55,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:55,838 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:55,838 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:55,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:35:55,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:35:55,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash 908884319, now seen corresponding path program 1 times [2022-07-21 08:35:55,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:55,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536020499] [2022-07-21 08:35:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:55,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:55,857 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:35:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:55,876 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:35:55,879 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:35:55,880 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 08:35:55,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 08:35:55,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-21 08:35:55,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 08:35:55,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 08:35:55,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 08:35:55,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:35:55,885 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:35:55,885 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:35:55,886 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:35:55,986 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:35:55,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 318 places, 358 transitions, 761 flow [2022-07-21 08:35:56,061 INFO L129 PetriNetUnfolder]: 56/421 cut-off events. [2022-07-21 08:35:56,062 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:35:56,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 421 events. 56/421 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1511 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 357. Up to 12 conditions per place. [2022-07-21 08:35:56,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 358 transitions, 761 flow [2022-07-21 08:35:56,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 358 transitions, 761 flow [2022-07-21 08:35:56,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:35:56,087 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49ead6fc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d8852cf [2022-07-21 08:35:56,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:35:56,102 INFO L129 PetriNetUnfolder]: 14/170 cut-off events. [2022-07-21 08:35:56,102 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:35:56,103 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:56,103 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:56,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:35:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:56,104 INFO L85 PathProgramCache]: Analyzing trace with hash -492306787, now seen corresponding path program 1 times [2022-07-21 08:35:56,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:56,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466748991] [2022-07-21 08:35:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:56,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:56,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:56,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466748991] [2022-07-21 08:35:56,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466748991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:56,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:56,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:35:56,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189369427] [2022-07-21 08:35:56,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:56,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:35:56,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:35:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:35:56,155 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 358 [2022-07-21 08:35:56,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 358 transitions, 761 flow. Second operand has 2 states, 2 states have (on average 317.0) internal successors, (634), 2 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:56,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:56,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 358 [2022-07-21 08:35:56,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:56,716 INFO L129 PetriNetUnfolder]: 253/2126 cut-off events. [2022-07-21 08:35:56,717 INFO L130 PetriNetUnfolder]: For 511/511 co-relation queries the response was YES. [2022-07-21 08:35:56,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 2126 events. 253/2126 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 15367 event pairs, 98 based on Foata normal form. 492/2376 useless extension candidates. Maximal degree in co-relation 1191. Up to 161 conditions per place. [2022-07-21 08:35:56,771 INFO L132 encePairwiseOnDemand]: 331/358 looper letters, 10 selfloop transitions, 0 changer transitions 0/321 dead transitions. [2022-07-21 08:35:56,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 321 transitions, 707 flow [2022-07-21 08:35:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:35:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:35:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 669 transitions. [2022-07-21 08:35:56,773 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9343575418994413 [2022-07-21 08:35:56,774 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 669 transitions. [2022-07-21 08:35:56,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 669 transitions. [2022-07-21 08:35:56,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:56,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 669 transitions. [2022-07-21 08:35:56,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:56,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:56,778 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:56,778 INFO L186 Difference]: Start difference. First operand has 318 places, 358 transitions, 761 flow. Second operand 2 states and 669 transitions. [2022-07-21 08:35:56,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 321 transitions, 707 flow [2022-07-21 08:35:56,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 321 transitions, 687 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-21 08:35:56,784 INFO L242 Difference]: Finished difference. Result has 308 places, 321 transitions, 667 flow [2022-07-21 08:35:56,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=667, PETRI_PLACES=308, PETRI_TRANSITIONS=321} [2022-07-21 08:35:56,786 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -10 predicate places. [2022-07-21 08:35:56,786 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 321 transitions, 667 flow [2022-07-21 08:35:56,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 317.0) internal successors, (634), 2 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:56,786 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:56,787 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:56,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:35:56,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:35:56,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1429904641, now seen corresponding path program 1 times [2022-07-21 08:35:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:56,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476553183] [2022-07-21 08:35:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:56,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:56,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:56,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476553183] [2022-07-21 08:35:56,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476553183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:56,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:56,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:35:56,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461249730] [2022-07-21 08:35:56,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:56,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:35:56,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:56,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:35:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:35:56,836 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 358 [2022-07-21 08:35:56,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 321 transitions, 667 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:56,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:56,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 358 [2022-07-21 08:35:56,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:58,979 INFO L129 PetriNetUnfolder]: 1833/9586 cut-off events. [2022-07-21 08:35:58,980 INFO L130 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2022-07-21 08:35:59,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12242 conditions, 9586 events. 1833/9586 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 104876 event pairs, 674 based on Foata normal form. 0/8263 useless extension candidates. Maximal degree in co-relation 12234. Up to 1071 conditions per place. [2022-07-21 08:35:59,239 INFO L132 encePairwiseOnDemand]: 354/358 looper letters, 33 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-07-21 08:35:59,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 334 transitions, 785 flow [2022-07-21 08:35:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:35:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:35:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 946 transitions. [2022-07-21 08:35:59,245 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8808193668528864 [2022-07-21 08:35:59,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 946 transitions. [2022-07-21 08:35:59,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 946 transitions. [2022-07-21 08:35:59,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:59,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 946 transitions. [2022-07-21 08:35:59,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:59,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:59,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:59,251 INFO L186 Difference]: Start difference. First operand has 308 places, 321 transitions, 667 flow. Second operand 3 states and 946 transitions. [2022-07-21 08:35:59,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 334 transitions, 785 flow [2022-07-21 08:35:59,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 334 transitions, 785 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:35:59,261 INFO L242 Difference]: Finished difference. Result has 311 places, 321 transitions, 678 flow [2022-07-21 08:35:59,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=678, PETRI_PLACES=311, PETRI_TRANSITIONS=321} [2022-07-21 08:35:59,262 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -7 predicate places. [2022-07-21 08:35:59,262 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 321 transitions, 678 flow [2022-07-21 08:35:59,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:59,263 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:59,263 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:59,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:35:59,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:35:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:59,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1487906071, now seen corresponding path program 1 times [2022-07-21 08:35:59,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:59,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615135627] [2022-07-21 08:35:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:59,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:59,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:59,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615135627] [2022-07-21 08:35:59,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615135627] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:59,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:59,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:35:59,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22459028] [2022-07-21 08:35:59,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:59,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:35:59,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:59,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:35:59,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:35:59,323 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 358 [2022-07-21 08:35:59,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 321 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:59,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:59,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 358 [2022-07-21 08:35:59,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:00,765 INFO L129 PetriNetUnfolder]: 1379/7043 cut-off events. [2022-07-21 08:36:00,766 INFO L130 PetriNetUnfolder]: For 755/755 co-relation queries the response was YES. [2022-07-21 08:36:00,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 7043 events. 1379/7043 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 72084 event pairs, 610 based on Foata normal form. 0/6177 useless extension candidates. Maximal degree in co-relation 9275. Up to 952 conditions per place. [2022-07-21 08:36:00,904 INFO L132 encePairwiseOnDemand]: 355/358 looper letters, 29 selfloop transitions, 2 changer transitions 0/333 dead transitions. [2022-07-21 08:36:00,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 333 transitions, 784 flow [2022-07-21 08:36:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2022-07-21 08:36:00,907 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8873370577281192 [2022-07-21 08:36:00,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2022-07-21 08:36:00,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2022-07-21 08:36:00,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:00,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2022-07-21 08:36:00,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:00,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:00,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:00,913 INFO L186 Difference]: Start difference. First operand has 311 places, 321 transitions, 678 flow. Second operand 3 states and 953 transitions. [2022-07-21 08:36:00,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 333 transitions, 784 flow [2022-07-21 08:36:00,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 333 transitions, 781 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:36:00,925 INFO L242 Difference]: Finished difference. Result has 313 places, 322 transitions, 687 flow [2022-07-21 08:36:00,925 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=687, PETRI_PLACES=313, PETRI_TRANSITIONS=322} [2022-07-21 08:36:00,927 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -5 predicate places. [2022-07-21 08:36:00,927 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 322 transitions, 687 flow [2022-07-21 08:36:00,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:00,928 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:00,928 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:00,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:36:00,929 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:36:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:00,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1969543966, now seen corresponding path program 1 times [2022-07-21 08:36:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:00,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511134304] [2022-07-21 08:36:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:00,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:36:00,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:00,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511134304] [2022-07-21 08:36:00,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511134304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:00,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:00,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:00,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450888369] [2022-07-21 08:36:00,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:00,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:00,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:00,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:00,982 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 358 [2022-07-21 08:36:00,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 322 transitions, 687 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:00,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:00,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 358 [2022-07-21 08:36:00,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:02,693 INFO L129 PetriNetUnfolder]: 1847/9295 cut-off events. [2022-07-21 08:36:02,693 INFO L130 PetriNetUnfolder]: For 764/764 co-relation queries the response was YES. [2022-07-21 08:36:02,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11988 conditions, 9295 events. 1847/9295 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 98815 event pairs, 755 based on Foata normal form. 0/8015 useless extension candidates. Maximal degree in co-relation 11977. Up to 1044 conditions per place. [2022-07-21 08:36:02,899 INFO L132 encePairwiseOnDemand]: 354/358 looper letters, 32 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-07-21 08:36:02,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 334 transitions, 796 flow [2022-07-21 08:36:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 945 transitions. [2022-07-21 08:36:02,903 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8798882681564246 [2022-07-21 08:36:02,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 945 transitions. [2022-07-21 08:36:02,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 945 transitions. [2022-07-21 08:36:02,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:02,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 945 transitions. [2022-07-21 08:36:02,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:02,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:02,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:02,909 INFO L186 Difference]: Start difference. First operand has 313 places, 322 transitions, 687 flow. Second operand 3 states and 945 transitions. [2022-07-21 08:36:02,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 334 transitions, 796 flow [2022-07-21 08:36:02,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 334 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:36:02,916 INFO L242 Difference]: Finished difference. Result has 315 places, 322 transitions, 696 flow [2022-07-21 08:36:02,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=696, PETRI_PLACES=315, PETRI_TRANSITIONS=322} [2022-07-21 08:36:02,919 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -3 predicate places. [2022-07-21 08:36:02,919 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 322 transitions, 696 flow [2022-07-21 08:36:02,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:02,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:02,920 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:02,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:36:02,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:36:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:02,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2049506815, now seen corresponding path program 1 times [2022-07-21 08:36:02,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:02,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139840672] [2022-07-21 08:36:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:02,948 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:36:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:02,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:36:02,987 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:36:02,988 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-21 08:36:02,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-21 08:36:02,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-21 08:36:02,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-21 08:36:02,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-21 08:36:02,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-21 08:36:02,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-21 08:36:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:36:02,990 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:36:02,991 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:36:02,992 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-21 08:36:03,056 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:36:03,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 374 places, 422 transitions, 904 flow [2022-07-21 08:36:03,156 INFO L129 PetriNetUnfolder]: 67/498 cut-off events. [2022-07-21 08:36:03,156 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-21 08:36:03,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 498 events. 67/498 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1888 event pairs, 0 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 440. Up to 14 conditions per place. [2022-07-21 08:36:03,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 422 transitions, 904 flow [2022-07-21 08:36:03,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 422 transitions, 904 flow [2022-07-21 08:36:03,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:36:03,176 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49ead6fc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d8852cf [2022-07-21 08:36:03,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-21 08:36:03,190 INFO L129 PetriNetUnfolder]: 13/168 cut-off events. [2022-07-21 08:36:03,191 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:36:03,191 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:03,191 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:03,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:36:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash 503615203, now seen corresponding path program 1 times [2022-07-21 08:36:03,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:03,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714153208] [2022-07-21 08:36:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:03,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:03,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714153208] [2022-07-21 08:36:03,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714153208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:03,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:03,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:36:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376025732] [2022-07-21 08:36:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:03,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:36:03,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:36:03,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:36:03,226 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 422 [2022-07-21 08:36:03,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 422 transitions, 904 flow. Second operand has 2 states, 2 states have (on average 373.5) internal successors, (747), 2 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:03,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:03,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 422 [2022-07-21 08:36:03,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:04,217 INFO L129 PetriNetUnfolder]: 573/4350 cut-off events. [2022-07-21 08:36:04,217 INFO L130 PetriNetUnfolder]: For 1503/1503 co-relation queries the response was YES. [2022-07-21 08:36:04,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5318 conditions, 4350 events. 573/4350 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 38090 event pairs, 258 based on Foata normal form. 1228/5084 useless extension candidates. Maximal degree in co-relation 2551. Up to 385 conditions per place. [2022-07-21 08:36:04,361 INFO L132 encePairwiseOnDemand]: 390/422 looper letters, 12 selfloop transitions, 0 changer transitions 0/379 dead transitions. [2022-07-21 08:36:04,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 379 transitions, 842 flow [2022-07-21 08:36:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:36:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:36:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 788 transitions. [2022-07-21 08:36:04,366 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.933649289099526 [2022-07-21 08:36:04,367 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 788 transitions. [2022-07-21 08:36:04,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 788 transitions. [2022-07-21 08:36:04,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:04,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 788 transitions. [2022-07-21 08:36:04,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.0) internal successors, (788), 2 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:04,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:04,376 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:04,377 INFO L186 Difference]: Start difference. First operand has 374 places, 422 transitions, 904 flow. Second operand 2 states and 788 transitions. [2022-07-21 08:36:04,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 379 transitions, 842 flow [2022-07-21 08:36:04,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 379 transitions, 812 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-21 08:36:04,387 INFO L242 Difference]: Finished difference. Result has 363 places, 379 transitions, 788 flow [2022-07-21 08:36:04,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=788, PETRI_PLACES=363, PETRI_TRANSITIONS=379} [2022-07-21 08:36:04,388 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -11 predicate places. [2022-07-21 08:36:04,388 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 379 transitions, 788 flow [2022-07-21 08:36:04,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 373.5) internal successors, (747), 2 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:04,389 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:04,389 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:04,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:36:04,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:36:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash 266410080, now seen corresponding path program 1 times [2022-07-21 08:36:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:04,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802832475] [2022-07-21 08:36:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:04,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:04,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:04,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802832475] [2022-07-21 08:36:04,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802832475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:04,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:04,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:04,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880998298] [2022-07-21 08:36:04,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:04,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:04,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:04,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:04,426 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-21 08:36:04,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 379 transitions, 788 flow. Second operand has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:04,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:04,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-21 08:36:04,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:09,408 INFO L129 PetriNetUnfolder]: 4491/22742 cut-off events. [2022-07-21 08:36:09,408 INFO L130 PetriNetUnfolder]: For 1675/1675 co-relation queries the response was YES. [2022-07-21 08:36:10,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28719 conditions, 22742 events. 4491/22742 cut-off events. For 1675/1675 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 287776 event pairs, 1698 based on Foata normal form. 0/19731 useless extension candidates. Maximal degree in co-relation 28710. Up to 2511 conditions per place. [2022-07-21 08:36:10,285 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 37 selfloop transitions, 3 changer transitions 0/394 dead transitions. [2022-07-21 08:36:10,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 394 transitions, 923 flow [2022-07-21 08:36:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1118 transitions. [2022-07-21 08:36:10,288 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8830963665086888 [2022-07-21 08:36:10,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1118 transitions. [2022-07-21 08:36:10,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1118 transitions. [2022-07-21 08:36:10,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:10,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1118 transitions. [2022-07-21 08:36:10,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.6666666666667) internal successors, (1118), 3 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:10,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:10,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:10,295 INFO L186 Difference]: Start difference. First operand has 363 places, 379 transitions, 788 flow. Second operand 3 states and 1118 transitions. [2022-07-21 08:36:10,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 394 transitions, 923 flow [2022-07-21 08:36:10,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 394 transitions, 923 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:36:10,309 INFO L242 Difference]: Finished difference. Result has 366 places, 379 transitions, 799 flow [2022-07-21 08:36:10,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=799, PETRI_PLACES=366, PETRI_TRANSITIONS=379} [2022-07-21 08:36:10,310 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -8 predicate places. [2022-07-21 08:36:10,310 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 379 transitions, 799 flow [2022-07-21 08:36:10,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:10,310 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:10,311 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:10,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:36:10,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:36:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:10,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1160838450, now seen corresponding path program 1 times [2022-07-21 08:36:10,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:10,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473537885] [2022-07-21 08:36:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:10,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:10,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:10,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473537885] [2022-07-21 08:36:10,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473537885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:10,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:10,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:10,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029713550] [2022-07-21 08:36:10,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:10,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:10,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:10,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:10,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:10,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 422 [2022-07-21 08:36:10,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 379 transitions, 799 flow. Second operand has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:10,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:10,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 422 [2022-07-21 08:36:10,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:14,011 INFO L129 PetriNetUnfolder]: 3439/17495 cut-off events. [2022-07-21 08:36:14,011 INFO L130 PetriNetUnfolder]: For 1523/1523 co-relation queries the response was YES. [2022-07-21 08:36:14,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22442 conditions, 17495 events. 3439/17495 cut-off events. For 1523/1523 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 210472 event pairs, 1538 based on Foata normal form. 0/15417 useless extension candidates. Maximal degree in co-relation 22431. Up to 2232 conditions per place. [2022-07-21 08:36:14,399 INFO L132 encePairwiseOnDemand]: 419/422 looper letters, 33 selfloop transitions, 2 changer transitions 0/393 dead transitions. [2022-07-21 08:36:14,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 393 transitions, 922 flow [2022-07-21 08:36:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1125 transitions. [2022-07-21 08:36:14,401 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8886255924170616 [2022-07-21 08:36:14,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1125 transitions. [2022-07-21 08:36:14,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1125 transitions. [2022-07-21 08:36:14,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:14,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1125 transitions. [2022-07-21 08:36:14,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:14,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:14,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:14,407 INFO L186 Difference]: Start difference. First operand has 366 places, 379 transitions, 799 flow. Second operand 3 states and 1125 transitions. [2022-07-21 08:36:14,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 393 transitions, 922 flow [2022-07-21 08:36:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 393 transitions, 919 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:36:14,420 INFO L242 Difference]: Finished difference. Result has 368 places, 380 transitions, 808 flow [2022-07-21 08:36:14,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=808, PETRI_PLACES=368, PETRI_TRANSITIONS=380} [2022-07-21 08:36:14,421 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -6 predicate places. [2022-07-21 08:36:14,421 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 380 transitions, 808 flow [2022-07-21 08:36:14,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:14,422 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:14,422 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:14,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 08:36:14,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:36:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1848432253, now seen corresponding path program 1 times [2022-07-21 08:36:14,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:14,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859999896] [2022-07-21 08:36:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:14,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:36:14,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:14,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859999896] [2022-07-21 08:36:14,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859999896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:14,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:14,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:14,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141508020] [2022-07-21 08:36:14,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:14,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:14,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:14,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:14,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:14,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-21 08:36:14,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 380 transitions, 808 flow. Second operand has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:14,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:14,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-21 08:36:14,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:18,806 INFO L129 PetriNetUnfolder]: 4229/19775 cut-off events. [2022-07-21 08:36:18,806 INFO L130 PetriNetUnfolder]: For 1628/1628 co-relation queries the response was YES. [2022-07-21 08:36:19,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25658 conditions, 19775 events. 4229/19775 cut-off events. For 1628/1628 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 242336 event pairs, 1689 based on Foata normal form. 0/17105 useless extension candidates. Maximal degree in co-relation 25646. Up to 2484 conditions per place. [2022-07-21 08:36:19,277 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 36 selfloop transitions, 3 changer transitions 0/394 dead transitions. [2022-07-21 08:36:19,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 394 transitions, 934 flow [2022-07-21 08:36:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1117 transitions. [2022-07-21 08:36:19,279 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.882306477093207 [2022-07-21 08:36:19,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1117 transitions. [2022-07-21 08:36:19,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1117 transitions. [2022-07-21 08:36:19,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:19,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1117 transitions. [2022-07-21 08:36:19,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.3333333333333) internal successors, (1117), 3 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:19,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:19,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:19,286 INFO L186 Difference]: Start difference. First operand has 368 places, 380 transitions, 808 flow. Second operand 3 states and 1117 transitions. [2022-07-21 08:36:19,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 394 transitions, 934 flow [2022-07-21 08:36:19,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 394 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:36:19,292 INFO L242 Difference]: Finished difference. Result has 370 places, 380 transitions, 817 flow [2022-07-21 08:36:19,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=817, PETRI_PLACES=370, PETRI_TRANSITIONS=380} [2022-07-21 08:36:19,293 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -4 predicate places. [2022-07-21 08:36:19,294 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 380 transitions, 817 flow [2022-07-21 08:36:19,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:19,294 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:19,294 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:19,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 08:36:19,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:36:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:19,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1553265593, now seen corresponding path program 1 times [2022-07-21 08:36:19,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:19,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114829768] [2022-07-21 08:36:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:19,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:36:19,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:19,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114829768] [2022-07-21 08:36:19,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114829768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:19,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:19,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:19,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087282605] [2022-07-21 08:36:19,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:19,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:19,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:19,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:19,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:19,324 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 422 [2022-07-21 08:36:19,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 380 transitions, 817 flow. Second operand has 3 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:19,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:19,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 422 [2022-07-21 08:36:19,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:22,490 INFO L129 PetriNetUnfolder]: 3197/14565 cut-off events. [2022-07-21 08:36:22,490 INFO L130 PetriNetUnfolder]: For 1515/1515 co-relation queries the response was YES. [2022-07-21 08:36:22,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19492 conditions, 14565 events. 3197/14565 cut-off events. For 1515/1515 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 169203 event pairs, 1530 based on Foata normal form. 0/12810 useless extension candidates. Maximal degree in co-relation 19479. Up to 2215 conditions per place. [2022-07-21 08:36:22,830 INFO L132 encePairwiseOnDemand]: 419/422 looper letters, 32 selfloop transitions, 2 changer transitions 0/393 dead transitions. [2022-07-21 08:36:22,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 393 transitions, 931 flow [2022-07-21 08:36:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2022-07-21 08:36:22,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8878357030015798 [2022-07-21 08:36:22,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2022-07-21 08:36:22,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2022-07-21 08:36:22,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:22,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2022-07-21 08:36:22,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:22,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:22,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:22,839 INFO L186 Difference]: Start difference. First operand has 370 places, 380 transitions, 817 flow. Second operand 3 states and 1124 transitions. [2022-07-21 08:36:22,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 393 transitions, 931 flow [2022-07-21 08:36:22,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 393 transitions, 928 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:36:22,849 INFO L242 Difference]: Finished difference. Result has 372 places, 381 transitions, 826 flow [2022-07-21 08:36:22,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=826, PETRI_PLACES=372, PETRI_TRANSITIONS=381} [2022-07-21 08:36:22,850 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -2 predicate places. [2022-07-21 08:36:22,850 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 381 transitions, 826 flow [2022-07-21 08:36:22,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:22,851 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:22,851 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 08:36:22,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:36:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash 431457669, now seen corresponding path program 1 times [2022-07-21 08:36:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:22,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005102042] [2022-07-21 08:36:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:22,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:22,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005102042] [2022-07-21 08:36:22,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005102042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:36:22,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454936516] [2022-07-21 08:36:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:22,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:36:22,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:36:22,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:36:22,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:36:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:23,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:36:23,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:36:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:23,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:36:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:23,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454936516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:36:23,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:36:23,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-21 08:36:23,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974769426] [2022-07-21 08:36:23,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:36:23,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:36:23,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:36:23,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:36:23,130 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 422 [2022-07-21 08:36:23,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 381 transitions, 826 flow. Second operand has 5 states, 5 states have (on average 364.2) internal successors, (1821), 5 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:23,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:23,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 422 [2022-07-21 08:36:23,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:26,420 INFO L129 PetriNetUnfolder]: 3613/14085 cut-off events. [2022-07-21 08:36:26,421 INFO L130 PetriNetUnfolder]: For 1647/1647 co-relation queries the response was YES. [2022-07-21 08:36:26,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20200 conditions, 14085 events. 3613/14085 cut-off events. For 1647/1647 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 158563 event pairs, 1218 based on Foata normal form. 63/12466 useless extension candidates. Maximal degree in co-relation 20186. Up to 1723 conditions per place. [2022-07-21 08:36:26,772 INFO L132 encePairwiseOnDemand]: 416/422 looper letters, 62 selfloop transitions, 6 changer transitions 0/426 dead transitions. [2022-07-21 08:36:26,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 426 transitions, 1152 flow [2022-07-21 08:36:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:36:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:36:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2241 transitions. [2022-07-21 08:36:26,777 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8850710900473934 [2022-07-21 08:36:26,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2241 transitions. [2022-07-21 08:36:26,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2241 transitions. [2022-07-21 08:36:26,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:26,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2241 transitions. [2022-07-21 08:36:26,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 373.5) internal successors, (2241), 6 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:26,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:26,787 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:26,787 INFO L186 Difference]: Start difference. First operand has 372 places, 381 transitions, 826 flow. Second operand 6 states and 2241 transitions. [2022-07-21 08:36:26,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 426 transitions, 1152 flow [2022-07-21 08:36:26,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 426 transitions, 1150 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:36:26,796 INFO L242 Difference]: Finished difference. Result has 380 places, 384 transitions, 860 flow [2022-07-21 08:36:26,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=380, PETRI_TRANSITIONS=384} [2022-07-21 08:36:26,797 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, 6 predicate places. [2022-07-21 08:36:26,797 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 384 transitions, 860 flow [2022-07-21 08:36:26,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 364.2) internal successors, (1821), 5 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:26,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:26,799 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:26,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 08:36:27,022 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,SelfDestructingSolverStorable16 [2022-07-21 08:36:27,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:36:27,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:27,022 INFO L85 PathProgramCache]: Analyzing trace with hash -805755012, now seen corresponding path program 1 times [2022-07-21 08:36:27,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:27,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492600433] [2022-07-21 08:36:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:27,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 08:36:27,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:27,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492600433] [2022-07-21 08:36:27,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492600433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:27,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:27,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:27,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588678134] [2022-07-21 08:36:27,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:27,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:27,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:27,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:27,176 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-21 08:36:27,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 384 transitions, 860 flow. Second operand has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:27,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:27,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-21 08:36:27,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand